Add qtpy-rp2040 to TinyGo v0.25.0

.circleci/config.yml

@@ -118,7 +118,13 @@ jobs:
     steps:
       - test-linux:
           llvm: "14"
-    resource_class: large
+  test-llvm14-go119:
+    docker:
+      - image: golang:1.19beta1-buster
+    steps:
+      - test-linux:
+          llvm: "14"
+          fmt-check: false
 
 workflows:
   test-all:
@@ -126,3 +132,6 @@ workflows:
       # This tests our lowest supported versions of Go and LLVM, to make sure at
       # least the smoke tests still pass.
       - test-llvm14-go118
+      # This tests a beta version of Go. It should be removed once regular
+      # release builds are built using this version.
+      - test-llvm14-go119

.github/workflows/build-macos.yml

@@ -16,6 +16,10 @@ jobs:
     name: build-macos
     runs-on: macos-11
     steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.18.1'
       - name: Install Dependencies
         shell: bash
         run: |
@@ -31,13 +35,8 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: true
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.19'
-          cache: true
       - name: Cache LLVM source
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-source
         with:
           key: llvm-source-14-macos-v1
@@ -51,7 +50,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Cache LLVM build
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-build
         with:
           key: llvm-build-14-macos-v1
@@ -69,7 +68,7 @@ jobs:
           make llvm-build
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Cache wasi-libc sysroot
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-wasi-libc
         with:
           key: wasi-libc-sysroot-v4
@@ -105,17 +104,23 @@ jobs:
     name: homebrew-install
     runs-on: macos-latest
     steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.18'
       - name: Install LLVM
         shell: bash
         run: |
           HOMEBREW_NO_AUTO_UPDATE=1 brew install llvm@14
       - name: Checkout
         uses: actions/checkout@v2
-      - name: Install Go
-        uses: actions/setup-go@v3
+      - name: Cache Go
+        uses: actions/cache@v2
         with:
-          go-version: '1.19'
-          cache: true
+          key: go-cache-macos-homebrew-v1-${{ hashFiles('go.mod') }}
+          path: |
+            ~/Library/Caches/go-build
+            ~/go/pkg/mod
       - name: Build TinyGo
         run: go install
       - name: Check binary

.github/workflows/linux.yml

@@ -18,13 +18,14 @@ jobs:
     # statically linked binary.
     runs-on: ubuntu-latest
     container:
-      image: golang:1.19-alpine
+      image: alpine:3.16
     steps:
       - name: Install apk dependencies
-        # tar: needed for actions/cache@v3
+        # tar: needed for actions/cache@v2
         # git+openssh: needed for checkout (I think?)
+        # gcompat: needed for go binary
         # ruby: needed to install fpm
-        run: apk add tar git openssh make g++ ruby
+        run: apk add tar git openssh gcompat make g++ ruby
       - name: Work around CVE-2022-24765
         # We're not on a multi-user machine, so this is safe.
         run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
@@ -32,15 +33,19 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: true
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.18.1'
       - name: Cache Go
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         with:
           key: go-cache-linux-alpine-v1-${{ hashFiles('go.mod') }}
           path: |
             ~/.cache/go-build
             ~/go/pkg/mod
       - name: Cache LLVM source
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-source
         with:
           key: llvm-source-14-linux-alpine-v1
@@ -54,7 +59,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Cache LLVM build
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-build
         with:
           key: llvm-build-14-linux-alpine-v1
@@ -72,7 +77,7 @@ jobs:
           # Remove unnecessary object files (to reduce cache size).
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Cache Binaryen
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-binaryen
         with:
           key: binaryen-linux-alpine-v1
@@ -83,7 +88,7 @@ jobs:
           apk add cmake samurai python3
           make binaryen STATIC=1
       - name: Cache wasi-libc
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-wasi-libc
         with:
           key: wasi-libc-sysroot-linux-alpine-v1
@@ -116,10 +121,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
       - name: Install Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v2
         with:
-          go-version: '1.19'
-          cache: true
+          go-version: '1.18.1'
       - name: Install wasmtime
         run: |
           curl https://wasmtime.dev/install.sh -sSf | bash
@@ -169,10 +173,9 @@ jobs:
               simavr \
               ninja-build
       - name: Install Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v2
         with:
-          go-version: '1.19'
-          cache: true
+          go-version: '1.18.1'
       - name: Install Node.js
         uses: actions/setup-node@v2
         with:
@@ -181,8 +184,15 @@ jobs:
         run: |
           curl https://wasmtime.dev/install.sh -sSf | bash
           echo "$HOME/.wasmtime/bin" >> $GITHUB_PATH
+      - name: Cache Go
+        uses: actions/cache@v2
+        with:
+          key: go-cache-linux-asserts-v1-${{ hashFiles('go.mod') }}
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
       - name: Cache LLVM source
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-source
         with:
           key: llvm-source-14-linux-asserts-v2
@@ -196,7 +206,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Cache LLVM build
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-build
         with:
           key: llvm-build-14-linux-asserts-v1
@@ -212,7 +222,7 @@ jobs:
           # Remove unnecessary object files (to reduce cache size).
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Cache Binaryen
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-binaryen
         with:
           key: binaryen-linux-asserts-v1
@@ -221,7 +231,7 @@ jobs:
         if: steps.cache-binaryen.outputs.cache-hit != 'true'
         run: make binaryen
       - name: Cache wasi-libc
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-wasi-libc
         with:
           key: wasi-libc-sysroot-linux-asserts-v5
@@ -236,8 +246,6 @@ jobs:
         run: |
           make ASSERT=1
           echo "$(pwd)/build" >> $GITHUB_PATH
-      - name: Test machine package
-        run: make check-machine
       - name: Test stdlib packages
         run: make tinygo-test
       - name: Install Xtensa toolchain
@@ -271,12 +279,18 @@ jobs:
               g++-arm-linux-gnueabihf \
               libc6-dev-armhf-cross
       - name: Install Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v2
         with:
-          go-version: '1.19'
-          cache: true
+          go-version: '1.18.1'
+      - name: Cache Go
+        uses: actions/cache@v2
+        with:
+          key: go-cache-linux-arm-v2-${{ hashFiles('go.mod') }}
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
       - name: Cache LLVM source
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-source
         with:
           key: llvm-source-14-linux-v2
@@ -290,7 +304,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Cache LLVM build
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-build
         with:
           key: llvm-build-14-linux-arm-v1
@@ -308,7 +322,7 @@ jobs:
           # Remove unnecessary object files (to reduce cache size).
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Cache Binaryen
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-binaryen
         with:
           key: binaryen-linux-arm-v1
@@ -371,12 +385,18 @@ jobs:
               libc6-dev-arm64-cross \
               ninja-build
       - name: Install Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v2
         with:
-          go-version: '1.19'
-          cache: true
+          go-version: '1.18.1'
+      - name: Cache Go
+        uses: actions/cache@v2
+        with:
+          key: go-cache-linux-arm64-v2-${{ hashFiles('go.mod') }}
+          path: |
+            ~/.cache/go-build
+            ~/go/pkg/mod
       - name: Cache LLVM source
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-source
         with:
           key: llvm-source-14-linux-v1
@@ -390,7 +410,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Cache LLVM build
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-build
         with:
           key: llvm-build-14-linux-arm64-v1
@@ -406,7 +426,7 @@ jobs:
           # Remove unnecessary object files (to reduce cache size).
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Cache Binaryen
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-binaryen
         with:
           key: binaryen-linux-arm64-v1

.github/workflows/windows.yml

@@ -15,6 +15,10 @@ jobs:
   build-windows:
     runs-on: windows-2022
     steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.18.1'
       - uses: brechtm/setup-scoop@v2
         with:
           scoop_update: 'false'
@@ -26,13 +30,15 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: true
-      - name: Install Go
-        uses: actions/setup-go@v3
+      - name: Cache Go
+        uses: actions/cache@v2
         with:
-          go-version: '1.19'
-          cache: true
+          key: go-cache-windows-v1-${{ hashFiles('go.mod') }}
+          path: |
+            ~/AppData/Local/go-build
+            ~/go/pkg/mod
       - name: Cache LLVM source
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-source
         with:
           key: llvm-source-14-windows-v2
@@ -46,7 +52,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Cache LLVM build
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-llvm-build
         with:
           key: llvm-build-14-windows-v2
@@ -63,7 +69,7 @@ jobs:
           # Remove unnecessary object files (to reduce cache size).
           find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
       - name: Cache wasi-libc sysroot
-        uses: actions/cache@v3
+        uses: actions/cache@v2
         id: cache-wasi-libc
         with:
           key: wasi-libc-sysroot-v4

Dockerfile

@@ -1,5 +1,5 @@
 # tinygo-llvm stage obtains the llvm source for TinyGo
-FROM golang:1.19 AS tinygo-llvm
+FROM golang:1.18 AS tinygo-llvm
 
 RUN apt-get update && \
     apt-get install -y apt-utils make cmake clang-11 binutils-avr gcc-avr avr-libc ninja-build

Makefile

@@ -267,18 +267,6 @@ tinygo:
 test: wasi-libc
 	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=20m -buildmode exe -tags "byollvm osusergo" ./builder ./cgo ./compileopts ./compiler ./interp ./transform .
 
-# Check whether the machine package matches the documentation.
-# TODO: improve `tinygo targets` so it doesn't return these invalid targets.
-CHECK_MACHINE_EXCULDE = \
-	cortex-m-qemu \
-	particle-3rd-gen \
-	riscv-qemu \
-	riscv64-qemu \
-	rp2040 \
-	$(nil)
-check-machine:
-	$(GO) run ./tools/machinecheck $(filter-out $(CHECK_MACHINE_EXCULDE),$(shell $(TINYGO) targets))
-
 # Standard library packages that pass tests on darwin, linux, wasi, and windows, but take over a minute in wasi
 TEST_PACKAGES_SLOW = \
 	compress/bzip2 \
@@ -338,14 +326,11 @@ TEST_PACKAGES_FAST += crypto/elliptic/internal/fiat
 endif
 
 # archive/zip requires os.ReadAt, which is not yet supported on windows
-# compress/flate appears to hang on wasi
-# compress/lzw appears to hang on wasi
-# crypto/hmac fails on wasi, it exits with a "slice out of range" panic
 # debug/plan9obj requires os.ReadAt, which is not yet supported on windows
-# io/ioutil requires os.ReadDir, which is not yet supported on windows or wasi
-# strconv requires recover() which is not yet supported on wasi
-# text/template/parse requires recover(), which is not yet supported on wasi
+# io/fs requires os.ReadDir, which is not yet supported on windows or wasi
 # testing/fstest requires os.ReadDir, which is not yet supported on windows or wasi
+# compress/flate fails windows go 1.18, https://github.com/tinygo-org/tinygo/issues/2762
+# compress/lzw fails windows go 1.18 wasi, https://github.com/tinygo-org/tinygo/issues/2762
 
 # Additional standard library packages that pass tests on individual platforms
 TEST_PACKAGES_LINUX := \
@@ -355,6 +340,7 @@ TEST_PACKAGES_LINUX := \
 	crypto/hmac \
 	debug/dwarf \
 	debug/plan9obj \
+	io/fs \
 	io/ioutil \
 	strconv \
 	testing/fstest \
@@ -363,12 +349,7 @@ TEST_PACKAGES_LINUX := \
 TEST_PACKAGES_DARWIN := $(TEST_PACKAGES_LINUX)
 
 TEST_PACKAGES_WINDOWS := \
-	compress/flate \
-	compress/lzw \
-	crypto/hmac \
-	strconv \
-	text/template/parse \
-	$(nil)
+	compress/lzw
 
 # Report platforms on which each standard library package is known to pass tests
 jointmp := $(shell echo /tmp/join.$$$$)
@@ -383,15 +364,12 @@ report-stdlib-tests-pass:
 # Standard library packages that pass tests quickly on the current platform
 ifeq ($(shell uname),Darwin)
 TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_DARWIN)
-TEST_IOFS := true
 endif
 ifeq ($(shell uname),Linux)
 TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_LINUX)
-TEST_IOFS := true
 endif
 ifeq ($(OS),Windows_NT)
 TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_WINDOWS)
-TEST_IOFS := false
 endif
 
 # Test known-working standard library packages.
@@ -399,12 +377,6 @@ endif
 .PHONY: tinygo-test
 tinygo-test:
 	$(TINYGO) test $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
-	@# io/fs requires os.ReadDir, not yet supported on windows or wasi. It also
-	@# requires a large stack-size. Hence, io/fs is only run conditionally.
-	@# For more details, see the comments on issue #3143.
-ifeq ($(TEST_IOFS),true)
-	$(TINYGO) test -stack-size=6MB io/fs
-endif
 tinygo-test-fast:
 	$(TINYGO) test $(TEST_PACKAGES_HOST)
 tinygo-bench:
@@ -414,9 +386,9 @@ tinygo-bench-fast:
 
 # Same thing, except for wasi rather than the current platform.
 tinygo-test-wasi:
-	$(TINYGO) test -target wasi $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
+	$(TINYGO) test -target wasi $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW)
 tinygo-test-wasi-fast:
-	$(TINYGO) test -target wasi $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
+	$(TINYGO) test -target wasi $(TEST_PACKAGES_FAST)
 tinygo-bench-wasi:
 	$(TINYGO) test -target wasi -bench . $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW)
 tinygo-bench-wasi-fast:
@@ -438,7 +410,6 @@ tinygo-baremetal:
 .PHONY: smoketest
 smoketest:
 	$(TINYGO) version
-	$(TINYGO) targets > /dev/null
 	# regression test for #2892
 	cd tests/testing/recurse && ($(TINYGO) test ./... > recurse.log && cat recurse.log && test $$(wc -l < recurse.log) = 2 && rm recurse.log)
 	# compile-only platform-independent examples
@@ -548,8 +519,6 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=feather-m4          examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=matrixportal-m4     examples/blinky1
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pybadge             examples/blinky1
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=metro-m4-airlift    examples/blinky1
@@ -630,7 +599,7 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=challenger-rp2040    examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=trinkey-qt2040      examples/temp
+	$(TINYGO) build -size short -o test.hex -target=trinkey-qt2040      examples/adc_rp2040
 	@$(MD5SUM) test.hex
 	# test pwm
 	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m0        examples/pwm
@@ -712,9 +681,7 @@ ifneq ($(XTENSA), 0)
 	$(TINYGO) build -size short -o test.bin -target mch2022             examples/serial
 	@$(MD5SUM) test.bin
 endif
-	$(TINYGO) build -size short -o test.bin -target=esp32c3             examples/serial
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32c3-12f         examples/serial
+	$(TINYGO) build -size short -o test.bin -target=esp32c3           	examples/serial
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=m5stamp-c3          examples/serial
 	@$(MD5SUM) test.bin
@@ -722,6 +689,8 @@ endif
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.hex -target=hifive1b            examples/blinky1
 	@$(MD5SUM) test.hex
+	$(TINYGO) build -size short -o test.hex -target=hifive1-qemu        examples/serial
+	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=maixbit             examples/blinky1
 	@$(MD5SUM) test.hex
 ifneq ($(WASM), 0)

README.md

@@ -125,7 +125,7 @@ The following 91 microcontroller boards are currently supported:
 * [Seeed LoRa-E5 Development Kit](https://www.seeedstudio.com/LoRa-E5-Dev-Kit-p-4868.html)
 * [Seeed Sipeed MAix BiT](https://www.seeedstudio.com/Sipeed-MAix-BiT-for-RISC-V-AI-IoT-p-2872.html)
 * [Seeed Wio Terminal](https://www.seeedstudio.com/Wio-Terminal-p-4509.html)
-* [SiFIve HiFive1 Rev B](https://www.sifive.com/boards/hifive1-rev-b)
+* [SiFIve HiFive1 Rev B](https://www.sifive.com/boards/hifive1)
 * [Sparkfun Thing Plus RP2040](https://www.sparkfun.com/products/17745)
 * [ST Micro "Nucleo" F103RB](https://www.st.com/en/evaluation-tools/nucleo-f103rb.html)
 * [ST Micro "Nucleo" F722ZE](https://www.st.com/en/evaluation-tools/nucleo-f722ze.html)

builder/build.go

@@ -178,7 +178,7 @@ func Build(pkgName, outpath string, config *compileopts.Config, action func(Buil
 
 		Scheduler:          config.Scheduler(),
 		AutomaticStackSize: config.AutomaticStackSize(),
-		DefaultStackSize:   config.StackSize(),
+		DefaultStackSize:   config.Target.DefaultStackSize,
 		NeedsStackObjects:  config.NeedsStackObjects(),
 		Debug:              true,
 	}

cgo/cgo.go

@@ -32,7 +32,6 @@ type cgoPackage struct {
 	errors          []error
 	currentDir      string // current working directory
 	packageDir      string // full path to the package to process
-	importPath      string
 	fset            *token.FileSet
 	tokenFiles      map[string]*token.File
 	definedGlobally map[string]ast.Node
@@ -40,15 +39,12 @@ type cgoPackage struct {
 	cflags          []string // CFlags from #cgo lines
 	ldflags         []string // LDFlags from #cgo lines
 	visitedFiles    map[string][]byte
-	cgoHeaders      []string
 }
 
 // cgoFile holds information only for a single Go file (with one or more
 // `import "C"` statements).
 type cgoFile struct {
 	*cgoPackage
-	file    *ast.File
-	index   int
 	defined map[string]ast.Node
 	names   map[string]clangCursor
 }
@@ -162,10 +158,9 @@ func GoBytes(ptr unsafe.Pointer, length C.int) []byte {
 // functions), the CFLAGS and LDFLAGS found in #cgo lines, and a map of file
 // hashes of the accessed C header files. If there is one or more error, it
 // returns these in the []error slice but still modifies the AST.
-func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cflags []string, clangHeaders string) (*ast.File, []string, []string, []string, map[string][]byte, []error) {
+func Process(files []*ast.File, dir string, fset *token.FileSet, cflags []string, clangHeaders string) (*ast.File, []string, []string, []string, map[string][]byte, []error) {
 	p := &cgoPackage{
 		currentDir:      dir,
-		importPath:      importPath,
 		fset:            fset,
 		tokenFiles:      map[string]*token.File{},
 		definedGlobally: map[string]ast.Node{},
@@ -215,13 +210,13 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 		}
 	}
 	// Patch some types, for example *C.char in C.CString.
-	cf := p.newCGoFile(nil, -1) // dummy *cgoFile for the walker
+	cf := p.newCGoFile()
 	astutil.Apply(p.generated, func(cursor *astutil.Cursor) bool {
 		return cf.walker(cursor, nil)
 	}, nil)
 
 	// Find `import "C"` C fragments in the file.
-	p.cgoHeaders = make([]string, len(files)) // combined CGo header fragment for each file
+	cgoHeaders := make([]string, len(files)) // combined CGo header fragment for each file
 	for i, f := range files {
 		var cgoHeader string
 		for i := 0; i < len(f.Decls); i++ {
@@ -280,7 +275,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 			cgoHeader += fragment
 		}
 
-		p.cgoHeaders[i] = cgoHeader
+		cgoHeaders[i] = cgoHeader
 	}
 
 	// Define CFlags that will be used while parsing the package.
@@ -294,7 +289,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 	}
 
 	// Retrieve types such as C.int, C.longlong, etc from C.
-	p.newCGoFile(nil, -1).readNames(builtinAliasTypedefs, cflagsForCGo, "", func(names map[string]clangCursor) {
+	p.newCGoFile().readNames(builtinAliasTypedefs, cflagsForCGo, "", func(names map[string]clangCursor) {
 		gen := &ast.GenDecl{
 			TokPos: token.NoPos,
 			Tok:    token.TYPE,
@@ -308,8 +303,8 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 
 	// Process CGo imports for each file.
 	for i, f := range files {
-		cf := p.newCGoFile(f, i)
-		cf.readNames(p.cgoHeaders[i], cflagsForCGo, filepath.Base(fset.File(f.Pos()).Name()), func(names map[string]clangCursor) {
+		cf := p.newCGoFile()
+		cf.readNames(cgoHeaders[i], cflagsForCGo, filepath.Base(fset.File(f.Pos()).Name()), func(names map[string]clangCursor) {
 			for _, name := range builtinAliases {
 				// Names such as C.int should not be obtained from C.
 				// This works around an issue in picolibc that has `#define int`
@@ -325,14 +320,12 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 	// Print the newly generated in-memory AST, for debugging.
 	//ast.Print(fset, p.generated)
 
-	return p.generated, p.cgoHeaders, p.cflags, p.ldflags, p.visitedFiles, p.errors
+	return p.generated, cgoHeaders, p.cflags, p.ldflags, p.visitedFiles, p.errors
 }
 
-func (p *cgoPackage) newCGoFile(file *ast.File, index int) *cgoFile {
+func (p *cgoPackage) newCGoFile() *cgoFile {
 	return &cgoFile{
 		cgoPackage: p,
-		file:       file,
-		index:      index,
 		defined:    make(map[string]ast.Node),
 		names:      make(map[string]clangCursor),
 	}
@@ -1124,11 +1117,8 @@ func (f *cgoFile) getASTDeclName(name string, found clangCursor, iscall bool) st
 		return alias
 	}
 	node := f.getASTDeclNode(name, found, iscall)
-	if node, ok := node.(*ast.FuncDecl); ok {
-		if !iscall {
-			return node.Name.Name + "$funcaddr"
-		}
-		return node.Name.Name
+	if _, ok := node.(*ast.FuncDecl); ok && !iscall {
+		return "C." + name + "$funcaddr"
 	}
 	return "C." + name
 }
@@ -1152,7 +1142,7 @@ func (f *cgoFile) getASTDeclNode(name string, found clangCursor, iscall bool) as
 			// Original cgo reports an error like
 			//   cgo: inconsistent definitions for C.myint
 			// which is far less helpful.
-			f.addError(getPos(node), name+" defined previously at "+f.fset.Position(getPos(newNode)).String()+" with a different type")
+			f.addError(getPos(node), "defined previously at "+f.fset.Position(getPos(newNode)).String()+" with a different type")
 		}
 		f.defined[name] = node
 		return node
@@ -1160,39 +1150,11 @@ func (f *cgoFile) getASTDeclNode(name string, found clangCursor, iscall bool) as
 
 	// The declaration has no AST node. Create it now.
 	f.defined[name] = nil
-	node, extra := f.createASTNode(name, found)
+	node, elaboratedType := f.createASTNode(name, found)
 	f.defined[name] = node
+	f.definedGlobally[name] = node
 	switch node := node.(type) {
 	case *ast.FuncDecl:
-		if strings.HasPrefix(node.Doc.List[0].Text, "//export _Cgo_static_") {
-			// Static function. Only accessible in the current Go file.
-			globalName := strings.TrimPrefix(node.Doc.List[0].Text, "//export ")
-			// Make an alias. Normally this is done using the alias function
-			// attribute, but MacOS for some reason doesn't support this (even
-			// though the linker has support for aliases in the form of N_INDR).
-			// Therefore, create an actual function for MacOS.
-			var params []string
-			for _, param := range node.Type.Params.List {
-				params = append(params, param.Names[0].Name)
-			}
-			callInst := fmt.Sprintf("%s(%s);", name, strings.Join(params, ", "))
-			if node.Type.Results != nil {
-				callInst = "return " + callInst
-			}
-			aliasDeclaration := fmt.Sprintf(`
-#ifdef __APPLE__
-%s {
-	%s
-}
-#else
-extern __typeof(%s) %s __attribute__((alias(%#v)));
-#endif
-`, extra.(string), callInst, name, globalName, name)
-			f.cgoHeaders[f.index] += "\n\n" + aliasDeclaration
-		} else {
-			// Regular (non-static) function.
-			f.definedGlobally[name] = node
-		}
 		f.generated.Decls = append(f.generated.Decls, node)
 		// Also add a declaration like the following:
 		//   var C.foo$funcaddr unsafe.Pointer
@@ -1200,7 +1162,7 @@ extern __typeof(%s) %s __attribute__((alias(%#v)));
 			Tok: token.VAR,
 			Specs: []ast.Spec{
 				&ast.ValueSpec{
-					Names: []*ast.Ident{{Name: node.Name.Name + "$funcaddr"}},
+					Names: []*ast.Ident{{Name: "C." + name + "$funcaddr"}},
 					Type: &ast.SelectorExpr{
 						X:   &ast.Ident{Name: "unsafe"},
 						Sel: &ast.Ident{Name: "Pointer"},
@@ -1209,10 +1171,8 @@ extern __typeof(%s) %s __attribute__((alias(%#v)));
 			},
 		})
 	case *ast.GenDecl:
-		f.definedGlobally[name] = node
 		f.generated.Decls = append(f.generated.Decls, node)
 	case *ast.TypeSpec:
-		f.definedGlobally[name] = node
 		f.generated.Decls = append(f.generated.Decls, &ast.GenDecl{
 			Tok:   token.TYPE,
 			Specs: []ast.Spec{node},
@@ -1226,8 +1186,7 @@ extern __typeof(%s) %s __attribute__((alias(%#v)));
 
 	// If this is a struct or union it may need bitfields or union accessor
 	// methods.
-	switch elaboratedType := extra.(type) {
-	case *elaboratedTypeInfo:
+	if elaboratedType != nil {
 		// Add struct bitfields.
 		for _, bitfield := range elaboratedType.bitfields {
 			f.createBitfieldGetter(bitfield, "C."+name)

cgo/cgo_test.go

@@ -48,7 +48,7 @@ func TestCGo(t *testing.T) {
 			}
 
 			// Process the AST with CGo.
-			cgoAST, _, _, _, _, cgoErrors := Process([]*ast.File{f}, "testdata", "main", fset, cflags, "")
+			cgoAST, _, _, _, _, cgoErrors := Process([]*ast.File{f}, "testdata", fset, cflags, "")
 
 			// Check the AST for type errors.
 			var typecheckErrors []error

cgo/libclang.go

@@ -4,9 +4,7 @@ package cgo
 // modification. It does not touch the AST itself.
 
 import (
-	"crypto/sha256"
 	"crypto/sha512"
-	"encoding/hex"
 	"fmt"
 	"go/ast"
 	"go/scanner"
@@ -45,8 +43,6 @@ typedef struct {
 GoCXCursor tinygo_clang_getTranslationUnitCursor(CXTranslationUnit tu);
 unsigned tinygo_clang_visitChildren(GoCXCursor parent, CXCursorVisitor visitor, CXClientData client_data);
 CXString tinygo_clang_getCursorSpelling(GoCXCursor c);
-CXString tinygo_clang_getCursorPrettyPrinted(GoCXCursor c, CXPrintingPolicy Policy);
-CXPrintingPolicy tinygo_clang_getCursorPrintingPolicy(GoCXCursor c);
 enum CXCursorKind tinygo_clang_getCursorKind(GoCXCursor c);
 CXType tinygo_clang_getCursorType(GoCXCursor c);
 GoCXCursor tinygo_clang_getTypeDeclaration(CXType t);
@@ -54,7 +50,6 @@ CXType tinygo_clang_getTypedefDeclUnderlyingType(GoCXCursor c);
 CXType tinygo_clang_getCursorResultType(GoCXCursor c);
 int tinygo_clang_Cursor_getNumArguments(GoCXCursor c);
 GoCXCursor tinygo_clang_Cursor_getArgument(GoCXCursor c, unsigned i);
-enum CX_StorageClass tinygo_clang_Cursor_getStorageClass(GoCXCursor c);
 CXSourceLocation tinygo_clang_getCursorLocation(GoCXCursor c);
 CXSourceRange tinygo_clang_getCursorExtent(GoCXCursor c);
 CXTranslationUnit tinygo_clang_Cursor_getTranslationUnit(GoCXCursor c);
@@ -194,7 +189,7 @@ func (f *cgoFile) readNames(fragment string, cflags []string, filename string, c
 
 // Convert the AST node under the given Clang cursor to a Go AST node and return
 // it.
-func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
+func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, *elaboratedTypeInfo) {
 	kind := C.tinygo_clang_getCursorKind(c)
 	pos := f.getCursorPosition(c)
 	switch kind {
@@ -205,43 +200,19 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 			Kind: ast.Fun,
 			Name: "C." + name,
 		}
-		exportName := name
-		localName := name
-		var stringSignature string
-		if C.tinygo_clang_Cursor_getStorageClass(c) == C.CX_SC_Static {
-			// A static function is assigned a globally unique symbol name based
-			// on the file path (like _Cgo_static_2d09198adbf58f4f4655_foo) and
-			// has a different Go name in the form of C.foo!symbols.go instead
-			// of just C.foo.
-			path := f.importPath + "/" + filepath.Base(f.fset.File(f.file.Pos()).Name())
-			staticIDBuf := sha256.Sum256([]byte(path))
-			staticID := hex.EncodeToString(staticIDBuf[:10])
-			exportName = "_Cgo_static_" + staticID + "_" + name
-			localName = name + "!" + filepath.Base(path)
-
-			// Create a signature. This is necessary for MacOS to forward the
-			// call, because MacOS doesn't support aliases like ELF and PE do.
-			// (There is N_INDR but __attribute__((alias("..."))) doesn't work).
-			policy := C.tinygo_clang_getCursorPrintingPolicy(c)
-			defer C.clang_PrintingPolicy_dispose(policy)
-			C.clang_PrintingPolicy_setProperty(policy, C.CXPrintingPolicy_TerseOutput, 1)
-			stringSignature = getString(C.tinygo_clang_getCursorPrettyPrinted(c, policy))
-			stringSignature = strings.Replace(stringSignature, " "+name+"(", " "+exportName+"(", 1)
-			stringSignature = strings.TrimPrefix(stringSignature, "static ")
-		}
 		args := make([]*ast.Field, numArgs)
 		decl := &ast.FuncDecl{
 			Doc: &ast.CommentGroup{
 				List: []*ast.Comment{
 					{
 						Slash: pos - 1,
-						Text:  "//export " + exportName,
+						Text:  "//export " + name,
 					},
 				},
 			},
 			Name: &ast.Ident{
 				NamePos: pos,
-				Name:    "C." + localName,
+				Name:    "C." + name,
 				Obj:     obj,
 			},
 			Type: &ast.FuncType{
@@ -292,7 +263,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 			}
 		}
 		obj.Decl = decl
-		return decl, stringSignature
+		return decl, nil
 	case C.CXCursor_StructDecl, C.CXCursor_UnionDecl:
 		typ := f.makeASTRecordType(c, pos)
 		typeName := "C." + name

cgo/libclang_stubs.c

@@ -17,14 +17,6 @@ CXString tinygo_clang_getCursorSpelling(CXCursor c) {
 	return clang_getCursorSpelling(c);
 }
 
-CXString tinygo_clang_getCursorPrettyPrinted(CXCursor c, CXPrintingPolicy policy) {
-	return clang_getCursorPrettyPrinted(c, policy);
-}
-
-CXPrintingPolicy tinygo_clang_getCursorPrintingPolicy(CXCursor c) {
-	return clang_getCursorPrintingPolicy(c);
-}
-
 enum CXCursorKind tinygo_clang_getCursorKind(CXCursor c) {
 	return clang_getCursorKind(c);
 }
@@ -53,10 +45,6 @@ CXCursor tinygo_clang_Cursor_getArgument(CXCursor c, unsigned i) {
 	return clang_Cursor_getArgument(c, i);
 }
 
-enum CX_StorageClass tinygo_clang_Cursor_getStorageClass(CXCursor c) {
-	return clang_Cursor_getStorageClass(c);
-}
-
 CXSourceLocation tinygo_clang_getCursorLocation(CXCursor c) {
 	return clang_getCursorLocation(c);
 }

cgo/testdata/symbols.go

@@ -5,7 +5,6 @@ package main
 int foo(int a, int b);
 void variadic0();
 void variadic2(int x, int y, ...);
-static void staticfunc(int x);
 
 // Global variable signatures.
 extern int someValue;
@@ -17,7 +16,6 @@ func accessFunctions() {
 	C.foo(3, 4)
 	C.variadic0()
 	C.variadic2(3, 5)
-	C.staticfunc(3)
 }
 
 func accessGlobals() {

cgo/testdata/symbols.out.go

@@ -55,10 +55,5 @@ func C.variadic2(x C.int, y C.int)
 
 var C.variadic2$funcaddr unsafe.Pointer
 
-//export _Cgo_static_173c95a79b6df1980521_staticfunc
-func C.staticfunc!symbols.go(x C.int)
-
-var C.staticfunc!symbols.go$funcaddr unsafe.Pointer
-
 //go:extern someValue
 var C.someValue C.int

compileopts/config.go

@@ -175,15 +175,6 @@ func (c *Config) AutomaticStackSize() bool {
 	return false
 }
 
-// StackSize returns the default stack size to be used for goroutines, if the
-// stack size could not be determined automatically at compile time.
-func (c *Config) StackSize() uint64 {
-	if c.Options.StackSize != 0 {
-		return c.Options.StackSize
-	}
-	return c.Target.DefaultStackSize
-}
-
 // UseThinLTO returns whether ThinLTO should be used for the given target. Some
 // targets (such as wasm) are not yet supported.
 // We should try and remove as many exceptions as possible in the future, so
@@ -466,14 +457,7 @@ func (c *Config) OpenOCDConfiguration() (args []string, err error) {
 		args = append(args, "-c", cmd)
 	}
 	if c.Target.OpenOCDTransport != "" {
-		transport := c.Target.OpenOCDTransport
-		if transport == "swd" {
-			switch openocdInterface {
-			case "stlink-dap":
-				transport = "dapdirect_swd"
-			}
-		}
-		args = append(args, "-c", "transport select "+transport)
+		args = append(args, "-c", "transport select "+c.Target.OpenOCDTransport)
 	}
 	args = append(args, "-f", "target/"+c.Target.OpenOCDTarget+".cfg")
 	return args, nil

compileopts/options.go

@@ -28,7 +28,6 @@ type Options struct {
 	GC              string
 	PanicStrategy   string
 	Scheduler       string
-	StackSize       uint64 // goroutine stack size (if none could be automatically determined)
 	Serial          string
 	Work            bool // -work flag to print temporary build directory
 	InterpTimeout   time.Duration
@@ -50,8 +49,6 @@ type Options struct {
 	LLVMFeatures    string
 	Directory       string
 	PrintJSON       bool
-	Monitor         bool
-	BaudRate        int
 }
 
 // Verify performs a validation on the given options, raising an error if options are not valid.

compileopts/target.go

@@ -65,7 +65,7 @@ type TargetSpec struct {
 }
 
 // overrideProperties overrides all properties that are set in child into itself using reflection.
-func (spec *TargetSpec) overrideProperties(child *TargetSpec) error {
+func (spec *TargetSpec) overrideProperties(child *TargetSpec) {
 	specType := reflect.TypeOf(spec).Elem()
 	specValue := reflect.ValueOf(spec).Elem()
 	childValue := reflect.ValueOf(child).Elem()
@@ -95,15 +95,14 @@ func (spec *TargetSpec) overrideProperties(child *TargetSpec) error {
 				for j := i + 1; j < dst.Len(); j++ {
 					w := dst.Index(j).String()
 					if v == w {
-						return fmt.Errorf("duplicate value '%s' in field %s", v, field.Name)
+						panic("duplicate value '" + v + "' in field : " + field.Name)
 					}
 				}
 			}
 		default:
-			return fmt.Errorf("unknown field type: %s", kind)
+			panic("unknown field type : " + kind.String())
 		}
 	}
-	return nil
 }
 
 // load reads a target specification from the JSON in the given io.Reader. It
@@ -118,10 +117,10 @@ func (spec *TargetSpec) load(r io.Reader) error {
 }
 
 // loadFromGivenStr loads the TargetSpec from the given string that could be:
-//   - targets/ directory inside the compiler sources
-//   - a relative or absolute path to custom (project specific) target specification .json file;
-//     the Inherits[] could contain the files from target folder (ex. stm32f4disco)
-//     as well as path to custom files (ex. myAwesomeProject.json)
+// - targets/ directory inside the compiler sources
+// - a relative or absolute path to custom (project specific) target specification .json file;
+//   the Inherits[] could contain the files from target folder (ex. stm32f4disco)
+//   as well as path to custom files (ex. myAwesomeProject.json)
 func (spec *TargetSpec) loadFromGivenStr(str string) error {
 	path := ""
 	if strings.HasSuffix(str, ".json") {
@@ -151,17 +150,11 @@ func (spec *TargetSpec) resolveInherits() error {
 		if err != nil {
 			return err
 		}
-		err = newSpec.overrideProperties(subtarget)
-		if err != nil {
-			return err
-		}
+		newSpec.overrideProperties(subtarget)
 	}
 
 	// When all properties are loaded, make sure they are properly inherited.
-	err := newSpec.overrideProperties(spec)
-	if err != nil {
-		return err
-	}
+	newSpec.overrideProperties(spec)
 	*spec = *newSpec
 
 	return nil
@@ -228,7 +221,7 @@ func LoadTarget(options *Options) (*TargetSpec, error) {
 	// it includes all parents as specified in the "inherits" key.
 	err = spec.resolveInherits()
 	if err != nil {
-		return nil, fmt.Errorf("%s : %w", options.Target, err)
+		return nil, err
 	}
 
 	if spec.Scheduler == "asyncify" {

compiler/compiler_test.go

@@ -79,7 +79,7 @@ func TestCompiler(t *testing.T) {
 				RelocationModel:    config.RelocationModel(),
 				Scheduler:          config.Scheduler(),
 				AutomaticStackSize: config.AutomaticStackSize(),
-				DefaultStackSize:   config.StackSize(),
+				DefaultStackSize:   config.Target.DefaultStackSize,
 				NeedsStackObjects:  config.NeedsStackObjects(),
 			}
 			machine, err := NewTargetMachine(compilerConfig)

compiler/symbol.go

@@ -163,20 +163,18 @@ func (c *compilerContext) getFunction(fn *ssa.Function) llvm.Value {
 	// External/exported functions may not retain pointer values.
 	// https://golang.org/cmd/cgo/#hdr-Passing_pointers
 	if info.exported {
-		if c.archFamily() == "wasm32" {
-			// We need to add the wasm-import-module and the wasm-import-name
-			// attributes.
-			module := info.module
-			if module == "" {
-				module = "env"
-			}
-			llvmFn.AddFunctionAttr(c.ctx.CreateStringAttribute("wasm-import-module", module))
+		// Set the wasm-import-module attribute if the function's module is set.
+		if info.module != "" {
 
-			name := info.importName
-			if name == "" {
-				name = info.linkName
+			// We need to add the wasm-import-module and the wasm-import-name
+			wasmImportModuleAttr := c.ctx.CreateStringAttribute("wasm-import-module", info.module)
+			llvmFn.AddFunctionAttr(wasmImportModuleAttr)
+
+			// Add the Wasm Import Name, if we are a named wasm import
+			if info.importName != "" {
+				wasmImportNameAttr := c.ctx.CreateStringAttribute("wasm-import-name", info.importName)
+				llvmFn.AddFunctionAttr(wasmImportNameAttr)
 			}
-			llvmFn.AddFunctionAttr(c.ctx.CreateStringAttribute("wasm-import-name", name))
 		}
 		nocaptureKind := llvm.AttributeKindID("nocapture")
 		nocapture := c.ctx.CreateEnumAttribute(nocaptureKind, 0)

compiler/testdata/pragma.ll

@@ -62,7 +62,7 @@ declare void @main.undefinedFunctionNotInSection(i8*) #0
 
 attributes #0 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
 attributes #1 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="extern_func" "wasm-import-module"="env" "wasm-import-name"="extern_func" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="extern_func" }
 attributes #3 = { inlinehint nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
 attributes #4 = { noinline nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
-attributes #5 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="exportedFunctionInSection" "wasm-import-module"="env" "wasm-import-name"="exportedFunctionInSection" }
+attributes #5 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="exportedFunctionInSection" }

go.mod

@@ -9,10 +9,8 @@ require (
 	github.com/chromedp/chromedp v0.7.6
 	github.com/gofrs/flock v0.8.1
 	github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf
-	github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf
 	github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892
 	github.com/mattn/go-colorable v0.1.8
-	github.com/mattn/go-tty v0.0.4
 	go.bug.st/serial v1.3.5
 	golang.org/x/sys v0.0.0-20220829200755-d48e67d00261
 	golang.org/x/tools v0.1.11

go.sum

@@ -12,6 +12,7 @@ github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moA
 github.com/creack/goselect v0.1.2 h1:2DNy14+JPjRBgPzAd1thbQp4BSIihxcBf0IXhQXDRa0=
 github.com/creack/goselect v0.1.2/go.mod h1:a/NhLweNvqIYMuxcMOuWY516Cimucms3DglDzQP3hKY=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
 github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
 github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
@@ -22,47 +23,44 @@ github.com/gofrs/flock v0.8.1 h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=
 github.com/gofrs/flock v0.8.1/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
 github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf h1:7+FW5aGwISbqUtkfmIpZJGRgNFg2ioYPvFaUxdqpDsg=
 github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf/go.mod h1:RpwtwJQFrIEPstU94h88MWPXP2ektJZ8cZ0YntAmXiE=
-github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf h1:FtEj8sfIcaaBfAKrE1Cwb61YDtYq9JxChK1c7AKce7s=
-github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf/go.mod h1:yrqSXGoD/4EKfF26AOGzscPOgTTJcyAwM2rpixWT+t4=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
 github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
 github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892 h1:6J+qramlHVLmiBOgRiBOnQkno8uprqG6YFFQTt6uYIw=
 github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892/go.mod h1:Pb6XcsXyropB9LNHhnqaknG/vEwYztLkQzVCHv8sQ3M=
-github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
 github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
 github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
-github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
-github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84=
 github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
-github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
-github.com/mattn/go-tty v0.0.4 h1:NVikla9X8MN0SQAqCYzpGyXv0jY7MNl3HOWD2dkle7E=
-github.com/mattn/go-tty v0.0.4/go.mod h1:u5GGXBtZU6RQoKV8gY5W6UhMudbR5vXnUe7j3pxse28=
 github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5 h1:1SoBaSPudixRecmlHXb/GxmaD3fLMtHIDN13QujwQuc=
 github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5/go.mod h1:nZgzbfBr3hhjoZnS66nKrHmduYNpc34ny7RK4z5/HM0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+go.bug.st/serial v1.1.3 h1:YEBxJa9pKS9Wdg46B/jiaKbvvbUrjhZZZITfJHEJhaE=
+go.bug.st/serial v1.1.3/go.mod h1:8TT7u/SwwNIpJ8QaG4s+HTjFt9ReXs2cdOU7ZEk50Dk=
 go.bug.st/serial v1.3.5 h1:k50SqGZCnHZ2MiBQgzccXWG+kd/XpOs1jUljpDDKzaE=
 go.bug.st/serial v1.3.5/go.mod h1:z8CesKorE90Qr/oRSJiEuvzYRKol9r/anJZEb5kt304=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 h1:6zppjxzCulZykYSLyVDYbneBfbaBIQPYMevg0bEwv2s=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200909081042-eff7692f9009/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201207223542-d4d67f95c62d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20211124211545-fe61309f8881/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 h1:XfKQ4OlFl8okEOr5UvAqFRVj8pY/4yfcXrddB8qAbU0=
+golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220829200755-d48e67d00261 h1:v6hYoSR9T5oet+pMXwUWkbiVqx/63mlHjefrHmxwfeY=
 golang.org/x/sys v0.0.0-20220829200755-d48e67d00261/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/tools v0.1.11 h1:loJ25fNOEhSXfHrpoGj91eCUThwdNX6u24rO1xnNteY=
 golang.org/x/tools v0.1.11/go.mod h1:SgwaegtQh8clINPpECJMqnxLv9I09HLqnW3RMqW0CA4=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 tinygo.org/x/go-llvm v0.0.0-20220802112859-5bb0b77907a7 h1:nSLR52mUw7DPQQVA3ZJFH63zjU4ME84fKiin6mdnYWc=
 tinygo.org/x/go-llvm v0.0.0-20220802112859-5bb0b77907a7/go.mod h1:GFbusT2VTA4I+l4j80b17KFK+6whv69Wtny5U+T8RR0=

interp/interpreter.go

@@ -369,11 +369,6 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				nBytes := uint32(operands[3].Uint())
 				dstObj := mem.getWritable(dst.index())
 				dstBuf := dstObj.buffer.asRawValue(r)
-				if mem.get(src.index()).buffer == nil {
-					// Looks like the source buffer is not defined.
-					// This can happen with //extern or //go:embed.
-					return nil, mem, r.errorAt(inst, errUnsupportedRuntimeInst)
-				}
 				srcBuf := mem.get(src.index()).buffer.asRawValue(r)
 				copy(dstBuf.buf[dst.offset():dst.offset()+nBytes], srcBuf.buf[src.offset():])
 				dstObj.buffer = dstBuf

loader/loader.go

@@ -440,7 +440,7 @@ func (p *Package) parseFiles() ([]*ast.File, error) {
 		var initialCFlags []string
 		initialCFlags = append(initialCFlags, p.program.config.CFlags()...)
 		initialCFlags = append(initialCFlags, "-I"+p.Dir)
-		generated, headerCode, cflags, ldflags, accessedFiles, errs := cgo.Process(files, p.program.workingDir, p.ImportPath, p.program.fset, initialCFlags, p.program.clangHeaders)
+		generated, headerCode, cflags, ldflags, accessedFiles, errs := cgo.Process(files, p.program.workingDir, p.program.fset, initialCFlags, p.program.clangHeaders)
 		p.CFlags = append(initialCFlags, cflags...)
 		p.CGoHeaders = headerCode
 		for path, hash := range accessedFiles {

main.go

@@ -26,7 +26,6 @@ import (
 	"time"
 
 	"github.com/google/shlex"
-	"github.com/inhies/go-bytesize"
 	"github.com/mattn/go-colorable"
 	"github.com/tinygo-org/tinygo/builder"
 	"github.com/tinygo-org/tinygo/compileopts"
@@ -244,36 +243,17 @@ func Test(pkgName string, stdout, stderr io.Writer, options *compileopts.Options
 		// Tests are always run in the package directory.
 		cmd.Dir = result.MainDir
 
-		// wasmtime is the default emulator used for `-target=wasi`. wasmtime
-		// is a WebAssembly runtime CLI with WASI enabled by default. However,
-		// only stdio are allowed by default. For example, while STDOUT routes
-		// to the host, other files don't. It also does not inherit environment
-		// variables from the host. Some tests read testdata files, often from
-		// outside the package directory. Other tests require temporary
-		// writeable directories. We allow this by adding wasmtime flags below.
+		// Wasmtime needs a few extra flags to work.
 		if config.EmulatorName() == "wasmtime" {
-			// At this point, The current working directory is at the package
-			// directory. Ex. $GOROOT/src/compress/flate for compress/flate.
-			// buildAndRun has already added arguments for wasmtime, that allow
-			// read-access to files such as "testdata/huffman-zero.in".
-			//
-			// Ex. main(.wasm) --dir=. -- -test.v
-
-			// Below adds additional wasmtime flags in case a test reads files
-			// outside its directory, like "../testdata/e.txt". This allows any
-			// relative directory up to the module root, even if the test never
-			// reads any files.
-			//
-			// Ex. --dir=.. --dir=../.. --dir=../../..
+			// Add directories to the module root, but skip the current working
+			// directory which is already added by buildAndRun.
 			dirs := dirsToModuleRoot(result.MainDir, result.ModuleRoot)
 			var args []string
 			for _, d := range dirs[1:] {
 				args = append(args, "--dir="+d)
 			}
 
-			// Some tests create temp directories using os.MkdirTemp or via
-			// t.TempDir(). Create a writeable directory and map it to the
-			// default tempDir environment variable: TMPDIR.
+			// create a new temp directory just for this run, announce it to os.TempDir() via TMPDIR
 			tmpdir, err := os.MkdirTemp("", "tinygotmp")
 			if err != nil {
 				return fmt.Errorf("failed to create temporary directory: %w", err)
@@ -282,8 +262,7 @@ func Test(pkgName string, stdout, stderr io.Writer, options *compileopts.Options
 			// TODO: add option to not delete temp dir for debugging?
 			defer os.RemoveAll(tmpdir)
 
-			// The below re-organizes the arguments so that the current
-			// directory is added last.
+			// Insert new argments at the front of the command line argments.
 			args = append(args, cmd.Args[1:]...)
 			cmd.Args = append(cmd.Args[:1:1], args...)
 		}
@@ -423,6 +402,7 @@ func Flash(pkgName, port string, options *compileopts.Options) error {
 			if err != nil {
 				return &commandError{"failed to flash", result.Binary, err}
 			}
+			return nil
 		case "msd":
 			switch fileExt {
 			case ".uf2":
@@ -430,11 +410,13 @@ func Flash(pkgName, port string, options *compileopts.Options) error {
 				if err != nil {
 					return &commandError{"failed to flash", result.Binary, err}
 				}
+				return nil
 			case ".hex":
 				err := flashHexUsingMSD(config.Target.FlashVolume, result.Binary, config.Options)
 				if err != nil {
 					return &commandError{"failed to flash", result.Binary, err}
 				}
+				return nil
 			default:
 				return errors.New("mass storage device flashing currently only supports uf2 and hex")
 			}
@@ -455,6 +437,7 @@ func Flash(pkgName, port string, options *compileopts.Options) error {
 			if err != nil {
 				return &commandError{"failed to flash", result.Binary, err}
 			}
+			return nil
 		case "bmp":
 			gdb, err := config.Target.LookupGDB()
 			if err != nil {
@@ -473,13 +456,10 @@ func Flash(pkgName, port string, options *compileopts.Options) error {
 			if err != nil {
 				return &commandError{"failed to flash", result.Binary, err}
 			}
+			return nil
 		default:
 			return fmt.Errorf("unknown flash method: %s", flashMethod)
 		}
-		if options.Monitor {
-			return Monitor("", options)
-		}
-		return nil
 	})
 }
 
@@ -998,8 +978,7 @@ func getDefaultPort(portFlag string, usbInterfaces []string) (port string, err e
 			preferredPortIDs = append(preferredPortIDs, [2]uint16{uint16(vid), uint16(pid)})
 		}
 
-		var primaryPorts []string   // ports picked from preferred USB VID/PID
-		var secondaryPorts []string // other ports (as a fallback)
+		var primaryPorts []string // ports picked from preferred USB VID/PID
 		for _, p := range portsList {
 			if !p.IsUSB {
 				continue
@@ -1021,8 +1000,6 @@ func getDefaultPort(portFlag string, usbInterfaces []string) (port string, err e
 					continue
 				}
 			}
-
-			secondaryPorts = append(secondaryPorts, p.Name)
 		}
 		if len(primaryPorts) == 1 {
 			// There is exactly one match in the set of preferred ports. Use
@@ -1034,10 +1011,18 @@ func getDefaultPort(portFlag string, usbInterfaces []string) (port string, err e
 			// one device of the same type are connected (e.g. two Arduino
 			// Unos).
 			ports = primaryPorts
-		} else {
-			// No preferred ports found. Fall back to other serial ports
-			// available in the system.
-			ports = secondaryPorts
+		}
+
+		if len(ports) == 0 {
+			// fallback
+			switch runtime.GOOS {
+			case "darwin":
+				ports, err = filepath.Glob("/dev/cu.usb*")
+			case "linux":
+				ports, err = filepath.Glob("/dev/ttyACM*")
+			case "windows":
+				ports, err = serial.GetPortsList()
+			}
 		}
 	default:
 		return "", errors.New("unable to search for a default USB device to be flashed on this OS")
@@ -1052,9 +1037,7 @@ func getDefaultPort(portFlag string, usbInterfaces []string) (port string, err e
 	}
 
 	if len(portCandidates) == 0 {
-		if len(usbInterfaces) > 0 {
-			return "", errors.New("unable to search for a default USB device - use -port flag, available ports are " + strings.Join(ports, ", "))
-		} else if len(ports) == 1 {
+		if len(ports) == 1 {
 			return ports[0], nil
 		} else {
 			return "", errors.New("multiple serial ports available - use -port flag, available ports are " + strings.Join(ports, ", "))
@@ -1119,7 +1102,6 @@ func usage(command string) {
 		fmt.Fprintln(os.Stderr, "  flash:   compile and flash to the device")
 		fmt.Fprintln(os.Stderr, "  gdb:     run/flash and immediately enter GDB")
 		fmt.Fprintln(os.Stderr, "  lldb:    run/flash and immediately enter LLDB")
-		fmt.Fprintln(os.Stderr, "  monitor: open communication port")
 		fmt.Fprintln(os.Stderr, "  env:     list environment variables used during build")
 		fmt.Fprintln(os.Stderr, "  list:    run go list using the TinyGo root")
 		fmt.Fprintln(os.Stderr, "  clean:   empty cache directory ("+goenv.Get("GOCACHE")+")")
@@ -1316,12 +1298,6 @@ func main() {
 	var tags buildutil.TagsFlag
 	flag.Var(&tags, "tags", "a space-separated list of extra build tags")
 	target := flag.String("target", "", "chip/board name or JSON target specification file")
-	var stackSize uint64
-	flag.Func("stack-size", "goroutine stack size (if unknown at compile time)", func(s string) error {
-		size, err := bytesize.Parse(s)
-		stackSize = uint64(size)
-		return err
-	})
 	printSize := flag.String("size", "", "print sizes (none, short, full)")
 	printStacks := flag.Bool("print-stacks", false, "print stack sizes of goroutines")
 	printAllocsString := flag.String("print-allocs", "", "regular expression of functions for which heap allocations should be printed")
@@ -1336,8 +1312,6 @@ func main() {
 	wasmAbi := flag.String("wasm-abi", "", "WebAssembly ABI conventions: js (no i64 params) or generic")
 	llvmFeatures := flag.String("llvm-features", "", "comma separated LLVM features to enable")
 	cpuprofile := flag.String("cpuprofile", "", "cpuprofile output")
-	monitor := flag.Bool("monitor", false, "enable serial monitor")
-	baudrate := flag.Int("baudrate", 115200, "baudrate of serial monitor")
 
 	var flagJSON, flagDeps, flagTest bool
 	if command == "help" || command == "list" || command == "info" || command == "build" {
@@ -1404,7 +1378,6 @@ func main() {
 		GOARCH:          goenv.Get("GOARCH"),
 		GOARM:           goenv.Get("GOARM"),
 		Target:          *target,
-		StackSize:       stackSize,
 		Opt:             *opt,
 		GC:              *gc,
 		PanicStrategy:   *panicStrategy,
@@ -1427,8 +1400,6 @@ func main() {
 		OpenOCDCommands: ocdCommands,
 		LLVMFeatures:    *llvmFeatures,
 		PrintJSON:       flagJSON,
-		Monitor:         *monitor,
-		BaudRate:        *baudrate,
 	}
 	if *printCommands {
 		options.PrintCommands = printCommand
@@ -1619,9 +1590,6 @@ func main() {
 			fmt.Println("FAIL")
 			os.Exit(1)
 		}
-	case "monitor":
-		err := Monitor(*port, options)
-		handleCompilerError(err)
 	case "targets":
 		dir := filepath.Join(goenv.Get("TINYGOROOT"), "targets")
 		entries, err := ioutil.ReadDir(dir)

monitor.go

@@ -1,106 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"os"
-	"os/signal"
-	"time"
-
-	"github.com/mattn/go-tty"
-	"github.com/tinygo-org/tinygo/builder"
-	"github.com/tinygo-org/tinygo/compileopts"
-	"go.bug.st/serial"
-)
-
-// Monitor connects to the given port and reads/writes the serial port.
-func Monitor(port string, options *compileopts.Options) error {
-	config, err := builder.NewConfig(options)
-	if err != nil {
-		return err
-	}
-
-	wait := 300
-	for i := 0; i <= wait; i++ {
-		port, err = getDefaultPort(port, config.Target.SerialPort)
-		if err != nil {
-			if i < wait {
-				time.Sleep(10 * time.Millisecond)
-				continue
-			}
-			return err
-		}
-		break
-	}
-
-	br := options.BaudRate
-	if br <= 0 {
-		br = 115200
-	}
-
-	wait = 300
-	var p serial.Port
-	for i := 0; i <= wait; i++ {
-		p, err = serial.Open(port, &serial.Mode{BaudRate: br})
-		if err != nil {
-			if i < wait {
-				time.Sleep(10 * time.Millisecond)
-				continue
-			}
-			return err
-		}
-		break
-	}
-	defer p.Close()
-
-	tty, err := tty.Open()
-	if err != nil {
-		return err
-	}
-	defer tty.Close()
-
-	sig := make(chan os.Signal, 1)
-	signal.Notify(sig, os.Interrupt)
-	defer signal.Stop(sig)
-
-	go func() {
-		<-sig
-		tty.Close()
-		os.Exit(0)
-	}()
-
-	fmt.Printf("Connected to %s. Press Ctrl-C to exit.\n", port)
-
-	errCh := make(chan error, 1)
-
-	go func() {
-		buf := make([]byte, 100*1024)
-		for {
-			n, err := p.Read(buf)
-			if err != nil {
-				errCh <- fmt.Errorf("read error: %w", err)
-				return
-			}
-
-			if n == 0 {
-				continue
-			}
-			fmt.Printf("%v", string(buf[:n]))
-		}
-	}()
-
-	go func() {
-		for {
-			r, err := tty.ReadRune()
-			if err != nil {
-				errCh <- err
-				return
-			}
-			if r == 0 {
-				continue
-			}
-			p.Write([]byte(string(r)))
-		}
-	}()
-
-	return <-errCh
-}

src/crypto/rand/rand_baremetal.go

@@ -1,5 +1,5 @@
-//go:build nrf || stm32 || (sam && atsamd51) || (sam && atsame5x)
-// +build nrf stm32 sam,atsamd51 sam,atsame5x
+//go:build stm32 || (sam && atsamd51) || (sam && atsame5x)
+// +build stm32 sam,atsamd51 sam,atsame5x
 
 package rand
 

src/examples/adc_rp2040/adc.go

@@ -0,0 +1,49 @@
+// Reads multiple rp2040 ADC channels concurrently. Including the internal temperature sensor
+
+package main
+
+import (
+	"fmt"
+	"machine"
+	"time"
+)
+
+type celsius float32
+
+func (c celsius) String() string {
+	return fmt.Sprintf("%4.1f℃", c)
+}
+
+// rp2040 ADC is 12 bits. Reading are shifted <<4 to fill the 16-bit range.
+var adcReading [3]uint16
+
+func readADC(a machine.ADC, w time.Duration, i int) {
+	for {
+		adcReading[i] = a.Get()
+		time.Sleep(w)
+	}
+}
+
+func main() {
+	machine.InitADC()
+	a0 := machine.ADC{machine.ADC0} // GPIO26 input
+	a1 := machine.ADC{machine.ADC1} // GPIO27 input
+	a2 := machine.ADC{machine.ADC2} // GPIO28 input
+	t := machine.ADC_TEMP_SENSOR    // Internal Temperature sensor
+	// Configure sets the GPIOs to PinAnalog mode
+	a0.Configure(machine.ADCConfig{})
+	a1.Configure(machine.ADCConfig{})
+	a2.Configure(machine.ADCConfig{})
+	// Configure powers on the temperature sensor
+	t.Configure(machine.ADCConfig{})
+
+	// Safe to read concurrently
+	go readADC(a0, 10*time.Millisecond, 0)
+	go readADC(a1, 17*time.Millisecond, 1)
+	go readADC(a2, 29*time.Millisecond, 2)
+
+	for {
+		fmt.Printf("ADC0: %5d ADC1: %5d ADC2: %5d Temp: %v\n\r", adcReading[0], adcReading[1], adcReading[2], celsius(float32(t.ReadTemperature())/1000))
+		time.Sleep(1000 * time.Millisecond)
+	}
+}

src/examples/temp/temp.go

@@ -1,23 +0,0 @@
-// Read the internal temperature sensor of the chip.
-
-package main
-
-import (
-	"fmt"
-	"machine"
-	"time"
-)
-
-type celsius float32
-
-func (c celsius) String() string {
-	return fmt.Sprintf("%4.1f℃", c)
-}
-
-func main() {
-	for {
-		temp := celsius(float32(machine.ReadTemperature()) / 1000)
-		println("temperature:", temp.String())
-		time.Sleep(time.Second)
-	}
-}

src/examples/wasm/README.md

@@ -21,14 +21,12 @@ $ tinygo build -o ./wasm.wasm -target wasm ./main/main.go
 This creates a `wasm.wasm` file, which we can load in JavaScript and execute in
 a browser.
 
-Next, choose which example you want to use:
-* [callback](callback): Defines and configures callbacks in Wasm.
-* [export](export): Defines callbacks in Wasm, but configures them in JavaScript.
-* [invoke](invoke): Invokes a function defined in JavaScript from Wasm.
-* [main](main): Prints a message to the JavaScript console from Wasm.
-* [slices](slices): Splits an Array defined in JavaScript from Wasm.
+This examples folder contains two examples that can be built using `make`:
+
+```bash
+$ make export
+```
 
-Let's say you chose [main](main), you'd build it like so:
 ```bash
 $ make main
 ```
@@ -44,8 +42,12 @@ Serving ./html on http://localhost:8080
 
 Use your web browser to visit http://localhost:8080.
 
-* Tip: Open the browser development tools (e.g. Right-click, Inspect in
-  FireFox) to see console output.
+* The wasm "export" example displays a simple math equation using HTML, with
+the result calculated dynamically using WebAssembly.  Changing any of the
+values on the left hand side triggers the exported wasm `update` function to
+recalculate the result.
+* The wasm "main" example uses `println` to write to your browser JavaScript
+console. You may need to open the browser development tools console to see it.
 
 ## How it works
 

src/examples/wasm/callback/wasm.go

@@ -8,12 +8,10 @@ import (
 var a, b int
 
 func main() {
-	wait := make(chan struct{}, 0)
 	document := js.Global().Get("document")
 	document.Call("getElementById", "a").Set("oninput", updater(&a))
 	document.Call("getElementById", "b").Set("oninput", updater(&b))
 	update()
-	<-wait
 }
 
 func updater(n *int) js.Func {

src/internal/task/task_asyncify_wasm.S

@@ -2,16 +2,12 @@
 
 .functype start_unwind (i32) -> ()
 .import_module start_unwind, asyncify
-.import_name start_unwind, start_unwind
 .functype stop_unwind () -> ()
 .import_module stop_unwind, asyncify
-.import_name stop_unwind, stop_unwind
 .functype start_rewind (i32) -> ()
 .import_module start_rewind, asyncify
-.import_name start_rewind, start_rewind
 .functype stop_rewind () -> ()
 .import_module stop_rewind, asyncify
-.import_name stop_rewind, stop_rewind
 
 .global  tinygo_unwind
 .hidden  tinygo_unwind

src/internal/task/task_stack_amd64_windows.S

@@ -1,8 +1,5 @@
 // Windows on amd64 has a slightly different ABI than other (*nix) systems.
 // Therefore, assembly functions need to be tweaked slightly.
-//
-// The calling convention is described here:
-// https://docs.microsoft.com/en-us/cpp/build/x64-calling-convention?view=msvc-170
 
 .section .text.tinygo_startTask,"ax"
 .global  tinygo_startTask
@@ -20,9 +17,8 @@ tinygo_startTask:
     // Branch to the "goroutine start" function.
     callq *%r12
 
-    // After return, exit this goroutine.
-    // This has to be a call, not a jump, to keep the stack correctly aligned.
-    callq tinygo_pause
+    // After return, exit this goroutine. This is a tail call.
+    jmp tinygo_pause
 
 .global tinygo_swapTask
 .section .text.tinygo_swapTask,"ax"
@@ -39,17 +35,6 @@ tinygo_swapTask:
     pushq %rsi
     pushq %rdi
     pushq %rbp
-    sub   $160, %rsp
-    movaps  %xmm6, 144(%rsp)
-    movaps  %xmm7, 128(%rsp)
-    movaps  %xmm8, 112(%rsp)
-    movaps  %xmm9,  96(%rsp)
-    movaps  %xmm10, 80(%rsp)
-    movaps  %xmm11, 64(%rsp)
-    movaps  %xmm12, 48(%rsp)
-    movaps  %xmm13, 32(%rsp)
-    movaps  %xmm14, 16(%rsp)
-    movaps  %xmm15,  0(%rsp)
     pushq %rbx
 
     // Save the current stack pointer in oldStack.
@@ -60,17 +45,6 @@ tinygo_swapTask:
 
     // Load saved register from the new stack.
     popq %rbx
-    movaps 0(%rsp),   %xmm15
-    movaps 16(%rsp),  %xmm14
-    movaps 32(%rsp),  %xmm13
-    movaps 48(%rsp),  %xmm12
-    movaps 64(%rsp),  %xmm11
-    movaps 80(%rsp),  %xmm10
-    movaps 96(%rsp),  %xmm9
-    movaps 112(%rsp), %xmm8
-    movaps 128(%rsp), %xmm7
-    movaps 144(%rsp), %xmm6
-    add   $160, %rsp
     popq %rbp
     popq %rdi
     popq %rsi

src/internal/task/task_stack_amd64_windows.go

@@ -13,34 +13,15 @@ var systemStack uintptr
 // calleeSavedRegs is the list of registers that must be saved and restored when
 // switching between tasks. Also see task_stack_amd64_windows.S that relies on
 // the exact layout of this struct.
-// The calling convention is described here:
-// https://docs.microsoft.com/en-us/cpp/build/x64-calling-convention?view=msvc-170
-// Most importantly, these are the registers we need to save/restore:
-//
-// > The x64 ABI considers registers RBX, RBP, RDI, RSI, RSP, R12, R13, R14,
-// > R15, and XMM6-XMM15 nonvolatile. They must be saved and restored by a
-// > function that uses them.
 type calleeSavedRegs struct {
-	// Note: rbx is placed here so that the stack is correctly aligned when
-	// loading/storing the xmm registers.
-	rbx   uintptr
-	xmm15 [2]uint64
-	xmm14 [2]uint64
-	xmm13 [2]uint64
-	xmm12 [2]uint64
-	xmm11 [2]uint64
-	xmm10 [2]uint64
-	xmm9  [2]uint64
-	xmm8  [2]uint64
-	xmm7  [2]uint64
-	xmm6  [2]uint64
-	rbp   uintptr
-	rdi   uintptr
-	rsi   uintptr
-	r12   uintptr
-	r13   uintptr
-	r14   uintptr
-	r15   uintptr
+	rbx uintptr
+	rbp uintptr
+	rdi uintptr
+	rsi uintptr
+	r12 uintptr
+	r13 uintptr
+	r14 uintptr
+	r15 uintptr
 
 	pc uintptr
 }

src/machine/board_arduino_mkr1000.go

@@ -7,7 +7,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0x07738135
+const RESET_MAGIC_VALUE = 0x07738135
 
 // GPIO Pins
 const (

src/machine/board_arduino_mkrwifi1010.go

@@ -7,7 +7,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0x07738135
+const RESET_MAGIC_VALUE = 0x07738135
 
 // GPIO Pins
 const (

src/machine/board_arduino_nano33.go

@@ -7,7 +7,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0x07738135
+const RESET_MAGIC_VALUE = 0x07738135
 
 // GPIO Pins
 const (

src/machine/board_arduino_zero.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0x07738135
+const RESET_MAGIC_VALUE = 0x07738135
 
 // GPIO Pins - Digital Low
 const (

src/machine/board_atmega328p.go

@@ -12,9 +12,9 @@ const (
 
 const (
 	PB0 = portB + 0
-	PB1 = portB + 1 // peripherals: Timer1 channel A
-	PB2 = portB + 2 // peripherals: Timer1 channel B
-	PB3 = portB + 3 // peripherals: Timer2 channel A
+	PB1 = portB + 1
+	PB2 = portB + 2
+	PB3 = portB + 3
 	PB4 = portB + 4
 	PB5 = portB + 5
 	PB6 = portB + 6
@@ -30,9 +30,9 @@ const (
 	PD0 = portD + 0
 	PD1 = portD + 1
 	PD2 = portD + 2
-	PD3 = portD + 3 // peripherals: Timer2 channel B
+	PD3 = portD + 3
 	PD4 = portD + 4
-	PD5 = portD + 5 // peripherals: Timer0 channel B
-	PD6 = portD + 6 // peripherals: Timer0 channel A
+	PD5 = portD + 5
+	PD6 = portD + 6
 	PD7 = portD + 7
 )

src/machine/board_atsamd21.go

@@ -10,38 +10,38 @@ func CPUFrequency() uint32 {
 
 // Hardware pins
 const (
-	PA00 Pin = 0 // peripherals: TCC2 channel 0
-	PA01 Pin = 1 // peripherals: TCC2 channel 1
+	PA00 Pin = 0
+	PA01 Pin = 1
 	PA02 Pin = 2
 	PA03 Pin = 3
-	PA04 Pin = 4  // peripherals: TCC0 channel 0
-	PA05 Pin = 5  // peripherals: TCC0 channel 1
-	PA06 Pin = 6  // peripherals: TCC1 channel 0
-	PA07 Pin = 7  // peripherals: TCC1 channel 1
-	PA08 Pin = 8  // peripherals: TCC0 channel 0, TCC1 channel 2
-	PA09 Pin = 9  // peripherals: TCC0 channel 1, TCC1 channel 3
-	PA10 Pin = 10 // peripherals: TCC1 channel 0, TCC0 channel 2
-	PA11 Pin = 11 // peripherals: TCC1 channel 1, TCC0 channel 3
-	PA12 Pin = 12 // peripherals: TCC2 channel 0, TCC0 channel 2
-	PA13 Pin = 13 // peripherals: TCC2 channel 1, TCC0 channel 3
-	PA14 Pin = 14 // peripherals: TCC0 channel 0
-	PA15 Pin = 15 // peripherals: TCC0 channel 1
-	PA16 Pin = 16 // peripherals: TCC2 channel 0, TCC0 channel 2
-	PA17 Pin = 17 // peripherals: TCC2 channel 1, TCC0 channel 3
-	PA18 Pin = 18 // peripherals: TCC0 channel 2
-	PA19 Pin = 19 // peripherals: TCC0 channel 3
-	PA20 Pin = 20 // peripherals: TCC0 channel 2
-	PA21 Pin = 21 // peripherals: TCC0 channel 3
-	PA22 Pin = 22 // peripherals: TCC0 channel 0
-	PA23 Pin = 23 // peripherals: TCC0 channel 1
-	PA24 Pin = 24 // peripherals: TCC1 channel 2
-	PA25 Pin = 25 // peripherals: TCC1 channel 3
+	PA04 Pin = 4
+	PA05 Pin = 5
+	PA06 Pin = 6
+	PA07 Pin = 7
+	PA08 Pin = 8
+	PA09 Pin = 9
+	PA10 Pin = 10
+	PA11 Pin = 11
+	PA12 Pin = 12
+	PA13 Pin = 13
+	PA14 Pin = 14
+	PA15 Pin = 15
+	PA16 Pin = 16
+	PA17 Pin = 17
+	PA18 Pin = 18
+	PA19 Pin = 19
+	PA20 Pin = 20
+	PA21 Pin = 21
+	PA22 Pin = 22
+	PA23 Pin = 23
+	PA24 Pin = 24
+	PA25 Pin = 25
 	PA26 Pin = 26
 	PA27 Pin = 27
 	PA28 Pin = 28
 	PA29 Pin = 29
-	PA30 Pin = 30 // peripherals: TCC1 channel 0
-	PA31 Pin = 31 // peripherals: TCC1 channel 1
+	PA30 Pin = 30
+	PA31 Pin = 31
 	PB00 Pin = 32
 	PB01 Pin = 33
 	PB02 Pin = 34
@@ -52,14 +52,14 @@ const (
 	PB07 Pin = 39
 	PB08 Pin = 40
 	PB09 Pin = 41
-	PB10 Pin = 42 // peripherals: TCC0 channel 0
-	PB11 Pin = 43 // peripherals: TCC0 channel 1
-	PB12 Pin = 44 // peripherals: TCC0 channel 2
-	PB13 Pin = 45 // peripherals: TCC0 channel 3
+	PB10 Pin = 42
+	PB11 Pin = 43
+	PB12 Pin = 44
+	PB13 Pin = 45
 	PB14 Pin = 46
 	PB15 Pin = 47
-	PB16 Pin = 48 // peripherals: TCC0 channel 0
-	PB17 Pin = 49 // peripherals: TCC0 channel 1
+	PB16 Pin = 48
+	PB17 Pin = 49
 	PB18 Pin = 50
 	PB19 Pin = 51
 	PB20 Pin = 52
@@ -72,6 +72,6 @@ const (
 	PB27 Pin = 59
 	PB28 Pin = 60
 	PB29 Pin = 61
-	PB30 Pin = 62 // peripherals: TCC0 channel 0, TCC1 channel 2
-	PB31 Pin = 63 // peripherals: TCC0 channel 1, TCC1 channel 3
+	PB30 Pin = 62
+	PB31 Pin = 63
 )

src/machine/board_atsame54-xpro.go

@@ -8,7 +8,7 @@ import (
 )
 
 // Definition for compatibility, but not used
-const resetMagicValue = 0x00000000
+const RESET_MAGIC_VALUE = 0x00000000
 
 const (
 	LED    = PC18

src/machine/board_circuitplay_express.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_feather-m0.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_feather-m4-can.go

@@ -8,7 +8,7 @@ import (
 )
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_feather-m4.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_grandcentral-m4.go

@@ -245,7 +245,7 @@ const (
 
 // Other peripheral constants
 const (
-	resetMagicValue = 0xF01669EF // Used to reset into bootloader
+	RESET_MAGIC_VALUE = 0xF01669EF // Used to reset into bootloader
 )
 
 // USB CDC pins

src/machine/board_itsybitsy-m0.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_itsybitsy-m4.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_matrixportal-m4.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xF01669EF
+const RESET_MAGIC_VALUE = 0xF01669EF
 
 // Digital pins
 const (

src/machine/board_metro-m4-airlift.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_p1am-100.go

@@ -7,7 +7,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0x07738135
+const RESET_MAGIC_VALUE = 0x07738135
 
 // Note: On the P1AM-100, pins D8, D9, D10, A3, and A4 are used for
 // communication with the base controller.

src/machine/board_pybadge.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_pygamer.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_pyportal.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_qtpy.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_qtpy_rp2040.go

@@ -36,9 +36,10 @@ const (
 )
 
 const (
-	NEOPIXEL       = GPIO12
-	WS2812         = GPIO12
-	NEOPIXEL_POWER = GPIO11
+	NEOPIXELS       = GPIO12
+	WS2812          = GPIO12
+	NEOPIXELS_POWER = GPIO11
+	LED             = GPIO20
 )
 
 // I2C Pins.
@@ -115,5 +116,5 @@ const (
 
 var (
 	usb_VID uint16 = 0x239A
-	usb_PID uint16 = 0x80F7
+	usb_PID uint16 = 0x80F1
 )

src/machine/board_trinket.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/board_wioterminal.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 const (
 	ADC0 = A0

src/machine/board_xiao-ble.go

@@ -104,7 +104,7 @@ const (
 
 var (
 	usb_VID uint16 = 0x2886
-	usb_PID uint16 = 0x8045
+	usb_PID uint16 = 0x0045
 )
 
 var (

src/machine/board_xiao.go

@@ -4,7 +4,7 @@
 package machine
 
 // used to reset into bootloader
-const resetMagicValue = 0xf01669ef
+const RESET_MAGIC_VALUE = 0xf01669ef
 
 // GPIO Pins
 const (

src/machine/i2c.go

@@ -8,8 +8,6 @@ import (
 )
 
 // TWI_FREQ is the I2C bus speed. Normally either 100 kHz, or 400 kHz for high-speed bus.
-//
-// Deprecated: use 100 * machine.KHz or 400 * machine.KHz instead.
 const (
 	TWI_FREQ_100KHZ = 100000
 	TWI_FREQ_400KHZ = 400000

src/machine/machine.go

@@ -18,13 +18,6 @@ var (
 // particular chip but instead runs in WebAssembly for example.
 const Device = deviceName
 
-// Generic constants.
-const (
-	KHz = 1000
-	MHz = 1000_000
-	GHz = 1000_000_000
-)
-
 // PinMode sets the direction and pull mode of the pin. For example, PinOutput
 // sets the pin as an output and PinInputPullup sets the pin as an input with a
 // pull-up.

src/machine/machine_atmega.go

@@ -26,7 +26,7 @@ type I2CConfig struct {
 func (i2c *I2C) Configure(config I2CConfig) error {
 	// Default I2C bus speed is 100 kHz.
 	if config.Frequency == 0 {
-		config.Frequency = 100 * KHz
+		config.Frequency = TWI_FREQ_100KHZ
 	}
 
 	// Activate internal pullups for twi.

src/machine/machine_atmega1280.go

@@ -38,10 +38,10 @@ const (
 	PB1 = portB + 1
 	PB2 = portB + 2
 	PB3 = portB + 3
-	PB4 = portB + 4 // peripherals: Timer2 channel A
-	PB5 = portB + 5 // peripherals: Timer1 channel A
-	PB6 = portB + 6 // peripherals: Timer1 channel B
-	PB7 = portB + 7 // peripherals: Timer0 channel A
+	PB4 = portB + 4
+	PB5 = portB + 5
+	PB6 = portB + 6
+	PB7 = portB + 7
 	PC0 = portC + 0
 	PC1 = portC + 1
 	PC2 = portC + 2
@@ -57,9 +57,9 @@ const (
 	PD7 = portD + 7
 	PE0 = portE + 0
 	PE1 = portE + 1
-	PE3 = portE + 3 // peripherals: Timer3 channel A
-	PE4 = portE + 4 // peripherals: Timer3 channel B
-	PE5 = portE + 5 // peripherals: Timer3 channel C
+	PE3 = portE + 3
+	PE4 = portE + 4
+	PE5 = portE + 5
 	PE6 = portE + 6
 	PF0 = portF + 0
 	PF1 = portF + 1
@@ -72,13 +72,13 @@ const (
 	PG0 = portG + 0
 	PG1 = portG + 1
 	PG2 = portG + 2
-	PG5 = portG + 5 // peripherals: Timer0 channel B
+	PG5 = portG + 5
 	PH0 = portH + 0
 	PH1 = portH + 1
-	PH3 = portH + 3 // peripherals: Timer4 channel A
-	PH4 = portH + 4 // peripherals: Timer4 channel B
-	PH5 = portH + 5 // peripherals: Timer4 channel C
-	PH6 = portH + 6 // peripherals: Timer0 channel B
+	PH3 = portH + 3
+	PH4 = portH + 4
+	PH5 = portH + 5
+	PH6 = portH + 6
 	PJ0 = portJ + 0
 	PJ1 = portJ + 1
 	PK0 = portK + 0
@@ -92,9 +92,9 @@ const (
 	PL0 = portL + 0
 	PL1 = portL + 1
 	PL2 = portL + 2
-	PL3 = portL + 3 // peripherals: Timer5 channel A
-	PL4 = portL + 4 // peripherals: Timer5 channel B
-	PL5 = portL + 5 // peripherals: Timer5 channel C
+	PL3 = portL + 3
+	PL4 = portL + 4
+	PL5 = portL + 5
 	PL6 = portL + 6
 	PL7 = portL + 7
 )

src/machine/machine_atsamd21.go

@@ -10,6 +10,7 @@ package machine
 import (
 	"device/arm"
 	"device/sam"
+	"errors"
 	"runtime/interrupt"
 	"unsafe"
 )
@@ -676,7 +677,7 @@ const i2cTimeout = 1000
 func (i2c *I2C) Configure(config I2CConfig) error {
 	// Default I2C bus speed is 100 kHz.
 	if config.Frequency == 0 {
-		config.Frequency = 100 * KHz
+		config.Frequency = TWI_FREQ_100KHZ
 	}
 	if config.SDA == 0 && config.SCL == 0 {
 		config.SDA = SDA_PIN
@@ -1273,6 +1274,10 @@ func (spi SPI) Transfer(w byte) (byte, error) {
 	return byte(spi.Bus.DATA.Get()), nil
 }
 
+var (
+	ErrTxInvalidSliceSize = errors.New("SPI write and read slices must be same size")
+)
+
 // Tx handles read/write operation for SPI interface. Since SPI is a syncronous write/read
 // interface, there must always be the same number of bytes written as bytes read.
 // The Tx method knows about this, and offers a few different ways of calling it.
@@ -1735,7 +1740,7 @@ func EnterBootloader() {
 
 	// Perform magic reset into bootloader, as mentioned in
 	// https://github.com/arduino/ArduinoCore-samd/issues/197
-	*(*uint32)(unsafe.Pointer(uintptr(0x20007FFC))) = resetMagicValue
+	*(*uint32)(unsafe.Pointer(uintptr(0x20007FFC))) = RESET_MAGIC_VALUE
 
 	arm.SystemReset()
 }

src/machine/machine_atsamd51.go

@@ -10,6 +10,7 @@ package machine
 import (
 	"device/arm"
 	"device/sam"
+	"errors"
 	"runtime/interrupt"
 	"unsafe"
 )
@@ -77,86 +78,86 @@ const (
 	PA05 Pin = 5
 	PA06 Pin = 6
 	PA07 Pin = 7
-	PA08 Pin = 8  // peripherals: TCC0 channel 0, TCC1 channel 4
-	PA09 Pin = 9  // peripherals: TCC0 channel 1, TCC1 channel 5
-	PA10 Pin = 10 // peripherals: TCC0 channel 2, TCC1 channel 6
-	PA11 Pin = 11 // peripherals: TCC0 channel 3, TCC1 channel 7
-	PA12 Pin = 12 // peripherals: TCC0 channel 6, TCC1 channel 2
-	PA13 Pin = 13 // peripherals: TCC0 channel 7, TCC1 channel 3
-	PA14 Pin = 14 // peripherals: TCC2 channel 0, TCC1 channel 2
-	PA15 Pin = 15 // peripherals: TCC2 channel 1, TCC1 channel 3
-	PA16 Pin = 16 // peripherals: TCC1 channel 0, TCC0 channel 4
-	PA17 Pin = 17 // peripherals: TCC1 channel 1, TCC0 channel 5
-	PA18 Pin = 18 // peripherals: TCC1 channel 2, TCC0 channel 6
-	PA19 Pin = 19 // peripherals: TCC1 channel 3, TCC0 channel 7
-	PA20 Pin = 20 // peripherals: TCC1 channel 4, TCC0 channel 0
-	PA21 Pin = 21 // peripherals: TCC1 channel 5, TCC0 channel 1
-	PA22 Pin = 22 // peripherals: TCC1 channel 6, TCC0 channel 2
-	PA23 Pin = 23 // peripherals: TCC1 channel 7, TCC0 channel 3
-	PA24 Pin = 24 // peripherals: TCC2 channel 2
-	PA25 Pin = 25 // peripherals: TCC2 channel 3
+	PA08 Pin = 8
+	PA09 Pin = 9
+	PA10 Pin = 10
+	PA11 Pin = 11
+	PA12 Pin = 12
+	PA13 Pin = 13
+	PA14 Pin = 14
+	PA15 Pin = 15
+	PA16 Pin = 16
+	PA17 Pin = 17
+	PA18 Pin = 18
+	PA19 Pin = 19
+	PA20 Pin = 20
+	PA21 Pin = 21
+	PA22 Pin = 22
+	PA23 Pin = 23
+	PA24 Pin = 24
+	PA25 Pin = 25
 	PA26 Pin = 26
 	PA27 Pin = 27
 	PA28 Pin = 28
 	PA29 Pin = 29
-	PA30 Pin = 30 // peripherals: TCC2 channel 0
-	PA31 Pin = 31 // peripherals: TCC2 channel 1
+	PA30 Pin = 30
+	PA31 Pin = 31
 	PB00 Pin = 32
 	PB01 Pin = 33
-	PB02 Pin = 34 // peripherals: TCC2 channel 2
-	PB03 Pin = 35 // peripherals: TCC2 channel 3
+	PB02 Pin = 34
+	PB03 Pin = 35
 	PB04 Pin = 36
 	PB05 Pin = 37
 	PB06 Pin = 38
 	PB07 Pin = 39
 	PB08 Pin = 40
 	PB09 Pin = 41
-	PB10 Pin = 42 // peripherals: TCC0 channel 4, TCC1 channel 0
-	PB11 Pin = 43 // peripherals: TCC0 channel 5, TCC1 channel 1
-	PB12 Pin = 44 // peripherals: TCC3 channel 0, TCC0 channel 0
-	PB13 Pin = 45 // peripherals: TCC3 channel 1, TCC0 channel 1
-	PB14 Pin = 46 // peripherals: TCC4 channel 0, TCC0 channel 2
-	PB15 Pin = 47 // peripherals: TCC4 channel 1, TCC0 channel 3
-	PB16 Pin = 48 // peripherals: TCC3 channel 0, TCC0 channel 4
-	PB17 Pin = 49 // peripherals: TCC3 channel 1, TCC0 channel 5
-	PB18 Pin = 50 // peripherals: TCC1 channel 0
-	PB19 Pin = 51 // peripherals: TCC1 channel 1
-	PB20 Pin = 52 // peripherals: TCC1 channel 2
-	PB21 Pin = 53 // peripherals: TCC1 channel 3
+	PB10 Pin = 42
+	PB11 Pin = 43
+	PB12 Pin = 44
+	PB13 Pin = 45
+	PB14 Pin = 46
+	PB15 Pin = 47
+	PB16 Pin = 48
+	PB17 Pin = 49
+	PB18 Pin = 50
+	PB19 Pin = 51
+	PB20 Pin = 52
+	PB21 Pin = 53
 	PB22 Pin = 54
 	PB23 Pin = 55
 	PB24 Pin = 56
 	PB25 Pin = 57
-	PB26 Pin = 58 // peripherals: TCC1 channel 2
-	PB27 Pin = 59 // peripherals: TCC1 channel 3
-	PB28 Pin = 60 // peripherals: TCC1 channel 4
-	PB29 Pin = 61 // peripherals: TCC1 channel 5
-	PB30 Pin = 62 // peripherals: TCC4 channel 0, TCC0 channel 6
-	PB31 Pin = 63 // peripherals: TCC4 channel 1, TCC0 channel 7
+	PB26 Pin = 58
+	PB27 Pin = 59
+	PB28 Pin = 60
+	PB29 Pin = 61
+	PB30 Pin = 62
+	PB31 Pin = 63
 	PC00 Pin = 64
 	PC01 Pin = 65
 	PC02 Pin = 66
 	PC03 Pin = 67
-	PC04 Pin = 68 // peripherals: TCC0 channel 0
-	PC05 Pin = 69 // peripherals: TCC0 channel 1
+	PC04 Pin = 68
+	PC05 Pin = 69
 	PC06 Pin = 70
 	PC07 Pin = 71
 	PC08 Pin = 72
 	PC09 Pin = 73
-	PC10 Pin = 74 // peripherals: TCC0 channel 0, TCC1 channel 4
-	PC11 Pin = 75 // peripherals: TCC0 channel 1, TCC1 channel 5
-	PC12 Pin = 76 // peripherals: TCC0 channel 2, TCC1 channel 6
-	PC13 Pin = 77 // peripherals: TCC0 channel 3, TCC1 channel 7
-	PC14 Pin = 78 // peripherals: TCC0 channel 4, TCC1 channel 0
-	PC15 Pin = 79 // peripherals: TCC0 channel 5, TCC1 channel 1
-	PC16 Pin = 80 // peripherals: TCC0 channel 0
-	PC17 Pin = 81 // peripherals: TCC0 channel 1
-	PC18 Pin = 82 // peripherals: TCC0 channel 2
-	PC19 Pin = 83 // peripherals: TCC0 channel 3
-	PC20 Pin = 84 // peripherals: TCC0 channel 4
-	PC21 Pin = 85 // peripherals: TCC0 channel 5
-	PC22 Pin = 86 // peripherals: TCC0 channel 6
-	PC23 Pin = 87 // peripherals: TCC0 channel 7
+	PC10 Pin = 74
+	PC11 Pin = 75
+	PC12 Pin = 76
+	PC13 Pin = 77
+	PC14 Pin = 78
+	PC15 Pin = 79
+	PC16 Pin = 80
+	PC17 Pin = 81
+	PC18 Pin = 82
+	PC19 Pin = 83
+	PC20 Pin = 84
+	PC21 Pin = 85
+	PC22 Pin = 86
+	PC23 Pin = 87
 	PC24 Pin = 88
 	PC25 Pin = 89
 	PC26 Pin = 90
@@ -173,20 +174,20 @@ const (
 	PD05 Pin = 101
 	PD06 Pin = 102
 	PD07 Pin = 103
-	PD08 Pin = 104 // peripherals: TCC0 channel 1
-	PD09 Pin = 105 // peripherals: TCC0 channel 2
-	PD10 Pin = 106 // peripherals: TCC0 channel 3
-	PD11 Pin = 107 // peripherals: TCC0 channel 4
-	PD12 Pin = 108 // peripherals: TCC0 channel 5
-	PD13 Pin = 109 // peripherals: TCC0 channel 6
+	PD08 Pin = 104
+	PD09 Pin = 105
+	PD10 Pin = 106
+	PD11 Pin = 107
+	PD12 Pin = 108
+	PD13 Pin = 109
 	PD14 Pin = 110
 	PD15 Pin = 111
 	PD16 Pin = 112
 	PD17 Pin = 113
 	PD18 Pin = 114
 	PD19 Pin = 115
-	PD20 Pin = 116 // peripherals: TCC1 channel 0
-	PD21 Pin = 117 // peripherals: TCC1 channel 1
+	PD20 Pin = 116
+	PD21 Pin = 117
 	PD22 Pin = 118
 	PD23 Pin = 119
 	PD24 Pin = 120
@@ -1150,7 +1151,7 @@ const i2cTimeout = 1000
 func (i2c *I2C) Configure(config I2CConfig) error {
 	// Default I2C bus speed is 100 kHz.
 	if config.Frequency == 0 {
-		config.Frequency = 100 * KHz
+		config.Frequency = TWI_FREQ_100KHZ
 	}
 
 	// Use default I2C pins if not set.
@@ -1526,6 +1527,10 @@ func (spi SPI) Transfer(w byte) (byte, error) {
 	return byte(spi.Bus.DATA.Get()), nil
 }
 
+var (
+	ErrTxInvalidSliceSize = errors.New("SPI write and read slices must be same size")
+)
+
 // Tx handles read/write operation for SPI interface. Since SPI is a syncronous write/read
 // interface, there must always be the same number of bytes written as bytes read.
 // The Tx method knows about this, and offers a few different ways of calling it.
@@ -1975,7 +1980,7 @@ func EnterBootloader() {
 
 	// Perform magic reset into bootloader, as mentioned in
 	// https://github.com/arduino/ArduinoCore-samd/issues/197
-	*(*uint32)(unsafe.Pointer(uintptr(0x20000000 + HSRAM_SIZE - 4))) = resetMagicValue
+	*(*uint32)(unsafe.Pointer(uintptr(0x20000000 + HSRAM_SIZE - 4))) = RESET_MAGIC_VALUE
 
 	arm.SystemReset()
 }

src/machine/machine_esp32c3.go

@@ -59,9 +59,12 @@ type PinChange uint8
 
 // Pin change interrupt constants for SetInterrupt.
 const (
-	PinRising PinChange = iota + 1
+	PinNoInterrupt PinChange = iota
+	PinRising
 	PinFalling
 	PinToggle
+	PinLowLevel
+	PinHighLevel
 )
 
 // Configure this pin with the given configuration.
@@ -187,7 +190,7 @@ func (p Pin) SetInterrupt(change PinChange, callback func(Pin)) (err error) {
 		return ErrInvalidInputPin
 	}
 
-	if callback == nil {
+	if callback == nil || change == PinNoInterrupt {
 		// Disable this pin interrupt
 		p.pin().ClearBits(esp.GPIO_PIN_PIN_INT_TYPE_Msk | esp.GPIO_PIN_PIN_INT_ENA_Msk)
 
@@ -261,6 +264,15 @@ type UART struct {
 	DataOverflowDetected bool // set when data overflow detected in UART FIFO buffer or RingBuffer
 }
 
+type UARTStopBits int
+
+const (
+	UARTStopBits_Default UARTStopBits = iota
+	UARTStopBits_1
+	UARTStopBits_1_5
+	UARTStopBits_2
+)
+
 const (
 	defaultDataBits = 8
 	defaultStopBit  = 1

src/machine/machine_fe310.go

@@ -231,7 +231,7 @@ type I2CConfig struct {
 func (i2c *I2C) Configure(config I2CConfig) error {
 	var i2cClockFrequency uint32 = 32000000
 	if config.Frequency == 0 {
-		config.Frequency = 100 * KHz
+		config.Frequency = TWI_FREQ_100KHZ
 	}
 
 	if config.SDA == 0 && config.SCL == 0 {

src/machine/machine_k210.go

@@ -23,17 +23,11 @@ type PinChange uint8
 // Pin modes.
 const (
 	PinInput PinMode = iota
-	PinInputPullup
-	PinInputPulldown
+	PinInputPullUp
+	PinInputPullDown
 	PinOutput
 )
 
-// Deprecated: use PinInputPullup and PinInputPulldown instead.
-const (
-	PinInputPullUp   = PinInputPullup
-	PinInputPullDown = PinInputPulldown
-)
-
 // FPIOA internal pull resistors.
 const (
 	fpioaPullNone fpioaPullMode = iota
@@ -95,10 +89,10 @@ func (p Pin) Configure(config PinConfig) {
 	case PinInput:
 		p.setFPIOAIOPull(fpioaPullNone)
 		input = true
-	case PinInputPullup:
+	case PinInputPullUp:
 		p.setFPIOAIOPull(fpioaPullUp)
 		input = true
-	case PinInputPulldown:
+	case PinInputPullDown:
 		p.setFPIOAIOPull(fpioaPullDown)
 		input = true
 	case PinOutput:
@@ -523,7 +517,7 @@ type I2CConfig struct {
 func (i2c *I2C) Configure(config I2CConfig) error {
 
 	if config.Frequency == 0 {
-		config.Frequency = 100 * KHz
+		config.Frequency = TWI_FREQ_100KHZ
 	}
 
 	if config.SDA == 0 && config.SCL == 0 {

src/machine/machine_mimxrt1062.go

@@ -21,8 +21,8 @@ func CPUFrequency() uint32 {
 const (
 	// GPIO
 	PinInput PinMode = iota
-	PinInputPullup
-	PinInputPulldown
+	PinInputPullUp
+	PinInputPullDown
 	PinOutput
 	PinOutputOpenDrain
 	PinDisable
@@ -45,16 +45,12 @@ const (
 	PinModeI2CSCL
 )
 
-// Deprecated: use PinInputPullup and PinInputPulldown instead.
-const (
-	PinInputPullUp   = PinInputPullup
-	PinInputPullDown = PinInputPulldown
-)
-
 type PinChange uint8
 
 const (
-	PinRising PinChange = iota + 2
+	PinLow PinChange = iota
+	PinHigh
+	PinRising
 	PinFalling
 	PinToggle
 )
@@ -263,11 +259,11 @@ func (p Pin) Configure(config PinConfig) {
 		gpio.GDIR.ClearBits(p.getMask())
 		pad.Set(dse(7))
 
-	case PinInputPullup:
+	case PinInputPullUp:
 		gpio.GDIR.ClearBits(p.getMask())
 		pad.Set(dse(7) | pke | pue | pup(3) | hys)
 
-	case PinInputPulldown:
+	case PinInputPullDown:
 		gpio.GDIR.ClearBits(p.getMask())
 		pad.Set(dse(7) | pke | pue | hys)
 
@@ -391,7 +387,7 @@ func (p Pin) SetInterrupt(change PinChange, callback func(Pin)) error {
 	mask := p.getMask()
 	if nil != callback {
 		switch change {
-		case PinRising, PinFalling:
+		case PinLow, PinHigh, PinRising, PinFalling:
 			gpio.EDGE_SEL.ClearBits(mask)
 			var reg *volatile.Register32
 			var pos uint8
@@ -750,7 +746,7 @@ func (p Pin) getMuxMode(config PinConfig) uint32 {
 	switch config.Mode {
 
 	// GPIO
-	case PinInput, PinInputPullup, PinInputPulldown,
+	case PinInput, PinInputPullUp, PinInputPullDown,
 		PinOutput, PinOutputOpenDrain, PinDisable:
 		mode := uint32(0x5) // GPIO is always alternate function 5
 		if forcePath {

src/machine/machine_mimxrt1062_i2c.go

@@ -10,6 +10,15 @@ import (
 	"errors"
 )
 
+const (
+	TWI_FREQ_BUS     = 24000000        // LPI2C root clock is on 24 MHz OSC
+	TWI_FREQ_100KHZ  = 100000          // StandardMode (100 kHz)
+	TWI_FREQ_400KHZ  = 400000          // FastMode (400 kHz)
+	TWI_FREQ_1MHZ    = 1000000         // FastModePlus (1 MHz)
+	TWI_FREQ_5MHZ    = 5000000         // UltraFastMode (5 MHz)
+	TWI_FREQ_DEFAULT = TWI_FREQ_100KHZ // default to StandardMode (100 kHz)
+)
+
 var (
 	errI2CWriteTimeout       = errors.New("I2C timeout during write")
 	errI2CReadTimeout        = errors.New("I2C timeout during read")
@@ -165,7 +174,7 @@ func (i2c *I2C) Configure(config I2CConfig) {
 
 	freq := config.Frequency
 	if 0 == freq {
-		freq = 100 * KHz
+		freq = TWI_FREQ_DEFAULT
 	}
 
 	// reset clock and registers, and enable LPI2C module interface
@@ -296,7 +305,7 @@ func (i2c *I2C) setFrequency(freq uint32) {
 	wasEnabled := i2c.Bus.MCR.HasBits(nxp.LPI2C_MCR_MEN)
 	i2c.Bus.MCR.ClearBits(nxp.LPI2C_MCR_MEN)
 
-	// baud rate = (24MHz/(2^pre))/(CLKLO+1 + CLKHI+1 + FLOOR((2+FILTSCL)/(2^pre)))
+	// baud rate = (TWI_FREQ_BUS/(2^pre))/(CLKLO+1 + CLKHI+1 + FLOOR((2+FILTSCL)/(2^pre)))
 	// assume: CLKLO=2*CLKHI, SETHOLD=CLKHI, DATAVD=CLKHI/2
 	for pre := uint32(1); pre <= 128; pre *= 2 {
 		if bestError == 0 {
@@ -305,9 +314,9 @@ func (i2c *I2C) setFrequency(freq uint32) {
 		for clkHi := uint32(1); clkHi < 32; clkHi++ {
 			var absError, rate uint32
 			if clkHi == 1 {
-				rate = (24 * MHz / pre) / (1 + 3 + 2 + 2/pre)
+				rate = (TWI_FREQ_BUS / pre) / (1 + 3 + 2 + 2/pre)
 			} else {
-				rate = (24 * MHz / pre) / (3*clkHi + 2 + 2/pre)
+				rate = (TWI_FREQ_BUS / pre) / (3*clkHi + 2 + 2/pre)
 			}
 			if freq > rate {
 				absError = freq - rate
@@ -361,15 +370,15 @@ func (i2c *I2C) setFrequency(freq uint32) {
 		mcfgr2, mcfgr3 uint32
 	)
 	const i2cClockStretchTimeout = 15000 // microseconds
-	if freq >= 5*MHz {
+	if freq >= TWI_FREQ_5MHZ {
 		// I2C UltraFastMode 5 MHz
 		mcfgr2 = 0 // disable glitch filters and timeout for UltraFastMode
 		mcfgr3 = 0 //
-	} else if freq >= 1*MHz {
+	} else if freq >= TWI_FREQ_1MHZ {
 		// I2C FastModePlus 1 MHz
 		mcfgr2 = filtsda(1) | filtscl(1) | busidle(2400) // 100us timeout
 		mcfgr3 = pinlow(i2cClockStretchTimeout*24/256 + 1)
-	} else if freq >= 400*KHz {
+	} else if freq >= TWI_FREQ_400KHZ {
 		// I2C FastMode 400 kHz
 		mcfgr2 = filtsda(2) | filtscl(2) | busidle(3600) // 150us timeout
 		mcfgr3 = pinlow(i2cClockStretchTimeout*24/256 + 1)

src/machine/machine_mimxrt1062_uart.go

@@ -159,8 +159,8 @@ func (uart *UART) Disable() {
 		uart.Bus.CTRL.ClearBits(nxp.LPUART_CTRL_TE | nxp.LPUART_CTRL_RE)
 
 		// put pins back into GPIO mode
-		uart.rx.Configure(PinConfig{Mode: PinInputPullup})
-		uart.tx.Configure(PinConfig{Mode: PinInputPullup})
+		uart.rx.Configure(PinConfig{Mode: PinInputPullUp})
+		uart.tx.Configure(PinConfig{Mode: PinInputPullUp})
 	}
 	uart.configured = false
 }

src/machine/machine_nrf.go

@@ -5,10 +5,15 @@ package machine
 
 import (
 	"device/nrf"
+	"errors"
 	"runtime/interrupt"
 	"unsafe"
 )
 
+var (
+	ErrTxInvalidSliceSize = errors.New("SPI write and read slices must be same size")
+)
+
 const deviceName = nrf.Device
 
 const (
@@ -225,7 +230,7 @@ func (i2c *I2C) Configure(config I2CConfig) error {
 
 	// Default I2C bus speed is 100 kHz.
 	if config.Frequency == 0 {
-		config.Frequency = 100 * KHz
+		config.Frequency = TWI_FREQ_100KHZ
 	}
 	// Default I2C pins if not set.
 	if config.SDA == 0 && config.SCL == 0 {
@@ -248,7 +253,7 @@ func (i2c *I2C) Configure(config I2CConfig) error {
 		(nrf.GPIO_PIN_CNF_DRIVE_S0D1 << nrf.GPIO_PIN_CNF_DRIVE_Pos) |
 		(nrf.GPIO_PIN_CNF_SENSE_Disabled << nrf.GPIO_PIN_CNF_SENSE_Pos))
 
-	if config.Frequency >= 400*KHz {
+	if config.Frequency == TWI_FREQ_400KHZ {
 		i2c.Bus.FREQUENCY.Set(nrf.TWI_FREQUENCY_FREQUENCY_K400)
 	} else {
 		i2c.Bus.FREQUENCY.Set(nrf.TWI_FREQUENCY_FREQUENCY_K100)
@@ -345,41 +350,3 @@ func (i2c *I2C) readByte() (byte, error) {
 	i2c.Bus.EVENTS_RXDREADY.Set(0)
 	return byte(i2c.Bus.RXD.Get()), nil
 }
-
-var rngStarted = false
-
-// GetRNG returns 32 bits of non-deterministic random data based on internal thermal noise.
-// According to Nordic's documentation, the random output is suitable for cryptographic purposes.
-func GetRNG() (ret uint32, err error) {
-	// There's no apparent way to check the status of the RNG peripheral's task, so simply start it
-	// to avoid deadlocking while waiting for output.
-	if !rngStarted {
-		nrf.RNG.TASKS_START.Set(1)
-		nrf.RNG.SetCONFIG_DERCEN(nrf.RNG_CONFIG_DERCEN_Enabled)
-		rngStarted = true
-	}
-
-	// The RNG returns one byte at a time, so stack up four bytes into a single uint32 for return.
-	for i := 0; i < 4; i++ {
-		// Wait for data to be ready.
-		for nrf.RNG.EVENTS_VALRDY.Get() == 0 {
-		}
-		// Append random byte to output.
-		ret = (ret << 8) ^ nrf.RNG.GetVALUE()
-		// Unset the EVENTS_VALRDY register to avoid reading the same random output twice.
-		nrf.RNG.EVENTS_VALRDY.Set(0)
-	}
-
-	return ret, nil
-}
-
-// ReadTemperature reads the silicon die temperature of the chip. The return
-// value is in milli-celsius.
-func ReadTemperature() int32 {
-	nrf.TEMP.TASKS_START.Set(1)
-	for nrf.TEMP.EVENTS_DATARDY.Get() == 0 {
-	}
-	temp := int32(nrf.TEMP.TEMP.Get()) * 250 // the returned value is in units of 0.25°C
-	nrf.TEMP.EVENTS_DATARDY.Set(0)
-	return temp
-}

src/machine/machine_nrf52840_enter_bootloader.go

@@ -9,16 +9,16 @@ import (
 )
 
 const (
-	dfuMagicSerialOnlyReset = 0x4e
-	dfuMagicUF2Reset        = 0x57
-	dfuMagicOTAReset        = 0xA8
+	DFU_MAGIC_SERIAL_ONLY_RESET = 0x4e
+	DFU_MAGIC_UF2_RESET         = 0x57
+	DFU_MAGIC_OTA_RESET         = 0xA8
 )
 
 // EnterSerialBootloader resets the chip into the serial bootloader. After
 // reset, it can be flashed using serial/nrfutil.
 func EnterSerialBootloader() {
 	arm.DisableInterrupts()
-	nrf.POWER.GPREGRET.Set(dfuMagicSerialOnlyReset)
+	nrf.POWER.GPREGRET.Set(DFU_MAGIC_SERIAL_ONLY_RESET)
 	arm.SystemReset()
 }
 
@@ -26,7 +26,7 @@ func EnterSerialBootloader() {
 // can be flashed via nrfutil or by copying a UF2 file to the mass storage device
 func EnterUF2Bootloader() {
 	arm.DisableInterrupts()
-	nrf.POWER.GPREGRET.Set(dfuMagicUF2Reset)
+	nrf.POWER.GPREGRET.Set(DFU_MAGIC_UF2_RESET)
 	arm.SystemReset()
 }
 
@@ -34,6 +34,6 @@ func EnterUF2Bootloader() {
 // flashed via an OTA update
 func EnterOTABootloader() {
 	arm.DisableInterrupts()
-	nrf.POWER.GPREGRET.Set(dfuMagicOTAReset)
+	nrf.POWER.GPREGRET.Set(DFU_MAGIC_OTA_RESET)
 	arm.SystemReset()
 }

src/machine/machine_nxpmk66f18.go

@@ -42,19 +42,13 @@ const deviceName = nxp.Device
 
 const (
 	PinInput PinMode = iota
-	PinInputPullup
-	PinInputPulldown
+	PinInputPullUp
+	PinInputPullDown
 	PinOutput
 	PinOutputOpenDrain
 	PinDisable
 )
 
-// Deprecated: use PinInputPullup and PinInputPulldown instead.
-const (
-	PinInputPullUp   = PinInputPullup
-	PinInputPullDown = PinInputPulldown
-)
-
 const (
 	PA00 Pin = iota
 	PA01
@@ -229,11 +223,11 @@ func (p Pin) Configure(config PinConfig) {
 		gpio.PDDR.ClearBits(1 << pos)
 		pcr.Set((1 << nxp.PORT_PCR0_MUX_Pos))
 
-	case PinInputPullup:
+	case PinInputPullUp:
 		gpio.PDDR.ClearBits(1 << pos)
 		pcr.Set((1 << nxp.PORT_PCR0_MUX_Pos) | nxp.PORT_PCR0_PE | nxp.PORT_PCR0_PS)
 
-	case PinInputPulldown:
+	case PinInputPullDown:
 		gpio.PDDR.ClearBits(1 << pos)
 		pcr.Set((1 << nxp.PORT_PCR0_MUX_Pos) | nxp.PORT_PCR0_PE)
 

src/machine/machine_nxpmk66f18_uart.go

@@ -203,8 +203,8 @@ func (u *UART) Disable() {
 	u.C2.Set(0)
 
 	// reconfigure pin
-	u.DefaultRX.Configure(PinConfig{Mode: PinInputPullup})
-	u.DefaultTX.Configure(PinConfig{Mode: PinInputPullup})
+	u.DefaultRX.Configure(PinConfig{Mode: PinInputPullUp})
+	u.DefaultTX.Configure(PinConfig{Mode: PinInputPullUp})
 
 	// clear flags
 	u.S1.Get()

src/machine/machine_rp2040.go

@@ -11,36 +11,36 @@ const deviceName = rp.Device
 
 const (
 	// GPIO pins
-	GPIO0  Pin = 0  // peripherals: PWM0 channel A
-	GPIO1  Pin = 1  // peripherals: PWM0 channel B
-	GPIO2  Pin = 2  // peripherals: PWM1 channel A
-	GPIO3  Pin = 3  // peripherals: PWM1 channel B
-	GPIO4  Pin = 4  // peripherals: PWM2 channel A
-	GPIO5  Pin = 5  // peripherals: PWM2 channel B
-	GPIO6  Pin = 6  // peripherals: PWM3 channel A
-	GPIO7  Pin = 7  // peripherals: PWM3 channel B
-	GPIO8  Pin = 8  // peripherals: PWM4 channel A
-	GPIO9  Pin = 9  // peripherals: PWM4 channel B
-	GPIO10 Pin = 10 // peripherals: PWM5 channel A
-	GPIO11 Pin = 11 // peripherals: PWM5 channel B
-	GPIO12 Pin = 12 // peripherals: PWM6 channel A
-	GPIO13 Pin = 13 // peripherals: PWM6 channel B
-	GPIO14 Pin = 14 // peripherals: PWM7 channel A
-	GPIO15 Pin = 15 // peripherals: PWM7 channel B
-	GPIO16 Pin = 16 // peripherals: PWM0 channel A
-	GPIO17 Pin = 17 // peripherals: PWM0 channel B
-	GPIO18 Pin = 18 // peripherals: PWM1 channel A
-	GPIO19 Pin = 19 // peripherals: PWM1 channel B
-	GPIO20 Pin = 20 // peripherals: PWM2 channel A
-	GPIO21 Pin = 21 // peripherals: PWM2 channel B
-	GPIO22 Pin = 22 // peripherals: PWM3 channel A
-	GPIO23 Pin = 23 // peripherals: PWM3 channel B
-	GPIO24 Pin = 24 // peripherals: PWM4 channel A
-	GPIO25 Pin = 25 // peripherals: PWM4 channel B
-	GPIO26 Pin = 26 // peripherals: PWM5 channel A
-	GPIO27 Pin = 27 // peripherals: PWM5 channel B
-	GPIO28 Pin = 28 // peripherals: PWM6 channel A
-	GPIO29 Pin = 29 // peripherals: PWM6 channel B
+	GPIO0  Pin = 0
+	GPIO1  Pin = 1
+	GPIO2  Pin = 2
+	GPIO3  Pin = 3
+	GPIO4  Pin = 4
+	GPIO5  Pin = 5
+	GPIO6  Pin = 6
+	GPIO7  Pin = 7
+	GPIO8  Pin = 8
+	GPIO9  Pin = 9
+	GPIO10 Pin = 10
+	GPIO11 Pin = 11
+	GPIO12 Pin = 12
+	GPIO13 Pin = 13
+	GPIO14 Pin = 14
+	GPIO15 Pin = 15
+	GPIO16 Pin = 16
+	GPIO17 Pin = 17
+	GPIO18 Pin = 18
+	GPIO19 Pin = 19
+	GPIO20 Pin = 20
+	GPIO21 Pin = 21
+	GPIO22 Pin = 22
+	GPIO23 Pin = 23
+	GPIO24 Pin = 24
+	GPIO25 Pin = 25
+	GPIO26 Pin = 26
+	GPIO27 Pin = 27
+	GPIO28 Pin = 28
+	GPIO29 Pin = 29
 
 	// Analog pins
 	ADC0 Pin = GPIO26

src/machine/machine_rp2040_adc.go

@@ -17,8 +17,8 @@ const (
 	adc0_CH ADCChannel = iota
 	adc1_CH
 	adc2_CH
-	adc3_CH       // Note: GPIO29 not broken out on pico board
-	adcTempSensor // Internal temperature sensor channel
+	adc3_CH         // Note: GPIO29 not broken out on pico board
+	ADC_TEMP_SENSOR // Internal temperature sensor channel
 )
 
 // Used to serialise ADC sampling
@@ -75,17 +75,19 @@ func (a ADC) GetADCChannel() (c ADCChannel, err error) {
 	return c, err
 }
 
-// Configure sets the channel's associated pin to analog input mode.
+// Configure sets the channel's associated pin to analog input mode or powers on the temperature sensor for ADC_TEMP_SENSOR.
 // The powered on temperature sensor increases ADC_AVDD current by approximately 40 μA.
 func (c ADCChannel) Configure(config ADCConfig) error {
 	if config.Reference != 0 {
 		adcAref = config.Reference
 	}
-	p, err := c.Pin()
-	if err != nil {
-		return err
+	if p, err := c.Pin(); err == nil {
+		p.Configure(PinConfig{Mode: PinAnalog})
+	}
+	if c == ADC_TEMP_SENSOR {
+		// Enable temperature sensor bias source
+		rp.ADC.CS.SetBits(rp.ADC_CS_TS_EN)
 	}
-	p.Configure(PinConfig{Mode: PinAnalog})
 	return nil
 }
 
@@ -110,16 +112,13 @@ func (c ADCChannel) getVoltage() uint32 {
 }
 
 // ReadTemperature does a one-shot sample of the internal temperature sensor and returns a milli-celsius reading.
-func ReadTemperature() (millicelsius int32) {
-	if rp.ADC.CS.Get()&rp.ADC_CS_EN == 0 {
-		InitADC()
+// Only works on the ADC_TEMP_SENSOR channel. aka AINSEL=4. Other channels will return 0
+func (c ADCChannel) ReadTemperature() (millicelsius uint32) {
+	if c != ADC_TEMP_SENSOR {
+		return
 	}
-
-	// Enable temperature sensor bias source
-	rp.ADC.CS.SetBits(rp.ADC_CS_TS_EN)
-
 	// T = 27 - (ADC_voltage - 0.706)/0.001721
-	return (27000<<16 - (int32(adcTempSensor.getVoltage())-706<<16)*581) >> 16
+	return (27000<<16 - (c.getVoltage()-706<<16)*581) >> 16
 }
 
 // waitForReady spins waiting for the ADC peripheral to become ready.

src/machine/machine_rp2040_clocks.go

@@ -10,6 +10,11 @@ import (
 	"unsafe"
 )
 
+const (
+	KHz = 1000
+	MHz = 1000000
+)
+
 func CPUFrequency() uint32 {
 	return 125 * MHz
 }

src/machine/machine_rp2040_gpio.go

@@ -226,8 +226,12 @@ type PinChange uint8
 
 // Pin change interrupt constants for SetInterrupt.
 const (
+	// PinLevelLow triggers whenever pin is at a low (around 0V) logic level.
+	PinLevelLow PinChange = 1 << iota
+	// PinLevelLow triggers whenever pin is at a high (around 3V) logic level.
+	PinLevelHigh
 	// Edge falling
-	PinFalling PinChange = 4 << iota
+	PinFalling
 	// Edge rising
 	PinRising
 )

src/machine/machine_rp2040_rng.go

@@ -1,42 +0,0 @@
-//go:build rp2040
-// +build rp2040
-
-// Implementation based on code located here:
-// https://github.com/raspberrypi/pico-sdk/blob/master/src/rp2_common/pico_lwip/random.c
-
-package machine
-
-import (
-	"device/rp"
-)
-
-const numberOfCycles = 32
-
-// GetRNG returns 32 bits of semi-random data based on ring oscillator.
-//
-// Unlike some other implementations of GetRNG, these random numbers are not
-// cryptographically secure and must not be used for cryptographic operations
-// (nonces, etc).
-func GetRNG() (uint32, error) {
-	var val uint32
-	for i := 0; i < 4; i++ {
-		val = (val << 8) | uint32(roscRandByte())
-	}
-	return val, nil
-}
-
-var randomByte uint8
-
-func roscRandByte() uint8 {
-	var poly uint8
-	for i := 0; i < numberOfCycles; i++ {
-		if randomByte&0x80 != 0 {
-			poly = 0x35
-		} else {
-			poly = 0
-		}
-		randomByte = ((randomByte << 1) | uint8(rp.ROSC.GetRANDOMBIT()) ^ poly)
-		// TODO: delay a little because the random bit is a little slow
-	}
-	return randomByte
-}

src/machine/machine_rp2040_spi.go

@@ -38,9 +38,10 @@ type SPIConfig struct {
 }
 
 var (
-	ErrLSBNotSupported = errors.New("SPI LSB unsupported on PL022")
-	ErrSPITimeout      = errors.New("SPI timeout")
-	ErrSPIBaud         = errors.New("SPI baud too low or above 66.5Mhz")
+	ErrLSBNotSupported    = errors.New("SPI LSB unsupported on PL022")
+	ErrTxInvalidSliceSize = errors.New("SPI write and read slices must be same size")
+	ErrSPITimeout         = errors.New("SPI timeout")
+	ErrSPIBaud            = errors.New("SPI baud too low or above 66.5Mhz")
 )
 
 type SPI struct {

src/machine/machine_stm32_i2c_reva.go

@@ -137,7 +137,7 @@ func (i2c *I2C) Configure(config I2CConfig) error {
 
 	// default to 100 kHz (Sm, standard mode) if no frequency is set
 	if config.Frequency == 0 {
-		config.Frequency = 100 * KHz
+		config.Frequency = TWI_FREQ_100KHZ
 	}
 
 	// configure I2C input clock

src/machine/spi.go

@@ -1,5 +1,5 @@
-//go:build !baremetal || atmega || esp32 || fe310 || k210 || nrf || (nxp && !mk66f18) || rp2040 || sam || (stm32 && !stm32f7x2 && !stm32l5x2)
-// +build !baremetal atmega esp32 fe310 k210 nrf nxp,!mk66f18 rp2040 sam stm32,!stm32f7x2,!stm32l5x2
+//go:build !baremetal || (stm32 && !stm32f7x2 && !stm32l5x2) || fe310 || k210 || (nxp && !mk66f18) || atmega
+// +build !baremetal stm32,!stm32f7x2,!stm32l5x2 fe310 k210 nxp,!mk66f18 atmega
 
 package machine
 
@@ -17,3 +17,58 @@ var (
 	ErrTxInvalidSliceSize      = errors.New("SPI write and read slices must be same size")
 	errSPIInvalidMachineConfig = errors.New("SPI port was not configured properly by the machine")
 )
+
+// Tx handles read/write operation for SPI interface. Since SPI is a syncronous write/read
+// interface, there must always be the same number of bytes written as bytes read.
+// The Tx method knows about this, and offers a few different ways of calling it.
+//
+// This form sends the bytes in tx buffer, putting the resulting bytes read into the rx buffer.
+// Note that the tx and rx buffers must be the same size:
+//
+//	spi.Tx(tx, rx)
+//
+// This form sends the tx buffer, ignoring the result. Useful for sending "commands" that return zeros
+// until all the bytes in the command packet have been received:
+//
+//	spi.Tx(tx, nil)
+//
+// This form sends zeros, putting the result into the rx buffer. Good for reading a "result packet":
+//
+//	spi.Tx(nil, rx)
+func (spi SPI) Tx(w, r []byte) error {
+	var err error
+
+	switch {
+	case w == nil:
+		// read only, so write zero and read a result.
+		for i := range r {
+			r[i], err = spi.Transfer(0)
+			if err != nil {
+				return err
+			}
+		}
+	case r == nil:
+		// write only
+		for _, b := range w {
+			_, err = spi.Transfer(b)
+			if err != nil {
+				return err
+			}
+		}
+
+	default:
+		// write/read
+		if len(w) != len(r) {
+			return ErrTxInvalidSliceSize
+		}
+
+		for i, b := range w {
+			r[i], err = spi.Transfer(b)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}

src/machine/spi_tx.go

@@ -1,62 +0,0 @@
-//go:build !baremetal || atmega || fe310 || k210 || (nxp && !mk66f18) || (stm32 && !stm32f7x2 && !stm32l5x2)
-// +build !baremetal atmega fe310 k210 nxp,!mk66f18 stm32,!stm32f7x2,!stm32l5x2
-
-// This file implements the SPI Tx function for targets that don't have a custom
-// (faster) implementation for it.
-
-package machine
-
-// Tx handles read/write operation for SPI interface. Since SPI is a syncronous write/read
-// interface, there must always be the same number of bytes written as bytes read.
-// The Tx method knows about this, and offers a few different ways of calling it.
-//
-// This form sends the bytes in tx buffer, putting the resulting bytes read into the rx buffer.
-// Note that the tx and rx buffers must be the same size:
-//
-//	spi.Tx(tx, rx)
-//
-// This form sends the tx buffer, ignoring the result. Useful for sending "commands" that return zeros
-// until all the bytes in the command packet have been received:
-//
-//	spi.Tx(tx, nil)
-//
-// This form sends zeros, putting the result into the rx buffer. Good for reading a "result packet":
-//
-//	spi.Tx(nil, rx)
-func (spi SPI) Tx(w, r []byte) error {
-	var err error
-
-	switch {
-	case w == nil:
-		// read only, so write zero and read a result.
-		for i := range r {
-			r[i], err = spi.Transfer(0)
-			if err != nil {
-				return err
-			}
-		}
-	case r == nil:
-		// write only
-		for _, b := range w {
-			_, err = spi.Transfer(b)
-			if err != nil {
-				return err
-			}
-		}
-
-	default:
-		// write/read
-		if len(w) != len(r) {
-			return ErrTxInvalidSliceSize
-		}
-
-		for i, b := range w {
-			r[i], err = spi.Transfer(b)
-			if err != nil {
-				return err
-			}
-		}
-	}
-
-	return nil
-}

src/machine/uart.go

@@ -8,20 +8,20 @@ import "errors"
 var errUARTBufferEmpty = errors.New("UART buffer empty")
 
 // UARTParity is the parity setting to be used for UART communication.
-type UARTParity uint8
+type UARTParity int
 
 const (
 	// ParityNone means to not use any parity checking. This is
 	// the most common setting.
-	ParityNone UARTParity = iota
+	ParityNone UARTParity = 0
 
 	// ParityEven means to expect that the total number of 1 bits sent
 	// should be an even number.
-	ParityEven
+	ParityEven UARTParity = 1
 
 	// ParityOdd means to expect that the total number of 1 bits sent
 	// should be an odd number.
-	ParityOdd
+	ParityOdd UARTParity = 2
 )
 
 // To implement the UART interface for a board, you must declare a concrete type as follows:

src/runtime/arch_tinygowasm.go

@@ -20,46 +20,21 @@ var heapStartSymbol [0]byte
 //go:extern __global_base
 var globalsStartSymbol [0]byte
 
-const (
-	// wasmMemoryIndex is always zero until the multi-memory feature is used.
-	//
-	// See https://github.com/WebAssembly/multi-memory
-	wasmMemoryIndex = 0
-
-	// wasmPageSize is the size of a page in WebAssembly's 32-bit memory. This
-	// is also its only unit of change.
-	//
-	// See https://www.w3.org/TR/wasm-core-1/#page-size
-	wasmPageSize = 64 * 1024
-)
-
-// wasm_memory_size invokes the "memory.size" instruction, which returns the
-// current size to the memory at the given index (always wasmMemoryIndex), in
-// pages.
-//
 //export llvm.wasm.memory.size.i32
 func wasm_memory_size(index int32) int32
 
-// wasm_memory_grow invokes the "memory.grow" instruction, which attempts to
-// increase the size of the memory at the given index (always wasmMemoryIndex),
-// by the delta (in pages). This returns the previous size on success of -1 on
-// failure.
-//
 //export llvm.wasm.memory.grow.i32
 func wasm_memory_grow(index int32, delta int32) int32
 
 var (
-	// heapStart is the current memory offset which starts the heap. The heap
-	// extends from this offset until heapEnd (exclusive).
-	heapStart = uintptr(unsafe.Pointer(&heapStartSymbol))
-
-	// heapEnd is the current memory length in bytes.
-	heapEnd = uintptr(wasm_memory_size(wasmMemoryIndex) * wasmPageSize)
-
+	heapStart    = uintptr(unsafe.Pointer(&heapStartSymbol))
+	heapEnd      = uintptr(wasm_memory_size(0) * wasmPageSize)
 	globalsStart = uintptr(unsafe.Pointer(&globalsStartSymbol))
 	globalsEnd   = uintptr(unsafe.Pointer(&heapStartSymbol))
 )
 
+const wasmPageSize = 64 * 1024
+
 func align(ptr uintptr) uintptr {
 	// Align to 16, which is the alignment of max_align_t:
 	// https://godbolt.org/z/dYqTsWrGq
@@ -73,67 +48,44 @@ func getCurrentStackPointer() uintptr
 // otherwise.
 func growHeap() bool {
 	// Grow memory by the available size, which means the heap size is doubled.
-	memorySize := wasm_memory_size(wasmMemoryIndex)
-	result := wasm_memory_grow(wasmMemoryIndex, memorySize)
+	memorySize := wasm_memory_size(0)
+	result := wasm_memory_grow(0, memorySize)
 	if result == -1 {
 		// Grow failed.
 		return false
 	}
 
-	setHeapEnd(uintptr(wasm_memory_size(wasmMemoryIndex) * wasmPageSize))
+	setHeapEnd(uintptr(wasm_memory_size(0) * wasmPageSize))
 
 	// Heap has grown successfully.
 	return true
 }
 
-// The below functions override the default allocator of wasi-libc. This ensures
-// code linked from other languages can allocate memory without colliding with
-// our GC allocations.
-
-var allocs = make(map[uintptr][]byte)
+// The below functions override the default allocator of wasi-libc.
+// Most functions are defined but unimplemented to make sure that if there is
+// any code using them, they will get an error instead of (incorrectly) using
+// the wasi-libc dlmalloc heap implementation instead. If they are needed by any
+// program, they can certainly be implemented.
 
 //export malloc
 func libc_malloc(size uintptr) unsafe.Pointer {
-	buf := make([]byte, size)
-	ptr := unsafe.Pointer(&buf[0])
-	allocs[uintptr(ptr)] = buf
-	return ptr
+	return alloc(size, nil)
 }
 
 //export free
 func libc_free(ptr unsafe.Pointer) {
-	if ptr == nil {
-		return
-	}
-	if _, ok := allocs[uintptr(ptr)]; ok {
-		delete(allocs, uintptr(ptr))
-	} else {
-		panic("free: invalid pointer")
-	}
+	free(ptr)
 }
 
 //export calloc
 func libc_calloc(nmemb, size uintptr) unsafe.Pointer {
-	// No difference between calloc and malloc.
-	return libc_malloc(nmemb * size)
+	// Note: we could be even more correct here and check that nmemb * size
+	// doesn't overflow. However the current implementation should normally work
+	// fine.
+	return alloc(nmemb*size, nil)
 }
 
 //export realloc
-func libc_realloc(oldPtr unsafe.Pointer, size uintptr) unsafe.Pointer {
-	// It's hard to optimize this to expand the current buffer with our GC, but
-	// it is theoretically possible. For now, just always allocate fresh.
-	buf := make([]byte, size)
-
-	if oldPtr != nil {
-		if oldBuf, ok := allocs[uintptr(oldPtr)]; ok {
-			copy(buf, oldBuf)
-			delete(allocs, uintptr(oldPtr))
-		} else {
-			panic("realloc: invalid pointer")
-		}
-	}
-
-	ptr := unsafe.Pointer(&buf[0])
-	allocs[uintptr(ptr)] = buf
-	return ptr
+func libc_realloc(ptr unsafe.Pointer, size uintptr) unsafe.Pointer {
+	return realloc(ptr, size)
 }

src/runtime/build_asserts.go

@@ -1,9 +0,0 @@
-//go:build runtime_asserts
-
-package runtime
-
-// enable assertions for the garbage collector
-const gcAsserts = true
-
-// enable asserts for the scheduler
-const schedulerAsserts = true

src/runtime/build_noasserts.go

@@ -1,9 +0,0 @@
-//go:build !runtime_asserts
-
-package runtime
-
-// disable assertions for the garbage collector
-const gcAsserts = false
-
-// disable assertions for the scheduler
-const schedulerAsserts = false

src/runtime/gc_conservative.go

@@ -25,9 +25,7 @@ package runtime
 // heapStart..metadataStart.
 //
 // More information:
-// https://aykevl.nl/2020/09/gc-tinygo
 // https://github.com/micropython/micropython/wiki/Memory-Manager
-// https://github.com/micropython/micropython/blob/master/py/gc.c
 // "The Garbage Collection Handbook" by Richard Jones, Antony Hosking, Eliot
 // Moss.
 
@@ -37,7 +35,11 @@ import (
 	"unsafe"
 )
 
-const gcDebug = false
+// Set gcDebug to true to print debug information.
+const (
+	gcDebug   = false   // print debug info
+	gcAsserts = gcDebug // perform sanity checks
+)
 
 // Some globals + constants for the entire GC.
 
@@ -286,14 +288,7 @@ func alloc(size uintptr, layout unsafe.Pointer) unsafe.Pointer {
 				// could be found. Run a garbage collection cycle to reclaim
 				// free memory and try again.
 				heapScanCount = 2
-				freeBytes := runGC()
-				heapSize := uintptr(metadataStart) - heapStart
-				if freeBytes < heapSize/3 {
-					// Ensure there is at least 33% headroom.
-					// This percentage was arbitrarily chosen, and may need to
-					// be tuned in the future.
-					growHeap()
-				}
+				GC()
 			} else {
 				// Even after garbage collection, no free memory could be found.
 				// Try to increase heap size.
@@ -384,13 +379,6 @@ func free(ptr unsafe.Pointer) {
 
 // GC performs a garbage collection cycle.
 func GC() {
-	runGC()
-}
-
-// runGC performs a garbage colleciton cycle. It is the internal implementation
-// of the runtime.GC() function. The difference is that it returns the number of
-// free bytes in the heap after the GC is finished.
-func runGC() (freeBytes uintptr) {
 	if gcDebug {
 		println("running collection cycle...")
 	}
@@ -432,14 +420,12 @@ func runGC() (freeBytes uintptr) {
 
 	// Sweep phase: free all non-marked objects and unmark marked objects for
 	// the next collection cycle.
-	freeBytes = sweep()
+	sweep()
 
 	// Show how much has been sweeped, for debugging.
 	if gcDebug {
 		dumpHeap()
 	}
-
-	return
 }
 
 // markRoots reads all pointers from start to end (exclusive) and if they look
@@ -582,8 +568,7 @@ func markRoot(addr, root uintptr) {
 }
 
 // Sweep goes through all memory and frees unmarked memory.
-// It returns how many bytes are free in the heap after the sweep.
-func sweep() (freeBytes uintptr) {
+func sweep() {
 	freeCurrentObject := false
 	for block := gcBlock(0); block < endBlock; block++ {
 		switch block.state() {
@@ -592,13 +577,11 @@ func sweep() (freeBytes uintptr) {
 			block.markFree()
 			freeCurrentObject = true
 			gcFrees++
-			freeBytes += bytesPerBlock
 		case blockStateTail:
 			if freeCurrentObject {
 				// This is a tail object following an unmarked head.
 				// Free it now.
 				block.markFree()
-				freeBytes += bytesPerBlock
 			}
 		case blockStateMark:
 			// This is a marked object. The next tail blocks must not be freed,
@@ -606,11 +589,8 @@ func sweep() (freeBytes uintptr) {
 			// collect this object if it is unreferenced then.
 			block.unmark()
 			freeCurrentObject = false
-		case blockStateFree:
-			freeBytes += bytesPerBlock
 		}
 	}
-	return
 }
 
 // looksLikePointer returns whether this could be a pointer. Currently, it

src/runtime/gc_leaking.go

@@ -11,6 +11,8 @@ import (
 	"unsafe"
 )
 
+const gcAsserts = false // perform sanity checks
+
 // Ever-incrementing pointer: no memory is freed.
 var heapptr = heapStart
 

src/runtime/gc_none.go

@@ -11,6 +11,8 @@ import (
 	"unsafe"
 )
 
+const gcAsserts = false // perform sanity checks
+
 var gcTotalAlloc uint64 // for runtime.MemStats
 var gcMallocs uint64
 var gcFrees uint64

src/runtime/pprof/pprof.go

@@ -10,7 +10,8 @@ import (
 
 var ErrUnimplemented = errors.New("runtime/pprof: unimplemented")
 
-type Profile struct{}
+type Profile struct {
+}
 
 func StartCPUProfile(w io.Writer) error {
 	return nil
@@ -27,18 +28,6 @@ func Lookup(name string) *Profile {
 	return nil
 }
 
-func (p *Profile) Name() string {
-	return ""
-}
-
-func (p *Profile) Count() int {
-	return 0
-}
-
 func (p *Profile) WriteTo(w io.Writer, debug int) error {
 	return ErrUnimplemented
 }
-
-func Profiles() []*Profile {
-	return nil
-}

src/runtime/trace/trace.go

@@ -1,13 +0,0 @@
-// Stubs for the runtime/trace package
-package trace
-
-import (
-	"errors"
-	"io"
-)
-
-func Start(w io.Writer) error {
-	return errors.New("not implemented")
-}
-
-func Stop() {}

src/sync/map.go

@@ -34,17 +34,6 @@ func (m *Map) LoadOrStore(key, value interface{}) (actual interface{}, loaded bo
 	return value, false
 }
 
-func (m *Map) LoadAndDelete(key interface{}) (value interface{}, loaded bool) {
-	m.lock.Lock()
-	defer m.lock.Unlock()
-	value, ok := m.m[key]
-	if !ok {
-		return nil, false
-	}
-	delete(m.m, key)
-	return value, true
-}
-
 func (m *Map) Store(key, value interface{}) {
 	m.lock.Lock()
 	defer m.lock.Unlock()

src/sync/map_test.go

@@ -1,19 +0,0 @@
-package sync_test
-
-import (
-	"sync"
-	"testing"
-)
-
-func TestMapLoadAndDelete(t *testing.T) {
-	var sm sync.Map
-	sm.Store("present", "value")
-
-	if v, ok := sm.LoadAndDelete("present"); !ok || v != "value" {
-		t.Errorf("LoadAndDelete returned %v, %v, want value, true", v, ok)
-	}
-
-	if v, ok := sm.LoadAndDelete("absent"); ok || v != nil {
-		t.Errorf("LoadAndDelete returned %v, %v, want nil, false", v, ok)
-	}
-}

targets/circuitplay-bluefruit.json

@@ -1,6 +1,6 @@
 {
     "inherits": ["nrf52840", "nrf52840-s140v6-uf2"],
     "build-tags": ["circuitplay_bluefruit"],
-    "serial-port": ["acm:239a:8045"],
+    "serial-port": ["acm:239a:8045", "acm:239a:45"],
     "msd-volume-name": "CPLAYBTBOOT"
 }

targets/circuitplay-express.json

@@ -3,7 +3,7 @@
     "build-tags": ["circuitplay_express"],
     "flash-1200-bps-reset": "true",
     "flash-method": "msd",
-    "serial-port": ["acm:239a:8018"],
+    "serial-port": ["acm:239a:8018", "acm:239a:18"],
     "msd-volume-name": "CPLAYBOOT",
     "msd-firmware-name": "firmware.uf2"
 }

targets/clue-alpha.json

@@ -1,6 +1,6 @@
 {
     "inherits": ["nrf52840", "nrf52840-s140v6-uf2"],
     "build-tags": ["clue_alpha"],
-    "serial-port": ["acm:239a:8072", "acm:239a:8071"],
+    "serial-port": ["acm:239a:8072", "acm:239a:0072", "acm:239a:0071", "acm:239a:8071"],
     "msd-volume-name": "CLUEBOOT"
 }

targets/esp32c3-12f.json

@@ -1,5 +1,5 @@
 {
 	"inherits": ["esp32c3"],
-	"build-tags": ["esp32c312f"]
+	"build-tags": ["esp32c312f", "esp32c3", "esp"]
 }