rp2040: make all RP2040 boards available for simulation

This makes all rp2040 boards available for simulation using
-tags=<board_name>. Importantly, this includes the Gopher Badge which
I'm working on to add to the TinyGo Playground.

GNUmakefile

@@ -525,6 +525,8 @@ ifneq ($(WASM), 0)
 	@$(MD5SUM) test.wasm
 	$(TINYGO) build -size short -o test.wasm -tags=mch2022              examples/serial
 	@$(MD5SUM) test.wasm
+	$(TINYGO) build -size short -o test.wasm -tags=gopher_badge         examples/blinky1
+	@$(MD5SUM) test.wasm
 endif
 	# test all targets/boards
 	$(TINYGO) build -size short -o test.hex -target=pca10040-s132v6     examples/blinky1

src/machine/machine_generic.go

@@ -7,15 +7,14 @@ package machine
 const deviceName = "generic"
 
 var (
-	UART0 = &UART{0}
+	USB = &UART{100}
-	USB   = &UART{100}
 )
 
 // The Serial port always points to the default UART in a simulated environment.
 //
 // TODO: perhaps this should be a special serial object that outputs via WASI
 // stdout calls.
-var Serial = UART0
+var Serial = hardwareUART0
 
 const (
 	PinInput PinMode = iota
@@ -176,6 +175,11 @@ func uartRead(bus uint8, buf *byte, bufLen int) int
 //export __tinygo_uart_write
 func uartWrite(bus uint8, buf *byte, bufLen int) int
 
+var (
+	hardwareUART0 = &UART{0}
+	hardwareUART1 = &UART{1}
+)
+
 // Some objects used by Atmel SAM D chips (samd21, samd51).
 // Defined here (without build tag) for convenience.
 var (

src/machine/machine_generic_peripherals.go

@@ -6,6 +6,9 @@ package machine
 // boards that define their peripherals in the board file (e.g. board_qtpy.go).
 
 var (
-	SPI0 = SPI{0}
+	UART0 = hardwareUART0
-	I2C0 = &I2C{0}
+	UART1 = hardwareUART1
+	SPI0  = SPI{0}
+	SPI1  = SPI{1}
+	I2C0  = &I2C{0}
 )

src/machine/machine_rp2040.go

@@ -10,46 +10,6 @@ import (
 
 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
-
-	// Analog pins
-	ADC0 Pin = GPIO26
-	ADC1 Pin = GPIO27
-	ADC2 Pin = GPIO28
-	ADC3 Pin = GPIO29
-)
-
 //go:linkname machineInit runtime.machineInit
 func machineInit() {
 	// Reset all peripherals to put system into a known state,

src/machine/machine_rp2040_pins.go

@@ -0,0 +1,43 @@
+//go:build rp2040 || ae_rp2040 || badger2040 || challenger_rp2040 || feather_rp2040 || gopher_badge || kb2040 || macropad_rp2040 || nano_rp2040 || pico || qtpy_rp2040 || thingplus_rp2040 || thumby || tufty2040 || waveshare_rp2040_zero || xiao_rp2040
+
+package machine
+
+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
+
+	// Analog pins
+	ADC0 Pin = GPIO26
+	ADC1 Pin = GPIO27
+	ADC2 Pin = GPIO28
+	ADC3 Pin = GPIO29
+)