mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-03 18:47:47 +00:00
Ayke van Laethem
98f84a497d
There were a few issues that were causing qemu-system-arm and
qemu-system-riscv to give the wrong exit codes. They are in fact capable
of exiting with 0 or 1 signalled from the running application, but this
functionality wasn't used. This commit changes this in the following
ways:
* It fixes SemiHosting codes, which were incorrectly written in
decimal while they should have been written in hexadecimal (oops!).
* It modifies all the baremetal main functions (aka reset handlers) to
exit with `exit(0)` instead of `abort()`.
* It changes `syscall.Exit` to call `exit(code)` instead of `abort()`
on baremetal targets.
* It adds these new exit functions where necessary, implemented in a
way that signals the correct exit status if running under QEMU.
All in all, this means that `tinygo test` doesn't have to look at the
output of a test to determine the outcome. It can simply look at the
exit code.
96 lines
1.5 KiB
Go
96 lines
1.5 KiB
Go
// +build avr
|
|
|
|
package runtime
|
|
|
|
import (
|
|
"device/avr"
|
|
"unsafe"
|
|
)
|
|
|
|
const BOARD = "arduino"
|
|
|
|
type timeUnit uint32
|
|
|
|
var currentTime timeUnit
|
|
|
|
// Watchdog timer periods. These can be off by a large margin (hence the jump
|
|
// between 64ms and 125ms which is not an exact double), so don't rely on this
|
|
// for accurate time keeping.
|
|
const (
|
|
WDT_PERIOD_16MS = iota
|
|
WDT_PERIOD_32MS
|
|
WDT_PERIOD_64MS
|
|
WDT_PERIOD_125MS
|
|
WDT_PERIOD_250MS
|
|
WDT_PERIOD_500MS
|
|
WDT_PERIOD_1S
|
|
WDT_PERIOD_2S
|
|
)
|
|
|
|
//go:extern _sbss
|
|
var _sbss [0]byte
|
|
|
|
//go:extern _ebss
|
|
var _ebss [0]byte
|
|
|
|
//export main
|
|
func main() {
|
|
preinit()
|
|
run()
|
|
exit(0)
|
|
}
|
|
|
|
func preinit() {
|
|
// Initialize .bss: zero-initialized global variables.
|
|
ptr := unsafe.Pointer(&_sbss)
|
|
for ptr != unsafe.Pointer(&_ebss) {
|
|
*(*uint8)(ptr) = 0
|
|
ptr = unsafe.Pointer(uintptr(ptr) + 1)
|
|
}
|
|
}
|
|
|
|
func postinit() {
|
|
// Enable interrupts after initialization.
|
|
avr.Asm("sei")
|
|
}
|
|
|
|
func init() {
|
|
initUART()
|
|
}
|
|
|
|
const tickNanos = 1024 * 16384 // roughly 16ms in nanoseconds
|
|
|
|
func ticksToNanoseconds(ticks timeUnit) int64 {
|
|
return int64(ticks) * tickNanos
|
|
}
|
|
|
|
func nanosecondsToTicks(ns int64) timeUnit {
|
|
return timeUnit(ns / tickNanos)
|
|
}
|
|
|
|
// Sleep this number of ticks of 16ms.
|
|
//
|
|
// TODO: not very accurate. Improve accuracy by calibrating on startup and every
|
|
// once in a while.
|
|
func sleepTicks(d timeUnit) {
|
|
currentTime += d
|
|
for d != 0 {
|
|
sleepWDT(WDT_PERIOD_16MS)
|
|
d -= 1
|
|
}
|
|
}
|
|
|
|
func ticks() timeUnit {
|
|
return currentTime
|
|
}
|
|
|
|
func exit(code int) {
|
|
abort()
|
|
}
|
|
|
|
func abort() {
|
|
for {
|
|
sleepWDT(WDT_PERIOD_2S)
|
|
}
|
|
}
|