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//go:build rp2040
package runtime
import (
"device/arm"
"machine"
"machine/usb/cdc"
)
// machineTicks is provided by package machine.
func machineTicks() uint64
// machineLightSleep is provided by package machine.
func machineLightSleep(uint64)
type timeUnit int64
// ticks returns the number of ticks (microseconds) elapsed since power up.
func ticks() timeUnit {
t := machineTicks()
return timeUnit(t)
}
func ticksToNanoseconds(ticks timeUnit) int64 {
return int64(ticks) * 1000
}
func nanosecondsToTicks(ns int64) timeUnit {
return timeUnit(ns / 1000)
}
func sleepTicks(d timeUnit) {
if hasScheduler {
// With scheduler, sleepTicks may return early if an interrupt or
// event fires - so scheduler can schedule any go routines now
// eligible to run
machineLightSleep(uint64(d))
return
}
// Busy loop
sleepUntil := ticks() + d
for ticks() < sleepUntil {
}
}
func waitForEvents() {
arm.Asm("wfe")
}
func putchar(c byte) {
machine.Serial.WriteByte(c)
}
func getchar() byte {
for machine.Serial.Buffered() == 0 {
Gosched()
}
v, _ := machine.Serial.ReadByte()
return v
}
func buffered() int {
return machine.Serial.Buffered()
}
// machineInit is provided by package machine.
func machineInit()
func init() {
machineInit()
cdc.EnableUSBCDC()
machine.USBDev.Configure(machine.UARTConfig{})
machine.InitSerial()
}
//export Reset_Handler
func main() {
preinit()
run()
exit(0)
}
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