mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-07 04:23:41 +00:00
Patricio Whittingslow
37f35f8c91
machine/rp2350: add support * add linker scripts for rp2350 * add bootloader * begin melding rp2040 and rp2350 APIs * add UART * add rp2350 boot patching * Fix RP2350 memory layout (#4626) * Remove rp2040-style second stage bootloader. * Add 'minimum viable' IMAGE_DEF embedded block * Create a pico2 specific target * Implement rp2350 init, clock, and uart support * Merge rp2 reset code back together * Separate chip-specific clock definitions * Clear pad isolation bit on rp2350 * Init UART in rp2350 runtime * Correct usb/serial initialization order * Implement jump-to-bootloader * test: add pico2 to smoketests --------- Signed-off-by: deadprogram <ron@hybridgroup.com> Co-authored-by: Matthew Mets <matt.mets@cibomahto.com> Co-authored-by: Matt Mets <matt@blinkinlabs.com> Co-authored-by: deadprogram <ron@hybridgroup.com>
63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
//go:build rp2040 || rp2350
|
|
|
|
package machine
|
|
|
|
import (
|
|
"device/rp"
|
|
)
|
|
|
|
// Watchdog provides access to the hardware watchdog available
|
|
// in the RP2040.
|
|
var Watchdog = &watchdogImpl{}
|
|
|
|
const (
|
|
// WatchdogMaxTimeout in milliseconds (approx 8.3s).
|
|
//
|
|
// Nominal 1us per watchdog tick, 24-bit counter,
|
|
// but due to errata two ticks consumed per 1us.
|
|
// See: Errata RP2040-E1
|
|
WatchdogMaxTimeout = (rp.WATCHDOG_LOAD_LOAD_Msk / 1000) / 2
|
|
)
|
|
|
|
type watchdogImpl struct {
|
|
// The value to reset the counter to on each Update
|
|
loadValue uint32
|
|
}
|
|
|
|
// Configure the watchdog.
|
|
//
|
|
// This method should not be called after the watchdog is started and on
|
|
// some platforms attempting to reconfigure after starting the watchdog
|
|
// is explicitly forbidden / will not work.
|
|
func (wd *watchdogImpl) Configure(config WatchdogConfig) error {
|
|
// x2 due to errata RP2040-E1
|
|
wd.loadValue = config.TimeoutMillis * 1000 * 2
|
|
if wd.loadValue > rp.WATCHDOG_LOAD_LOAD_Msk {
|
|
wd.loadValue = rp.WATCHDOG_LOAD_LOAD_Msk
|
|
}
|
|
|
|
rp.WATCHDOG.CTRL.ClearBits(rp.WATCHDOG_CTRL_ENABLE)
|
|
|
|
// Reset everything apart from ROSC and XOSC
|
|
rp.PSM.WDSEL.Set(0x0001ffff &^ (rp.PSM_WDSEL_ROSC | rp.PSM_WDSEL_XOSC))
|
|
|
|
// Pause watchdog during debug
|
|
rp.WATCHDOG.CTRL.SetBits(rp.WATCHDOG_CTRL_PAUSE_DBG0 | rp.WATCHDOG_CTRL_PAUSE_DBG1 | rp.WATCHDOG_CTRL_PAUSE_JTAG)
|
|
|
|
// Load initial counter
|
|
rp.WATCHDOG.LOAD.Set(wd.loadValue)
|
|
|
|
return nil
|
|
}
|
|
|
|
// Starts the watchdog.
|
|
func (wd *watchdogImpl) Start() error {
|
|
rp.WATCHDOG.CTRL.SetBits(rp.WATCHDOG_CTRL_ENABLE)
|
|
return nil
|
|
}
|
|
|
|
// Update the watchdog, indicating that the app is healthy.
|
|
func (wd *watchdogImpl) Update() {
|
|
rp.WATCHDOG.LOAD.Set(wd.loadValue)
|
|
}
|