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nrf52: add watchdog (#8485)

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* nrf52: add watchdog

Main thread only for now.

* bump framework-arduinoadafruitnrf52 to pick up new wdt support

* clang-format the new parts of main-nrf52.cpp

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
This commit is contained in:
Sebastian Kuzminsky
2025-11-04 04:35:44 -07:00
committed by GitHub
parent 91621427f1
commit 83954293d8
2 changed files with 34 additions and 1 deletions
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33
src/platform/nrf52/main-nrf52.cpp
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@@ -4,6 +4,13 @@
#include <InternalFileSystem.h>
#include <SPI.h>
#include <Wire.h>
#define NRFX_WDT_ENABLED 1
#define NRFX_WDT0_ENABLED 1
#define NRFX_WDT_CONFIG_NO_IRQ 1
#include <nrfx_wdt.c>
#include <nrfx_wdt.h>
#include <assert.h>
#include <ble_gap.h>
#include <memory.h>
@@ -19,6 +26,9 @@
#include "BQ25713.h"
#endif
static nrfx_wdt_t nrfx_wdt = NRFX_WDT_INSTANCE(0);
static nrfx_wdt_channel_id nrfx_wdt_channel_id_nrf52_main;
static inline void debugger_break(void)
{
__asm volatile("bkpt #0x01\n\t"
@@ -202,6 +212,15 @@ void checkSDEvents()
void nrf52Loop()
{
{
static bool watchdog_running = false;
if (!watchdog_running) {
nrfx_wdt_enable(&nrfx_wdt);
watchdog_running = true;
}
}
nrfx_wdt_channel_feed(&nrfx_wdt, nrfx_wdt_channel_id_nrf52_main);
checkSDEvents();
reportLittleFSCorruptionOnce();
}
@@ -269,6 +288,20 @@ void nrf52Setup()
LOG_DEBUG("Set random seed %u", seed.seed32);
randomSeed(seed.seed32);
nRFCrypto.end();
// Set up nrfx watchdog. Do not enable the watchdog yet (we do that
// the first time through the main loop), so that other threads can
// allocate their own wdt channel to protect themselves from hangs.
nrfx_wdt_config_t wdt0_config = {
.behaviour = NRF_WDT_BEHAVIOUR_RUN_SLEEP, .reload_value = 2000,
// Note: Not using wdt interrupts.
// .interrupt_priority = NRFX_WDT_DEFAULT_CONFIG_IRQ_PRIORITY
};
nrfx_err_t r = nrfx_wdt_init(&nrfx_wdt, &wdt0_config,
nullptr // Watchdog event handler, not used, we just reset.
);
r = nrfx_wdt_channel_alloc(&nrfx_wdt, &nrfx_wdt_channel_id_nrf52_main);
}
void cpuDeepSleep(uint32_t msecToWake)