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nrf: add watchdog module

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Add common-hal bindings to allow the watchdog module to be used
on nrf platforms.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2020-05-20 20:09:28 +08:00
parent f4719609f7
commit abd01c5fbb
2 changed files with 40 additions and 0 deletions
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40
ports/nrf/common-hal/wdt/WDT.c Normal file
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#include "py/obj.h"
#include "py/runtime.h"
#include "shared-bindings/rtc/__init__.h"
#include "nrf_wdt.h"
#define WDT_RELOAD_COUNT 2
void common_hal_wdt_init(uint32_t duration, bool pause_during_sleep) {
unsigned int channel;
nrf_wdt_behaviour_t behaviour = NRF_WDT_BEHAVIOUR_RUN_SLEEP_HALT;
if (pause_during_sleep) {
behaviour = NRF_WDT_BEHAVIOUR_PAUSE_SLEEP_HALT;
}
nrf_wdt_behaviour_set(NRF_WDT, behaviour);
uint64_t ticks = (duration * 32768ULL) / 1000;
if (ticks > UINT32_MAX) {
mp_raise_ValueError(translate("timeout duration exceeded the maximum supported value"));
}
nrf_wdt_reload_value_set(NRF_WDT, (uint32_t) ticks);
for (channel = 0; channel < WDT_RELOAD_COUNT; channel++) {
nrf_wdt_reload_request_enable(NRF_WDT, channel);
}
nrf_wdt_task_trigger(NRF_WDT, NRF_WDT_TASK_START);
}
void common_hal_wdt_feed(void) {
unsigned int channel;
for (channel = 0; channel < WDT_RELOAD_COUNT; channel++) {
nrf_wdt_reload_request_set(NRF_WDT, (nrf_wdt_rr_register_t)(NRF_WDT_RR0 + channel));
}
}
void common_hal_wdt_disable(void) {
// mp_raise_ValueError(translate("Watchdog timer cannot be disabled -- board will reset shortly"));
}

0
ports/nrf/common-hal/wdt/__init__.c Normal file
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