Soft reset when watchdogs timer timeout

[snowuyl]

Could I trigger nRF52832 to do soft reset when watchdogs timer timeout?

[snowuyl]

3542.wdt.h

Fullscreen 4213.wdt.c Download

#include "band_nctu.h"
#include "error.h"
#include "nrf_log.h"
#include "nrfx_wdt.h"
#include "wdt.h"

static bool _gWdtInitialized = false;
static nrfx_wdt_channel_id _gWdtChannelID;

void _wdtReboot(void) {
    NVIC_SystemReset();
}

/*
 *  WDT events handler.
 */
static void _wdtEventHandler(void) {
    NRF_LOG_WARNING("Watchdog timer event handler\n");
    _wdtReboot();
}

int wdtInit(void) {
    ret_code_t errCode;
    nrfx_wdt_config_t wdtConfig = NRFX_WDT_DEAFULT_CONFIG;
	errCode = nrfx_wdt_init(&wdtConfig, _wdtEventHandler);
    if (errCode != NRF_SUCCESS) {
	    NRF_LOG_WARNING("nrfx_wdt_init() failed\n");
        return ERROR_WDT_INITIALIZE_FAIL;
    }
    
	errCode = nrfx_wdt_channel_alloc(&_gWdtChannelID);
	if (errCode != NRF_SUCCESS) {
	    NRF_LOG_WARNING("nrfx_wdt_init() failed\n");
        return ERROR_WDT_INITIALIZE_FAIL;
    }

	nrfx_wdt_enable();

    _gWdtInitialized = true;

    NRF_LOG_WARNING("nrfx_wdt_init() return 0\n");
    return 0;
}

int wdtFeed(void) {
    if (!_gWdtInitialized) {
        return ERROR_WDT_UNINITIALIZED;
    }

    NRF_LOG_DEBUG("Watchdog timer feed\n");
    nrfx_wdt_channel_feed(_gWdtChannelID);

    return 0;
}

[Jared]

snowuyl said:

 0> <error> app: ERROR 4 [NRF_ERROR_NO_MEM] at ..\..\..\..\..\..\com<error> app: End of error report

Something is asserting in your program, a function is returning error code 4. The full error report should specify what function that is returning that code. 

snowuyl said:

But why main() isn't called after calling NVIC_SystemReset().

The CPU will do a reset when this function is called, the program will not return directly to the main loop but would rather start from the beginning again.

regards

Jared 

[snowuyl]

Does Nordic provide API for soft reset and return directly to the main loop?

[Jared]

Hi,

No every type of reset whether it's brownout reset, pin reset, soft reset, power-on-reset, watchdog reset, wake up from system off reset will reset the program. 

regards

Jared