Soft reset when watchdogs timer timeout

[snowuyl]

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

[snowuyl]

I have seen the watchdog example. But I don't know what do you mean about "It's not the correct way of using the watchdog". Do you see any problem from my attache files?

[Jared]

It shouldn't be necessary to manually reset when the watchdog expires, that would defeat the whole purpose of having a watchdog. The watchdog should schedule a reset once it expires independently of the CPU. If you were dependent on the CPU reaching some state to do a reset when the watchdog has expired then the watchdog wouldn't be that useful. 

[snowuyl]

But my question is why watchdog event handler _wdtEventHandler() is not called. Could you explain about this?

<info> WDT: Function: nrfx_wdt_init, error code: NRF_SUCCESS.
 0> <info> WDT: Function: nrfx_wdt_channel_alloc, error code: NRF_SUCCESS.
 0> <info> WDT: Enabled.
 0> <debug> app: Watchdog timer feed
 0>
 0> <error> app: ERROR 4 [NRF_ERROR_NO_MEM] at ..\..\..\..\..\..\com<error> app: End of error report

[snowuyl]

Can I use NRF_LOG_WARNING() to check if  watchdog event handler _wdtEventHandler() is called? Or I need to use LED to check if  watchdog event handler _wdtEventHandler() is called?

[snowuyl]

I am sure watchdog event handler _wdtEventHandler() is called by checking with LED. But why main() isn't called after calling NVIC_SystemReset().

int main(void) {
    log_init();
    uart_init();
    _showInfo();

   ...

}

static void _showInfo(void) {
    NRF_LOG_INFO("Version %d.%d.%d\n", MAJOR_VER, MINOR_VER, PATCH_VER);
}

I only " app: Version 1.0.0" one time in following log messages. It should be two times if main() is called after system reboot.

0> <info> app: Version 1.0.0
 0>
 0> <info> app: ========| flash info |========
 0> <info> app: erase unit:   4096 bytes
 0> <info> app: program unit: 4 bytes
 0> <info> app: end address: 0x7FFFF
 0> <info> app: ==============================
 0> <info> app_timer: RTC: initialized.
 0> <debug> app: NOR_DATA_PERIOD=819
 0>
 0> <debug> app: NOR_RECORD_PERIOD=8192
 0>
 0> <info> app: bsp_button_longkey_handler 0.
 0> <info> app: POWER_ON.
 0> <info> app: External devices initializing start
 0> <info> app: Reg 0 20
 0> <info> app: Reg 9 A
 0> <info> app: Reg A D
 0> <info> app: Reg 1 B
 0> <info> app: Reg 2 D
 0> <info> app: Reg D F
 0> <info> app: Reg E 13
 0> <info> app: Reg 36 10
 0> <info> app: Reg 37 13
 0> <info> app: Reg 5 11
 0> <info> app: Reg 6 13
 0> <info> app: Reg F 15
 0> <info> app: Reg 10 19
 0> <info> app: Reg 3 16
 0> <info> app: Reg 4 19
 0> <info> app: Reg 7 17
 0> <info> app: Reg 8 19
 0> <info> app: Reg 11 1B
 0> <info> app: Reg 12 1F
 0> <info> app: Reg 43 0
 0> <info> app: Reg 44 0
 0> <info> app: Reg B 1D
 0> <info> app: Reg C 1F
 0> <info> app: Reg 13 21
 0> <info> app: Reg 14 25
 0> <info> app: Reg 1D 3F
 0> <info> app: Reg 64 0
 0> <info> app: Reg 65 27
 0> <info> app: Reg 66 0
 0> <info> app: Reg 67 27
 0> <info> app: Reg 68 0
 0> <info> app: Reg 69 27
 0> <info> app: Reg 52 2C
 0> <info> app: Reg 53 2C
 0> <info> app: Reg 6A 32
 0> <info> app: Reg 6B 38
 0> <info> app: Reg 1E 101
 0> <info> app: Reg 20 3
 0> <info> app: Reg 21 2
 0> <info> app: Reg 22 802084
 0> <info> app: Reg 23 124218
 0> <info> app: Reg 4B F
 0> <info> app: Reg 50 18
 0> <info> app: Reg 31 20
 0> <info> app: Reg 39 5
 0> <info> app: Reg 4E 0
 0> <info> app: Reg 4E 8
 0> <info> app: Reg 45 8
 0> <info> app: Reg 46 13
 0> <info> app: Reg 47 14
 0> <info> app: Reg 48 1F
 0> <info> app: Reg 0 21
 0> <warning> app: nrfx_wdt_init() return 0
 0>
 0> <info> app: External devices initializing finish