How to do the log mechanism whenever wdt or hard fault happens in NRF52832?

RE: How to do the log mechanism whenever wdt or hard fault happens in NRF52832?

Meera Shah — Tue, 12 Mar 2019 06:14:10 GMT

Hey I am having the same issue, but I couldn't understand about WDT. Can you please share your code

RE: How to do the log mechanism whenever wdt or hard fault happens in NRF52832?

Cheng — Mon, 30 Oct 2017 03:11:14 GMT

Got it. Thanks for your reply. After went through the datasheet in WDT chapter, the watchdog reset will be postponed with two 32.768 kHz clock cycles after the TIMEOUT event has been generated.

I wrote too many bytes more than it could process.

RE: How to do the log mechanism whenever wdt or hard fault happens in NRF52832?

RK — Fri, 27 Oct 2017 10:01:34 GMT

what do you mean 'failed' - how did it fail? Either it's running your code or it's in a fault handler, there are no other options. Yes you can absolutely access the NVMC inside a WDT handler or any other handler come to that.

RE: How to do the log mechanism whenever wdt or hard fault happens in NRF52832?

Cheng — Fri, 27 Oct 2017 08:17:22 GMT

It failed at NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Een << NVMC_CONFIG_WEN_Pos); at the beginning of flash_page_erase. I also put the breakpoint in the hard fault handler but system did not get there. It seems like that I cannot access NVMC register in the WDT_handler. Any idea? Thanks!!!

RE: How to do the log mechanism whenever wdt or hard fault happens in NRF52832?

MartinBL — Fri, 27 Oct 2017 07:30:17 GMT

How does it fail? Hard faults? Have you debugged and set breakpoints in your functions to pinpoint where things fail?

RE: How to do the log mechanism whenever wdt or hard fault happens in NRF52832?

Cheng — Thu, 26 Oct 2017 10:40:58 GMT

I tried to access the NVMC register with the following codes in WDT_handler, but it failed. The same code works fine in main thread. Did I miss anything?

static void flash_page_erase(uint32_t * page_address){
// Turn on flash erase enable and wait until the NVMC is ready:
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Een << NVMC_CONFIG_WEN_Pos);

while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{
    // Do nothing.
}

// Erase page:
NRF_NVMC->ERASEPAGE = (uint32_t)page_address;

while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{
    // Do nothing.
}

// Turn off flash erase enable and wait until the NVMC is ready:
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);

while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{
    // Do nothing.
}

}

static void flash_word_write(uint32_t * address, uint32_t value)
{
// Turn on flash write enable and wait until the NVMC is ready:
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos);

while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{
    // Do nothing.
}

*address = value;

while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{
    // Do nothing.
}

// Turn off flash write enable and wait until the NVMC is ready:
NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);

while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{
    // Do nothing.
}

}

RE: How to do the log mechanism whenever wdt or hard fault happens in NRF52832?

Cheng — Thu, 26 Oct 2017 04:03:20 GMT

Hi RK, Do you have any example for it? I am quite rookie to arm based architecture or any example provided in SDK11?

RE: How to do the log mechanism whenever wdt or hard fault happens in NRF52832?

RK — Thu, 26 Oct 2017 03:53:07 GMT

You can't use the softdevice sd_ functions. You're already in a handler, the chip can't make a SVC call. At this point you should only use direct calls into the NVIC to clear a page and write the data you want.