Butttonless DFU issue with CONFIG_NFCT_PINS_AS_GPIOS

[chandan]

I am using nrf52832 for button less DFU. DFU is working fine when  CONFIG_NFCT_PINS_AS_GPIOS is not added in applicaton. When added seems like code is getting reset at bootloader level. Is any connection with CONFIG_NFCT_PINS_AS_GPIOS ? Please suggest.

Thanks

[chandan]

Sorry I was offline last week.

As you suggested, I set a breakpoint at the if statement after nrf_dfu_settings_write_and_backup() call in nrf_dfu_settings_init() ,I found there is no error so on_error() in main is not getting called.

Thanks

[bjorn-spockeli]

Ok, so you reach the return NRF_SUCCESS statement at the end of nrf_dfu_settings_init()? If not then it could be the settings_forbidden_parts_copy_from_backup() function that tries to write data to a protected region. Can you check the value of the pointer passed to settings_forbidden_parts_copy_from_backup()?

Best regards

Bjørn

[chandan]

I tried but seems like code is not coming at main of application. I but breakpoint at starting but its not reaching till that point. Thanks

[bjorn-spockeli]

Ok, but you confirmed that app_start() is run til the end in the bootloader? You can also try to set a breakpoint in SystemInit() in system_nrf52.c. This function is called before main().

Best regards

Bjørn

[chandan]

I put breakpoints at SystemInit() at application code, and code is going inside SystemInit().  I feel application is resetting inside defined (CONFIG_NFCT_PINS_AS_GPIOS) at NVIC_SystemReset(). Is this correct ?

 

[chandan]

Below is the code inside, Not sure UICR_NFCPINS_PROTECT_Msk, UICR_NFCPINS_PROTECT_Pos ,

/* Configure NFCT pins as GPIOs if NFCT is not to be used in your code. If CONFIG_NFCT_PINS_AS_GPIOS is not defined,
two GPIOs (see Product Specification to see which ones) will be reserved for NFC and will not be available as
normal GPIOs. */
#if defined (CONFIG_NFCT_PINS_AS_GPIOS)
if ((NRF_UICR->NFCPINS & UICR_NFCPINS_PROTECT_Msk) == (UICR_NFCPINS_PROTECT_NFC << UICR_NFCPINS_PROTECT_Pos)){
NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
NRF_UICR->NFCPINS &= ~UICR_NFCPINS_PROTECT_Msk;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
NVIC_SystemReset();
}
#endif

[chandan]

bjorn-spockeli please suggest.