How can I save some data to flash before the nrf51822 chip reset?

[mike zt]

I use nrf51822qfaa,s110 v8.00,keil MDK IDE. If the program is wrong,The chip will reset, I want to save some data to the FLASH area before the chip reset. What I need to do? Use pstorage or other? Who can offer an example.

[mike zt]

Hi,Vidar Berg now I add custom handle at below,is OK?

/*lint -save -e14 */
__WEAK void app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t * p_file_name)

{
    // On assert, the system can only recover with a reset.

#ifndef DEBUG
      NVIC_SystemReset();
#else

#ifdef BSP_DEFINES_ONLY 
      LEDS_ON(LEDS_MASK);
 #else
    UNUSED_VARIABLE(bsp_indication_set(BSP_INDICATE_FATAL_ERROR));
   
   // This call can be used for debug purposes during application development.
   // @note CAUTION: Activating this code will write the stack to flash on an error.
   //                This function should NOT be used in a final product.
   //                It is intended STRICTLY for development/debugging purposes.
   //                The flash write will happen EVEN if the radio is active, thus interrupting
   //                any communication.
   //                Use with care. Uncomment the line below to use.
   //ble_debug_assert_handler(error_code, line_num, p_file_name);
 #endif // BSP_DEFINES_ONLY

// The following variable helps Keil keep the call stack visible, in addition, it can be set to
// 0 in the debugger to continue executing code after the error check.
volatile bool loop = true;
UNUSED_VARIABLE(loop);

m_error_code = error_code;
m_line_num = line_num;
m_p_file_name = p_file_name;

UNUSED_VARIABLE(m_error_code);
UNUSED_VARIABLE(m_line_num);
UNUSED_VARIABLE(m_p_file_name);
__disable_irq();

Custom_Error_Handle();//use NVMC save data to flash.

while(loop);
#endif // DEBUG
}

[Vidar Berg]

Yes, this is what I meant. You may have to disable the softdevice as well to access the NVMC peripheral (before interrupt disable). That can potentially be a problem depending on what assert you got.