nrf52810 Not jumping Bootloader from BLE Application

[NikhilVV]

Hi,

Chip : NRF52810

Soft Device : s132_nrf52_5.1.0

SDK : nrf5_sdk_for_thread_and_zigbee_v4.2.0_af27f76 (BLE BootLoader) 

IDE : Segger Embedded Studio

SDK : nRF5_SDK_14.2.0_17b948a (BLE Application) 

IDE : IAR Embedded Workbench

in BLE Application i am trying to reboot and enter to bootloader for serial DFU. 

i have checked in nrf devzone and did some changed as suggested but still it reboot and enter to BLE Application.  

BLE application main.c has been added following codes to set start bootloader 

 sd_power_gpregret_set(1,BOOTLOADER_DFU_START);     // to enable dfu_check true

nrf_nvmc_write_word(0x00022000, (uint32_t) dfu_flag);   // to enable dfu_check true

nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_DFU);     //

NVIC_SystemReset();.   //reboot to jump to bootloader

in Application sdkconfig did following changes.

#define BLE_DFU_ENABLED 1

#define NRF_DFU_BLE_BUTTONLESS_SUPPORTS_BONDS 1

#define NRF_PWR_MGMT_CONFIG_AUTO_SHUTDOWN_RETRY 1

#define NRF_SDH_BLE_VS_UUID_COUNT 2

#define NRF_SDH_BLE_SERVICE_CHANGED 1

#define NRF_SDH_BLE_SERVICE_CHANGED 1

From bootloader dfu_enter_check() nrf_power_gpregret_get() but it never returns true.

also tries to read nvic memory to read flag to make dfu_enter_check true.

uint32_t DFU_Flag_data  = 0;

uint32_t* dfu_flag_mem2 = (uint32_t*) 0x00022000;
DFU_Flag_data = (uint32_t)*dfu_flag_mem2 ;

if(DFU_Flag_data  != 0xFFFFFFFF) dfu_enter = true;

but after NVIC_SystemReset(); the application restart without entering to dfu_check.

how can i verify and enter to bootloader after systemreset().

Both BLE Application and BLE Bootloader is tested individually and works fine.

 

[JoEi]

Hi,

did you clear the register before trying to enter the bootloader?
That's the function I normally use to enter the bootloader:

void app_enter_dfu_bootloader(void)
{
  uint32_t err_code;

  err_code = sd_power_gpregret_clr(0, 0xffffffff);
  VERIFY_SUCCESS(err_code);

  err_code = sd_power_gpregret_set(0, 0xB1);
  VERIFY_SUCCESS(err_code);

  // Signal that DFU mode is to be enter to the power management module
  nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_DFU);
 
  /* this should not be reached! */
  NVIC_SystemReset();
}

Kind regards,
Johannes

[NikhilVV]

Hi,

yes i did.

Here follow the  BLE application Jump Code..

#define BOOTLOADER_DFU_START  0xB1

void Uart_check_rx(void) {
 ...
 
  if(memcmp(command,(uint8_t *)"AT+SERIALDFU",length)==0)
  {
     NRF_LOG_INFO("Command Recived: AT+SERIALDFU?");
     ble_dfu_buttonless_bootloader_start_finalize_local();
     NVIC_SystemReset();
  }
  ..
 }


uint32_t ble_dfu_buttonless_bootloader_start_finalize_local(void)
{
    uint32_t err_code;
    NRF_LOG_INFO("Going to Bootloader Start");

    err_code = sd_power_gpregret_clr(1,0xffffffff);   //
    err_code = sd_power_gpregret_clr(0,0xffffffff);
    
    NRF_LOG_INFO("err code %d",err_code);
    VERIFY_SUCCESS(err_code);
    NRF_LOG_INFO("Register clear Success");

	err_code = sd_power_gpregret_set(1,BOOTLOADER_DFU_START);
    err_code = sd_power_gpregret_set(0,BOOTLOADER_DFU_START);
	
	NRF_LOG_INFO("err code %d",err_code);
	VERIFY_SUCCESS(err_code);
    NRF_LOG_INFO("Register Set Success");
    
	user_write_flash(0x00022000,(uint32_t)0x12341234);

   // m_dfu.evt_handler(BLE_DFU_EVT_BOOTLOADER_ENTER);

    nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_DFU);

    return NRF_SUCCESS;
}  

i have checked gpregister using "nrfjprog --memrd 0x4000051c"  and it returns 0x4000051c : 0xB1

and "nrfjprog --memrd 0x00022000"  returns 0x00022000: 0x12341234.

Even i do  nrfjprog --reset from cmd prompt after setting gpregister and memory location , the BLE application restarts.

In Bootloader i did like this.

uint32_t DFU_Flag_data  = 0;

main() {
	...
	....
uint32_t* dfu_flag_mem2 = (uint32_t*) 0x00022000;
DFU_Flag_data = (uint32_t)*dfu_flag_mem2 ;
	...
	....
}

extern uint32_t DFU_Flag_data;

ret_code_t nrf_bootloader_init(nrf_dfu_observer_t observer) {
	...
	....
	..

    switch (activation_result)
    {
        case ACTIVATION_NONE:
            initial_timeout = NRF_BOOTLOADER_MS_TO_TICKS(NRF_BL_DFU_INACTIVITY_TIMEOUT_MS);
            dfu_enter       = dfu_enter_check();

           if(DFU_Flag_data != 0xFFFFFFFF) {
              dfu_enter = true;
            }

	...
	}
	...
	if(dfu_enter) {
		// enter to dfu
	} else {
		//start application
	}
}


static bool dfu_enter_check(void) {
    if (NRF_BL_DFU_ENTER_METHOD_GPREGRET &&
       (nrf_power_gpregret_get() & BOOTLOADER_DFU_START))
    {
        NRF_LOG_DEBUG("DFU mode requested via GPREGRET.");
        return true;
    }
}

sdk_config.h
#define NRF_BL_DFU_ENTER_METHOD_GPREGRET 1

#define NRF_BL_DFU_ENTER_METHOD_BUTTONLESS 1

Anything else is missing in application or Bootloader settings ?