ota over serial merging with application

RE: ota over serial merging with application

Vidar Berg — Thu, 30 Jul 2020 06:33:55 GMT

Hi,

It could be that the update is rejected by the bootloader. In that case, the bootloader will boot the old application again. Are you able to debug the bootloader to see if maybe the pre-validation step is failing (nrf_dfu_validation.c->nrf_dfu_validation_init_cmd_execute)?

RE: ota over serial merging with application

sowmiya — Wed, 29 Jul 2020 16:06:10 GMT

hai,

at first merged secure uart bootloader.hex code and softdevice.hex together

and flashed the hex file to the board .

now my device is in bootloader mode then i send a application file over serial ,

then device running in application.

then changed to bootloader mode the code is attached below.it is not entering into with2-3 seconds changing again to application mode

whats the mistake here ?

could you please what to do ?

#define BOOTLOADER_DFU_START 0xB1

void boot_mode()
{
    printf("ENTER IN BOOTLOADER MODE!!!!!\n");
         err_code = sd_power_gpregret_clr (0, 0xff);
 APP_ERROR_CHECK(err_code);
err_code = sd_power_gpregret_set(0, BOOTLOADER_DFU_START);
 APP_ERROR_CHECK(err_code);

    //  NRF_POWER->GPREGRET = BOOTLOADER_DFU_START;

 nrf_delay_ms(100);

              NVIC_SystemReset();
              }

RE: ota over serial merging with application

Vidar Berg — Tue, 28 Jul 2020 10:51:57 GMT

Hello,

[quote user=""]completed with serial. but when i am merging the code its not entering the boot loader mode.[/quote]

Is the Softdevice enabled when you write to NRF_POWER->GPREGRET register? The Softdevice reserves access to the POWER peripheral so you can only access it through the sd_power_gpregret_set() function.