RE: A question about ota

John — Tue, 03 Mar 2015 13:19:13 GMT

Looks about right. It is very similar to what I do to enter the bootloader by host command.

RE: A question about ota

kk — Tue, 03 Mar 2015 07:26:40 GMT

I think I got the right answer after reading the similar question in forum. And my solution is:

about application code,just set the NRF_POWER->GPREGRET=1 and on power reset the chip is enough:
```
   sd_softdevice_disable();	 
   NRF_POWER->GPREGRET = 1;
   NVIC_SystemReset();
```

or just use

       sd_power_gpregret_set(1);

if you don't disable the softdevice;

about bootloader, set the NRF_POWER->GPREGRET=0 is enough:

replace the code like this:

    uint32_t a;
    sd_power_gpregret_get(&a);
    if (bootloader_is_pushed || (!bootloader_app_is_valid(DFU_BANK_0_REGION_START)) || (a == 1))
    {
         nrf_gpio_pin_set(LED_2);

         sd_power_gpregret_set(0);

        // Initiate an update of the firmware.
        err_code = bootloader_dfu_start();
        APP_ERROR_CHECK(err_code);

        nrf_gpio_pin_clear(LED_2);
     }

If something is wrong or missing, please point it out. Thank you very much!