Combining two applications

RE: Combining two applications

bjorn-spockeli — Thu, 13 Oct 2016 13:25:28 GMT

You also have to edit the bootloader_app_startfunction, as the argument app_addr is not used, i.e.

void bootloader_app_start(uint32_t app_addr)
{
    // If the applications CRC has been checked and passed, the magic number will be written and we
    // can start the application safely.
    uint32_t err_code = sd_softdevice_disable();
    APP_ERROR_CHECK(err_code);

    interrupts_disable();

    err_code = sd_softdevice_vector_table_base_set(0x249f0);//CODE_REGION_1_START
    APP_ERROR_CHECK(err_code);

    bootloader_util_app_start(0x249f0);//CODE_REGION_1_START
}

RE: Combining two applications

bjorn-spockeli — Thu, 13 Oct 2016 13:23:54 GMT

Hi Muckesh, you need to replace DFU_BANK_0_REGION_START with 0x249f0 in the two if statements before NVIC_SystemReset() in main, i.e.

  if (dfu_start || (!bootloader_app_is_valid(0x249f0)))
    {
        nrf_gpio_pin_clear(UPDATE_IN_PROGRESS_LED);

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

        nrf_gpio_pin_set(UPDATE_IN_PROGRESS_LED);
    }

    if (bootloader_app_is_valid(0x249f0) && !bootloader_dfu_sd_in_progress())
    {
        // Select a bank region to use as application region.
        // @note: Only applications running from DFU_BANK_0_REGION_START is supported.
        bootloader_app_start(0x249f0);//DFU_BANK_0_REGION_START
    }

RE: Combining two applications

mukesh — Mon, 03 Oct 2016 07:55:46 GMT

Thank you again. Yes I set the address properly and the switching is working without the DFU. I mean if I upload the program with jprog. But with the dfu, it is getting back to DFU after calling the bootloader_app_start() function. What could be the reason for it?

RE: Combining two applications

bjorn-spockeli — Mon, 03 Oct 2016 07:45:39 GMT

Which start address did you set for the second application when you compiled it? Did you set 0x249F0 as the start address under "Options for Target" --> Target --> Read/Only Memory Areas?

RE: Combining two applications

mukesh — Sat, 01 Oct 2016 06:54:29 GMT

I think the bootloader_util_app_start() function is resetting the device and it is going back to the dfu mode. Is it possible to branch to different address other than 0x16000 from the bootloader.

RE: Combining two applications

mukesh — Fri, 30 Sep 2016 09:57:46 GMT

I tried with mergehex. If I upload the merged hex file using nrfjprog, everything will work fine. That is the application switching is working fine. I but if I do the same with dfu, it won't work. Instead of going to the second code region, it is going back to the dfu mode. I am using this function for doing the application switching

uint32_t err_code = sd_softdevice_disable();
  APP_ERROR_CHECK(err_code);

  interrupts_disable();

  err_code = sd_softdevice_vector_table_base_set(0x249f0);
  APP_ERROR_CHECK(err_code);

  bootloader_util_app_start(0x249f0);

What would be the problem?

RE: Combining two applications

bjorn-spockeli — Fri, 30 Sep 2016 08:30:45 GMT

You will have to update both applications at the time, i.e. merge the two applications to one firmware image and then perform the DFU.

RE: Combining two applications

mukesh — Fri, 30 Sep 2016 05:31:11 GMT

Thanks for the reply. My problem is still not solved. What I wanted to do is, I want to upload the two firmwares with different offset address using the dfu. What is happening is when I upload one firmware, the second one will get erased. I think the bootloader is erasing the entire application area before it does the firmware update. How can I solve this issue?

RE: Combining two applications

bjorn-spockeli — Thu, 29 Sep 2016 11:02:52 GMT

Hi Mukesh,

I suggest that you take a look at this question and answer.

-Bjørn