Using app_with_dfu jump to bootloader.

[Coldson]

Hi all:

I use the softdevice 2.0.0 and compile bootloader example with "dual bank" on the nrf52 DK,

Running a system that can using DFU from app then jump to bootloader as example hrm did.

After I have a deep study it, I found out that:

1. DFU will sign a value "BOOTLOADER_DFU_START" into "GPREGRET".

2. it will restart using "bootloader_util_app_start(NRF_UICR->NRFFW[0]);" into bootloader.

3. While into bootloader, the main function will check the sign on "GPREGRET"(bool app_reset = (NRF_POWER->GPREGRET == BOOTLOADER_DFU_START);)

4. The DFU flow just as the picture below.

5. And the problem is: it will stuck at dfu_ble_svc_peer_data_set(&m_peer_data); --> dfu_app_handler.c line 110

6. the nrftool DFU on my iPhone will show:

7. If I mark the step 5. line 110, and it will went to the function: "bootloader_util_app_start(NRF_UICR->NRFFW[0]);", but nrftool app on my iPhone still show "Enabling DFU Bootloader"

I think that did not really jump into bootloader, but why? What should I check?

Please correct me if I misunderstanding the DFU flow.

Thx for everyone willing to help me solve this problem.

Update 2016/06/27:

There're no return error code after that break point: err_code = dfu_ble_svc_peer_data_set(&m_peer_data);

and the variable m_peer_data is:

[Coldson]

Add comment:

    else
    {
        // Keys were not available, thus we have a non-encrypted connection.
        err_code = dm_peer_addr_get(&m_dm_handle, &m_peer_data.addr);
        APP_ERROR_CHECK(err_code);

        err_code = sd_softdevice_vector_table_base_set(NRF_UICR->NRFFW[0]);
        APP_ERROR_CHECK(err_code);
        
        err_code = dfu_ble_svc_peer_data_set(&m_peer_data);
        APP_ERROR_CHECK(err_code);
    }

don't forget to add to this line also.

Fixed!!!!!!!!!