DFU Bootloader hangs on sd_softdevice_vector_table_base_set

[TEJ]

I have implemented a boot loader for DFU based on the sdk v6.1 DFU project. After a when an upgrade is triggered within the application soft reset by the application:

    err_code = sd_power_gpregret_clr(0xff);
    APP_ERROR_CHECK(err_code);
    err_code = sd_power_gpregret_set(BOOTLOADER_DFU_START);
    APP_ERROR_CHECK(err_code); 	
    NVIC_SystemReset();

The boot loader, which is basically a copy of the sdk example, then within ble_stack_init() calls sd_softdevice_vector_table_base_set() and hangs in the SVC_Handler callback in arm_startup_nrf51.s

When cold booting the device, the boot loader runs flawless.

Am I missing some step in the reset procedure?

Should I have a special case in the boot loader to detect soft reset?

[Hung Bui]

[EDITED] Hi TEJ,

It's our modification with the bootloader. Now the bootloader can be triggered directly from the application. The softdevice will not be reinitialized when bootloader starts if it's jumped from the application that's why you got a hardfault because in your case you reset the chip and the softdevice is disabled. So in order to start the bootloader from application NVIC_SystemReset() should not be called , instead please follow this documentation

[TEJ]

I can confirm that removing the if(init_softdevice) solves the issue.

[Hung Bui]

Hi TEJ, I just updated the answer, could you please also update (or delete) your comment ?