Bootloader dfu

RE: Bootloader dfu

ponlakshmi — Thu, 25 Feb 2016 15:20:16 GMT

Finally It worked.Thanks for the Help.

RE: Bootloader dfu

Vidar Berg — Thu, 25 Feb 2016 08:27:16 GMT

Another approach is to set the flag using nrfjprog after programming SD+BL+APP:

nrfjprog --memwr 0x3FC00 --val 1
nrfjprog -r

You can use read the memory afterwards to confirm that the flag is set:

nrfjprog --memrd 0x3FC00 // should return 1 for both mentioned methods

RE: Bootloader dfu

ponlakshmi — Thu, 25 Feb 2016 07:06:49 GMT

I have added that line in bootloader_settings.c and I removed the NOLOAD Directive from the dfu_gcc_nrf51.d.But it still advertise as DfuTarg after flashing Softdevice,application and bootloader.But i want it to be in application code.After enabling dfu service it should go to Bootloader mode.Could you suggest me any another method.

RE: Bootloader dfu

Vidar Berg — Wed, 24 Feb 2016 11:44:51 GMT

Like this:

__attribute__ ((section(".bootloaderSettings")))  volatile uint8_t m_boot_settings[CODE_PAGE_SIZE] = {BANK_VALID_APP};

Also, with GCC you need to remove the NOLOAD directive from the bootloaderSettings section in dfu_gcc_nrf51.ld

RE: Bootloader dfu

ponlakshmi — Wed, 24 Feb 2016 08:26:28 GMT

Can u explain me the second method.What does mean by Attribute.How to implement that.

Second Method

Modify the bootloader firmware to write 0x01 to that address using attribute . It's the same way as we did on writing to NRF_UICR_BOOT_START_ADDRESS the value of BOOTLOADER_REGION_START (see bootloader_setting_arm.c)

RE: Bootloader dfu

Vidar Berg — Wed, 24 Feb 2016 08:07:55 GMT

I think answer 'E' in this FAQ should answer you question.