NRF52833 BUTTONLESS DFU Problem

RE: NRF52833 BUTTONLESS DFU Problem

Ben_M — Fri, 06 Sep 2024 01:23:34 GMT

It works！
Thank you very much for your timely assistance with the DFU issue.

Best Regards,
Ben

RE: NRF52833 BUTTONLESS DFU Problem

Vidar Berg — Wed, 04 Sep 2024 13:23:47 GMT

Hi Ben,

The files I linked to are on a newer version which includes several other changes which are not trivial to backport to your current version.

If you want to stay on SDK version 2.3.0, I recommend you add this mechanism yourself by adding a function that reads the GPREGRET register and returns 'true' if the DFU flag has been set.

if (<gpregret flag is set> && 
    !boot_skip_serial_recovery()) {
        ifdef CONFIG_MCUBOOT_INDICATION_LED
        gpio_pin_set_dt(&led0, 1);
#endif

        mcuboot_status_change(MCUBOOT_STATUS_SERIAL_DFU_ENTERED);

        BOOT_LOG_INF("Enter the serial recovery mode");
        ...

Best regards,

Vidar

RE: NRF52833 BUTTONLESS DFU Problem

Ben_M — Wed, 04 Sep 2024 04:33:13 GMT

Hi, Vidar

Thanks for your answer!

I just replace the two files in bootloader folder("bootloader/mcuboot/boot/zephyr") by the files you added, BUT It build error as follow when I replaced. Should I need add any other config parameter in "mcuboot.conf" ?

ncs/v2.3.0/bootloader/mcuboot/boot/zephyr/main.c:477:17: warning: implicit declaration of function 'FIH_DECLARE'; did you mean 'Z_ISR_DECLARE'? [-Wimplicit-function-declaration]
477 | FIH_DECLARE(fih_rc, FIH_FAILURE);
| ^~~~~~~~~~~
| Z_ISR_DECLARE ncs/v2.3.0/bootloader/mcuboot/boot/zephyr/main.c:477:17: error: 'fih_rc' undeclared (first use in this function); did you mean 'fih_eq'? 477 | FIH_DECLARE(fih_rc, FIH_FAILURE); | ^~~~~~ | fih_eq

I would be grateful if you could give me any hints!

Best Regards!

Ben

RE: NRF52833 BUTTONLESS DFU Problem

Vidar Berg — Tue, 03 Sep 2024 11:39:38 GMT

Hi,

The bootloader in SDK v2.3.0 does not implement support for this entrance mechanism. I.e. it does not read the GPREGRET register on startup. Support for this was added by this commit: https://github.com/nrfconnect/sdk-mcuboot/commit/b3e3ce39f3e1abd95ff4010263b3613edf59dd54

The easiest solution is to either upgrade to a newer SDK version, or modify your bootloader/mcuboot/boot/zephyr/main.c file.

Best regards,

Vidar