Flash write fails when using mcumgr from zephyr to upload an image

[raphaZahnd]

I'm using the nucleo-H753ZI board to test mcuboot.

The setup works and I can successfully run the bootloader and the application in slot0_partition using zephyr sysbuild.
However when trying to upload an image I get the following flash write error:

[00:00:29.758,000] <inf> mcuboot_util: Image index: 0, Swap type: none
[00:00:29.758,000] <inf> mcuboot_util: Image index: 0, Swap type: none
[00:00:29.922,000] <err> flash_stm32h7: Status Bank2: 0x00040000
[00:00:29.922,000] <err> STREAM_FLASH: flash_write error -5 offset=0x00100000
[00:00:29.922,000] <err> mcumgr_img_grp: Irrecoverable error: flash write failed: 12

Here is my flash0 dts:

&flash0 {

partitions {

compatible = "fixed-partitions";

#address-cells = <1>;

#size-cells = <1>;

boot_partition: partition@0 {

label = "mcuboot";

reg = <0x00000000 DT_SIZE_K(128)>;

};

slot0_partition: partition@20000 {

label = "image-0";

reg = <0x00020000 DT_SIZE_K(896)>;

};

slot1_partition: partition@100000 {

label = "image-1";

reg = <0x00100000 DT_SIZE_K(896)>;

};

storage_partition: partition@1e0000 {

label = "storage";

reg = <0x001e0000 DT_SIZE_K(128)>;

};

};

};

I have also attached the .config file from the build output as reference.

Appreciate any help to get this resolved. I assume it is some KCONFIG settings which is causing this.

[raphaZahnd]

Unfortunately I'm still stuck with the flash write error during a application image upload with mcumgr. Any help would be appreciated. Thanks!

[raphaZahnd]

Having both slots in bank1 fixes the issue and I can successfully upgrade the firmware with the mcumgr and there is NO flash write error: [00:00:29.922,000] <err> flash_stm32h7: Status Bank2: 0x00040000 (PGSERR).

However that let's me waste the other 1MB of flash in bank2. So still unclear why writing into bank2 doesn't work while writing into bank1 works.

[raphaZahnd]

Turns out it was a stm32_flash driver bug in the zephyr repo recently fixed: https://github.com/zephyrproject-rtos/zephyr/commit/ea1245eb92000d3fe24d2b974754714973ce5ab1 Works with this fix also when slot2 is in bank2!