USB Dfu cause hash not match issue.

[weizhen]

hi,

I am working on nrf52833 dfu. right now I received an error 

raise NordicSemiException('Extended Error 0x{:02X}: {}'.format(resp[3], data))
pc_ble_driver_py.exceptions.NordicSemiException: Extended Error 0x0C: The hash of the received firmware image does not match the hash in the init packet.

it happened when 96% finished.

my dfu memory settings is :

FLASH (rx) : ORIGIN = 0x74000, LENGTH = 0xA000
RAM (rwx) : ORIGIN = 0x20002ae8, LENGTH = 0x1d518
uicr_bootloader_start_address (r) : ORIGIN = 0x10001014, LENGTH = 0x4
bootloader_settings_page (r) : ORIGIN = 0x0007F000, LENGTH = 0x1000
uicr_mbr_params_page (r) : ORIGIN = 0x10001018, LENGTH = 0x4
mbr_params_page (r) : ORIGIN = 0x0007E000, LENGTH = 0x1000

and my application is :

FLASH (rx) : ORIGIN = 0x27000, LENGTH = 0x4D000
RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 0x20000

[Edvin]

This means that the init packet is ok, since it didn't stop immediately (close to 0%). At this point you have transferred the entire image, but the CRC doesn't match the CRC from the signature, meaning you have some bit errors (or missing pieces) in your image when it is transferred to the nRF. 

Can you please try to use the _debug bootloader project and monitor the log from the bootloader on the nRF itself?

Also, can you try to add the flag "-prn 256" in your "nrfutil dfu usb-serial ..."call? Does that change anything?

BR,

Edvin

[weizhen]

after adding "-prn 256" then it can flash 98%

[weizhen]

I try to use pca10100e_usb_debug example and convert it to nrf52833. it works, I can flash all the code. but the application code is not runing.
I use "nrfutil pkg generate --hw-version 52 --sd-req 0x00 --sd-id 0xCA --softdevice <softdevice file> --application-version 1 -- application <hex file> --key-file <priv.pen file> <output>" to generate the .zip file.

[Hung Bui]

Hi Weizhen, 

I'm taking over Edvin as he is taking vacation. 
Could you please explain a little bit what you want to do DFU ? Are you planning to do DFU for only application or application + softdevice. 
I would suggest to test doing DFU with only application first. If you do that you don't need to specify the softdevice.
You can follow my blog here: https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader

[weizhen]

I tried, with the application only, the application is still not running