How can i convert USB DFU code from pca10056_usb to pca10040 ?

[Shweta]

Hello ,

I want to convert the code of dfu pca10056_usb to pca10040 for this i have updated the following -

1. Updated board from PCA10056 to PCA10046

2.Updated the linker.

But I am getting this error 

where im missing 

[Hung Bui]

Hi Shweta, 

Could you please let us know what you want to achieve ? 
Why do you want to have USB DFU support on PCA10040 when the nRF52832 doesn't have USB support ? 

If you want to do UART DFU you can use the \examples\dfu\secure_bootloader\pca10040_uart example. 

[Shweta]

Hello Hung Bui,

First of all my bad let me rephrase the problem statement.

I am having MDBT50Q-U(nrf52833) and want to perform USB DFU.

As there is no example code directly usable in nRF SDK 16.0.0 so I was trying to convert the given code according to my requirement but I was unable to modify compiler and linker settings.

[Hung Bui]

Ok so you want to make the example works for nRF52833. 
I noticed that you set the FLASH_SIZE to 0x7000. On the original firmware for nRF52840 it's 0xa000. This explains why you got the issue with flash when compiling. 
Please try the following setting: 

FLASH_START = 0xC000

FLASH_SIZE= 0xA000

Please use the BOARD_PCA10100 if you want to compile for nRF52833. 

[Shweta]

On the same project I have changed the settings as suggested by you that is(note here i have not changed the board it is here "BOARD_PCA10040" and "NRF52840_XXAA)-

1. 

It build and then starts giving error

 

2. When I change the board to NRF52833xxAA  and BOARD_PCA10100 that is 

it shows following error 

 

[Hung Bui]

Hi Shweta, 

The nRF52833 doesn't have the hardware Cryptocell so you have to select other backend. 
I would suggest you to study the \examples\dfu\secure_bootloader\pca10100e_usb\ in SDK v17.1 .

The sample is made for nRF52820 to run on the PCA10100 which is the DK for NRF52833. 

The only modification as far as I can see to make it run on nRF52820 is to modify the RAM and ROM size and start location of the bootloader.

In the sdk_config.h you will find
NRF_CRYPTO_BACKEND_NRF_SW_ENABLED 1

and 

NRF_CRYPTO_BACKEND_CC310_BL_ENABLED 0.