DFU problem (nRF5 SDK v14.2.0)

[Ludwig POILVE]

Hello I'm a beginner and I try to use the DFU. I use the  documentation and I can send my init packet without any problem. But when I try to send my Firmware I have 2 problems. First one is I can't create an object with a size sup as 256. And the second is my command execute send me the 05 error. Can you help me to learn how to fix that please ?

[Ludwig POILVE]

My problem is solve, I was just writing to 01 instead of 02 when I was trying to send the FW. Now I have a problem with the CRC-32 : How the device calculate it ?

[Sigurd]

Ludwig POILVE said:

How the device calculate it ?

The bootloader uses the function crc32_compute() to calculate the CRC-32.

Ludwig POILVE said:

Now I have a problem with the CRC-32

Please explain what problems you have with the CRC-32. Wild guess, but maybe you are running into the same problem as seen in this post?