Adapting YMODEM to work with USB-CDC Class (on Microcontroller) .

[JChou.1]

Intergrated USB in SBSFU for FW update, and adapting it to work with YMODEM protocol. Only half of the package is downlaoding to microcontroller. Getting error. I will highly appreciate for any help. = [SBOOT] STATE: HANDLE CRITICAL FAILURE

= [EXCPT] COM ERROR DURING DOWNLOAD !

= [SBOOT] STATE: REBOOT STATE MACHINE

========= End of Execution ==========

with regards

Jitu

[Jocelyn RICARD]

Hello Jitu,

I'm sorry, I don't catch your issue.

What do you mean by "Integrated USB in SBSFU" ?

Best regards

Jocelyn

[sackmea]

I am trying to implement the SBSFU to use USB instead of UART and it is failing too. It is going into the default case of the Ymodem receiver code many times hence aborting the process. Do we have an example that is using USB and works please?

[thomas239955_stm1_st]

Hi there,

I am trying to do the same thing, did you manage to find a solution? I get stuck after a couple of successful transfert, I think the CRC check goes wrong.

Thanks in advance