STM32 USB CDC receiving more than 64 bytes

[Duy Tran]

Hello,

I am using the USB CDC of NUCLEO-F767ZI board. MY firmware can transmit and receive OK through the USB CDC. However, I cannot receive more than 64 bytes, only the first 64 bytes are received. The transmission is OK, it can send more than 64 bytes.

I tested with Hercules, Tera Term, Putty and the results are the same.

Do you have any idea what I missed or did I do anything wrong?

Thanks and best regards,

Duy

[Pavel A.]

Same issue as in this question. Looks like bug.

-- pa

[Duy Tran]

Still debugging but no idea why. I tried different COM port software also.

[Imen.D]

Hello,

Which firmware package are you using ?

I will raise this internally for check and come back to you soon.

Best Regards,

Imen

[Imen.D]

Could you please use the provided USB CDC application available on the Firmware package ? we are not expecting to run into this issue using cube firmware.

Then, please keep us about your progress on this.

[Duy Tran]

Hello Imen,

Thanks for your feedback, I am using STM32Cube_FW_F7_V1.16.0.

Best regards,

Duy

[Duy Tran]

I don't see any example using CDC alone for the Nucleo-F767ZI. If possible, can you provide me the one you are testing?

Thanks.

[Imen.D]

You may get inspired and re-use sections from the CDC example available on Eval project.

Are you using STM32CubeMX in your own project ?

[Duy Tran]

Yes I am using STM32CubeMX and STM32CubeIDE in my project, still porting the example and make it run on my Nucleo.

[Imen.D]

Hi @Duy,

Please share your ioc file, this will help our CubeMX team to check and analyze your issue.

Best Regards,

Imen