TM4C129XNCZAD: A USB high pressure test with TM4C

ray yang

Part Number: TM4C129XNCZAD

Hi ,

My client uses a PC APP, which sends 1000 packets per second to TM4C via USB CDC mode,

The test result is that the MCU crashes,

What is the way to protect the TM4C to avoid this situation, thanks.

Many thanks,

Ray Yang

0 Ralph Jacobi over 3 years ago

Hello Ray,

What are the packet sizes for this? 64 bytes? 256 bytes? Over which endpoint is it being sent?

There's really not a lot of information here for me to comment on this.

We have had other customers stress test the USB stack, but I don't recall any issues with USB full speed.

Best Regards,

Ralph Jacobi

0 ray yang over 3 years ago in reply to Ralph Jacobi

Hi Ralph,

The app sends the data every 256 bytes@1 ms, but the packet sizes are 64 bytes from USB library.(@line 447 )

The endpoint is default.

Ray Yang

0 ray yang over 3 years ago in reply to ray yang

Hi Ralph,

The app sends the data every 256 bytes@1 ms, but the packet sizes are 64 bytes from USB library.(@line 447 )

The endpoint is default.

from Teledyne LeCroy USB Protocol Suite

Ray Yang

0 Ralph Jacobi over 3 years ago in reply to ray yang

Hi Ray,

Oh, you have a LeCroy analyzer handy...! That is very helpful then, can you get a capture of the test and the failure and attach it?

I have the same analyzer and I can review the capture file then and see what I can uncover.

Best Regards,

Ralph Jacobi

0 ray yang over 3 years ago in reply to Ralph Jacobi

Hi Ralph,

When I get the test program and capture the USB packets,

I will provide you with the information, thank you.

Best Regards,

Ray Yang

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