USB RX problem

Kurt Jensen

According to INTSRCR (0x00080200) I get an RX interrupt on EP1. But sometimes when I check the endpoint status, PERI_RXCSR, there are no bits set. According to the PC, a packet was sent, but, since PERI_RXCSR is zero, I do not receive the packet.

Any idea how this could be happening?

over 13 years ago

0 RandyP over 13 years ago

TI__Guru* 84110 points

Kurt,

Which DSP device are you using?

Are you running this on one of our EVM / DSK / Experimenter boards?

What are you using for drivers for the USB port? And which version?

Regards,
RandyP

0 Kurt Jensen over 13 years ago in reply to RandyP

Genius 5040 points

1) c6748

2) no, I am running my hardware.

3) using c6748 StarterWare 1.20.02.02 librariwa to handle the USB

0 RandyP over 13 years ago in reply to Kurt Jensen

TI__Guru* 84110 points

If it works sometimes, then your software flow has some validation. I would try to get a correlation between the packet sent and the failure-to-receive. Look for noise and levels on your clocks and power supplies, and on the USB signals themselves.

Is "librariwa" two words that are pushed together?

0 Kurt Jensen over 13 years ago in reply to RandyP

Genius 5040 points

3) using c6748 StarterWare 1.20.02.02 libraries to handle the USB

"wa" == ("es" << one key)...

Thank you.

0 RandyP over 13 years ago in reply to Kurt Jensen

TI__Guru* 84110 points

Is your question really answered?

Processors

Processors forum

USB RX problem