Hi Darrel, your program is great.
I try it in two ways:

First: i kept the same program in the PIC, (i must send a packet from the PC then the PIC reply), so i run my program and yours since the 2 programs can see the packets together.. anyway the 2 programs wrote the same values, same speed about 340 packets/s.

Second: i changed the PIC program and make it sending packets alone (as you asked) with no delays, just send in a true loop, your program gave me values between 514 and 526 packets/s...

What do you think about it, why i didn't reach 680 packets/s ... i am new with USB, maybe you have better explications... Thank you very much.

Anyway to have better speed which method i must use ( let's say i need about 1000 packets/s), don't worry about the PIC because there is nothing to do it is just a USB to CAN converter, so once the USB packet arrived: the PIC send it throw CAN .....


Thank you again.