Dear all, Thanks a lot for every consecutive help i get from this forum and a special thanks to Tsuneo.
I downloaded VCOM example program from keil but that doesn't fits to my requirement.
The code doesn't work if I transmit the data as soon as i receive the IN interrupt.
I want to transmit 64bytes in 1 ms. i tried changing the usbdesc.c but it doesn't transmits the data at this rate and makes the PC to go hang.
My minimum requirement is to tranmsit 30KBytes/sec.
I highly appreciate your help.
I have an appalling experience with usbser.sys. It is by far the worst driver I ever encounter! I kept on asking myself: "why does microsoft even support USB if they do not implement the protocol fully?!". blue screens on win2k but not on XP (which was not fully functional either!), program failures, you name it. a total disaster!