On Jan 12, 2007, at 12:43 PM, Przemyslaw Lopaciuk wrote: > It works perfectly on PC but when I use my board it doesn't. > When using the board I can get through step 1 and step 2. I > can't get the 8 bytes from thep 4 though. When I test the > board connecting it to PC the data goes through correctly. > While everyone else is questioning the electrical setup, I thought I'd throw out that an 8byte transmission will overrun the "FIFO" of the typical microcontroller UART, but not the deeper FIFO of the usual PC serial port. The prior interactions were short enough that handling received data bytes too slowly wouldn't matter. BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist