I'm trying to interface a Centronics to send text to printer with OPB Bus. I have used the wizard of EDK.
I have realized Centronics protocol with 3 registers: 1 for datas, 1 for reading signal from printer, 1 for sending signal to printer.
But when I try to sintetize I receive the following error message: Error:Xst:528 Many sources on the signal
I have used the following code to send datas from printer to fpga::
signal_name