fan-out buffer problem and LCD question(DE2 - quartus 10.1)

Altera_Forum · ‎04-10-2011

Im trying to assign two input pins(general purpose IO pin and RS232 RX) and two output pins(general purpose IO pin and RS232 TX) for the NIOS UART module. when i try to do this i get the error

Error: Net "rxd_to_the_UART", which fans out to "NIOSL2:inst|rxd_to_the_UART", cannot be assigned more than one value
    Error: Net is fed by "inst18~COMBOUT"
    Error: Net is fed by "inst17~COMBOUT"

i tried assigning an input buffer(alt_inbuf) but i get a similar error. what do i do? :confused:

and on an unrelated issue, would there be a problem is i assign two vcc pins for the LCDON and LCD backlight on pins? and i also assigned a ground pin to the Read/Write pin cause im not planning to do any read operation and made the data bus uni-directional. is there any problem with this configuration?

Altera_Forum · ‎04-10-2011

i just figured i asked two stupid questions hehe

well the fan our problem could be solved using a simple or gate to or the inputs. and as for the lcd i switched to the lcd module provided in the university program ip core which does pretty much everything for you..

thanks anyways :)