18F4550 digital input

[mbw123]

Thanks,

I put that in but I am still having problems. I think it has something to do with the serial port. I have connected the RTS line to porta.0. When I measure the voltage with a voltmeter with RTS on it says 10 volts. Is that too much for the PIC to handle? Also when RTS is off it says -10 volts. Is that a problem?

Once again I apologize if this is very simple and I am wasting your time.

Thanks.

-Mike

[skimask]

Thanks,

I put that in but I am still having problems. I think it has something to do with the serial port. I have connected the RTS line to porta.0. When I measure the voltage with a voltmeter with RTS on it says 10 volts. Is that too much for the PIC to handle? Also when RTS is off it says -10 volts. Is that a problem?

Once again I apologize if this is very simple and I am wasting your time.

Thanks.

-Mike

Not wasting my time, but it sounds like you're wasting your PIC with those 10v.
Let me guess...you're not using a MAX232 or at least a series resistor like the green manual says...