Problem with 16F648A

[ngeronikolos]

falingtrea,

The condition IF PORTA.1 = 1 never goes true either using 5vdc.I do not think that is level "1" the problem.

I will try to de-install the Microcode Studio Plus + pICKIT2 because it seems to me that the problem is from the pc.

If someboby have any other idea please advice

Regards
Nikos

[falingtrea]

falingtrea,

The condition IF PORTA.1 = 1 never goes true either using 5vdc.I do not think that is level "1" the problem.

I will try to de-install the Microcode Studio Plus + pICKIT2 because it seems to me that the problem is from the pc.

If someboby have any other idea please advice

Regards
Nikos

This may be a stupid question but have you verified that the signal on PortA.1 is working the way you expect it? What is driving this pin? If it is some kind of open-collector output, for instance, it needs a pullup in order to generate a '1'. I always check the hardware before I assume there is a problem with the software. I can't remember how many times I have put the wrong kind of signal on a pin and wondered why the software did not work.

[ngeronikolos]

Finally falingtrea show me the way to solve my <<stupid>> problem.
I add pull down resistor to PORTA.1...and that's it.ok

HARDWARE
Thanks boys
Nikos