PORTA output problem

[skyrock]

Hello all,

I'm facing a problem which PORTA is not working properly. Can anyone tell me if PORTA,4 would work as output if I have an external crystal and TMR1 working?

I've made TRISA b'00001111', I suppose I would still be able to use RA4 as output? But still there isn't any voltage coming out from RA4 after I turned it on. RA6,7 is used for external crystal.

I've uploaded the full code if anyone wants to check it out.

 

[Nigel Goodwin]

A4 is an open-collector output (read the datasheet), you need a pullup resistor to use it as a normal output.

 

[skyrock]

thanks, got it now.