16f877 portc.6 & portc.7

[DavyJones]

hello all. I've got a question I hope will give me the answer I am looking for. Is there anyway to initialize portc.6 and portc.7 on the 877 to use as simple outputs to light a couple led's? I'm hoping I won't have to etch another board. I know I should have looked before I did that but I didn't now I'm stuck. trisc = %0000000 seems to initialize the first 6 portc.0 through portc.5 and I can trigger those to light led's but 6 and 7 won't. I'm sure it's because they are typically used for txd and rxd. I'm hoping there is a way.
Thanks in advance
David

[mackrackit]

trisc = %0000000

Should do it. What else is in your code?

[DavyJones]

Thanks for the response.
I wrote this little test after I realized I used those pins. When this is running led's 0 through 5 will turn on for .5 seconds then go off. but 6 and 7 stay off.

Define ONINT_USED 1
i var byte ' Define loop variable
TRISC = %00000000 ' Set PORTD to all output
FOR I = 0 TO 7
PORTC.0[I]=1
NEXT I
LOOP: Pause 1000
For i = 0 to 7 ' Go through For..Next loop 7 times
PORTC.0[I] = 0
Pause 500
PORTC.0[I] = 1 ' Delay for .5 seconds
Next i
Goto loop ' Go back to loop and blink LED forever
End

[mackrackit]

Well I do not see the problem.

Try this and see what happens.

LOOP:
HIGH PORTC.6
HIGH PORTC.7
PAUSE 100
LOW PORTC.6
LOW PORTC.7
PAUSE 100
GOTO LOOP

[DavyJones]

mackrackit thanks for the assistance

I tried the HIGH PORTC.6 and LOW PORTC.6 loop and still nothing the led's remain off. I don't need to have an pull up or pull down resisitors on those pins do I?

Thanks
David

[mackrackit]

need to have an pull up or pull down resisitors on those pins do I?

No, the LED with its resistor takes care of that.
Now I have to ask the ...
Are you sure you are using the correct pins?
Have you checked the LEDs?
and so on...

With TRISC set for out or in, these to pins act as far as I know like any other, The TX/RX has to be defined.

Can you post you layout(schematic or picture)?