10F202 I/O problem

[SveinR]

Hi!

I'm just playing around with the !0F202, and I cant get det GP2(B2) pin to act as an output, only as an input.. I have made an silly easy code to only blink with some leds to test this..

"
#include "10F202.H"
//#fuses NOBROWNOUT,NOMCLR,NOWDT,NOPROTECT,NOPUT
// Skal benytte 4MHz kystall.
#use delay (clock=4000000)

PORT_B_PULLUPS(TRUE);


void main(void) {

while (TRUE) {

// BLITZ BLÅ LYS

output_bit( PIN_b0, 1);
output_bit( PIN_b1, 0);
output_bit( PIN_b2, 1);

delay_ms (50);

output_bit( PIN_b0, 0);
output_bit( PIN_b1, 1);
output_bit( PIN_b2, 1);


delay_ms (50);


}
}//Slutt main()

"

Using CCS v 3.212

Regards
Svein

[PCM programmer]

I don't have the PCB compiler, so I can't check the ASM code,
but it's possible that CCS doesn't initialize the OPTION register
properly. Upon power-up reset, the OPTION register is initialized
to all 1's. This will make GP2 into an input. It overrides the
normal TRIS.

To fix this problem, you need to set the T0CS bit in the OPTION
register = 0. This requires ASM code. CCS has a macro for this,
as shown below.

Try adding the following code to your program and see if it works.
I've also set it to enable the pullups, because you showed that
you wanted to do that in your post.

[SveinR]

Okey!! I will try this when I get home from work. THANKS

But in that TRIS register, do it control the other pins? And do you set the GP0 an GP1 also as output??

Why wont the SET_TRIS_B comand work?

Regards

[SveinR]

It works!!! THANKS A LOT