Serial port problems

[davidMoore]

Hi,

I'm trying to send some information from a PIC16F688 to my PC, and it doesn't work.
I'm using a PCW C compiler: IDE Version 3.43, PCB Version 3.202, PCM Version 3.302, PCH Version 3.202

The code I'm using sends a character each 4 secs and also flashes an LED at the same rate (just to verify that the program is running).

The problem is that if I comment the #use rs232 line and the putc line, I see the LED flashing. However when I uncomment those 2 lines, I neither see the LED flashing nor the character arriving to my PC.

The code goes as follow:

#include <16F688.h>
#device ICD=TRUE
#fuses PUT,INTRC,NOWDT,NOPROTECT
#use delay(clock=8000000)
//#use rs232(baud=9600, xmit=PIN_C4, rcv=PIN_C5, ERRORS)

void main()
{

int i;
i = 1;

while(TRUE)
{

if (i==1)
{
output_low(pin_A0);
i = 0;
}
else
{
output_high(pin_A0);
i = 1;
}

//putc('x');
delay_ms(4000);
}

}

I'm using TTL/RS232 to do the level conversion. I also tried removing that converter chip, and nothing changed, I replaced it, nothing changed. I replaced the PIC, nothing change..., I tested the serial port on my computer and it is working, I changed serial port in my computer, but nothing changed.

Any idea what I'm doing wrong ?

Regards,

David

[Ttelmah]

Have you got the special 20pin ICD chip?. If not, having the ICD fuse set will cause no end of problems.
Does the flash occur at the expected rate (4 seconds on, 4 seconds of)?. If not, add a 'setup_oscillator' line. I thought that 3.202, was 'before' handling this automatically was reliable.

Best Wishes

[PCM programmer]