Getting Garbage from RS-232

[Zulander]

Hi, i am tring to get my PIC16F690 to commuicate with my PC using MAX232, i am able to connect to the PIC, all i am getting is garbage.. i am getting extended ASCII code... ican't find any information on solving the problem..

please help me!!!!

this is my code:
-----------------------------
#include "C:\Documents and Settings\Rohan\Desktop\PicTest\test.h"

#bit C1=0x7.0
#bit C2=0x7.1
#bit C3=0x7.2

void main() {

int xBlinker=0; // Create Variable
Int Xcounter=0;

setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF);
setup_spi(FALSE);

setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_oscillator(OSC_8MHZ);


set_tris_a(C1);
set_tris_b(C2);
set_tris_c(C3);


while (Xcounter <=257)
{

xCounter+=1;

delay_ms(1);

//Create Auto switch !
if (xBlinker==0) {
printf("LED ON");
C1=xBlinker;
C2=xBlinker;
C3=xBlinker;
xBlinker=1;
} else if (xBlinker==1) {
printf("LED OFF");
C1=xBlinker;
C2=xBlinker;
C3=xBlinker;
xBlinker=0;
}
}



// printf("Hello World\n");

C1=1;
C2=1;
C3=1;

//delay_ms(1000);

// C1=0;
//C2=0;
// C3=0;

}

[SherpaDoug]

Show us your full header including the #use RS232 line.

Your problem is likely either a wrong baud rate, which could be due to a wrong declairation or a bad clock, or wrong voltage levels like inversion or using TTL where you should use RS232 levels or vise versa. The best tool to troubleshoot these things is an oscilloscope.
_________________
The search for better is endless. Instead simply find very good and get the job done.

[Zulander]

This is the Header file..

#include <16F690.h>
#device adc=8

#FUSES NOWDT //No Watch Dog Timer
#use delay(clock=20000000)

#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)

[Ttelmah]

What is your oscillator (crystal, or external module). You need a fuse setting for this. The default fuses for this will be for RC oscillator.

Best Wishes

[Douglas Kennedy]

First I'd forget your code and try the simplest possible code
main
{
while(true)
{
printf("x");
}
}
You've been advised to double check the baud rate etc to make sure the PC is no different.
If that doesn't work check the wiring from the xmt pin on the pic to the MAX232 and out to the RX pin on the PC.
Thousands can make this work so assume it is you're code and or your wiring and trple check if necessary.

[PCM programmer]

[Zulander]

Hi,
I have managed to solve the problem, the problem was that my Bafo BF-810 USB to Serial (DB9) Adapter does not seem to be working for some reason, I was getting garbage. When I used a direct connection to a serial port it worked fine..

So does anyone know a solution for my problem?? I need to work on my laptop and I need a converter.. USB to serial
Thank you