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what wrong with rs232

 
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ryan.reeve



Joined: 23 Jul 2006
Posts: 20

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what wrong with rs232
PostPosted: Sat Oct 14, 2006 1:33 am     Reply with quote
Whats wrong with this code.i cant get any character from the serial port.

Code:
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#define SIZE 80
#define CR 0x0d
#define COMMA 0x2C

#use rs232(baud=9600, xmit=PIN_C6,rcv=PIN_C7, stream=GPS)

void parse();
void rmc();
void gga();
unsigned int j,k;
unsigned char *pChar,LastComaPos;
unsigned char inStr[SIZE] ;
unsigned char c;
int8 index=0;
 

#INT_RDA
void gps_isr(void)
{

 c =fgetc(GPS);
 printf(lcd_putc,"\%c",c); //just for debugging
 if(c=='$')
 {
   
   inStr[index]=c;
   index++;
   if (index==CR) index=0;
 }
}

void main()
{

    lcd_init();

    WHILE(TRUE)
    {
      parse();
    }
}

void parse()
{
   if(inStr[0]!='$')
    printf(lcd_putc,"No Valid Data");
   if(inStr[3]=='R' && inStr[4]=='M' && inStr[5]=='C')
      rmc();
    else if(inStr[3]=='G' && inStr[4]=='G' && inStr[5]=='A')
          gga();

}


PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Oct 14, 2006 2:02 am     Reply with quote
At a minimum, you need to enable INT_RDA interrupts and also
GLOBAL interrupts.

Use the program in this post as a guide:
http://www.ccsinfo.com/forum/viewtopic.php?t=27156&start=1
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