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int_rda calls forever

 
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kbaser



Joined: 26 Jul 2009
Posts: 5

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int_rda calls forever
PostPosted: Sun Mar 21, 2010 9:32 am     Reply with quote
Please help,
I wrote a simple Rx counter code.
I expected to see each RX activity, but unfortunately this call executes every cycle of CPU and counts forver!
What can I do to call this isr when RX comes ?
Code:

#include <16F688.H>
#fuses INTRC_IO, NOWDT, NOPROTECT, PUT,NOMCLR
#use delay(clock = 8000000)

#use rs232 (baud=19200, rcv=pin_c5, xmit=pin_c4, parity=N, stop=1,Errors)

#include "flex_lcd420_688.c"
#include "stdlib.h"

int counter;

#int_rda
void comm_test ()
{
         counter= counter +1;
         lcd_gotoxy(1,1);
         printf(lcd_putc,"int_rda : %d ",counter);
   
}

void main() {
     lcd_init();
     enable_interrupts(int_rda);
     enable_interrupts(GLOBAL);

while(true) {}
}

please help Rolling Eyes
dyeatman



Joined: 06 Sep 2003
Posts: 1934
Location: Norman, OK

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PostPosted: Sun Mar 21, 2010 9:47 am     Reply with quote
You have to read the UART receive register in the INT_RDA routine to clear the interrupt. Example: c=getc()
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