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Problem between #INT_EXT and #INT_RB

 
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pilar



Joined: 30 Jan 2008
Posts: 197

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Problem between #INT_EXT and #INT_RB
PostPosted: Wed Feb 05, 2014 7:05 pm     Reply with quote
Hi, anyone can help me with this,

I'm trying to use the #INT_EXT and #INT_RB but each with different edge on which the edge interrupt should trigger, #INT_EXT is rise edge (L to H) and #INT_RB is fall edge (H to L), but when two interrupts are enabled #INT_EXT only active with fall edge, but when I disable #INT_RB, #INT_EXT works OK, it is activated by the rising edge ... what is the problem?

Here is my code:
Code:
#include <18F4520.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,NOBROWNOUT
#use delay(clock=20000000)
#use rs232(baud=19200, xmit=PIN_C6, rcv=PIN_C7, timeout=5000)// RS232 Estándar

int Clear_PORTB;

#INT_EXT
void Int_CALL(){

output_toggle(PIN_D0);
}

#INT_RB
void Int_DOOR(){

   output_toggle(PIN_D3);

Clear_PORTB = input_b();

}

void main() {

    ext_int_edge(L_TO_H);
    clear_interrupt(INT_EXT);
    enable_interrupts(int_ext);            
            
    ext_int_edge( H_TO_L );
    clear_interrupt(INT_RB);
    enable_interrupts(int_rb);   
   
    enable_interrupts(global);
      
while(TRUE) {

   delay_ms(100);
   }
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Feb 05, 2014 8:15 pm     Reply with quote
Quote:
ext_int_edge(L_TO_H);
clear_interrupt(INT_EXT);
enable_interrupts(int_ext);

ext_int_edge( H_TO_L );
clear_interrupt(INT_RB);
enable_interrupts(int_rb);

The function in bold is not used for INT_RB. It's only for INT_EXT.
The 18F4520 doesn't have the ability to select the edge for INT_RB.
pilar



Joined: 30 Jan 2008
Posts: 197

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PostPosted: Thu Feb 06, 2014 8:03 am     Reply with quote
Hi PCM programmer,

Thank you... Embarassed the error is so obvious!!!
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