CCS C INT

ext.c

#include <ext.h>
#define LED_BAO PIN_D0
#define LED_NGAT PIN_D1
#INT_EXT //chi thi khai bao ngat(Chuong trinh se thuc hien ham ngay sau chi thi)
void  ngatngoai0_isr(VOID) //ham thuch hien khi co ngat
{
   fprintf (DEBUG_PORT, "\r\nBat dau thuc hien ham trong ngat");
   output_toggle (LED_NGAT);
   for (INT i = 0; i < 10; i++)
   {
      fprintf (DEBUG_PORT, "\r\ni = %u",i);
      delay_ms (200);
   }

   
   fprintf (DEBUG_PORT, "\r\nKet thuc thuc hien ham trong ngat");
}

#INT_EXT1 //chi thi khai bao ngat(Chuong trinh se thuc hien ham ngay sau chi thi)

void  ngatngoai1_isr(VOID) //ham thuch hien khi co ngat ngoai 1
{
   fprintf (DEBUG_PORT, "\r\nXay ra ngat ngoai 1");
}

int8 so_lan;

void main()
{
   enable_interrupts (INT_EXT); //Cho phep ngat ngoai 0
   enable_interrupts (INT_EXT1); //Cho phep ngat ngoai 1
   enable_interrupts (INT_EXT_H2L); //ngat khi co su thay doi trang thau tu H (muc cao) xuong L (muc thap)
   enable_interrupts (INT_EXT1_H2L); //ngat khi co su thay doi trang thau tu H (muc cao) xuong L (muc thap)
   enable_interrupts (GLOBAL); //Cho phep ngat toan cuc
   fprintf (DEBUG_PORT, "\r\nChay WHILE (true) ");
   so_lan = 0;

   WHILE (TRUE)
   {
      so_lan++;
      if(so_lan>255)
      {
      so_lan=0;
      }
      output_toggle (LED_BAO);
      delay_ms (100);

      IF (so_lan == 100)
      {
         disable_interrupts (INT_EXT); //Khong cho phep ngat ngoai 0
         fprintf (DEBUG_PORT, "\r\nTat cho phep ngat ngoai 0 ");
      }
       IF (so_lan == 200)
      {
         enable_interrupts (INT_EXT); //Khong cho phep ngat ngoai 0
         fprintf (DEBUG_PORT, "\r\nBat cho phep ngat ngoai 0 ");
      }

   }
}

ext.h

#include <18F4520.h>
#FUSES NOWDT                    //No Watch Dog Timer
#FUSES WDT128                   //Watch Dog Timer uses 1:128 Postscale
#FUSES HS                       //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOBROWNOUT               //No brownout reset
#FUSES NOLVP                    //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOXINST                  //Extended set extension and Indexed Addressing mode disabled (Legacy mode)

#use delay(clock=20000000)
#use rs232(UART1,baud=9600,parity=N,bits=8,stream=DEBUG_PORT,errors)//Khai bao su dung uart cung