Lỗi ngắt chân RB0

[Knight_FlyCn]

Code của mình như sau:

 
#include <Coordinator.h>
#include "def_18f4620.c"
#include "slave_2_tx_rx.h"

#use delay(clock = 4000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
#define SPI_MODE_0  (SPI_L_TO_H | SPI_XMIT_L_TO_H)

#bit CS     = 0xF80.4
#bit RST    = 0xF82.2
#bit INT_   = 0xF81.0
#bit WAKE   = 0xF82.1


#bit CS_Direction    = 0xF92.4
#bit RST_Direction   = 0xF94.2
#bit INT_Direction   = 0xF93.0
#bit WAKE_Direction  = 0xF94.1


INT temp,command1;
int new_rx;

#INT_EXT
void  EXT_isr(void) 
{ 
      new_rx = true;
} 




void main()
{
   TRISD3=0;
   
   ////////////////
   
   CS_Direction   = 0;     // Set direction to be output
   RST_Direction  = 0;     // Set direction to be output
   INT_Direction  = 1;     // Set direction to be input
   WAKE_Direction = 0;     // Set direction to be output
   
   
   Delay_ms(5);  
   setup_spi(SPI_MASTER | SPI_MODE_0 | SPI_CLK_DIV_4);  // Initialize SPI module
   pin_reset();                              // Activate reset from pin
   software_reset();                         // Activate software reset
   RF_reset();                               // RF reset
   set_WAKE_from_pin();                      // Set wake from pin
   set_long_address(ADDRESS_long_2);
   set_short_address(coord_address_short);       // Set short address
   set_PAN_ID(PAN_ID);                     // Set PAN_ID

   init_ZIGBEE_nonbeacon();                  // Initialize ZigBee module
   nonbeacon_PAN_coordinator_device();
   set_TX_power(31);                         // Set max TX power
   set_frame_format_filter(1);               // 1 all frames, 3 data frame only
   set_reception_mode(1); // 1 normal mode
   delay_ms(10);
   enable_int();
   pin_wake(); // Wake from pin
    
   
   ext_int_edge(H_to_L);
   enable_interrupts(INT_EXT);
   enable_interrupts(GLOBAL);
   
   
   printf(" RESET - THIET BI THU \r\n");
   
   
   while (new_rx)
      {
      new_rx = false;
      temp = read_ZIGBEE_short(INTSTAT); // Read and flush register INTSTAT
      read_RX_FIFO();
      command1=DATA_RX[0];
      printf("|Gia tri:%D \n",command1);
      delay_ms(200);
      }
}

Nhưng ngắt tại chân RB0 lại ko hoạt động. Khi có dữ liệu gửi tới mà ngắt lại ko xảy ra.