khi kích hoạt ngắt TX trong ccs thì những phần code còn lại không chạy được

[tan955]

có ai biết nguyên nhân khi kích hoạt ngắt tbe của pic16f877a thì toàn bộ phần code phía sau ko chạy được?
code:

#include "PIC_PID_LCD.h"

     #define LCD_ENABLE_PIN  PIN_B1                                    ////
     #define LCD_RS_PIN      PIN_B0                                    ////
     #define LCD_RW_PIN      PIN_B6                                    ////
     #define LCD_DATA4       PIN_B2                                    ////
     #define LCD_DATA5       PIN_B3                                   ////
     #define LCD_DATA6       PIN_B4                                    ////
     #define LCD_DATA7       PIN_B5 
#include <LCD.C>
#define MAX_PWM 1023
#define MIN_PWM 0
#define Max_Temp 100
#define Min_Temp 0
#define K_PWM (float) (Max_PWM / Max_temp)
#define K_TEMP (float) (500.0 / 1024.0)

float KP,KI,KD;
float P_term,I_term,D_term;
float set_point,Temp_err,ACC_err;
float real_Temp;
unsigned int1 time_done,Rx_RCV_DONE;
signed int32 PWM_OUT;
char RX_Buffer[10],Rx_index,RX_Status,Tx_index;
 char my_str[20];
#int_RTCC
void  RTCC_isr(void) 
{

}
#int_tbe
void TBE_isr()
{


//if( my_str[Tx_index] != 0)
//putc(my_str[Tx_index++]);
}
#int_RDA
void  RDA_isr(void) 
{
char c ;
c = getch();
if(c == '$') {Rx_index = 0 ; RX_Status = 1;return;}
if(c == 'A') {Rx_index = 0 ; RX_Status = 2;return;}
if(c == 'B') {Rx_index = 0 ; RX_Status = 3;return;}
if(c == 'C') {Rx_index = 0 ; RX_Status = 4;return;}
if(c == 13) {RX_buffer[Rx_index] = 0; RX_RCV_DONE = 1;return;}
if((Rx_status!= 0) && ( Rx_status < 5))
   {
   RX_buffer[Rx_index++] = c;
   }
 
}

#int_TIMER1
void  TIMER1_isr(void) 
{
// 4us
set_timer1(40536);   // 100ms
time_done = 1;
}


#include <stdlib.h>

int16 adc_result,adc_val;
void main()
{
   
   setup_adc_ports(AN0);
   setup_adc(ADC_CLOCK_DIV_2);
   //setup_psp(PSP_DISABLED);
  // setup_spi(SPI_SS_DISABLED);
   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_256);
   setup_timer_1(T1_INTERNAL|T1_DIV_BY_4);
   setup_timer_2(T2_DIV_BY_4,249,1);
   setup_ccp1(CCP_PWM);
   set_pwm1_duty(1023);
   
   setup_comparator(NC_NC_NC_NC);
   setup_vref(FALSE);
   lcd_init();
   //enable_interrupts(INT_RTCC);
  
   //enable_interrupts(INT_TBE);
   enable_interrupts(INT_TIMER1);
    enable_interrupts(int_tbe);
   enable_interrupts(INT_RDA);
   enable_interrupts(GLOBAL);
// LOI O DAY MAY BAC A
// DO DÒNG " enable_interrupts(int_tbe);"
// CÓ ai biết cách sửa ko ?
   //TODO: User Code
  // int16 adc_result,adc_val;
   float tam;
   
   
   set_adc_channel(0);
   KP = 0;
   KI = 0;
   
   KD = 0;
   char adc_count;
  
  printf(lcd_putc,"\fPID System...");
  delay_ms(1000);
  
   adc_val = read_adc();
   set_tris_c(0x0);
   set_tris_b(0x0);
   set_tris_a(0x01);
   rx_status = 0;
   
   while(true)
      {
      adc_result = 0;
       for(adc_count = 0; adc_count < 5; adc_count++)
         {
         adc_result += read_adc();
         delay_us(20);
         } 
       adc_val += adc_result ;
       adc_val /= 6;
       Real_temp = (float) adc_val * 500.0 / 1024.0;  
       
       Temp_err = Set_Point - Real_temp;
       
      if(time_done)
         {
         time_done = 0;
         //P_term = (KP * (float)Temp_err ) * Max_PWM / Max_Temp; // P
         P_term = (KP * Temp_err ) * K_PWM; // P
         ACC_err += Temp_err;
         //I_term = (KI * (float)ACC_err )* Max_PWM / Max_Temp;
         I_term = (KI * ACC_err )* K_PWM; // I
         D_term = (KD *  Temp_err) * K_PWM; // D
         PWM_OUT =(P_term + I_term + D_term);
         if(PWM_OUT > MAX_PWM ) PWM_OUT=MAX_PWM;
         if(PWM_OUT < MIN_PWM ) PWM_OUT=MIN_PWM;
          set_pwm1_duty(PWM_OUT);
         printf(my_str,"%4ldA%.2f\r",PWM_OUT,Real_Temp);
          //enable_interrupts(INT_TBE);
         Tx_index = 0;
         putchar(my_str[0]);
          lcd_gotoxy(1,1);
          printf(lcd_putc,"T: %3.1f",real_temp);
         }
      if(RX_RCV_DONE)
         {
         RX_RCV_DONE = 0;
         tam = atof(RX_Buffer);
         switch (RX_status)
            {
            
            case  1:
               Set_Point = tam;
               lcd_gotoxy(0,1);
               printf(lcd_putc,"SP: %3.2f",tam);
            break;
            case 2:
               KP = Tam;
            break;
            case 3:
               KI = Tam;
            break;
            case 4:
               KD = Tam;
            break;
            default:
            break;
            }
         }
      }
}

cần cao thủ chỉ giáo! thanks!