Xin code mẫu ngắt uart

[thienminh_npn]

Có anh chị nào cho em xin một đoạn code ngắt uart với. Tình hình là thử hoài vẫn chưa thành công ạ. Em cảm ơn nhiều.

 

[tungbk]

/****************************************************************
 *
 * PIC Training Course 4
 * 
 ****************************************************************/

/****************************************************************
 *
 *	Module	: main_uart_int.c
 *	Description	: test uart interrupt
 *     Tool		: HI-TECH PIC
 *	Chip		: 16F887
 * 	History	: 21/11/2011
 *				
 *	Author	: Dang Anh Tung, CLB PIF			
 *	Description	: PORTD<==>LCD16x2 ; UART<==>PC
 *				
 *
 ****************************************************************/
 

 /****************************************************************
 * 							IMPORT
 ****************************************************************/
  #include <htc.h>
  #include "uart.h"
  
 
 __CONFIG(XT & WDTDIS & PWRTEN & MCLREN & UNPROTECT & DUNPROTECT & BORDIS & IESODIS & FCMDIS & LVPDIS);    //1st config. word
 __CONFIG(BORV21);    //2st config. word
#define _XTAL_FREQ 4000000

/*****************************************************************
* 							DEFINE
******************************************************************/



/*****************************************************************
* 						GLOBAL VARIABLES
******************************************************************/


/*****************************************************************
* 						SUBROUTINES
******************************************************************/

void system_init();

/*****************************************************************
* 						INTERRUPT
******************************************************************/
void interrupt isr()
{
	char temp;
	if(RCIE &&RCIF)
	{
		//RXIF is cleared by hardware
		//get the character
		temp = RCREG;
		//wait until transmitter buffer is available
		while(!TXIF);
                //echo the character
		TXREG = temp;
	}
}


/*****************************************************************
* 						MAIN
******************************************************************/
 
void main(void)
{ 
	system_init();
	while(1)
	{	
	}
}



/*****************************************************************
** Function name:		SystemInit
**
** Descriptions:		
**						
** parameters:			None
** Returned value:		None
** 
*******************************************************************/
void system_init()
{
	//digital pins
	ANSEL = 0;
	ANSELH = 0;
	//init uart peripheral	
	uart_init();
	uart_puts("hello");
	//uart interrupt enable
	RCIE = 1;
	PEIE = 1;
	GIE = 1;
}



/****************************************************************
 * END OF standard form.c
 ****************************************************************/

Ủa anh thấy code bình thường mà (đã thử lại trên mạch), hay là có nhầm gì chăng? E thử lại code này xem.