各位先進大家好:
個人為初學者目前有一問題無法解決,尚請先進們能幫幫忙,我用兩18f452以rs232互傳資料,不知是否中斷設定有問題,有時正常有時不動作,還請各位能夠給予指點.謝謝!

#include <p18f452.h> //MASTER
#define BaudRate 25
void High_INT_SER(void);
void InitialUSART(void);
void PUTCHAR(char c);
char DATA[3];
char SEND[3]={0x40,0x31,0x2A};
char RI_PTR;
char sw;
//******** INTERRUPT PROGRAM *******
#pragma code High_Interrupt_Vector=0x0008
void High_INT_VEC(void)
{
_asm
goto High_INT_SER
_endasm
}
#pragma code
//**********接收中斷副程式 **************
#pragma interrupt High_INT_SER
void High_INT_SER(void)
{
if(PIR1bits.RCIF==1)
{
DATA[RI_PTR]=RCREG;
RI_PTR++;
if(RI_PTR==2) RI_PTR=0;
}
}
#pragma
//************ MAIN PROGRAM
void main(void)
{
char i;
TRISB=0xff;
TRISD=0x00;
ADCON1=0x06;
InitialUSART();
while(1)
{
if(PORTB!=sw) sw=PORTB;
for(i=0;i<3;i++)
PUTCHAR(SEND[i]);
}
}
//************** InitialUSART *****************
void InitialUSART(void)
{
RCONbits.IPEN=1;
INTCONbits.GIEH=1;
INTCONbits.PEIE=1;
RCSTAbits.SPEN=1;
RCSTAbits.CREN=1;
TXSTAbits.TXEN=1;
TXSTAbits.BRGH=1;
PIE1bits.RCIE=1;
PIR1bits.RCIF=0;
IPR1bits.RCIP=1;
SPBRG=BaudRate;
}
//*********** PUTCHAR 傳遞副程式
void PUTCHAR(char c)
{
TXREG=c;
while(TXSTAbits.TRMT!=1);
}




//***************SLAVE********************
#include <p18f452.h>
#define BaudRate 25
void High_INT_SER(void);
void InitialUSART(void);
void PUTCHAR(char c);
char DATA[3];
char SEND[3]={0x40,0x31,0};
char RI_PTR;
char SEND_FLAG=0;
char sw=0x00,i;
//************* INTERRUPT PROGRAM ****
#pragma code High_Interrupt_Vector=0x0008
void High_INT_VEC(void)
{
_asm
goto High_INT_SER
_endasm
}
#pragma code
//*****************************
#pragma interrupt High_INT_SER
void High_INT_SER(void)
{
if(PIR1bits.RCIF==1)
{
DATA[RI_PTR]=RCREG;
RI_PTR++;
if(RI_PTR==2) RI_PTR=0;
}
}
#pragma
//************ MAIN PROGRAM ******
void main(void)
{

TRISB=0xff;
ADCON1=0x06;
InitialUSART();
while(1)
{
while(PORTB==sw);
sw=PORTB;
SEND[2]=PORTB;
SEND_FLAG=0;
while(SEND_FLAG!=1);
for(i=0;i<3;i++)
PUTCHAR(SEND[i]);
SEND_FLAG=0;
}
}
//************** InitialUSART *****************
void InitialUSART(void)
{
RCONbits.IPEN=1;
INTCONbits.GIEH=1;
RCSTAbits.SPEN=1;
RCSTAbits.CREN=1;
TXSTAbits.TXEN=1;
TXSTAbits.BRGH=1;
PIE1bits.RCIE=1;
PIR1bits.RCIF=0;
IPR1bits.RCIP=1;
SPBRG=BaudRate;
}
//*********** PUTCHAR *********************
void PUTCHAR(char c)
{
if(PIR1bits.TXIF!=0) TXREG=c;
while(TXSTAbits.TRMT!=1);
}