为什么不能引起中断，求高手指教

只看该作者 · 2012-12-22 15:47

本帖最后由 2287779862 于 2012-12-22 15:51 编辑

// 中断代码
#pragma code ToIntFunc = 0x008
void ToIntFunc( void )
{
      _asm
      goto IntFunc
      _endasm
}
#pragma code
#pragma interrupt IntFunc
void IntFunc( void )
{
      if ( INTCONbits.GIE == 1 )
      {
            if ( INTCONbits.TMR0IE == 1 )
            {
                     if ( INTCONbits.TMR0IF == 1 )
                     {
                              INTCONbits.TMR0IF = 0;
                              sec++;
                              if ( sec > 60 )
                              {
                                    sec = 0;
                                    min++;
                           }
                           if ( min > 60 )
                           {
                                       hour++;
                                       min = 0;
                           }
                           if ( hour > 24 )
                           {
                                       hour = 0;
                           }
                     }
            }
            if ( PIE1bits.TMR2IE == 1 )
            {
                     if ( PIR1bits.TMR2IF == 1 )
                     {
                              PIR1bits.TMR2IF = 0;
                              sec++;
                              if ( sec > 60 )
                              {
                                    sec = 0;
                                    min++;
                              }
                              if ( min > 60 )
                           {
                                    hour++;
                                    min = 0;
                           }
                           if ( hour > 24 )
                           {
                              hour = 0;
                           }
                     }
            }
      }
}
// 测试代码
void InitTmr2( void )
{
PIR1bits.TMR2IF = 0;
PIE1bits.TMR2IE = 1;
OpenTimer2( T2_POST_1_9&T2_PS_1_4&0b01111011 );
}
void main(void)
{
unsigned char key, _key;
hour = min = sec = 0;
init( ); // 初始化其他引脚
init_lcd( ); // lcd初始化
InitTmr2( ); // TMR2中断引脚初始化
T2CONbits.TMR2ON = 1; // 开启计时器TMR2
Delay1KTCYx( 10 );
send_lcd( 0, 1 ); // lcd清屏
Delay1KTCYx( 4 );
WriteTimer0( 0 ); //
_key = 0;
while ( 1 )
{
      key = scan_key( ); // 按键搜索，没有按键反应返回0，取值返回[0,6]
      //display(129,"00:00:00");
      ShowInfo( );/*
      if ( PIR1bits.TMR2IF )
      {
         PIR1bits.TMR2IF = 0;
         sec++;
         if ( sec > 60 )
         {
            sec = 0;
            min++;
         }
         if ( min > 60 )
         {
            hour++;
            min = 0;
         }
         if ( hour > 24 )
         {
            hour = 0;
         }
      }*/
      if ( key == _key )
         continue;
      if ( key == 2 )
      {
         hour = 0;
         min = 0;
         sec = 0;
      }
      else if ( key == 3 )
      {
         hour = 0;
      }
      else if ( key == 4 )
      {
         min = 0;
      }
      else if ( key == 5 )
      {
         sec = 0;
      }
      else if ( key == 6 )
      {
         T0CONbits.TMR0ON = ~T0CONbits.TMR0ON;
         //if ( T0CONbits.TMR0ON )
         //{
         // WriteTimer0( 0 );
         //}
      }
      _key = key;
}

}

// 代码很简单，时：分：秒，显示这个玩意