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標題: 九齊單片機定時器掃描按鍵程序 [打印本頁]

作者: 1481509156 時間: 2024-6-14 16:39
標題: 九齊單片機定時器掃描按鍵程序
/********************獲取按鍵函數**********************/
unsigned char Get_keynum(void)
{
unsigned char temp;
temp=key_num;
key_num=0;
return temp;
}

unsigned char key_Getnum(void)
{
unsigned keynum=0;

if(K1==0){keynum=1;}

return keynum;
}
void key_scan(void)
{
static unsigned lastkey,nowkey;
lastkey=nowkey;
nowkey=key_Getnum();
if(lastkey==1 && nowkey==0)
{
      key_num=1;
}
}/****************************配置定時器0********************************/
void Timer0_Init(void)
{

PCON1 = C_TMR0_Dis;
//1ms
//TMRH = 0X30;
TMR0 = 5;       //計算頻率16M/2/2=4M=4000000HZ=4us 4us*(255-5)=1000us
T0MD = C_PS0_TMR0 | C_PS0_Div2;
INTE = C_INT_TMR0;
PCON1 = C_TMR0_En;
}

#endif
/***************************中斷************************************/

void isr(void) __interrupt(0)
{
if(INTFbits.PBIF)
{
      INTFbits.PBIF = 0;                   // Clear PBIF(PortB input change interrupt flag bit)
      INTF= (unsigned char)~(C_INT_PBKey);// Clear PBIF(PortB input change interrupt flag bit)
}

if(INTFbits.T0IF)
{
      tim++;
         if(tim>=25)
         {
            key_scan();
            tim=0;
         }



INTF= (unsigned char)~(C_INT_TMR0); // Clear T0IF flag bit
}
}
/***************************主函數************************************/
void main(void)
{
GPIO_INIT();
DISI();

Timer0_Init();
//Timer1_Init();
ENI();

//KEY1_INIT();
while(1)
{
      CLRWDT();

      key=Get_keynum();
      if(key==1)
      {
         num++;
         if(num>=10)
         {
            num=0;
         }
      }
      if(num=1){}
      if(num=2){}
      ...

}
}
}

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