main.c

来自「P18F4610的信号采集及抗抖动程序．MCC18编译器．」· C语言 代码 · 共 133 行

#include <p18f4610.h>
#include "head.h"

//内存变量定义start


void main (void)
{ 
  /*
  //内存初始化从080H到F7EH
 FSR0L=0x80;
 FSR0H=0x00; 
 for(i=3840;i--;i<=0)
 {  
   POSTINC0=0x00;
 }
 //内存初始化end
  */
  PORTB=0XDF;
  TRISB=1;
  RCONbits.IPEN= 1;//允许中断有优先级HH
  INTCONbits.GIE= 0;//关所有中断HH 
  
  INTCON2bits.TMR0IP = 1;//TMRO为高优先级HH
  INTCONbits.TMR0IE= 1;//T0中断使能HH
  TMR0H=0X63;
  TMR0L=0Xbf;
  T0CON = 0X88;
  INTCONbits.GIE= 1;//开所有中断HH 
  key_scan=1;
  while(1)
  {
  
     DI_sampling();
   
   }
}

#pragma code high_vector=0x008
void high_vector (void)
{
  _asm 
   goto timer0
  _endasm
}
//高优先级中断处理
//timer0中断处理start
#pragma code

#pragma interrupt timer0
void
timer0 (void)
{
   INTCONbits.TMR0IF = 0;
   TMR0H=0X63;
   TMR0L=0Xbf;//重装10ms
  
   if(key_scan==1)
    {
     if (PORTBbits.RB5==0)//DI口线
        {key1=key1|0x40;}
     if (PORTBbits.RB5==1)//DI口线
        {key1=0x00;}
    }
}
//timer0中断处理end
/*
void DI_sampling(void)
{
  
  
  switch(delay)
   {  
       
       case   delay2:
                  if(key1==key_temp)
                  {
                    key=key_temp;
                  }
                  else
                  {
                    key_temp=0x00;
                    delay=0x00;
                  }
                  break;
      case   delay1:
                  if(key1==key_temp)
                  {
                    delay=0x04;
                  }
                  else
                  {
                    key_temp=0x00;
                    delay=0x00;
                  }
                  break;

      case   delayflag:
                  if(key1==key_temp)
                  {
                    delay=0x03;
                    }
                  else
                  {
                    key_temp=0x00;
                    delay=0x00;
                  }
                  break;
      case   havekey:
                  key1=0x00;
                  key_scan=1;
                  delay=0x02;
                  break;
                  
   }
     if(delay==0)
     {
       if(key1==0x00)
       {
        delay=0x00;
       }
       else
       {
         key_temp=key1;
         key1=0x00;
         key_scan=0;
         delay=0x01;
       }          
     }
}

*/