keyread.c

51单片机,健盘驱动,包括C文件和H文件,只接加到工程中使用,已经调试通过.

#include "Capacitance.h"


void Key_delay(void)
{
register unsigned char bt;
  for (bt=0;bt<200;bt++);
}

sbit Key1=P0^1;
sbit Key2=P0^0;
sbit Key3=P0^2;
sbit Key4=P0^3;


unsigned char Key_read(void)
{
 if(Key1==0)
  {
   Key_delay();
   while(Key1==0);
   return 1;
   }

 if(Key2==0)
  {
   Key_delay();
   while(Key2==0);
   return 2;
   }

 if(Key3==0)
  {
   Key_delay();
   while(Key3==0);
   return 3;
   }

 if(Key4==0)
  {
   Key_delay();
   while(Key4==0);
   return 4;
   }
 }