main.c

自己学习PIC单片机时的仿真程序

#include<pic.h>
#define BIT(x) (1<<(x))
#define uint unsigned int
#define uchar unsigned char
uchar table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d, 0x07,
		           0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//数码管译码表
__CONFIG(0x3B31);
void delay(uint ms)        //毫秒延时程序
{
        uint i,j;
	for(i=0;i<ms;i++)
	   {
	   for(j=0;j<88;j++);
       }
}

void show(uchar j,uchar k)//数码管动态位显示，j为显示的数值，k为显示的位
{
	PORTD=table[j];     //PD口做数据口段选
	PORTA=~(1<<(k));    //PA口低位做位选
	delay(1);
	PORTA=0XFF;
}

void init()
{
 TRISA=0;//输出
 PORTA=0XFF;
 TRISD=0;//输出
 PORTD=0;
 TRISB=0X0F;//低四位输入
 PORTB=0;
 TRISE0=0;
 RE0=0;
}
 
void bell(uchar num)//蜂鸣器响
{
 uchar dnum;
 for(dnum=num;dnum>0;dnum--)
 {
  RE0=1;
  delay(50);
  RE0=0;
  delay(20);
 }
}

void dig_tube(uchar num0,uchar num1,uchar num2,uchar num3,uchar num4,uchar num5)
{
 show(num0,0);
 show(num1,1);
 show(num2,2);
 show(num3,3);
 show(num4,4);
 show(num5,5);	
}
void main()
{uchar key_num;
 init();
 while(1)
 {
 if(RB0==0)
   {
    delay(10);
    if(RB0==0)
    {
     while(!RB0);
     key_num=1;
    }
   }
 
  if(RB1==0)
   {
    delay(10);
    if(RB1==0)
    {
     while(!RB1);
     key_num=2;
    }
   }
   
    if(RB2==0)
   {
    delay(10);
    if(RB2==0)
    {
     while(!RB2);
     key_num=3;
    }
   }
   
    if(RB3==0)
   {
    delay(10);
    if(RB3==0)
    {
     while(!RB3);
     key_num=4;
    }
   }	 
 dig_tube(key_num,1,2,3,5,8);
 } 
}