半个小时省赛三等奖基础

包括数码管显示，按键，板子初始化。

#include <STC15F2K60S2.h>
#define uchar unsigned char
#define uint unsigned int
sbit s7=P3^0;
sbit s6=P3^1;
uchar code tab[]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90,0XBF,0XFF};
//1 2 3 4 5 6 7 8 9 - 灭
uchar code dottab[]={0X40,0X79,0X24,0X30,0X19,0X12,0X02,0X78,0X00,0X10};
//带小数点的数字，程序主要用第二位，第六位 0. 1. 2. 3. 4. 5. 6. 7. 8. 9.
uchar yi,er,san,si,wu,liu,qi,ba;

void Delay1ms(uchar ms);
void display1(uchar yi,uchar er);
void display2(uchar san,uchar si);
void display3(uchar wu,uchar liu);
void display4(uchar qi,uchar ba);
void allinit();
void keyscan();


void main()
{
	allinit();
	yi=1,er=2,san=3,si=4,wu=5,liu=6,qi=7,ba=8;
	while(1)
	{
		
	 display1( yi, er);
	 display2( san, si);
	 display3( wu, liu);
	 display4( qi, ba);
	 keyscan();
	}
}

void Delay1ms(uchar ms)		//@12.000MHz  最多延时255ms
{
	unsigned char i, j;
  uchar k;
	for(k=ms;k>0;k--)
	{
	i = 12;
	j = 169;
	do
	{
		while (--j);
	} while (--i);
	
	}

}


void display1(uchar yi,uchar er)
{
	P2=0XC0;
	P0=0X01;
	P2=0XE0;
	P0=tab[yi];
	Delay1ms(1);
	
	P2=0XC0;
	P0=0X02;
	P2=0XE0;
	P0=tab[er];
	Delay1ms(1);
}

void display2(uchar san,uchar si)
{
	P2=0XC0;
	P0=0X04;
	P2=0XE0;
	P0=tab[san];
	Delay1ms(1);
	
	P2=0XC0;
	P0=0X08;
	P2=0XE0;
	P0=tab[si];
	Delay1ms(1);

}

void display3(uchar wu,uchar liu)
{
	P2=0XC0;
	P0=0X10;
	P2=0XE0;
	P0=tab[wu];
	Delay1ms(1);
	
	P2=0XC0;
	P0=0X20;
	P2=0XE0;
	P0=tab[liu];
	Delay1ms(1);
}

void display4(uchar qi,uchar ba)
{
	P2=0XC0;
	P0=0X40;
	P2=0XE0;
	P0=tab[qi];
	Delay1ms(1);
	
	P2=0XC0;
	P0=0X80;
	P2=0XE0;
	P0=tab[ba];
	Delay1ms(1);
   P2=0XC0;//位选
	P0=0XFF;
	P2=0XE0;//段选
	P0=0XFF;//将所有数码管关闭，使其亮度一致，都点亮1ms

}
void allinit()
{
	P2=0X80;
	P0=0XFF;//关LED
	
	P2=0XC0;
	P0=0XFF;
	P2=0XE0;
	P0=0XFF;//关数码管
	
	P2=0XA0;
	P0=0X00;//关蜂鸣器 继电器	
}

void keyscan()
{
	if(s7==0)
	{
	 Delay1ms(5);//延时消抖
		if(s7==0)
		{
			yi=11,er=11,san=11,si=11,wu=11,liu=11,qi=11,ba=11;//所有数码管灭
		}
		while(!s7);
	}
	else if(s6==0)
	{
	 Delay1ms(5);
		if(s6==0)
		{
			yi=0,er=0,san=0,si=0,wu=0,liu=0,qi=0,ba=0;//所有数码管为0
		}
		while(!s6);
	}
	
}