lesson 5_2.c

有51单片机C语言基础后在较短时间内学会51单片机C。

#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar num,temp;
sbit dula=P2^6;
sbit wela=P2^7;
sbit key1=P3^2;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void delay(uint z);
void initial();
void qudoudong();
void main()
{
    initial();
	while(1)
	{
		qudoudong();

		dula=1;
		P0=table[num];
		dula=0;
	}
}

void initial()
{
    key1=1;
	num=0;

	temp=0xfe;
	P1=temp;

	wela=1;
	P0=0xfe;
	wela=0;	
}

void qudoudong()
{
		if(key1==0)
		{
		    delay(10);			  //按下去抖动
			if(key1==0)
			{
				while(key1!=1);	  //判断是否松手
		  		delay(10);		  //松手去抖动
				if(key1==1)		  //完全松开手
				{
					num++;
					if(num==10) num=0;

					temp=_crol_(temp,1);
					P1=temp;
				}
			}
		}
}

void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}