lesson5_2.c

51单片机学习C源代码包含多个例子程序由实际经验丰富老师编写

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit d1=P1^0;
sbit dula=P2^6;
sbit wela=P2^7;
sbit key1=P3^4;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar num;

void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}
void main()
{
	wela=1;
	P0=0xfe;
	wela=0;

	P3=0xff;
	while(1)
		{
			if(key1==0)
				{
					delay(5);
					if(key1==0)
					{
						d1=0;
						num++;
						if(num==10)
							num=0;
					}
					while(!key1);
					delay(5);
					while(!key1);
				}
			else
				d1=1;

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