lesson6_2.c

AD TO DA 转换程序

#include<reg52.h>
#define uchar unsigned char
sbit rd=P3^7;
sbit wr=P3^6;
sbit dula=P2^6;
sbit wela=P2^7;
uchar dig;
void delay(uchar);
void main()
{
		P1=0xff;
	while(1)
	{
		P0=0x7f;
		wr=0;
       delay(100);
		wr=1;
		delay(5);

		rd=0;
		delay(100);
		rd=1;
delay(100);	
				
	}
}

void delay(uchar x)
{
	uchar a;
	unsigned int b;
	for(a=x;a>0;a--)
		for(b=100;b>0;b--);
}