DA.zip_51单片机DA转换

#include<reg52.h> sbit csda=P3^2; sbit wr=P3^6; sbit du=P2^6; sbit we=P2^7; #define uchar unsigned char #define uint unsigned int uchar aa; void delay(uint z) { uint t1,y; for(t1=z;t1>0;t1--) for(y=110;y>0;y--); } void main() { P0=0xff; aa=0xff; du=0; we=0; while(1) { if(aa!=0) { csda=0; wr=0; P0=aa; aa--; } delay(50); } }