单片机PWM波（AT89C51、ADC0808）

单片机PWM波（AT89C51、ADC0808）

想要更多项目私wo!!!

一、简介

此电路由AT89C51最小系统和ADC0808组成。

二、运行效果

三、代码

/*想要更多项目私wo!!!*/
#include <reg52.h>
#define uint unsigned int
#define uchar unsigned charsbit CLK = P2^4;
sbit ST  = P2^5;
sbit EOC = P2^6;
sbit OE  = P2^7;
sbit PWM = P3^0;void DelayMS(uint ms)
{
    uchar i;while(ms--){
    for(i=0;i<120;i++);}
}void main()
{
    uchar Val;TMOD = 0x02;TH0 = 0x14;TL0 = 0x00;IE  = 0x82;TR0 = 1;while(1){
    ST = 0;ST = 1;ST = 0;while(!EOC);OE  = 1;Val = P1;OE  = 0;if(Val == 0){
    PWM = 0;DelayMS(0xff);continue;}if(Val == 0xff){
    PWM = 1;DelayMS(0xff);continue;}PWM = 1;DelayMS(Val);PWM = 0;DelayMS(0xff - Val);}
}void Timer0_INT() interrupt 1
{
    CLK = !CLK;
}