单片机仿真 ADC0808 PWM实验.rar

/*************** writer:shopping.w ******************/ #include <reg52.h> #define uint unsigned int #define uchar unsigned char sbit 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; }