PWM.rar_PWM 台灯_台灯_按键 PWM调光_按键调光_按键调光代码

#include<reg52.h> #define uint unsigned int; #define uchar unsigned char; uint scale,n; sbit K1=P2^5;//亮度加 sbit K2=P2^4;//亮度减 sbit led=P2^6; sbit BEEP=P1^3; //sbit beep=P1^3; uchar pwm=10,t; void beep();//蜂鸣器函数 //void delayms(unsigned char ms);//延时毫秒 void delay(t);//延时 void main(void) { TMOD=0x02; TH0=0; TL0=0; TR0=1; ET0=1; EA=1; while(1) { if(K1==0) { // delayms(100); delay(100); if(K1==0) { while(K1==0); if(scale==40) beep(); else scale=scale+10; } } if(K2==0) { // delayms(100); delay(100); if(K2==0) { while(K2==0); if(scale==0) beep(); else scale=scale-10; } } } } void timer1(void) interrupt 1 { n++; if(n==40) { n=0; led=0; } if(scale==n) { led=1; } } void beep()//蜂鸣器 { unsigned char i; for(i=0;i<100;i++) { delay(200); BEEP=!BEEP; } BEEP=1; //delayms(200); delay(100); } void delay(t)//延时 { while(t--); } /*void delayms(unsigned char ms)//延时 { unsigned char i; while(ms--); { for(i=0;i<120;i++); } }*/