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STC89C52单片机 使用定时器使LED灯闪烁
阅读量:541 次
发布时间:2019-03-07

本文共 503 字,大约阅读时间需要 1 分钟。

#include 
#include
#define uint unsigned int#define uchar unsigned charsbit LED1 = P1^0;//LED1//定时器1初始化void timer1Init(){ TR1 = 1; //启动定时器1 TMOD |= 0X10; //定时器1工作模式1,16位定时模式 TH1 = 0x4b; TL1 = 0xfd; //定时50ms}void main()//main函数自身会循环{ uchar mSec;//毫秒储存变量 timer1Init();//定时器1初始化 while(1) { if(TF1 == 1)//判断是否溢出 { TF1 = 0;//软件清零溢出标志位 TH1 = 0x4b; TL1 = 0xfd; //定时50ms mSec++;//50ms到 if(mSec == 10) //定时50毫秒到 { mSec = 0; LED1 = ~LED1;//产生方波 } } } }

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