频率计-外部频率测试LCD1602显示实验例程C51单片机KEIL工程源码文件.zip
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频率计-外部频率测试LCD1602显示实验例程C51单片机KEIL工程源码文件: /*----------------------------------------------- 名称:频率计 内容:T0外部计数,T1计时1S,计算1S内外部脉冲个数,并在液晶显示 频率:单位时间内完成振动的次数 ------------------------------------------------*/ #include<reg52.h> //包含头文件,一般情况不需要改动,头文件包含特殊功能寄存器的定义 #include<stdio.h> #include"1602.h" #include"delay.h" #define HIGH (65536-10000)/256 #define LOW (65536-10000)%256 sbit LED=P1^2; //定义LED端口 bit OVERFLOWFLAG; bit TIMERFLAG; /*------------------------------------------------ 定时器0初始化子程序 本程序用于计数 ------------------------------------------------*/ void Init_Timer0(void) { TMOD |= 0x01 | 0x04; //使用模式1,16位计数器,使用"|"符号可以在使用多个定时器时不受影响 TH0=0x00; //给定初值 TL0=0x00; EA=1; //总中断打开 ET0=1; //定时器中断打开 TR0=1; //定时器开关打开 } /*------------------------------------------------ 定时器1初始化子程序 本程序用于定时 ------------------------------------------------*/ void Init_Timer1(void) { TMOD |= 0x10; //使用模式1,16位定时器,使用"|"符号可以在使用多个定时器时不受影响 TH1=HIGH; //给定初值,这里使用定时器最大值从0开始计数一直到65535溢出 TL1=LOW; EA=1; //总中断打开 ET1=1; //定时器中断打开 TR1=1; //定时器开关打开 } /*------------------------------------------------ 主程序 ------------------------------------------------*/ main() { unsigned long int a; char temp[16]; //定义字符显示缓冲数组 Init_Timer0(); //初始化定时器0 Init_Timer1(); //初始化定时器1 LCD_Init(); //初始化液晶屏 DelayMs(10); //延时用于稳定,可以去掉 LCD_Clear(); //清屏 LCD_Write_String(0,0,"www.doflye.net");//写入第一行信息,主循环中不再更改此信息,所以在while之前写入 while(1) { if(OVERFLOWFLAG)//检测溢出标志,如果溢出表明频率过高,显示溢出信息 { OVERFLOWFLAG=0;//标志清零 LCD_Write_String(0,1,"overflow >655KHz"); } if(TIMERFLAG) //定时100ms到,做数据处理 { a=TL0+TH0*256;//读取计数值 a=a*10; //扩大到实际值 sprintf(temp,"FREQ:%08.0f Hz",(float)a); LCD_Write_String(0,1,temp);//显示到液晶第二行 TR0=1; //2个定时器打开 TR1=1; TH0=0; //保
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- m0_750287012024-01-21这个资源对我启发很大,受益匪浅,学到了很多,谢谢分享~
- m0_719430122023-05-21感谢资源主的分享,这个资源对我来说很有用,内容描述详尽,值得借鉴。
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