基于51单片机蜂鸣器发声的-C语言程序
51单片机蜂鸣器播放音乐代码
/*生日快乐歌曲*/#include <>#define uint unsigned int#define uchar unsigned charsbit beep = P1^5;uchar code SONG_TONE[]={212,212,190,212,159,169,212,212,190,212,142,159, 212,212,106,126,159,169,190,119,119,126,159,142,159,0};uchar code SONG_LONG[]={9,3,12,12,12,24,9,3,12,12,12,24,9,3,12,12,12,12,12,9,3,12,12,12,24,0};//延时void DelayMS(uint x){uchar t;while(x--) for(t=0;t<120;t++);}void PlayMusic(){uint i=0,j,k;while(SONG_LONG[i]!=0||SONG_TONE[i]!=0){ //播放各个音符，SONG_LONG 为拍子长度for(j=0;j<SONG_LONG[i]*20;j++){beep=~beep;//SONG_TONE 延时表决定了每个音符的频率for(k=0;k<SONG_TONE[i]/3;k++);}DelayMS(10);i++;}}void main(){beep=0;while(1){PlayMusic(); //播放生日快乐DelayMS(500); //播放完后暂停一段时间}}两只蝴蝶：#include <> // 这是单片机音乐代码生成器生成的代码#define uchar unsigned charsbit beepIO=P1^5; // 输出为可以修改成其它 IO 口uchar m,n;uchar code T[49][2]={{0,0},{0xF8,0x8B},{0xF8,0xF2},{0xF9,0x5B},{0xF9,0xB7},{0xFA,0x14},{0xFA,0x66},{0xFA,0 xB9},{0xFB,0x03},{0xFB,0x4A},{0xFB,0x8F},{0xFB,0xCF},{0xFC,0x0B},{0xFC,0x43},{0xFC,0x78},{0xFC,0xAB},{0xFC,0xDB},{0xFD,0x08},{0xFD,0x33},{0xFD,0 x5B},{0xFD,0x81},{0xFD,0xA5},{0xFD,0xC7},{0xFD,0xE7},{0xFE,0x05},{0xFE,0x21},{0xFE,0x3C},{0xFE,0x55},{0xFE,0x6D},{0xFE,0x84},{0xFE,0x99},{0xFE,0 xAD},{0xFE,0xC0},{0xFE,0x02},{0xFE,0xE3},{0xFE,0xF3},{0xFF,0x02},{0xFF,0x10},{0xFF,0x1D},{0xFF,0x2A},{0xFF,0x36},{0xFF,0x42},{0xFF,0x4C},{0xFF,0 x56},{0xFF,0x60},{0xFF,0x69},{0xFF,0x71},{0xFF,0x79},{0xFF,0x81}};uchar code music[][2]={{0,4},{23,4},{21,4},{23,16},{23,4},{21,4},{23,4},{21,4},{19,16},{16,4},{19,4},{21,8}, {21,4},{23,4},{21,4},{19,4},{16,4},{19,4},{14,24},{23,4},{21,4},{23,16},{23,4},{21,4},{23,4},{21,4},{19,24},{16,4},{19,4},{21,8}, {21,4},{23,4},{21,4},{19,4},{16,4},{19,4},{21,24},{23,4},{21,4},{23,16},{23,4},{21,4},{23,4},{21,4},{19,16},{16,4},{19,4},{21,8}, {21,4},{23,4},{21,4},{19,4},{16,4},{19,4},{14,24},{23,4},{26,4},{26,16},{26,4},{28,4},{26,4},{23,24},{21,4},{23,4},{21,8},{21,4}, {23,4},{21,4},{19,4},{16,4},{16,2},{19,2},{19,24},{0,20},{26,4},{26,4},{28,4},{31,4},{30,4},{30,4},{28,4},{23,4},{21,4},{21,4},{23,16},{ 0,4},{23,4},{23,4},{26,4},{28,8},{28,12},{16,4},{23,4},{21,4},{21,24},{23,4},{26,4},{26,4},{23,4},{26,8},{0,4},{31,8},{30,4},{28,4},{30,4},{2 3,8},{0,4},{28,4},{28,4},{30,4},{28,4},{26,4},{23,4},{21,8},{23,4},{21,4},{23,4 },{26,16},{0xFF,0xFF}};void delay(uchar p){uchar i,j;for(;p>0;p--)for(i=181;i>0;i--)for(j=181;j>0;j--);}void pause(){uchar i,j;for(i=150;i>0;i--)for(j=150;j>0;j--);}void T0_int() interrupt 1{beepIO=!beepIO;TH0=T[m][0]; TL0=T[m][1];}void main()uchar i=0;TMOD=0x01; EA=1; ET0=1;while(1){m=music[i][0];n=music[i][1];if(m==0x00){TR0=0;delay(n);i++;}else if(m==0xFF){TR0=0;delay(30);i=0;}else if(m==music[i+1][0]){TR0=1;delay(n);TR0=0;pause();i++;}else{TR0=1;delay(n);i++;}}}祝你平安：#include ""unsigned char Count;sbit _Speak =P1^5 ;unsigned char code SONG[] ={ //祝你平安0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80,0x26,0x20,0x30,0x20 ,0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,0x26,0x20,0x20,0x20,0x20,0x20,0x1c,0x20 ,0x20,0x80,0x2b,0x20,0x26,0x20,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x80,0x26,0x20 ,0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x60,0x40,0x10,0x39,0x10,0x26,0x20 ,0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x80,0x26,0x20,0x2b,0x10,0x2b,0x10 ,0x2b,0x20,0x30,0x10,0x39,0x10,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x20 ,0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x18,0x20,0x18,0x20,0x26,0x20 ,0x20,0x20,0x20,0x40,0x26,0x20,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20 ,0x20,0x80,0x1c,0x20,0x1c,0x20,0x1c,0x20,0x30,0x20,0x30,0x60,0x39,0x10,0x30,0x10 ,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x10,0x26,0x10,0x26,0x10,0x2b,0x10,0x2b,0x80 ,0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x60,0x26,0x10,0x2b,0x20,0x30,0x20 ,0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80,0x26,0x20,0x30,0x10,0x30,0x10,0x30,0x200x39,0x20,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x10,0x40,0x10,0x20,0x10 ,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x00};void Time0_Init(){TMOD = 0x01;IE = 0x82;TH0 = 0xD8;TL0 = 0xEF; //12MZ晶振，10ms}void Time0_Int() interrupt 1{TH0 = 0xD8;TL0 = 0xEF;Count++; //长度加1}/*-------------------------------------------------功能:1MS延时子程序-------------------------------------------------*/void Delay_xMs(unsigned int x){unsigned int i,j;for( i =0;i < x;i++ ){for( j =0;j<3;j++ );}}void Play_Song(unsigned char i){unsigned char Temp1,Temp2;unsigned int Addr;Count = 0; //中断计数器清0Addr = i * 217;while(1){Temp1 = SONG[Addr++];if ( Temp1 == 0xFF ) //休止符{TR0 = 0;Delay_xMs(100);}else if ( Temp1 == 0x00 ) //歌曲结束符{return;}else{Temp2 = SONG[Addr++];TR0 = 1;while(1){_Speak = ~_Speak;Delay_xMs(Temp1);if ( Temp2 == Count ){Count = 0;break;}}}}}/*-------------------------------------------------功能:主程序-------------------------------------------------*/ void main(){Time0_Init(); //定时器0中断初始化while(1){Play_Song(0); //播放}}。
51单片机振动报警器电路设计代码
51单片机振动报警器电路设计代码51单片机振动报警器电路设计代码引言：在安防领域，振动报警器被广泛应用于门窗、保险柜等物品的防盗保护。
本文将介绍如何设计一个基于51单片机的振动报警器电路，并给出相应的代码实现。
一、电路设计1. 元件准备：- 51单片机：选择适合的型号，如STC89C52或AT89S52。
- 振动传感器：常用的有震动开关模块或震动传感器模块。
- 蜂鸣器：选用合适的蜂鸣器模块。
- 电源：使用5V直流电源供电。
2. 电路连接：a) 将振动传感器的VCC引脚连接到单片机的VCC引脚，GND引脚连接到单片机的GND引脚。
b) 将振动传感器的OUT引脚连接到单片机的任意IO口（如P1.0）。
c) 将蜂鸣器模块的正极连接到单片机的另一个IO口（如P1.1），负极接地。
3. 电路原理：振动传感器通过检测外部环境中物体震动的变化来触发报警。
当物体受到震动时，传感器会输出一个高电平信号，单片机通过读取该IO口的状态来判断是否触发报警。
当触发报警时，单片机控制蜂鸣器发出声音。
二、代码实现以下是一个基于C语言的51单片机振动报警器的简单代码实现：```c#include <reg51.h>sbit vibrationSensor = P1^0; // 振动传感器连接到P1.0sbit buzzer = P1^1; // 蜂鸣器连接到P1.1void delay(unsigned int count) {unsigned int i, j;for(i = 0; i < count; i++)for(j = 0; j < 1000; j++);}void main() {vibrationSensor = 1; // 将振动传感器引脚设置为输入模式 buzzer = 0; // 将蜂鸣器引脚设置为输出模式while(1) {if(vibrationSensor == 1) { // 如果检测到振动信号buzzer = 1; // 打开蜂鸣器delay(100); // 延迟一段时间（可根据需要调整） buzzer = 0; // 关闭蜂鸣器}}}```三、代码解析1. 引入头文件：`#include <reg51.h>`，用于引用51单片机的寄存器定义。
基于51单片机的蜂鸣器实验
第5讲
蜂鸣器的使用
蜂鸣器的发声
• 本讲任务： •如何驱动蜂鸣器发声 •简单蜂鸣器发声实验 •给上节课的流水灯加入报警效果 •蜂鸣器演奏音器：有绿色电路板的一
种是无源蜂鸣器，没有电路板而用黑胶封 闭的一种是有源蜂鸣器。
蜂鸣器
蜂鸣器是一种一体化结构的电子讯响器，采用直流电压供电，
蜂鸣器驱动电路
由于蜂鸣器的工作电流一般比较大，
以致于单片机的I/O 口是无法直接 驱动的，所以要利用放大电路来驱 动，一般使用三极管来放大电流就 可以了
了解一下实验板蜂鸣器电路
蜂鸣器软件设计方法
• 软件设计方法 • IO口电平取反方法：I/O 口的电平进行翻转一 次，直到蜂鸣器不需要鸣叫的时候，将I/O 口 的电平设置为高电平即可。
广泛应用于计算机、打印机、复印机、报警器、电子玩具、 汽车电子设备、电话机、定时器等电子产品中作发声器件。 蜂鸣器主要分为压电式蜂鸣器和电磁式蜂鸣器两种类型。蜂 鸣器在电路中用字母“H”或“HA”（旧标准用“FM”、“LB”、 “JD”等）表示。 有源蜂鸣器和无源蜂鸣器：判断有源蜂鸣器和无源蜂鸣器， 还可以用万用表电阻档Rxl档测试:用黑表笔接蜂鸣器"+"引脚， 红表笔在另一引脚上来回碰触，如果触发出咔、咔声的且电 阻只有8Ω(或16Ω)的是无源蜂 蜂鸣器,如果能发出持续声音 的，且电阻在几百欧以上的，是有源蜂鸣器。
有源蜂鸣器和无源蜂鸣器
这里的“源”不是指电源。而是指震荡源。 也就是 说有源蜂鸣器内部带震荡源，所以只要一通电就会 叫。 而无源内部不带震荡源，所以如果用直流信号无法 令其鸣叫。必须用2K~5K的方波去驱动它。 有源蜂鸣器往往比无源的贵，就是因为里面多个震 荡电路。 无源蜂鸣器的优点是：1。便宜，2。声音频率可控， 可以做出“多来米发索拉西”的效果。3。在一些 特例中，可以和LED复用一个控制口 有源蜂鸣器的 优点是：程序控制方便 。
51单片机四路抢答器(LED灯,数码管显示,蜂鸣器提示音)C语言源程序
51单片机四路抢答器（LED灯，数码管显示，蜂鸣器提示音）C语言源程序2009-10-31 10:53其实就是在原有的基础上，加入数码管显示及蜂鸣器，当然根据自己的要求，适当使用单片机I/O口接线为：P0 P2 来控制数码管显示，其中P0为数码管显字控制，P2用来选择位（第几个数码管）P1用来控制8个LED灯P3，独立按键（可以根据需要修改）P3^5（找了一个没有用到的I/O口，当然，可以用键盘扫描的方式来实现，这样的话，可以实现4*4=16路的抢答器，了解原理，做相应修改即可。
#include <reg52.h>sbit key1=P3^0; //这里采用独立按键（4路）sbit key2=P3^1;sbit key3=P3^2;sbit key4=P3^3;sbit SPK=P3^5; //蜂鸣器，最好在ISP编程时先不接入，（我用的是杜邦线，可以设置跳线控制）void delay(unsigned int cnt){while(--cnt);}void speak(unsigned int j){unsigned int i;for(i=0;i<j;i++)//喇叭发声的时间循环，改变大小可以改变发声时间长短{delay(180);//参数决定发声的频率，估算值，自行修改到不刺耳的声调SPK=!SPK;}SPK=1; //喇叭蜂鸣器停止工作，叫一声即可。
}void main(){bit Flag;while(!Flag){if(!key1){P1=0xFE;Flag=1;speak(300);P2=0;P0=0x06;} //LED1，数码管1显示1，蜂鸣器叫else if(!key2){P1=0xFD;Flag=1;speak(300);P2=1;P0=0x5b;}//LED2，数码管2显示2，蜂鸣器叫else if(!key3){P1=0xFB;Flag=1;speak(300);P2=2;P0=0x4f;}//LED3，数码管3显示3，蜂鸣器叫else if(!key4){P1=0xF7;Flag=1;speak(300);P2=3;P0=0x66;}LED4，数码管4显示4，蜂鸣器叫}while(Flag);}测试完，手动复位即可，当然可设置相应的按键来控制标志：Flag,进行继续抢答。
基于c51单片机编写简单蜂鸣器音乐程序的方法
uint i;
for(i=0;i<jp;i++)
{
sound(s);
if(s==0xff)break;
}
}
//*******************************************************************
void main()//主函数
{
while(1)
{
c=0;//用来使数组从头开始读取
/*3*/case 0x0d:j=s/330;break;case 0x0e:j=s/659;break;case 0x0f:j=s/1318;break;
/*4*/case 0x10:j=s/349;break;case 0x11:j=s/370;break;case 0x12:j=s/698;break;case 0x13:j=s/740;break;case 0x14:j=s/1379;break;case 0x15:j=s/1480;break;
0x01,0x0d,0x16,0x1c,0xff,0x1c,0x1c,0x16,0x07,0x07,0x10,0x0d,0xff, 0x01,0x0d,0x16,0x1c,0xff,
0x1c,0x1c,0x22,0x1c,0x16,0x10,0x0d,0x10,0x0d,0x07,0x01,0x00} ;//*
uint code music[]=//这是一个“童话”谱子的数组，与m_t()子程序中的十六进制数一一对应，0xff代表每次音乐的停顿，0x00表示音乐的结束
{0x16,0x10,0x0d,0xff, 0x0d,0x10,0x0d, 0xff, 0x0d,0x10,0x0d,0x10,0x0d,0x07,0x01,0xff,
51单片机蜂鸣器播放音乐代码
/*生日快乐歌曲*/#include <>#define uint unsigned int#define uchar unsigned charsbit beep = P1^5;uchar code SONG_TONE[]={212,212,190,212,159,169,212,212,190,212,142,159, 212,212,106,126,159,169,190,119,119,126,159,142,159,0};uchar code SONG_LONG[]={9,3,12,12,12,24,9,3,12,12,12,24,9,3,12,12,12,12,12,9,3,12,12,12,24,0};//延时!void DelayMS(uint x){uchar t;while(x--) for(t=0;t<120;t++);}void PlayMusic(){uint i=0,j,k;while(SONG_LONG[i]!=0||SONG_TONE[i]!=0){ //播放各个音符，SONG_LONG 为拍子长度%for(j=0;j<SONG_LONG[i]*20;j++){beep=~beep;//SONG_TONE 延时表决定了每个音符的频率for(k=0;k<SONG_TONE[i]/3;k++);}DelayMS(10);i++;}}~void main(){beep=0;while(1){PlayMusic(); //播放生日快乐DelayMS(500); //播放完后暂停一段时间}}两只蝴蝶：%#include <> // 这是单片机音乐代码生成器生成的代码#define uchar unsigned charsbit beepIO=P1^5; // 输出为可以修改成其它IO 口uchar m,n;uchar code T[49][2]={{0,0},{0xF8,0x8B},{0xF8,0xF2},{0xF9,0x5B},{0xF9,0xB7},{0xFA,0x14},{0xFA,0x66},{0xFA,0xB9},{0xFB,0x03 },{0xFB,0x4A},{0xFB,0x8F},{0xFB,0xCF},{0xFC,0x0B},{0xFC,0x43},{0xFC,0x78},{0xFC,0xAB},{0xFC,0xDB},{0xFD,0x08},{0xFD,0x33},{0xFD,0x5B},{0xFD,0x8 1},{0xFD,0xA5},{0xFD,0xC7},{0xFD,0xE7},{0xFE,0x05},{0xFE,0x21},{0xFE,0x3C},{0xFE,0x55},{0xFE,0x6D},{0xFE,0x84},{0xFE,0x99},{0xFE,0xAD},{0xFE,0xC0 },{0xFE,0x02},{0xFE,0xE3},{0xFE,0xF3},{0xFF,0x02},{0xFF,0x10},{0xFF,0x1D},{0xFF,0x2A},{0xFF,0x36},{0xFF,0x42},{0xFF,0x4C},{0xFF,0x56},{0xFF,0x60},{ 0xFF,0x69},{0xFF,0x71},{0xFF,0x79},{0xFF,0x81}};~uchar code music[][2]={{0,4},{23,4},{21,4},{23,16},{23,4},{21,4},{23,4},{21,4},{19,16},{16,4},{19,4},{21,8},{21,4},{23,4},{21,4},{19 ,4},{16,4},{19,4},{14,24},{23,4},{21,4},{23,16},{23,4},{21,4},{23,4},{21,4},{19,24},{16,4},{19,4},{21,8},{21,4},{23,4},{21,4},{19 ,4},{16,4},{19,4},{21,24},{23,4},{21,4},{23,16},{23,4},{21,4},{23,4},{21,4},{19,16},{16,4},{19,4},{21,8},{21,4},{23,4},{21,4},{19 ,4},{16,4},{19,4},{14,24},{23,4},{26,4},{26,16},{26,4},{28,4},{26,4},{23,24},{21,4},{23,4},{21,8},{21,4},{23,4},{21,4},{19,4},{16 ,4},{16,2},{19,2},{19,24},{0,20},{26,4},{26,4},{28,4},{31,4},{30,4},{30,4},{28,4},{23,4},{21,4},{21,4},{23,16},{0,4},{23,4},{23,4},{26,4} ,{28,8},{28,12},{16,4},{23,4},{21,4},{21,24},{23,4},{26,4},{26,4},{23,4},{26,8},{0,4},{31,8},{30,4},{28,4},{30,4},{23,8},{0,4},{28,4},{28,4},{ 30,4},{28,4},{26,4},{23,4},{21,8},{23,4},{21,4},{23,4},{26,16},{0xFF,0xFF}};void delay(uchar p){.uchar i,j;for(;p>0;p--)for(i=181;i>0;i--)for(j=181;j>0;j--);}void pause(){uchar i,j;for(i=150;i>0;i--)for(j=150;j>0;j--);/}void T0_int() interrupt 1{beepIO=!beepIO;TH0=T[m][0]; TL0=T[m][1];}void main(){uchar i=0;TMOD=0x01; EA=1; ET0=1;、while(1){m=music[i][0];n=music[i][1];if(m==0x00){TR0=0;delay(n);i++;}else if(m==0xFF){TR0=0;delay(30);i=0;}else if(m==music[i+1][0]){TR0=1;delay(n);TR0=0;pause();i++;}else.{TR0=1;delay(n);i++;}}}祝你平安：#include ""unsigned char Count;sbit _Speak =P1^5 ;unsigned char code SONG[] ={ //祝你平安0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80,0x26,0x20,0x30,0x20, 0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,0x26,0x20,0x20,0x20,0x20,0x20,0x1c,0x20, %0x20,0x80,0x2b,0x20,0x26,0x20,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x80,0x26,0x20, 0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x60,0x40,0x10,0x39,0x10,0x26,0x20, 0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x80,0x26,0x20,0x2b,0x10,0x2b,0x10, 0x2b,0x20,0x30,0x10,0x39,0x10,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x20, 0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x18,0x20,0x18,0x20,0x26,0x20, 0x20,0x20,0x20,0x40,0x26,0x20,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20, 0x20,0x80,0x1c,0x20,0x1c,0x20,0x1c,0x20,0x30,0x20,0x30,0x60,0x39,0x10,0x30,0x10, 0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x10,0x26,0x10,0x26,0x10,0x2b,0x10,0x2b,0x80, 0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x60,0x26,0x10,0x2b,0x20,0x30,0x20, 0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80,0x26,0x20,0x30,0x10,0x30,0x10,0x30,0x20,￥0x39,0x20,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x10,0x40,0x10,0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x00}; void Time0_Init(){TMOD = 0x01;IE = 0x82;TH0 = 0xD8;TL0 = 0xEF; //12MZ晶振，10ms}void Time0_Int() interrupt 1({TH0 = 0xD8;TL0 = 0xEF;Count++; //长度加1}/*-------------------------------------------------功能:1MS延时子程序-------------------------------------------------*/void Delay_xMs(unsigned int x){）unsigned int i,j;for( i =0;i < x;i++ ){for( j =0;j<3;j++ );}}void Play_Song(unsigned char i){unsigned char Temp1,Temp2;unsigned int Addr;!Count = 0; //中断计数器清0Addr = i * 217;while(1){Temp1 = SONG[Addr++];if ( Temp1 == 0xFF ) //休止符{TR0 = 0;Delay_xMs(100);}:else if ( Temp1 == 0x00 ) //歌曲结束符{return;}else{Temp2 = SONG[Addr++];TR0 = 1;while(1){._Speak = ~_Speak;Delay_xMs(Temp1);if ( Temp2 == Count ){Count = 0;break;}}}}}/*-------------------------------------------------功能:主程序-------------------------------------------------*/ void main(){Time0_Init(); //定时器0中断初始化while(1){Play_Song(0); //播放}}。
51单片机实现蜂鸣器警车、救护车、消防车声
/*-----------------------------------------------
名称：喇叭
论坛：
编写：shifang
日期：2009.5
修改：无
内容：模救护车发声
------------------------------------------------*/
{
while(t--)
{
//大致延时1mS
DelayUs2x(245);
DelayUs2x(245);
}
}/*------------------------------------------------
定时器中断子程序
------------------------------------------------*/
main()
{
unsigned char i;
Init_Timer0(); //初始化定时器
while(1)
{ቤተ መጻሕፍቲ ባይዱ
frq=0;
for(i=0;i<60;i++)//播放1s左右一种频率
{
DelayMs(10);
}
frq=100;
for(i=0;i<60;i++)//播放1s左右另外一种频率
{
DelayMs(10);
//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
}
/*------------------------------------------------
主函数
51单片机C语言编程100例单片机c语言编程
51单片机C语言编程100例单片机c语言编程单片机是一种常用于嵌入式系统的微型计算机，可以根据预设的程序来执行指令。
而C语言是一种高级编程语言，具有较强的可读性和可移植性。
在单片机编程中，C语言是常用的编程语言之一。
本文将介绍51单片机C语言编程中的100个实例，帮助读者了解单片机编程的基本概念和技巧。
1. LED灯闪烁这是一个简单的实例，用于让LED灯交替闪烁。
在C语言中，可以使用宏定义和循环语句来实现：```c#include <reg52.h>#define LED P1void delay(unsigned int t) //延时函数{unsigned int i, j;for (i = t; i > 0; i--)for (j = 110; j > 0; j--);}void main(){while (1) //循环执行{LED = 0xFF; //LED灯亮delay(1000); //延时1秒LED = 0x00; //LED灯灭delay(1000); //延时1秒}}```2. 数码管显示这个实例演示了如何使用数码管进行数字显示。
在C语言中，可以通过控制IO口状态来实现：```c#include <reg52.h>#define LED P0unsigned char code digit[] ={ //数码管显示值表0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90}; void delay(unsigned int t) //延时函数{unsigned int i, j;for (i = t; i > 0; i--)for (j = 110; j > 0; j--);}void main(){unsigned int i;while (1) //循环执行{for(i=0;i<10;i++){LED = digit[i]; //显示数字delay(1000); //延时1秒}}```3. 蜂鸣器发声这个实例展示了如何使用蜂鸣器进行声音发声。
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说明：按下不同的按键会是SOUNDER发出不同频率的声音。
本例使用延时函数实现不同频率的声音输出，以后也可使用定时器
*/
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit BEEP=P3^7;
sbit K1=P1^4;
sbit K2=P1^5;
sbit K3=P1^6;
sbit K4=P1^7;
//延时
void DelayMS(uint x)
{
uchar t;
while(x--) for(t=0;t<120;t++);
}
//按周期t发音
void Play(uchar t)
{
uchar i;
for(i=0;i<100;i++)
{
BEEP=~BEEP;
DelayMS(t);
}
BEEP=0;
}
void main()
{
P1=0xff;
BEEP=0;
while(1)
{
if(K1==0) Play(1);
if(K2==0) Play(2);
if(K3==0) Play(3);
if(K4==0) Play(4);
}
}
说明：程序运行时播放生日快乐歌，未使用定时器中断，所有频率完全用延时实现
*/
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit BEEP=P3^7;
//生日快乐歌的音符频率表，不同频率由不同的延时来决定
uchar code SONG_TONE[]=
{212,212,190,212,159,169,212,212,190,212,142,159,212,212,106,126,159,169,190,1 19,119,126,159,142,159,0};
//生日快乐歌节拍表，节拍决定每个音符的演奏长短
uchar code SONG_LONG[]=
{9,3,12,12,12,24,9,3,12,12,12,24, 9,3,12,12,12,12,12,9,3,12,12,12,24,0};
//延时
void DelayMS(uint x)
{
uchar t;
while(x--) for(t=0;t<120;t++);
}
//播放函数
void PlayMusic()
{ uint i=0,j,k;
while(SONG_LONG[i]!=0||SONG_TONE[i]!=0)
{ //播放各个音符，SONG_LONG为拍子长度
for(j=0;j<SONG_LONG[i]*20;j++)
{
BEEP=~BEEP;
//SONG_TONE延时表决定了每个音符的频率
for(k=0;k<SONG_TONE[i]/3;k++);
}
DelayMS(10);
i++;
}
}
void main()
{
BEEP=0;
while(1)
{
PlayMusic(); //播放生日快乐
DelayMS(500); //播放完后暂停一段时间
}。