【51单片机】【protues仿真】基于51单片机简易电子琴系统（8键） - 实践

目录

一、主要效果

二、使用步骤

三、硬件资源

四、软件设计

五、实验现象

一、主要功能

1、八个音符电子琴
2、八个按键对应不同音符​

二、使用步骤

本项目运用Proteus8仿真采用51或52单片机作为控制核心‌，通过蜂鸣器或扬声器（需驱动电路）输出音频信号，8个独立按键分别对应8个不同音调（如中音DO~高音DO），借助定时器中断控制蜂鸣器输出方波频率实现发音‌。

三、硬件资源

1、51单片机核心模块
2、按键模块
2、蜂鸣器模块

四、软件设计

#include<reg52.h> //头文件

#define uint unsigned int //宏定义
#define uchar unsigned char //宏定义

sbit speaker=P1^4;//喇叭接口

uchar a,b; //定义ab变量
void main()
{
TMOD=0x01; //定时器0工作方式
TH0=a;
TL0=b; //赋初值
ET0=1;//打开定时器，然而未允许中断
TR0=1;//打开定时器0
while(1) //主循环
{
check_key(); //扫描按键函数
}
}

/*--------------------------------------------------------------------------

Header file for generic 80C52 and 80C32 microcontroller.
Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.
All rights reserved.
--------------------------------------------------------------------------*/

#ifndef __REG52_H__
#define __REG52_H__
sfr P0 = 0x80;
sfr P1 = 0x90;
sfr P2 = 0xA0;
sfr P3 = 0xB0;
sfr PSW = 0xD0;
sfr ACC = 0xE0;
sfr B = 0xF0;
sfr SP = 0x81;
sfr DPL = 0x82;
sfr DPH = 0x83;
sfr PCON = 0x87;
sfr TCON = 0x88;
sfr TMOD = 0x89;
sfr TL0 = 0x8A;
sfr TL1 = 0x8B;
sfr TH0 = 0x8C;
sfr TH1 = 0x8D;
sfr IE = 0xA8;
sfr IP = 0xB8;
sfr SCON = 0x98;
sfr SBUF = 0x99;
sfr T2CON = 0xC8;
sfr RCAP2L = 0xCA;
sfr RCAP2H = 0xCB;
sfr TL2 = 0xCC;
sfr TH2 = 0xCD;
/* PSW */
sbit CY = PSW^7;
sbit AC = PSW^6;
sbit F0 = PSW^5;
sbit RS1 = PSW^4;
sbit RS0 = PSW^3;
sbit OV = PSW^2;
sbit P = PSW^0; //8052 only

sbit TF1 = TCON^7;
sbit TR1 = TCON^6;
sbit TF0 = TCON^5;
sbit TR0 = TCON^4;
sbit IE1 = TCON^3;
sbit IT1 = TCON^2;
sbit IE0 = TCON^1;
sbit IT0 = TCON^0;
sbit EA = IE^7;
sbit ET2 = IE^5; //8052 only
sbit ES = IE^4;
sbit ET1 = IE^3;
sbit EX1 = IE^2;
sbit ET0 = IE^1;
sbit EX0 = IE^0;
sbit PT2 = IP^5;
sbit PS = IP^4;
sbit PT1 = IP^3;
sbit PX1 = IP^2;
sbit PT0 = IP^1;
sbit PX0 = IP^0;
sbit RD = P3^7;
sbit WR = P3^6;
sbit T1 = P3^5;
sbit T0 = P3^4;
sbit INT1 = P3^3;
sbit INT0 = P3^2;
sbit TXD = P3^1;
sbit RXD = P3^0;
sbit SM0 = SCON^7;
sbit SM1 = SCON^6;
sbit SM2 = SCON^5;
sbit REN = SCON^4;
sbit TB8 = SCON^3;
sbit RB8 = SCON^2;
sbit TI = SCON^1;
sbit RI = SCON^0;
sbit T2EX = P1^1; // 8052 only
sbit T2 = P1^0; // 8052 onl
sbit TF2 = T2CON^7;
sbit EXF2 = T2CON^6;
sbit RCLK = T2CON^5;
sbit TCLK = T2CON^4;
sbit EXEN2 = T2CON^3;
sbit TR2 = T2CON^2;
sbit C_T2 = T2CON^1;
sbit CP_RL2 = T2CON^0;

#endif

五、实验现象

演示视频：

https://www.bilibili.com/video/BV1hYYyz5Egb/https://www.bilibili.com/video/BV1hYYyz5Egb/