《单片机实践项目》之《电子DIY》基于51单片机的简易电子琴设计与制作

程序

//视频讲解：B站搜索：“逗比小憨憨”
#include "reg52.h"
#define uint unsigned int
#define uchar unsigned char
#define KEYPORT P1
#define SMGPORT P0
#define delayValue 10
sbit buzzer=P2^3;
uint value=0;
uchar code dis[]={
    
    0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uint  code tone[8]={
    
    0xfc44,0xfcac,0xfd09,0xfd34,0xfd82,0xfdc8,0xfe06,0xfe22};
uchar code button_Sel[8]={
    
    0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
void Button_Scan(void);
void Handler(void);
void delay_ms(uint k);
void delay_ms(uint k)
{
    
    
	uint j=0,i=0;
	for(j=0;j<k;j++)
		for(i=0;i<118;i++);
}

void Button_Scan(void)
{
    
    	
	KEYPORT=0xff;
	if(KEYPORT==button_Sel[0]) 
	{
    
    
		delay_ms(delayValue);
		if(KEYPORT==button_Sel[0]) 
		{
    
    
			value=tone[0];
			SMGPORT=dis[1];
		}
	}
	if(KEYPORT==button_Sel[1]) 
	{
    
    
		delay_ms(delayValue);
		if(KEYPORT==button_Sel[1])
		{
    
    
			value=tone[1];
			SMGPORT=dis[2];
		}
	}
 	if(KEYPORT==button_Sel[2]) 
	{
    
    
		delay_ms(delayValue);
		if(KEYPORT==button_Sel[2])
		{
    
    
			value=tone[2];
			SMGPORT=dis[3];
		}
	}
	if(KEYPORT==button_Sel[3]) 
	{
    
    
		delay_ms(delayValue);
		if(KEYPORT==button_Sel[3])
		{
    
    
			value=tone[3];
			SMGPORT=dis[4];
		}
	}
	if(KEYPORT==button_Sel[4])
	{
    
    
		delay_ms(delayValue);
		if(KEYPORT==button_Sel[4])
		{
    
    
			value=tone[4];
			SMGPORT=dis[5];
		}
	}
 	if(KEYPORT==button_Sel[5]) 
	{
    
    
		delay_ms(delayValue);
		if(KEYPORT==button_Sel[5])
		{
    
    
			value=tone[5];
			SMGPORT=dis[6];
		}
	}
	if(KEYPORT==button_Sel[6]) 
	{
    
    
		delay_ms(delayValue);
		if(KEYPORT==button_Sel[6])
		{
    
    
			value=tone[6];
			SMGPORT=dis[7];
		}
	}
	if(KEYPORT ==button_Sel[7]) 
	{
    
    
		delay_ms(delayValue);
		if(KEYPORT==button_Sel[7])
		{
    
    
			value=tone[7];
			SMGPORT=dis[8];
		}
	}
}

void Handler(void)
{
    
    
	if(KEYPORT==0xff)
	{
    
    
		P2=0xff;
		TR1=0;
		buzzer=1;
	}
	else	  
	{
    
    
		TR1=1;
	}
}

void main(void)
{
    
    
	ET1=1;
	TMOD |=0x10;//使用定时器T1的模式1
	TH1=(65536-500)/256;
	TL1=(65536-500)%256;
	P0=0x00;
	EA=1;
	while(1)
	{
    
    
	
	  Button_Scan();//按键扫描函数
	  Handler();
	 	 
	}

}

void Time1_Handler(void) interrupt 3 using 1
{
    
    
	buzzer=~buzzer; 
	TH1=value/256;
	TL1=value%256;
}