YL-56可以检测声音的有无，工作在3.3-5v，灵敏度可调（通过调节电位器），该模块有三个口，VCC，GND，DQ，；有两个指示灯，一个为电源指示灯，另一个为开关指示灯（超过设定的阈值就亮），DQ没超过阈值输出高电平，超过就输出低电平。该模块相对简单，没有特定的驱动程序
下面附上我写的程序（检测到高声音蜂鸣器响lcd提示）
lcd库
#include <reg52.h>
#include "./delay/delay.h"
#include "./lcd/lcd.h"
#define LCDPORT P0
sbit RS = P2^4;
sbit RW = P2^5;
sbit E = P2^6;
void lcd_write(unsigned char byte, unsigned char flag)
{
if(flag)
{
RS = 1;
}
else
{
RS = 0;
}
RW = 0;
E = 1;
LCDPORT = byte;
delay_us(5);
E = 0;
}
void lcd_init()
{
delay_ms(15);
lcd_write(0x38, LCD_WRITE_COM);
delay_ms(5);
lcd_write(0x38, LCD_WRITE_COM);
delay_ms(5);
lcd_write(0x38, LCD_WRITE_COM);
lcd_write(0x08, LCD_WRITE_COM);
delay_ms(5);
lcd_write(0x01, LCD_WRITE_COM);
delay_ms(5);
lcd_write(0x06, LCD_WRITE_COM);
delay_ms(5);
lcd_write(0x0c, LCD_WRITE_COM);
delay_ms(5);
}
void lcd_dis_char(unsigned char x, unsigned char y, unsigned char byte)
{
unsigned char m;
if(y==1)
{
m = 0x00+0x80+x;
}
if(y==2)
{
m = 0x40+0x80+x;
}
lcd_write(m,LCD_WRITE_COM);
lcd_write(byte,LCD_WRITE_DATA);
}
void lcd_dis_string(unsigned x, unsigned char y, unsigned char * s)
{
unsigned char m;
unsigned char i = 0;
unsigned char *temp = s;
if(y==1)
{
m=0x00+0x80+x;
}
if(y==2)
{
m=0x40+0x80+x;
}
while(*temp != '\0')
{
lcd_write(m+i,LCD_WRITE_COM);
lcd_write(*temp,LCD_WRITE_DATA);
temp++;
i++;
}
}
delay库
void delay_us(unsigned char t)
{
while(--t);
}
void delay_ms(unsigned char t)
{
while(t--)
{
delay_us(245);
delay_us(245);
}
}
void delay_s(unsigned char t)
{
while(t--)
{
delay_ms(200);
delay_ms(200);
delay_ms(200);
delay_ms(200);
delay_ms(200);
} }
主程序
#include <reg51.h>
#include "./lcd/lcd.h"
#include "./delay/delay.h"
sbit DQ = P1^0;
sbit beep = P1^1;
void main()
{
unsigned char i;
lcd_init();
while(1)
{
if(DQ == 0)
{
lcd_dis_string(5,1,"stop make noise!");
for(i=0 ; i<200 ; i++)
{
beep = ~beep;
delay_us(200);
}
}
lcd_dis_string(5,1,"quiet,keeping!");
}
}
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