振动声音放大与统计设计

论文总字数：4407字

#include lt;U8glib.hgt; //声明库

U8GLIB_ST7920_128X64_4X u8g(13, 12, 11); // 声明液晶屏 13=sck, 12=mosi, 11=cs

int Input = A0; //声明输入引脚

int Key_add = 8; //声明按钮引脚

int Key_sub = 9;

int Key_hold = 10;

int x,y; //声明坐标

int i,i1,i2,V_min,V_max,V_mid,t,t0,t1,sta,Key=1,hold=0;

long Freq;

float Vpp;

int Y[96]; //声明信号值储存数组

int Buffer[192];

const uint8_t L[] PROGMEM = {

};

void setup( )

{

pinMode(Key_add,INPUT);

digitalWrite(Key_add,HIGH);

pinMode(Key_sub,INPUT);

digitalWrite(Key_sub,HIGH);

pinMode(Key_hold,INPUT);

digitalWrite(Key_hold,HIGH);

ADMUX=0xe0;

ADCSRA=0xe2;

u8g.setFont(u8g_font_5x7);

u8g.firstPage();

do {

u8g.drawBitmapP( 0, 0, 16, 64, L);

} while( u8g.nextPage() );

delay(2000);

}

void loop( )

{

sample( );

Measure( );

Transform( );

Key_scan( );

if(hold==0)

{

u8g.firstPage( );

do

{

draw( );

}

while( u8g.nextPage( ));

}

}

void sample( )

{ for(i = 0;i lt; 192;i )

{

Buffer[i] = ADCH;

switch(Key)

{

case 1:

break;

case 2:

delayMicroseconds(4);

break;

case 3:

delayMicroseconds(10);

break;

case 4:

delayMicroseconds(23);

break;

case 5:

delayMicroseconds(60);

break;

case 6:

delayMicroseconds(123);

break;

case 7:

delayMicroseconds(248);

break;

case 8:

delayMicroseconds(623);

break;

case 9:

delayMicroseconds(1247);

break;

default:break;

}

}

}

void Measure()

{

V_max=Buffer[0];

V_min=Buffer[0];

for(i=0;ilt;192;i )

{

if(Buffer[i]gt;V_max)

V_max=Buffer[i];

if(Buffer[i]lt;V_min)

V_min=Buffer[i];

}

V_mid=(V_max V_min)/2;

Vpp=(V_max-V_min)*1.1/255;

for(i=0;ilt;97;i )

{

if(Buffer[i]lt;V_midamp;amp;Buffer[i 1]gt;=V_mid)

{

i1=i;

break;

}

}

for(i=i1 1;ilt;98 i1;i )

{

if(Buffer[i]lt;V_midamp;amp;Buffer[i 1]gt;=V_mid)

{

i2=i;

break;

}

}

t=i2-i1;

if(tgt;0)

Freq=8000/t;

else

Freq=0;

}

void Transform( )

{

for(sta=0;stalt;96;sta )

{

if(Buffer[sta]lt;128amp;amp;Buffer[sta 2]gt;128)

break;

}

for(i = 0;i lt; 96;i )

Y[i] = 63-(Buffer[i sta]gt;gt;2);

}

void draw( )

{

for(x = 0;x lt; 95;x )

u8g.drawLine(x,Y[x],x,Y[x 1]); //画线

//画边框

u8g.drawFrame(0,0,97,64);

// 画坐标轴

u8g.drawLine(48,0,48,63);

u8g.drawLine(0,32,96,32);

for(x=0;xlt;96;x =8)

u8g.drawLine(x,31,x,33);

for(y=0;ylt;64;y =8)

u8g.drawLine(47,y,49,y);

//画网格

for(x=8;xlt;96;x =8)

{

for(y=8;ylt;64;y =8)

u8g.drawPixel(x,y);

}

//显示参数

u8g.drawStr(98,7,"MS/div");

u8g.drawStr(98,23,"V/div");

u8g.drawStr(98,30,"0.162");

u8g.drawStr(98,40,"Vpp");

u8g.setPrintPos( 98, 47);

u8g.print(Vpp);

u8g.drawStr(118,47,"V");

u8g.drawStr(98,55,"F(HZ)");

switch(Key)

{

case 1:

u8g.drawStr(98,14,"0.02");

u8g.setPrintPos( 98, 62);

u8g.print(Freq*50);

break;

case 2:

u8g.drawStr(98,14,"0.05");

u8g.setPrintPos( 98, 62);

u8g.print(Freq*20);

break;

case 3:

u8g.drawStr(98,14," 0.1");

u8g.setPrintPos( 98, 62);

u8g.print(Freq*10);

break;

case 4:

u8g.drawStr(98,14," 0.2");

u8g.setPrintPos( 98, 62);

u8g.print(Freq*5);

break;

case 5:

u8g.drawStr(98,14," 0.5");

u8g.setPrintPos( 98, 62);

u8g.print(Freq*2);

break;

case 6:

u8g.drawStr(98,14," 1");

u8g.setPrintPos( 98, 62);

u8g.print(Freq);

break;

case 7:

u8g.drawStr(98,14," 2");

u8g.setPrintPos( 98, 62);

u8g.print(Freq/2);

break;

case 8:

u8g.drawStr(98,14," 5");

u8g.setPrintPos( 98, 62);

u8g.print(Freq/5);

break;

case 9:

u8g.drawStr(98,14," 10");

u8g.setPrintPos( 98, 62);

u8g.print(Freq/10);

break;

default:break;

}

}

//键盘扫描

void Key_scan()

{

if(digitalRead(Key_add)==LOW)

{

while(digitalRead(Key_add)==LOW);

Key ;

if(Key==10)

Key=9;

delay(10);

}

if(digitalRead(Key_sub)==LOW)

{

while(digitalRead(Key_sub)==LOW);

Key--;

if(Key==0)

Key=1;

delay(10);

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