【Intel Edison试用体验】项目一音乐彩灯

ti

本帖最后由 dvd1478 于 2016-8-3 11:29 编辑

随手做的一个练习，红蓝绿三个LED灯，随着音乐的变化而发生变化。
音乐是由蜂鸣器产生的，响声的长度决定着音调
timeHigh = period / 2 = 1 / (2 * toneFrequency)

* 音的表示方法是       1  2  3  4  5 6  7
* 音的名称（也就是音名） C  D  E  F  G A  B
* 音的唱名（也就是唱法） DO RE MI FA SOL LA SI
*
* note  frequency    period    timeHigh
* c       261 Hz       3830       1915
* d       294 Hz       3400       1700
* e       329 Hz       3038       1519
* f       349 Hz       2864       1432
* g       392 Hz       2550       1275
* a       440 Hz       2272       1136
* b       493 Hz       2028       1014
* C       523 Hz       1912       956

Edison 采用arduino的编译器进行下载
代码如下：

/* Melody
* (cleft) 2005 D. Cuartielles for K3
*
* This example uses a piezo speaker to play melodies. It sends
* a square wave of the appropriate frequency to the piezo, generating
* the corresponding tone.
*
* The calculation of the tones is made following the mathematical
* operation:
*
* timeHigh = period / 2 = 1 / (2 * toneFrequency)
*
* where the different tones are described as in the table:
*
* 音的表示方法是 1 2 3 4 5 6 7
* 音的名称（也就是音名） C D E F G A B
* 音的唱名（也就是唱法） DO RE MI FA SOL LA SI
*
* note frequency period timeHigh
* c 261 Hz 3830 1915
* d 294 Hz 3400 1700
* e 329 Hz 3038 1519
* f 349 Hz 2864 1432
* g 392 Hz 2550 1275
* a 440 Hz 2272 1136
* b 493 Hz 2028 1014
* C 523 Hz 1912 956
*
* http://www.arduino.cc/en/Tutorial/Melody
*/
int speakerPin = 2; // Grove Buzzer connect to D3
int length = 15; // the number of notes // 音调的数目
char notes[] = "ccggaagffeeddc "; // a space represents a rest // 字符最后的空格代表乐曲间的休息
int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
int tempo = 300;
/* 拍子的时长,
音乐里的牌子是更具乐曲要求而定的。如果说乐曲寻求规定的速度是每分60拍的话，那么没拍占用的时间就是60分之一，
也就是一秒,半拍为二分之一秒。若规定速度为每分钟120拍的话，那么灭一排站的时间是半秒，半拍十四分之一秒。
以此类推，这是拍值。当各种牌制定下来以后，各种拍之也就与牌子连在一起。比如，2/4拍，是以四分音符为一拍，每小节有两拍
http://blog.sina.com.cn/s/blog_5ef4d679010172do.html
*/
const int pinLedRed = 3;
const int pinLedGreen = 4;
const int pinLedBlue = 5;
void selectRGB(int i)
{
switch (i)
{
case 0:
digitalWrite(pinLedRed,HIGH);//红色LED亮
digitalWrite(pinLedGreen,LOW);
digitalWrite(pinLedBlue,LOW);
break;
case 1:
digitalWrite(pinLedRed,HIGH);//红、绿色LED亮
digitalWrite(pinLedGreen,HIGH);
digitalWrite(pinLedBlue,LOW);
break;
case 2:
digitalWrite(pinLedRed,LOW);//绿色LED亮
digitalWrite(pinLedGreen,HIGH);
digitalWrite(pinLedBlue,LOW);
break;
case 3:
digitalWrite(pinLedRed,LOW);//绿、蓝色LED亮
digitalWrite(pinLedGreen,HIGH);
digitalWrite(pinLedBlue,HIGH);
break;
case 4:
digitalWrite(pinLedRed,LOW);//蓝色LED亮
digitalWrite(pinLedGreen,LOW);
digitalWrite(pinLedBlue,HIGH);
break;
case 5:
digitalWrite(pinLedRed,HIGH);//红、蓝色LED亮
digitalWrite(pinLedGreen,LOW);
digitalWrite(pinLedBlue,HIGH);
break;
case 6:
digitalWrite(pinLedRed,HIGH);//红、绿、蓝色LED亮
digitalWrite(pinLedGreen,HIGH);
digitalWrite(pinLedBlue,HIGH);
break;
default:
digitalWrite(pinLedRed,LOW);//全灭
digitalWrite(pinLedGreen,LOW);
digitalWrite(pinLedBlue,LOW);
break;
}
}
void playTone(int tone, int duration) {
for (long i = 0; i < duration * 1000L; i += tone * 2) {
digitalWrite(speakerPin, HIGH);
//digitalWrite(pinLed, HIGH);
delayMicroseconds(tone);
digitalWrite(speakerPin, LOW);
//digitalWrite(pinLed, LOW);
delayMicroseconds(tone);
}
}
void playNote(char note, int duration) {
char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
// play the tone corresponding to the note name
for (int i = 0; i < 8; i++) {
// 按音调名演奏音调
if (names[i] == note) {
playTone(tones[i], duration);
selectRGB(i);
}
}
}
void setup()
{
pinMode(speakerPin, OUTPUT);
// Configure the LED's pin for output signals.
pinMode(pinLedRed, OUTPUT);
pinMode(pinLedGreen, OUTPUT);
pinMode(pinLedBlue, OUTPUT);
}
void loop()
{
for (int i = 0; i < length; i++)
{
if (notes[i] == ' ')
{
delay(beats[i] * tempo); // rest
}
else
{
playNote(notes[i], beats[i] * tempo);
}
// pause between notes
delay(tempo / 2);
}
}

复制代码

birdinskydzfsy · 2016-8-11 17:32:49

求效果图呢

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【Intel Edison试用体验】项目一音乐彩灯

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