arduino ibox项目实战16－tonekeyboard实验 - 九鼎创展论坛

打开arduino的IDE开发工具，依次点击文件->示例->02.Digital->toneKeyboard，toneKeyboard的示例程序将会被打开，其源码如下：

#include "pitches.h"
const int threshold = 10; // minimum reading of the sensors that generates a note
// notes to play, corresponding to the 3 sensors:
int notes[] = {
NOTE_A4, NOTE_B4, NOTE_C3
};
void setup() {
}
void loop() {
for (int thisSensor = A0; thisSensor < A3; thisSensor++) {
// get a sensor reading:
int sensorReading = analogRead(thisSensor);
// if the sensor is pressed hard enough:
if (sensorReading > threshold) {
// play the note corresponding to this sensor:
tone(PWM0, notes[thisSensor - A0], 20);
delay(20);
}
}
}

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