Arduino.md

Arduino

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1. 特性

HIGH 等于 1
LOW 等于 0

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2. 界面

2.1 直观显示

Tools -> Serial Monitor (可获取Serial.println打印的信息) Tools -> Serial Plotter (绘制 随时间变化的量 的图表)

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3. 示例

3.1 电位器

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  // print out the value you read:
  Serial.println(sensorValue); // [0,1023], 线性变化, 对应电压[0,5]V
  delay(1);  // delay in between reads for stability
}

3.2 电位器控制LED

// get it form the potentiometer, [0,1023]
sensorValue = analogRead(analogInPin);

// analogWrite function only accepts [0,255]
outputValue = map(sensorValue, 0, 1023, 0, 255); 

// write it to a PWM pin
analogWrite(analogOutPin, outputValue);

3.3 将PWM方波输出转为连续的模拟电压

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