blink

1. 硬件连接,如下图所示，将LED模块连接到拓展板P0引脚。

2. 选择mPython V3开发板

3. 选择板子对应的串口

4. 示例代码

示例-blink.ino

/*
  Blink
*/
#define PIN_LED P0

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(PIN_LED, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(PIN_LED, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // wait for a second
  digitalWrite(PIN_LED, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);                      // wait for a second
}

5. 编译并上传

代码上传后，掌控板会自动运行代码，LED会闪烁。

analogRead() analogWrite()

1. 硬件连接,如下图所示，将LED模块连接到拓展板P1引脚，旋钮电位器接P0。

2. 示例代码

示例-analog.ino

/*
  模拟输入 模拟输出 串口输出示例
  读旋钮电位器值，把值映射到0-255，再通过
  模拟输出控制LED亮度，串口打印输出值。
*/

// These constants won't change. They're used to give names to the pins used:
const int analogInPin = P0;  // Analog input pin that the potentiometer is attached to
const int analogOutPin = P1;  // Analog output pin that the LED is attached to

int sensorValue = 0;  // value read from the pot
int outputValue = 0;  // value output to the PWM (analog out)

void setup() {
  // initialize serial communications at 9600 bps:
  Serial.begin(115200);
}

void loop() {
  // read the analog in value:
  sensorValue = analogRead(analogInPin);
  // map it to the range of the analog out:
  outputValue = map(sensorValue, 0, 4095, 0, 255);
  // change the analog out value:
  analogWrite(analogOutPin, outputValue);

  // print the results to the Serial Monitor:
  Serial.print("sensor = ");
  Serial.print(sensorValue);
  Serial.print("\t output = ");
  Serial.println(outputValue);

  // wait 2 milliseconds before the next loop for the analog-to-digital
  // converter to settle after the last reading:
  delay(200);
}

3. 运行效果

代码上传后，接在P1的LED会根据P0引脚的模拟输入值调整亮度， 串口打印P0采样值及模拟输出值。