[Follow me Season 2 Episode 2] Smart Home - Smart Study Room - Getting Started Tasks

鲜de芒果

[Follow me Season 2 Episode 2] Smart Home - Smart Study Room - Getting Started Tasks [Copy link]

 

1. Task Requirements

Build the environment and start the first step Blink / Serial port print Hello EEWorld!

2. Arduino development environment construction

1. Download Arduino IDE
2. Unzip and extract the downloaded Arduino IDE to disk.
   

3. Open the unzipped folder and double-click to run Arduino IDE.exe
   

The first time you open the Arduino IDE, it will look like this:

3. Code Implementation

/**
 * FollowMe 2-2 任务1：
 * 1. 搭建环境并开启第一步Blink 
 * 2. 串口打印 Hello EEWorld！
 */
#define MIN_VAL 0           // PWM分辨率最小值
#define MAX_VAL 255         // PWM分辨率最大值
uint32_t tick = 0;          // loop 循环次数
uint32_t fadeValue = 0;     // 呼吸灯PWM占空比
uint8_t fadeStep = 5;       // 呼吸灯步长
bool isFadeIn = true;       // 当前呼吸灯状态，true：表示由暗转亮，false：表示由亮转暗

void setup() {
  // 初始化串口
  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);
  delay(1000);
  // 串口打印
  Serial.println("Hello EEWorld！");
}

void loop(){
  if(0 == (tick % 40)) { // 每隔1秒串口打印一次loop函数当前循环次数。loop中每次执行延时25毫秒，因此，loop每执行40次正好是1秒钟。
    Serial.print("loop count: "); // 打印loop函数当前循环次数
    Serial.println(tick);
  }
  
  // PWM输出驱动板载LED
  analogWrite(LED_BUILTIN, fadeValue);
  // 呼吸灯由暗转亮
  if(isFadeIn) {
    fadeValue += fadeStep;
    if(MAX_VAL <= fadeValue) {
      // 当呼吸灯PWM占空比大于等于 PWM 分辨率最大值时，翻转呼吸灯状态。
      fadeValue = MAX_VAL;
      isFadeIn = !isFadeIn; 
    }
  } else { // 呼吸灯由亮转暗
    fadeValue -= fadeStep;
    if(MIN_VAL >= fadeValue) {
      // 当呼吸灯PWM占空比小于等于 PWM 分辨率最小值时，翻转呼吸灯状态。
      fadeValue = MIN_VAL;
      isFadeIn = !isFadeIn; 
    }
  }
  delay(25); // 每30毫秒更新一次PWM占空比
  tick ++;
}

4. Effect display