[原创] 【安信可BW16-Kit】点灯+rgb

meiyao   2024-3-31 13:28 楼主

在使用安信可BW16-Kit来点亮RGB LED灯时,完成一系列步骤,确保硬件正确连接、环境配置妥当,并编写合适的代码来控制RGB LED灯的颜色和亮度。

先了解RGB LED灯的工作原理。RGB LED灯由红、绿、蓝三种颜色的LED芯片组成,通过调整每种颜色LED的亮度,可以混合出各种颜色。因此,您需要分别控制这三个颜色的LED芯片。

硬件连接

  1. 将RGB LED灯的正极(长脚)分别连接到BW16-Kit的三个GPIO引脚(PA12、PA14、PA13),每个颜色对应一个引脚。
  2. 将RGB LED灯的负极(短脚)连接到GND引脚。

请注意,根据RGB LED灯的类型和规格,您可能需要在LED灯与GPIO引脚之间添加适当的限流电阻,以防止电流过大损坏LED灯或BW16-Kit。

  1. 确保您的开发环境已经配置好,包括安装了Arduino IDE和必要的板级包。
  2. 创建一个新的Arduino项目,并编写代码来控制RGB LED灯。以下是一个简单的示例代码,用于循环显示红、绿、蓝三种颜色:

原理图:

image.png   参考代码:

#define LED_R PA12 // 红色LED连接的引脚  
#define LED_G PA14 // 绿色LED连接的引脚  
#define LED_B PA13 // 蓝色LED连接的引脚  
  
void setup() {  
  pinMode(LED_R, OUTPUT);  
  pinMode(LED_G, OUTPUT);  
  pinMode(LED_B, OUTPUT);  
}  
  
void loop() {  
  // 显示红色  
  digitalWrite(LED_R, HIGH);  
  digitalWrite(LED_G, LOW);  
  digitalWrite(LED_B, LOW);  
  delay(1000); // 等待一秒  
  
  // 显示绿色  
  digitalWrite(LED_R, LOW);  
  digitalWrite(LED_G, HIGH);  
  digitalWrite(LED_B, LOW);  
  delay(1000); // 等待一秒  
  
  // 显示蓝色  
  digitalWrite(LED_R, LOW);  
  digitalWrite(LED_G, LOW);  
  digitalWrite(LED_B, HIGH);  
  delay(1000); // 等待一秒  
  
  // 重复上述过程  
}

实现的代码:

void setup() {
  // initialize digital pin's from all 3 colors as an output.
  pinMode(LED_R, OUTPUT);
  pinMode(LED_G, OUTPUT);
  pinMode(LED_B, OUTPUT);
}

// blink RED, GREEN, BLUE
void blink() {
  digitalWrite(LED_R, HIGH);  // turn the RED LED on (HIGH is the voltage level)
  delay(1000);                // wait for a second
  digitalWrite(LED_R, LOW);   // h:\Evaluation\BW16 KIT\led\led\led.inoturn the RED LED off by making the voltage LOW
  delay(1000);                // wait for a second
  digitalWrite(LED_G, HIGH);  // turn the GREEN LED on (HIGH is the voltage level)
  delay(1000);                // wait for a second
  digitalWrite(LED_G, LOW);   // turn the GREEN LED off by making the voltage LOW
  delay(1000);                // wait for a second
  digitalWrite(LED_B, HIGH);  // turn the BLUE LED on (HIGH is the voltage level)
  delay(1000);                // wait for a second
  digitalWrite(LED_B, LOW);   // turn the BLUE LED off by making the voltage LOW
  delay(1000);                // wait for a second
}

// fade RED and BLUE
void fade() {
  // fade RED in from min to max in increments of 5 points:
  for (int fadeValue = 0; fadeValue <= 255; fadeValue += 5) {
    // sets the value (range from 0 to 255):
    analogWrite(LED_R, fadeValue);
    // wait for 30 milliseconds to see the dimming effect
    delay(30);
  }

  // fade RED out from max to min in increments of 5 points:
  for (int fadeValue = 255; fadeValue >= 0; fadeValue -= 5) {
    // sets the value (range from 0 to 255):
    analogWrite(LED_R, fadeValue);
    // wait for 30 milliseconds to see the dimming effect
    delay(30);
  }

  // fade BLUE in from min to max in increments of 5 points:
  for (int fadeValue = 0; fadeValue <= 255; fadeValue += 5) {
    // sets the value (range from 0 to 255):
    analogWrite(LED_B, fadeValue);
    // wait for 30 milliseconds to see the dimming effect
    delay(30);
  }

  // fade BLUE out from max to min in increments of 5 points:
  for (int fadeValue = 255; fadeValue >= 0; fadeValue -= 5) {
    // sets the value (range from 0 to 255):
    analogWrite(LED_B, fadeValue);
    // wait for 30 milliseconds to see the dimming effect
    delay(30);
  }
}
// the loop function runs over and over again forever
void loop() {
  blink();      // blink RED, GREEN, BLUE
  fade();       // fade RED, BLUE
  delay(1000);  // wait for a second
}

上传与测试

  1. 选择正确的开发板和端口,在Arduino IDE中点击上传按钮,将代码烧录到BW16-Kit上。
  2. 观察RGB LED灯是否按照代码中的逻辑显示不同的颜色。如果LED灯没有按预期工作,请检查硬件连接和代码逻辑是否正确。

实际显示效果:

a1558b8bdf60ef8838ff96c6475b347d

 

 

 

 

 

 

 

 

 

 

 

 

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