【安信可BW16-Kit】点灯+rgb
<div class='showpostmsg'><p>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。</p><p>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。</p>
<p><strong>硬件连接</strong>：</p>
<ol>
<li>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。</li>
<li>将RGB LED灯的负极（短脚）连接到GND引脚。</li>
</ol>
<p>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。</p>
<ol>
<li>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。</li>
<li>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：</li>
</ol>
<p>原理图：</p>
<p> 参考代码：</p>
<pre>
<code>#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
}</code></pre>
<p>实现的代码：</p>
<pre>
<code>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
}</code></pre>
<p><strong>上传与测试</strong>：</p>
<ol>
<li>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。</li>
<li>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。</li>
</ol>
<p>实际显示效果：</p>
<p>bcc6dc1872b659aa7d72a701dc50e89a<br />
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