数字量LED显示案例：
cocube测试led刷新
代码如下：
for(DELAYVAL=1;DELAYVAL<10;DELAYVAL++)
{
// The first NeoPixel in a strand is #0, second is 1, all the way up
// to the count of pixels minus one.
for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
// Here we're using a moderately bright green color:
pixels.setPixelColor(i, pixels.Color(1, 0, 0));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop
}
for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
// Here we're using a moderately bright green color:
pixels.setPixelColor(i, pixels.Color(0, 1, 0));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop
}
for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
// Here we're using a moderately bright green color:
pixels.setPixelColor(i, pixels.Color(0, 0, 1));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop
}
for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
// Here we're using a moderately bright green color:
pixels.setPixelColor(i, pixels.Color(1, 1, 0));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop
}
for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
// Here we're using a moderately bright green color:
pixels.setPixelColor(i, pixels.Color(0, 1, 1));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop
}
for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
// Here we're using a moderately bright green color:
pixels.setPixelColor(i, pixels.Color(1, 0, 1));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop
}
for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
// Here we're using a moderately bright green color:
pixels.setPixelColor(i, pixels.Color(1, 1, 1));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop
}
}
注释为原版程序，未作修改。
简单解释一下：
// NeoPixel Ring 简单草图 (c) 2013 Shae Erisson
// 在 GPLv3 许可下发布以匹配其余的
// Adafruit NeoPixel 库参考：Adafruit_NeoPixel
// 在设置 NeoPixel 库时，设置有多少像素，
// 以及使用哪个引脚发送信号。 请注意，对于旧版 NeoPixel
// 删除可能需要更改的第三个参数——参见
// strandtest 示例以获取有关可能值的更多信息。NUMPIXELS是LED数量，8*8一共64个。
DELAYVAL是刷新时延，1ms-9ms。
pixels.setPixelColor(i, pixels.Color(1, 0, 0));
分别为RGB颜色显示。
pixels.Color(1, 0, 0) 红色亮度1
pixels.Color(0, 1, 0) 绿色亮度1
pixels.Color(0, 0, 1) 蓝色亮度1
pixels.Color(255, 0, 0) 红色亮度255
pixels.Color(0, 255, 0) 绿色亮度255
pixels.Color(0, 0, 255) 蓝色亮度255
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
