初始化提交

arduino-cli/libraries/Adafruit_Circuit_Playground/examples/external_neopixels/external_neopixels.ino

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+#include <Adafruit_CircuitPlayground.h>
+// do NOT include the standard NeoPixel library
+
+#define NEOPIX_PIN    A2
+#define NUM_PIXELS    5
+
+// use Adafruit_CPlay_NeoPixel to create a separate external NeoPixel strip
+Adafruit_CPlay_NeoPixel strip = Adafruit_CPlay_NeoPixel(NUM_PIXELS, NEOPIX_PIN, NEO_GRB + NEO_KHZ800);
+
+void setup() {
+  // initialize the Circuit Playground as usual
+  // this will initialize the onboard NeoPixels as well
+  CircuitPlayground.begin();
+
+  // initialize external NeoPixel strip separately
+  strip.begin();
+}
+
+void loop() {
+  // for the on board NeoPixels, use the CircuitPlayground functions
+  CircuitPlayground.clearPixels();
+  
+  // for the external NeoPixels, must use the Adafruit_CPlay_NeoPixel functions directly
+  strip.clear();
+  strip.show();
+
+  delay(500);
+
+  CircuitPlayground.setPixelColor(0, 255,   0,   0);
+  CircuitPlayground.setPixelColor(1, 128, 128,   0);
+  CircuitPlayground.setPixelColor(2,   0, 255,   0);
+  CircuitPlayground.setPixelColor(3,   0, 128, 128);
+  CircuitPlayground.setPixelColor(4,   0,   0, 255);
+  
+  CircuitPlayground.setPixelColor(5, 0xFF0000);
+  CircuitPlayground.setPixelColor(6, 0x808000);
+  CircuitPlayground.setPixelColor(7, 0x00FF00);
+  CircuitPlayground.setPixelColor(8, 0x008080);
+  CircuitPlayground.setPixelColor(9, 0x0000FF);
+
+  // some functions are the same
+  strip.setPixelColor(0, 255,   0,   0);
+  strip.setPixelColor(1, 128, 128,   0);
+  strip.setPixelColor(2,   0, 255,   0);
+  strip.setPixelColor(3,   0, 128, 128);
+  strip.setPixelColor(4,   0,   0, 255);
+  
+  // but for the external strip, must call show()
+  strip.show();
+
+  delay(5000);
+}