neopixel trinkey examples

Adding basic examples for NeoPixel Trinkey guide

Neo_Trinkey_Examples/Arduino_Digital_Input/Arduino_Digital_Input.ino

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+// SPDX-FileCopyrightText: 2024 ladyada for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include <Adafruit_NeoPixel.h>
+
+Adafruit_NeoPixel pixel(1, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800);
+
+const int buttonPin = MISO;
+
+int buttonState = 0;
+
+void setup() {
+  Serial.begin(115200);
+  pinMode(buttonPin, INPUT);
+  pixel.begin();
+  pixel.setBrightness(10);
+  pixel.show();
+}
+
+void loop() {
+  buttonState = digitalRead(buttonPin);
+
+  if (buttonState == HIGH) {
+    pixel.setPixelColor(0, 0x0);
+    pixel.show();
+  } else {
+    pixel.setPixelColor(0, 0xFF0000);
+    pixel.show();
+  }
+  delay(100);
+}

Neo_Trinkey_Examples/Arduino_DotStar/Arduino_DotStar.ino

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+// SPDX-FileCopyrightText: 2024 ladyada for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include <Adafruit_DotStar.h>
+
+#define NUMPIXELS 30
+Adafruit_DotStar  dotstrip(NUMPIXELS, PIN_DATA, PIN_CLOCK, DOTSTAR_BRG);
+
+void setup() {
+  Serial.begin(115200);
+  
+  dotstrip.begin();
+  dotstrip.setBrightness(25);
+  dotstrip.show();
+
+}
+
+uint16_t firstPixelHue = 0;
+
+void loop() {  
+  firstPixelHue += 256;
+  
+  for(int i=0; i<dotstrip.numPixels(); i++) {
+    int pixelHue = firstPixelHue + (i * 65536L / dotstrip.numPixels());
+    dotstrip.setPixelColor(i, dotstrip.gamma32(dotstrip.ColorHSV(pixelHue)));
+  }
+  dotstrip.show();
+  delay(10);
+
+}

Neo_Trinkey_Examples/Arduino_NeoPixel/Arduino_NeoPixel.ino

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+// SPDX-FileCopyrightText: 2024 ladyada for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include <Adafruit_NeoPixel.h>
+
+#define NUMPIXELS 30
+Adafruit_NeoPixel neostrip(NUMPIXELS, PIN_DATA, NEO_GRB + NEO_KHZ800);
+
+void setup() {
+  Serial.begin(115200);
+
+  neostrip.begin();
+  neostrip.setBrightness(25);
+  neostrip.show();
+
+}
+
+uint16_t firstPixelHue = 0;
+
+void loop() {  
+  firstPixelHue += 256;
+  for(int i=0; i<neostrip.numPixels(); i++) {
+      int pixelHue = firstPixelHue + (i * 65536L / neostrip.numPixels());
+      neostrip.setPixelColor(i, neostrip.gamma32(neostrip.ColorHSV(pixelHue)));
+    }
+  neostrip.show();
+  
+  delay(10);
+
+}

Neo_Trinkey_Examples/CircuitPython_Digital_Input/code.py

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+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""CircuitPython Digital Input example
+Blinking a built-in NeoPixel LED using a button switch.
+
+"""
+import board
+import digitalio
+import neopixel
+
+pixel = neopixel.NeoPixel(board.NEOPIXEL, 1)
+
+button = digitalio.DigitalInOut(board.D4)
+button.switch_to_input(pull=digitalio.Pull.UP)
+
+while True:
+    if not button.value:
+        pixel.fill((255, 0, 0))
+    else:
+        pixel.fill((0, 0, 0))

Neo_Trinkey_Examples/CircuitPython_DotStar/code.py

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+# SPDX-FileCopyrightText: 2024 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+from rainbowio import colorwheel
+import adafruit_dotstar as dotstar
+
+clock_pin = board.CLOCK
+data_pin = board.DATA
+num_dots = 30
+speed = 0.01
+brightness = 0.2
+order = "PGBR" # PGBR, PGRB, PRBG or PRGB
+dots = dotstar.DotStar(clock_pin, data_pin, num_dots,
+					   brightness=brightness, auto_write=True,
+					   pixel_order=order)
+
+hue = 0
+dots.fill(colorwheel(hue))
+
+while True:
+    hue = (hue + 1) % 256
+    dots.fill(colorwheel(hue))
+    time.sleep(speed)

Neo_Trinkey_Examples/CircuitPython_NeoPixel/code.py

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+# SPDX-FileCopyrightText: 2024 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+from rainbowio import colorwheel
+import neopixel
+
+pixel_pin = board.DATA
+num_pixels = 30
+speed = 0.01
+brightness = 0.5
+order = "GRB" # "GRBW" for RGBW NeoPixels
+pixels = neopixel.NeoPixel(pixel_pin, num_pixels,
+                           brightness=brightness, auto_write=True,
+                           pixel_order=order)
+hue = 0
+pixels.fill(colorwheel(hue))
+
+while True:
+    hue = (hue + 1) % 256
+    pixels.fill(colorwheel(hue))
+    time.sleep(speed)