adding NeoDriver seesaw examples

Adding CircuitPython, Arduino and CircuitPython with extended bus examples for NeoDriver guide

NeoDriver_seesaw_Examples/Arduino_NeoDriver_strandtest/Arduino_NeoDriver_strandtest.ino

@@ -0,0 +1,80 @@
+// SPDX-FileCopyrightText: 2023 Phil B. for Adafruit Industries
+// SPDX-License-Identifier: MIT
+
+#include <seesaw_neopixel.h>
+#define PIN 15
+
+// Parameter 1 = number of pixels in strip
+// Parameter 2 = Arduino pin number (most are valid)
+// Parameter 3 = pixel type flags, add together as needed:
+//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
+//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
+//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
+//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
+//   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
+seesaw_NeoPixel strip = seesaw_NeoPixel(12, PIN, NEO_GRB + NEO_KHZ800);
+
+// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
+// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
+// and minimize distance between Arduino and first pixel.  Avoid connecting
+// on a live circuit...if you must, connect GND first.
+
+void setup() {
+  Serial.begin(115200);
+  
+  while (!Serial) delay(10);   // wait until serial port is opened
+  
+  if(!strip.begin(0x60)){
+    Serial.println("seesaw not found!");
+    while(1) delay(10);
+  }
+  
+  Serial.println(F("seesaw started OK!"));
+  
+  strip.show(); // Initialize all pixels to 'off'
+}
+
+void loop() {
+  rainbowCycle(20);
+
+}
+
+void rainbow(uint8_t wait) {
+  uint16_t i, j;
+
+  for(j=0; j<256; j++) {
+    for(i=0; i<strip.numPixels(); i++) {
+      strip.setPixelColor(i, Wheel((i+j) & 255));
+    }
+    strip.show();
+    delay(wait);
+  }
+}
+
+// Slightly different, this makes the rainbow equally distributed throughout
+void rainbowCycle(uint8_t wait) {
+  uint16_t i, j;
+
+  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
+    for(i=0; i< strip.numPixels(); i++) {
+      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
+    }
+    strip.show();
+    delay(wait);
+  }
+}
+
+// Input a value 0 to 255 to get a color value.
+// The colours are a transition r - g - b - back to r.
+uint32_t Wheel(byte WheelPos) {
+  WheelPos = 255 - WheelPos;
+  if(WheelPos < 85) {
+    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
+  }
+  if(WheelPos < 170) {
+    WheelPos -= 85;
+    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
+  }
+  WheelPos -= 170;
+  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
+}

NeoDriver_seesaw_Examples/CircuitPython_NeoDriver_seesaw/code.py

@@ -0,0 +1,25 @@
+# SPDX-FileCopyrightText: 2023 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+import busio
+from rainbowio import colorwheel
+from adafruit_seesaw import seesaw, neopixel
+
+i2c = busio.I2C(board.SCL, board.SDA)
+ss = seesaw.Seesaw(i2c, addr=0x60)
+neo_pin = 15
+num_pixels = 64
+
+pixels = neopixel.NeoPixel(ss, neo_pin, num_pixels, brightness = 0.1)
+
+color_offset = 0
+
+while True:
+    for i in range(num_pixels):
+        rc_index = (i * 256 // num_pixels) + color_offset
+        pixels[i] = colorwheel(rc_index & 255)
+    pixels.show()
+    color_offset += 1
+    time.sleep(0.01)

NeoDriver_seesaw_Examples/Extended_Bus_NeoDriver_seesaw/code.py

@@ -0,0 +1,27 @@
+# SPDX-FileCopyrightText: 2023 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+'''This example should only be used with Linux single board computers
+that require creating an I2C busio object by passing in the Bus ID'''
+
+import time
+from rainbowio import colorwheel
+from adafruit_extended_bus import ExtendedI2C as I2C
+from adafruit_seesaw import seesaw, neopixel
+
+i2c = I2C(1)
+ss = seesaw.Seesaw(i2c, addr=0x60)
+neo_pin = 15
+num_pixels = 64
+
+pixels = neopixel.NeoPixel(ss, neo_pin, num_pixels, brightness = 0.1)
+
+color_offset = 0
+
+while True:
+    for i in range(num_pixels):
+        rc_index = (i * 256 // num_pixels) + color_offset
+        pixels[i] = colorwheel(rc_index & 255)
+    pixels.show()
+    color_offset += 1
+    time.sleep(0.01)