87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
// SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
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// SPDX-License-Identifier: MIT
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/*
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* This example shows how read the potentiometer on the I2C QT Slide Potentiometer
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* and make the NeoPixels change too!
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*/
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#include "Adafruit_seesaw.h"
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#include <seesaw_neopixel.h>
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#define DEFAULT_I2C_ADDR 0x30
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#define ANALOGIN 18
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#define NEOPIXELOUT 14
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Adafruit_seesaw seesaw;
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seesaw_NeoPixel pixels = seesaw_NeoPixel(4, NEOPIXELOUT, NEO_GRB + NEO_KHZ800);
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void setup() {
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Serial.begin(115200);
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//while (!Serial) delay(10); // wait until serial port is opened
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Serial.println(F("Adafruit PID 5295 I2C QT Slide Potentiometer test!"));
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if (!seesaw.begin(DEFAULT_I2C_ADDR)) {
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Serial.println(F("seesaw not found!"));
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while(1) delay(10);
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}
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uint16_t pid;
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uint8_t year, mon, day;
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seesaw.getProdDatecode(&pid, &year, &mon, &day);
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Serial.print("seesaw found PID: ");
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Serial.print(pid);
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Serial.print(" datecode: ");
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Serial.print(2000+year); Serial.print("/");
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Serial.print(mon); Serial.print("/");
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Serial.println(day);
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if (pid != 5295) {
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Serial.println(F("Wrong seesaw PID"));
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while (1) delay(10);
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}
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if (!pixels.begin(DEFAULT_I2C_ADDR)){
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Serial.println("seesaw pixels not found!");
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while(1) delay(10);
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}
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Serial.println(F("seesaw started OK!"));
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pixels.setBrightness(255); // half bright
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pixels.show(); // Initialize all pixels to 'off'
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}
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void loop() {
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// read the potentiometer
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uint16_t slide_val = seesaw.analogRead(ANALOGIN);
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Serial.println(slide_val);
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for (uint8_t i=0; i< pixels.numPixels(); i++) {
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pixels.setPixelColor(i, Wheel(slide_val / 4));
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}
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pixels.show();
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delay(50);
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}
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// Input a value 0 to 255 to get a color value.
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// The colours are a transition r - g - b - back to r.
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uint32_t Wheel(byte WheelPos) {
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WheelPos = 255 - WheelPos;
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if(WheelPos < 85) {
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return seesaw_NeoPixel::Color(255 - WheelPos * 3, 0, WheelPos * 3);
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}
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if(WheelPos < 170) {
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WheelPos -= 85;
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return seesaw_NeoPixel::Color(0, WheelPos * 3, 255 - WheelPos * 3);
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}
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WheelPos -= 170;
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return seesaw_NeoPixel::Color(WheelPos * 3, 255 - WheelPos * 3, 0);
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}
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