1  // SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
 2  // SPDX-License-Identifier: MIT
 3  /*
 4   * This example shows how read the potentiometer on the I2C QT Slide Potentiometer
 5   * and make the NeoPixels change too!
 6   */
 7  
 8  #include "Adafruit_seesaw.h"
 9  #include <seesaw_neopixel.h>
10  
11  #define  DEFAULT_I2C_ADDR 0x30
12  #define  ANALOGIN   18
13  #define  NEOPIXELOUT 14
14  
15  Adafruit_seesaw seesaw1;
16  Adafruit_seesaw seesaw2;
17  seesaw_NeoPixel pixels1 = seesaw_NeoPixel(4, NEOPIXELOUT, NEO_GRB + NEO_KHZ800);
18  seesaw_NeoPixel pixels2 = seesaw_NeoPixel(4, NEOPIXELOUT, NEO_GRB + NEO_KHZ800);
19  
20  void setup() {
21    Serial.begin(115200);
22    
23    //while (!Serial) delay(10);   // wait until serial port is opened
24  
25    Serial.println(F("Adafruit PID 5295 I2C QT Slide Potentiometer test!"));
26    
27    if (!seesaw1.begin(DEFAULT_I2C_ADDR) || !seesaw2.begin(DEFAULT_I2C_ADDR+1)) {
28      Serial.println(F("seesaws not found!"));
29      while(1) delay(10);
30    }
31  
32    uint16_t pid;
33    uint8_t year, mon, day;
34    
35    seesaw1.getProdDatecode(&pid, &year, &mon, &day);
36    Serial.print("seesaw found PID: ");
37    Serial.print(pid);
38    Serial.print(" datecode: ");
39    Serial.print(2000+year); Serial.print("/"); 
40    Serial.print(mon); Serial.print("/"); 
41    Serial.println(day);
42  
43    if (pid != 5295) {
44      Serial.println(F("Wrong seesaw PID"));
45      while (1) delay(10);
46    }
47  
48    if (!pixels1.begin(DEFAULT_I2C_ADDR) || !pixels2.begin(DEFAULT_I2C_ADDR+1)){
49      Serial.println("seesaw pixels not found!");
50      while(1) delay(10);
51    }
52  
53    Serial.println(F("seesaw started OK!"));
54  
55    pixels1.setBrightness(255);  // half bright
56    pixels2.setBrightness(255);  // half bright
57    pixels1.show(); // Initialize all pixels to 'off'
58    pixels2.show(); // Initialize all pixels to 'off'
59  }
60  
61  
62  
63  void loop() {
64    // read the potentiometer
65    uint16_t slide1_val = seesaw1.analogRead(ANALOGIN);
66    uint16_t slide2_val = seesaw2.analogRead(ANALOGIN);
67    Serial.print(slide1_val);
68    Serial.print(", ");
69    Serial.println(slide2_val);
70  
71    for (uint8_t i=0; i< pixels1.numPixels(); i++) {
72      pixels1.setPixelColor(i, Wheel(slide1_val / 4));
73      pixels2.setPixelColor(i, Wheel(slide2_val / 4));
74    }
75    pixels1.show();
76    pixels2.show();
77    
78    delay(50);
79  }
80  
81  
82  
83  // Input a value 0 to 255 to get a color value.
84  // The colours are a transition r - g - b - back to r.
85  uint32_t Wheel(byte WheelPos) {
86    WheelPos = 255 - WheelPos;
87    if(WheelPos < 85) {
88      return seesaw_NeoPixel::Color(255 - WheelPos * 3, 0, WheelPos * 3);
89    }
90    if(WheelPos < 170) {
91      WheelPos -= 85;
92      return seesaw_NeoPixel::Color(0, WheelPos * 3, 255 - WheelPos * 3);
93    }
94    WheelPos -= 170;
95    return seesaw_NeoPixel::Color(WheelPos * 3, 255 - WheelPos * 3, 0);
96  }