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RotaryEncoder_HSV-NeoPixel_v.ino
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RotaryEncoder_HSV-NeoPixel_v.ino
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/* interrupt routine for Rotary Encoders
* drives NeoPixels and TFT screen over SPI
*
* A conglomeration by Craig Marston of many examples freely available
*
The average rotary encoder has three pins, seen from front: A C B
Clockwise rotation A(on)->B(on)->A(off)->B(off)
CounterCW rotation B(on)->A(on)->B(off)->A(off)
and may be a push switch with another two pins, pulled low at pin 8 in this case
Suited to an ATMega328
encoderPos is the variable that alters with the Rotary Encoder
*/
#include <Adafruit_NeoPixel.h>
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>
#define PIN 5 // Which pin on the Arduino is connected to the NeoPixels?
uint8_t NUMPIXELS = 9; // How many NeoPixels are attached to the Arduino?
// Parameter 1 = number of pixels in strip
// Parameter 2 = 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_GRB Pixels are wired for GRB bitstream (most NeoPixel products)
//Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRBW + NEO_KHZ800);
// try NEO_GRBW!!
uint16_t LEDhue = 54610; // initially magenta (16-bit colour wheel)
uint8_t LEDsat = 255; // full saturation (8-bit)
uint8_t LEDval = 64; // quarter brightness (8-bit)
uint32_t whiteLED = 32; // LEDval - LEDsat; // equation doesn't work adequately
uint32_t RGBW_number = 0;
// usually the rotary encoders three pins have the ground pin in the middle
enum PinAssignments { // I don't yet understand the 'enum' function!!
encoderPinA = 2, // right (labeled DT on our decoder)
encoderPinB = 3, // left (labeled CLK on our decoder)
rotEncButton = 4 // switch (labeled SW on our decoder)
// connect the +5v and gnd appropriately
};
volatile uint8_t encoderPos = 0; // a counter for the dial
// needs to be 8-bit and volatile so as to be independent of the interrupts
// note: the 8-bit limit is due to the ATMega328 processor
uint8_t lastReportedPos = 1; // change management
uint8_t encoderPosCheck = 1; // also change management!
static boolean rotating = false; // debounce management
// interrupt service routine vars
boolean A_set = false;
boolean B_set = false;
boolean rotEncButtonFlag = false; // variable for previous value of 'menu_item'
uint8_t menu_item = 1;
// === use these x-coords to position the groups of elements
uint8_t xH = 18; // x-position
uint8_t xS = 64; // corresponding to
uint8_t xV = 105; // each group of items
uint8_t yHSV = 120; // vertical pos. of bullets
#define TFT_CS 10
#define TFT_RST 9
#define TFT_DC 8
// The TFT uses the RGB565 colour-space instead of the more familiar RGB88
// You can find converters online because it's a pain to suss out…
#define RED 0x001F
#define BLUE 0xF800
#define paleBLUE 0xDEFF
#define GREEN 0x07E0
#define paleGREEN 0xDFFB
#define YELLOW 0x07FF
#define ORANGE 0x04FF
#define paleYELLOW 0xBFFF
#define PURPLE 0x780F
#define CYAN 0xFFE0
#define paleCYAN 0xFFF7
#define MAGENTA 0xF81F
#define paleMAGENTA 0xFDFF
#define lightBLUE 0xFD20
#define GREENYELLOW 0xAFE5
#define NAVY 0x000F
#define DARKGREEN 0x03E0
#define DARKCYAN 0x03EF
#define MAROON 0x7800
#define OLIVE 0x7BE0
#define WHITE 0xFFFF
#define cementGREY 0xBDF7
#define LIGHTGREY 0xC618
#define steelGREY 0xE71C
#define DARKGREY 0x7BEF
#define BLACK 0x0000
// https://learn.adafruit.com/adafruit-mini-tft-0-dot-96-inch-180x60-breakout/wiring-test
// Option 1 (recommended): must use the hardware SPI pins
// (for UNO thats sclk = 13 and sid = 11) and pin 10 must be
// an output. This is much faster - also required if you want
// to use the microSD card (see the image drawing example)
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);
// Option 2: use any pins but a little slower!
#define TFT_SCLK 13 // set these to be whatever pins you like!
#define TFT_MOSI 11 // set these to be whatever pins you like!
//Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);
// =====================================================================================================
// *°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°◊ Setup ◊°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*
// =====================================================================================================
void setup() {
// Use this initializer if you're using TFT
tft.initR(INITR_BLACKTAB); // initialize a ST7735S chip, black tab
tft.fillScreen(ST7735_BLACK);
// ===== Keep all the static graphic elements within 'Setup' =====
//tft.drawRoundRect(x,y,w,h,r,t); // bullets for menu options
tft.drawRoundRect(xH,yHSV,13,6,2,DARKGREEN);
tft.drawRoundRect(xS,yHSV,13,6,2,DARKGREEN);
tft.drawRoundRect(xV,yHSV,13,6,2,DARKGREEN);
rainbow(); // these icons are only drawn once and don't change
satIcon();
valIcon();
delay(1000);
pinMode(encoderPinA, INPUT_PULLUP); // pulled-up internally
pinMode(encoderPinB, INPUT_PULLUP); // input is active when
pinMode(rotEncButton, INPUT_PULLUP); // pulled to ground by switch
attachInterrupt(digitalPinToInterrupt(2), doEncoderA, CHANGE); // pin2 int0
attachInterrupt(digitalPinToInterrupt(3), doEncoderB, CHANGE); // pin3 int1
// h/ware interrupts on ATMega328
Serial.begin(9600); // output
strip.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
}
// =====================================================================================================
// *°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°◊ Main Loop ◊°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*°*
// =====================================================================================================
void loop() {
//tft.invertDisplay(false);
rotating = true; // reset the debouncer
if (lastReportedPos != encoderPos)
{
Serial.print("Index:");
Serial.println(encoderPos, DEC);
lastReportedPos = encoderPos;
}
if (digitalRead(rotEncButton) == LOW )
{
delay(5); // crude de-bounce
if (menu_item == 3 && rotEncButtonFlag == false)
{
rotEncButtonFlag = true;
menu_item = 1; // hue
encoderPos = LEDhue;
}
if (menu_item == 2 && rotEncButtonFlag == false)
{
rotEncButtonFlag = true;
menu_item = 3; // value
encoderPos = LEDval;
}
if (menu_item == 1 && rotEncButtonFlag == false)
{
rotEncButtonFlag = true;
menu_item = 2; // saturation
encoderPos = LEDsat;
}
strip.clear();
strip.show();
//delay(100);
while (digitalRead(rotEncButton) == LOW )
{
strip.setPixelColor(menu_item, strip.gamma32(strip.ColorHSV(32768, 255, 192))); // cyan
// using 'menu_item' alters the chosen pixel — handy for testing!
strip.show();
delay(250);
strip.clear();
strip.show();
}
}
switch (menu_item)
{
case 1:
LEDhue = encoderPos; // hue is a 16-bit value
// map to a 16-bit value map(value, fromLow, fromHigh, toLow, toHigh)
LEDhue = map(LEDhue, 0, 255, 0, 65535); // this operation expands the
// 8-bit values to 16-bit
// this means that the hue 'jumps' over quite a lot of values, but
// you don't have to turn the encoder as much to cycle through!!
rotEncButtonFlag = false;
//tft.fillRoundRect(x,y,w,h,r,t); // Hue
tft.fillRoundRect(xH,yHSV,13,6,2,DARKGREEN);
tft.fillRoundRect(xS+1,yHSV+1,11,4,2,BLACK); // the black covers over
tft.fillRoundRect(xV+1,yHSV+1,11,4,2,BLACK); // the other bullets
break;
case 2:
LEDsat = encoderPos;
rotEncButtonFlag = false;
tft.fillRoundRect(xH+1,yHSV+1,11,4,2,BLACK);
tft.fillRoundRect(xS,yHSV,13,6,2,DARKGREEN);
tft.fillRoundRect(xV+1,yHSV+1,11,4,2,BLACK);
break;
case 3:
LEDval = encoderPos;
rotEncButtonFlag = false;
tft.fillRoundRect(xH+1,yHSV+1,11,4,2,BLACK);
tft.fillRoundRect(xS+1,yHSV+1,11,4,2,BLACK);
tft.fillRoundRect(xV,yHSV,13,6,2,DARKGREEN);
break;
}
for ( uint8_t i = 0; i<strip.numPixels(); i++) // cycle through each pixel
{
//strip.setPixelColor(i, 10, 15, 20, whiteLED);
//strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(LEDhue, LEDsat, LEDval)) | (whiteLED << 24) );
//strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(LEDhue, LEDsat, LEDval)));
uint32_t HSV_number = strip.ColorHSV(LEDhue, LEDsat, LEDval);
// int constrainedInput = constrain(input, minimumValue, maximumValue);
// map will ultimately be better
uint16_t LEDwhite = ((255 - LEDsat) + LEDval); // this is a crude compensation formula
// map to a 16-bit value map(value, fromLow, fromHigh, toLow, toHigh)
whiteLED = map( LEDwhite, 0, 512, 0, 128); // because the white LED is über bright!!
// bitwise shifting the white LED's value into the 32-bit variable. The gamma function
// requires the white LED's value to be the Most Significant Byte, hence the bit-shifting.
RGBW_number = HSV_number | (whiteLED << 24); // *** *** *** this is processor intensive!! *** *** ***
Serial.print("RGBW_number in decimal:");
Serial.println(RGBW_number, DEC);
Serial.print("RGBW_number in hex:");
Serial.println(RGBW_number, HEX);
Serial.print("RGBW_number in binary:");
Serial.println(RGBW_number, BIN);
strip.setPixelColor(i, strip.gamma32(RGBW_number)); //
strip.show();
}
if (encoderPosCheck != encoderPos)
{
uint8_t yh = LEDhue/937; // ============= hue slider
// the above variable (16-bit, max 65535!) divided into 70 steps
//tft.fillRect(x,y,w,h,t)
tft.fillRect(xH-5,0,23,80, BLACK); // x-position set in definitions
tft.fillRect(xH-5,5+(70-yh),23,4,WHITE); // slider bar
tft.fillRect(xH+1,6+(70-yh),11,2,BLACK);
rainbowSlider(); // coloured vertical bar
uint8_t ys = LEDsat/4; // =============== saturation histogram
// 8-bit value divided into 64 steps
uint8_t ySV = 5;
//tft.drawRect(x,y,w,h,t)
tft.drawRect(xS-3,ySV,18,75, WHITE); // outline rectangle
//tft.fillRect(x,y,w,h,t)
tft.fillRect(xS,ySV+2,12,72,WHITE); // solid white
tft.fillRect(xS,ySV+2,12,64-ys,BLACK); // black curtain that
// changes with the variable
// this gives the impression that the white rectangle changes ;•)
tft.drawRect(xS-2,ySV+67,16,3,BLACK);
tft.drawRect(xS-2,ySV+71,16,3,BLACK);
uint8_t yv = LEDval/4; // ================ value histogram
// 8-bit value divided into 64 steps
//uint8_t xv = 102; //105
//tft.drawRect(x,y,w,h,t)
tft.drawRect(xV-1,ySV,18,75, WHITE); // outline rectangle
//tft.fillRect(x,y,w,h,t)
tft.fillRect(xV+2,ySV+2,12,72,WHITE);
tft.fillRect(xV+2,ySV+2,12,64-yv,BLACK); // black curtain that
// changes with the variable
tft.drawRect(xV,ySV+67,16,3,BLACK);
tft.drawRect(xV,ySV+71,16,3,BLACK);
}
encoderPosCheck = encoderPos; // this remembers the RotEnc position
}
// Interrupt on A changing state
void doEncoderA(){
// debounce
if ( rotating ) delay (1); // wait a little until the bouncing is done
// Test transition, did things really change?
if( digitalRead(encoderPinA) != A_set ) { // debounce once more
A_set = !A_set;
// adjust counter + if A leads B
if ( A_set && !B_set )
encoderPos += 1;
rotating = false; // no more debouncing until loop() hits again
}
}
// Interrupt on B changing state, same as A above
void doEncoderB(){
if ( rotating ) delay (1);
if( digitalRead(encoderPinB) != B_set ) {
B_set = !B_set;
// adjust counter – 1 if B leads A
if( B_set && !A_set )
encoderPos -= 1;
rotating = false;
}
}
void rainbow()
{
uint8_t x = xH+6;
uint8_t y = 100;
uint8_t r = 6;
tft.fillCircle(x,y,r+7,RED);
tft.fillCircle(x,y,r+4,CYAN);
tft.fillCircle(x,y,r+2,MAGENTA);
//tft.drawCircle(x,y,r,t)
tft.drawCircle(x,y,r,paleMAGENTA);
tft.drawCircle(x,y,r+2,BLUE);
tft.drawCircle(x,y,r+4,GREEN);
tft.drawCircle(x,y,r+5,YELLOW);
tft.drawCircle(x,y,r+6,RED);
tft.fillCircle(x,y,r-1,BLACK);
uint8_t w = 2*(r+7)+1;
uint8_t h = r+8;
uint8_t xr = x-(r+7);
//tft.fillRoundRect(x,y,w,h,r,t)
tft.fillRect(xr,y,w,h,BLACK);
}
void satIcon() // colour-block
{
//uint8_t x = xS+6; //64
uint8_t y = 88;
uint8_t w = 12;
uint8_t h = 3;
tft.fillRect(xS-6,y,w,h, RED);
tft.fillRect(xS-6,y+h,w,h, GREEN);
tft.fillRect(xS-6,y+(2*h),w,h, BLUE);
tft.fillRect(xS-6,y+(3*h),w,h, YELLOW);
tft.fillRect(xS-6+w,y,w,h, paleMAGENTA);
tft.fillRect(xS-6+w,y+h,w,h, paleGREEN);
tft.fillRect(xS-6+w,y+(2*h),w,h, paleBLUE);
tft.fillRect(xS-6+w,y+(3*h),w,h, paleYELLOW);
}
void valIcon() // brightness symbol
{
uint8_t x = xV+7; // 105
uint8_t y = 94; // centre of circle
uint8_t r = 3;
uint8_t h = 6*r;
uint8_t w = h;
//tft.drawFastVLine(x,y,h,t);
//tft.drawFastHLine(x,y,w,t);
tft.drawFastVLine(x,y-(h/2),h+1, WHITE);
tft.drawFastHLine(x-(h/2),y,w+1, WHITE);
//tft.drawLine(xi,yi,xj,yj,t);
tft.drawLine(x-(2*r),y+(2*r),x+(2*r),y-(2*r),WHITE);
tft.drawLine(x+(2*r),y+(2*r),x-(2*r),y-(2*r),WHITE);
//tft.fillCircle(x,y,r,t)
tft.fillCircle(x,y,r+2, BLACK);
tft.fillCircle(x,y,r, WHITE);
}
void rainbowSlider() // rainbow bar, FOR HUE SLIDER
{
//tft.drawFastVLine(x,y,h,t)
tft.drawFastVLine(xH+5,10,10, MAGENTA);
tft.drawFastVLine(xH+5,20,10, BLUE);
tft.drawFastVLine(xH+5,30,10, CYAN);
tft.drawFastVLine(xH+5,40,10, GREEN);
tft.drawFastVLine(xH+5,50,10, YELLOW);
tft.drawFastVLine(xH+5,60,10, ORANGE);
tft.drawFastVLine(xH+5,70,10, RED);
tft.drawFastVLine(xH+6,10,12, MAGENTA);
tft.drawFastVLine(xH+6,20,10, BLUE);
tft.drawFastVLine(xH+6,30,10, CYAN);
tft.drawFastVLine(xH+6,40,10, GREEN);
tft.drawFastVLine(xH+6,50,10, YELLOW);
tft.drawFastVLine(xH+6,60,10, ORANGE);
tft.drawFastVLine(xH+6,70,10, RED);
tft.drawFastVLine(xH+7,10,10, MAGENTA);
tft.drawFastVLine(xH+7,20,10, BLUE);
tft.drawFastVLine(xH+7,30,10, CYAN);
tft.drawFastVLine(xH+7,40,10, GREEN);
tft.drawFastVLine(xH+7,50,10, YELLOW);
tft.drawFastVLine(xH+7,60,10, ORANGE);
tft.drawFastVLine(xH+7,70,10, RED);
}