//
// ESP32 NeoPixel 32x32 Panel Demo - this demo uses four 8x32 panels
// to create a single 32x32 maxtrix.
//

#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>

#define PIN 2

// Four panel matrix
Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(32, 8, 1, 4, PIN,
  NEO_MATRIX_TOP   + NEO_MATRIX_LEFT + NEO_MATRIX_ROWS + NEO_MATRIX_PROGRESSIVE +
  NEO_TILE_TOP     + NEO_TILE_LEFT   + NEO_TILE_ROWS   + NEO_TILE_PROGRESSIVE,
  NEO_GRB          + NEO_KHZ800);

// Other declarations

const int displayWidth = matrix.width();
const int displayHeight = matrix.height();

const uint16_t red     = matrix.Color(255, 0, 0);
const uint16_t green   = matrix.Color(0, 255, 0);
const uint16_t blue    = matrix.Color(0, 0, 255);
const uint16_t yellow  = matrix.Color(255, 255, 0);
const uint16_t magenta = matrix.Color(255, 0, 2550);
const uint16_t black   = matrix.Color(0, 0, 0);

//
// Setup function
//

void setup() {
  matrix.begin();
  matrix.setBrightness(255);

  Serial.begin(115200);
  Serial.print("The matrix panel is ");
  Serial.print(displayWidth);
  Serial.print(" pixels wide and ");
  Serial.print(displayHeight);
  Serial.println(" pixels high.");
}

//
// Loop function
//

void loop() {
  
  showIndividualPixels();
  delay(2000);

  showPixelsByRow();
  delay(2000);

  fillPanel(magenta);
  delay(2000);

  matrix.clear();
  matrix.show();
  delay(1000);
}


void fillPanel(uint16_t fillColor) {
  matrix.clear();
  matrix.fillScreen(fillColor);
  matrix.show();
}

void showIndividualPixels() {
  matrix.clear();
  // Set individual pixels in the pixel RAM to specific colors using row and column coordinates 
  matrix.drawPixel(0,0,matrix.Color(255,255,0));         // set to yellow
  matrix.drawPixel(0,7,matrix.Color(255,0,0));           // set to red
  matrix.drawPixel(0,31,matrix.Color(0,255,0));          // set to green 
  matrix.drawPixel(8,1,matrix.Color(0,0,255));           // set to blue
  matrix.drawPixel(15,31,matrix.Color(255,166,0));       // set to orange
  matrix.drawPixel(16,10,matrix.Color(0,255,255));       // set to aqua
  matrix.drawPixel(31,29,matrix.Color(255,0,255));       // set to magenta  
  matrix.show();
}

void showPixelsByRow() {
  for (int y=0; y<=31; y++) {
    Serial.print("Showing row ");
    Serial.print(y);
    Serial.println(" ...");
    for (int x=0; x<=31; x++) {
      matrix.drawPixel(x,y,matrix.Color(255,255,0)); 
      matrix.show();
      delay(5);
    } 
  }
}