#include <Adafruit_NeoPixel.h>

// Which pin on the Arduino is connected to the NeoPixels?
#define PIN        5 // On Trinket or Gemma, suggest changing this to 1

// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS 16 // Popular NeoPixel ring size

// When setting up the NeoPixel library, we tell it how many pixels,
// and which pin to use to send signals. Note that for older NeoPixel
// strips you might need to change the third parameter -- see the
// strandtest example for more information on possible values.
Adafruit_NeoPixel strip(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

#define M_ENA   13
#define M_DIR   12
#define M_STEP  14

int dir = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  strip.begin();
  strip.clear();
  strip.show();

  pinMode(M_ENA,OUTPUT);
  pinMode(M_DIR,OUTPUT);
  pinMode(M_STEP,OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
  // The first NeoPixel in a strand is #0, second is 1, all the way up
  // to the count of pixels minus one.
  // for(int i=0; i<NUMPIXELS; i++) { // For each pixel...

  //   // pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
  //   // Here we're using a moderately bright green color:
  //   pixels.setPixelColor(i, pixels.Color(0, 150, 0));

  //   pixels.show();   // Send the updated pixel colors to the hardware.

  //   delay(500); // Pause before next pass through loop
  // }

  Serial.println("Hello, ESP32!");
  rainbowCycle(10);
}



// 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);
}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;
  dir = !dir;
  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);
    mstep(dir);
  }
}



void mstep(int dir) {
  digitalWrite(M_ENA,LOW);
  digitalWrite(M_DIR,dir==1? HIGH:LOW);
  digitalWrite(M_STEP,HIGH);
  digitalWrite(M_STEP,LOW);
}