#include <Adafruit_GFX.h>
#include <Adafruit_ST7735.h>
#include <ezButton.h>  // the library to use for SW pin on encoder

#define CLK_PIN 34 // ESP32  connected to the rotary encoder's CLK pin
#define DT_PIN  35 // ESP32  connected to the rotary encoder's DT pin
#define SW_PIN  32 // ESP32  connected to the rotary encoder's SW pin

#define CLK_PIN2 4 // ESP32 2nd connected  rotary encoder's CLK pin
#define DT_PIN2  16 // ESP32 2nd connected  rotary encoder's DT pin
#define SW_PIN2  17 // ESP32 2nd connected  rotary encoder's SW pin


#define DIRECTION_CW  0         // clockwise direction rotary2
#define DIRECTION_CCW 1         // counter-clockwise direction rotary2

#define DIRECTION_CW2  0         // clockwise direction rotary2
#define DIRECTION_CCW2 1         // counter-clockwise direction rotary2



#define TFT_CS 5
#define TFT_RST 2
#define TFT_DC 0
//#define vfoa 0740.00000
//#define vfob 2400.00000
#define TFT_BL 22               // LED back-light

//int counter = 0;                //rotary
int vfoa = 0740.00000;
int direction = DIRECTION_CW;   //rotary
int CLK_state;                  //rotary
int prev_CLK_state;             //rotary

ezButton button(SW_PIN);  // create ezButton object that attach to pin ;

int vfob = 2400.00000;
int direction2 = DIRECTION_CW2;   //rotary2
int CLK_state2;                  //rotary2
int prev_CLK_state2;             //rotary2

//ezButton button(SW_PIN2);  // create ezButton object that attach to pin ;


Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);  // hardware SPI


void setup(void) {

  tft.initR(INITR_BLACKTAB);      // Init ST7735S chip, black tab

 // configure encoder pins as inputs
  pinMode(CLK_PIN, INPUT);
  pinMode(DT_PIN, INPUT);
  button.setDebounceTime(50);  // set debounce time to 50 milliseconds

  // read the initial state of the rotary encoder's CLK pin
  prev_CLK_state = digitalRead(CLK_PIN);

pinMode(CLK_PIN2, INPUT);
  pinMode(DT_PIN2, INPUT);
  button.setDebounceTime(50);  // set debounce time to 50 milliseconds

  // read the initial state of the rotary encoder's CLK pin
  prev_CLK_state2 = digitalRead(CLK_PIN);




pinMode(TFT_BL, OUTPUT);
digitalWrite(TFT_BL, HIGH);
  tft.setRotation(1);
  tft.fillScreen(ST77XX_BLACK);

  tft.setTextColor(ST77XX_GREEN);
  tft.setTextSize(2);
  tft.setCursor(0, 20);
  tft.println(vfoa);
  tft.println("mhz");
  tft.setTextColor(ST77XX_YELLOW);
  tft.setCursor(0, 60);
  tft.println(vfob);
 tft.println("mhz");
}

void loop() {
  button.loop();  // MUST call the loop() function first

  // read the current state of the rotary encoder's CLK pin
  CLK_state = digitalRead(CLK_PIN);

  // If the state of CLK is changed, then pulse occurred
  // React to only the rising edge (from LOW to HIGH) to avoid double count
  if (CLK_state != prev_CLK_state && CLK_state == HIGH) {
    // if the DT state is HIGH
    // the encoder is rotating in counter-clockwise direction => decrease the counter
    if (digitalRead(DT_PIN) == HIGH) {
      vfoa--;
      direction = DIRECTION_CCW;
    } else {

      vfoa++;
      direction = DIRECTION_CW;

button.loop();  // MUST call the loop() function first

  // read the current state of the rotary encoder's CLK pin
  CLK_state2 = digitalRead(CLK_PIN);

  // If the state of CLK is changed, then pulse occurred
  // React to only the rising edge (from LOW to HIGH) to avoid double count
  if (CLK_state2 != prev_CLK_state2 && CLK_state2 == HIGH) {
    // if the DT state is HIGH
    // the encoder is rotating in counter-clockwise direction => decrease the counter
    if (digitalRead(DT_PIN2) == HIGH) {
      vfob--;
      direction2 = DIRECTION_CCW2;
    } else {
      // the encoder is rotating in clockwise direction => increase the counter
      vfob++;
      direction = DIRECTION_CW2;

    }

    //to convert count to vfo and display
tft.fillScreen(ST77XX_BLACK);


  tft.setTextColor(ST77XX_YELLOW);
  tft.setCursor(0, 60);
  tft.println(vfob);
 tft.println("mhz");
    //Serial.print("Rotary Encoder:: direction: ");
    //if (direction == DIRECTION_CW)
     // Serial.print("Clockwise");
  //  else;
  tft.fillScreen(ST77XX_BLACK);
    tft.setTextColor(ST77XX_GREEN);
  tft.setTextSize(2);
  tft.setCursor(0, 20);
  tft.println(vfoa);
  tft.println("mhz");
     tft.setTextColor(ST77XX_YELLOW);
  tft.setCursor(0, 60);
  tft.println(vfob);
 tft.println("mhz");

     // Serial.print("Counter-clockwise");

   // Serial.print(" - count: ");
    //Serial.println(counter);
  }

  // save last CLK state
  prev_CLK_state = CLK_state;

  //if (button.isPressed()) {
   // Serial.println("The button is pressed");
  }
}}