#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#include <AD9833.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);  // set the LCD address to 0x27 for a 16 chars and 2 line display1$0330

//AD9833 AD(10, 11, 13);  //  SW SPI over the HW SPI pins (UNO);
//  AD(10);
//  HW SPI


//-------------------------------------------------------

#define btn_1 0     //UP 1
#define btn_2 1     //DOWN
#define btn_3 2     //
#define btn_4 3     //SELECT 4
#define btn_5 4     //SELECT 4
#define btn_NONE 5  //NONE 5
#define ERRORR 6
int SEL_F1 = 4;
int F1[6] = { 700, 1000, 1500, 2000, 3000 };
int SEL_F2 = 2;
int F2[6] = { 700, 1000, 1500, 2000, 3000 };
int SEL_LV = 0;
int SEL_MODE = 2;
int MODE[3];
unsigned mode_m[20] = { "SINE", "2TON", "KEY" };
int SEL_OUT = 0;
int sel_F1;
int sel_F2;

int osc1_setfreq;
/*
  ロータリーエンコーダ実験01
*/

int val;
int encoder0PinA = 2;
int encoder0PinB = 3;
int encoder0Pos = 0;
int encoder0PinALast = LOW;
int n = LOW;

void osc1(int osc1_setfreq) {
  AD9833 AD(10);  //  HW SPI, select pin 10
  SPI.begin();
  AD.begin();
  AD.setFrequency(osc1_setfreq, 0);  //  1000 Hz.
}

/*
  /**************************************************************/
/*関数名：read_LCD_buttons*/
/*動作；A0ポートの電圧値から押されたボタンを判別*/
/**************************************************************/
int read_LCD_buttons(int adc_key_in) {
  if (adc_key_in > 1000) return btn_NONE;  //1023, 戻り値5, 5.00V
  if (adc_key_in < 250) return btn_1;
  if (adc_key_in < 350) return btn_2;  //144 , 戻り値1, 0.70V
  if (adc_key_in < 650) return btn_3;  //329 , 戻り値2, 1.61V
  if (adc_key_in < 750) return btn_4;  //504 , 戻り値3, 2.47V
  if (adc_key_in < 850) return btn_5;  //641 , 戻り値4, 3.62V

  /* 全てのifが失敗（通常はこを返さない）*/
  return ERRORR;
}

/**************************************************************/
/*関数名：out_analog_volt*/
/*動作；A0ピンの電圧値を表示*/
/**************************************************************/
void out_analog_volt(int adc_key_in) {
  lcd.setCursor(10, 2);
  lcd.print((float)adc_key_in);
  lcd.setCursor(15, 2);
  lcd.print((float)adc_key_in * (5 / 1024));
}

/**************************************************************/
/*関数名：out_analog_state*/
/*動作；押されたボタンをLCDに表示*/
/**************************************************************/
void out_analog_state(int lcd_key) {
  lcd.setCursor(1, 2);
  switch (lcd_key) {
    case btn_1:
      {
        lcd.print("bt1    ");
        sel_F1++;
        if (sel_F1 > 5) {
          sel_F1 = 0;
        }
        F1[1] = F1[sel_F1];
        Serial.print("F1[");
        Serial.print(F1[sel_F1]);
        //     osc1(F2[sel_F1]);
        AD9833 AD(10);  //  HW SPI, select pin 10
        SPI.begin();
        AD.begin();
        AD.setFrequency(F1[sel_F1], 0);  //  1000 Hz.
        delay(200);
        break;
      }
    case btn_2:  //LEFT:
      {
        lcd.print("bt2     ");
        sel_F2++;
        if (sel_F2 > 5) {
          sel_F2 = 0;
        }
        F2[2] = F2[sel_F2];
        Serial.print("F2= ");
        Serial.print(F2[sel_F2]);

        AD9833 AD(10);  //  HW SPI, select pin 10
        SPI.begin();
        AD.begin();
        AD.setFrequency(F2[sel_F2], 0);

        delay(300);
        break;
      }
    case btn_3:
      {
        lcd.print("bt3    ");
        SEL_MODE++;
        if (SEL_MODE > 5) {
          SEL_MODE = 0;
        }
        //MODE[1] = MODE[SEL_MODE];
        Serial.print(MODE[SEL_MODE]);

        AD9833 AD(10);  //  HW SPI, select pin 10
        SPI.begin();
        AD.begin();
        AD.setWave(AD9833_SINE);
        Serial.print(AD.getWave());

        delay(300);
        break;
      }
    case btn_4:  //DOWN:
      {
        lcd.print("bt4  ");
        sel_F2++;
        if (sel_F2 > 5) {
          sel_F2 = 0;
        }
        F2[1] = F2[sel_F2];
        Serial.print(F2[sel_F2]);

        delay(300);
        break;
      }
    case btn_5:  //SELECT:
      {
        lcd.print("bt5");


        break;
      }
    case btn_NONE:
      {
        lcd.print("    ");
        break;
      }
    case ERRORR:
      {
        lcd.print("ERROR ");
        break;
      }
  }
}




void setup() {

  lcd.init();  // initialize the lcd
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("ORT-61F TEST SET     ");
  lcd.print("VER 0.0");
  delay(1000);

  //  lcd.init();
  // Print a message to the LCD.

  lcd.setCursor(0, 0);
  lcd.print("F1:          ");
  lcd.setCursor(0, 1);
  lcd.print("LV:MUTE   ");
  lcd.setCursor(0, 2);
  lcd.print("MODE:SINE  ");
  lcd.setCursor(0, 3);
  lcd.print("--  F1  --- MOD  DW  ");
  //
  //*+++++++++++++++++++++++++++++++++++++
  Serial.begin(115200);
  AD9833 AD(10);  //  HW SPI, select pin 10
  SPI.begin();
  AD.begin();
  AD.setWave(AD9833_OFF);
  AD.setFrequency(3000, 0);  //
  Serial.print(AD.setFrequency(3000, 0));
  AD.setWave(AD9833_SINE);
  Serial.print(AD.getWave());
  delay(1000);
  AD.setWave(AD9833_OFF);
}



void loop() {
  n = digitalRead(encoder0PinA);
  if ((encoder0PinALast == LOW) && (n == HIGH)) {
    if (digitalRead(encoder0PinB) == LOW) {
      encoder0Pos--;
      delay(abs(encoder0Pos));
    } else {
      encoder0Pos++;
      delay(abs(encoder0Pos));
    }
    Serial.print(encoder0Pos);
    Serial.print("/");
    //
    int lcd_key = 0;

    lcd_key = read_LCD_buttons(analogRead(2));
    // out_analog_state(lcd_key);

    //out_analog_volt(analogRead(2));
    //
  }
  encoder0PinALast = n;
  int lcd_key = 0;

  lcd_key = read_LCD_buttons(analogRead(2));
  lcd.setCursor(0, 0);
  lcd.print("F1:       ");
  lcd.setCursor(3, 0);
  lcd.print(F1[sel_F1]);
  lcd.print("Hz ");

  lcd.setCursor(10, 0);
  lcd.print("F2:        ");
  lcd.setCursor(13, 0);
  lcd.print(F2[sel_F2]);
  lcd.print("Hz ");

  out_analog_state(lcd_key);
  // out_analog_volt(lcd_key);
  // AD.setFrequency(1500, 0);  //  1000 Hz.
}