dac-usb-bluetooth/control-panel-for-for-dac/control-panel-for-for-dac.ino

// по материалам: 
//https://www.instructables.com/Simple-LCD-MENU-Using-Arduino/
// https://alexgyver.ru/lessons/
// https://www.hackster.io/mircemk/diy-arduino-vfd-display-20x2-vu-volume-unit-meter-37898f

#define GAIN 5 // усиление 0...50
#define STEP 20  // плавность полос 0...20
#define RL 1    // RL - горизонт, вертикаль 0...1
// Выходы для управления реле (вкл.вкл  ЦАП/Блютуз)
#define RELAY_POWER_USB 7
#define RELAY_POWER_BT 6
#define RELAY_POWER_MP3 10
#define RELAY_OUT_BT_LEFT 8
#define RELAY_OUT_BT_RIGHT 9
#define RELAY_OUT_MP3_LEFT 11
#define RELAY_OUT_MP3_RIGHT 12

// Кнопки
#define BTN_MENU 2       // Кнопка меню
#define BTN_EXECUTE 3       // Кнопка подтверждения
#define INIT_ADDR 1023  // номер резервной ячейки
#define INIT_KEY 1     // ключ первого запуска

//#include <LiquidCrystal.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <EEPROM.h>

//  LiquidCrystal lcdVuMeter(2, 3, 4, 5, 6, 7);// RS,E,D4,D5,D6,D7
LiquidCrystal_I2C lcdVuMeter(0x27, 16, 2);
LiquidCrystal_I2C lcdService(0x26, 16, 2);

byte z,z0,z1,w,www=1;
int ur,ul,urr,ull,urrr,ulll;
int x,i,u_maxr,u_maxl;
int u_l0[20],u_r0[20];
bool usb, bluetooth, mp3;
int menu = 1;
bool menuShow = false;

void setup() {
  pinMode(8,INPUT_PULLUP);
  byte znak_r[8]={0b00000,0b00000,0b11111,0b00101,0b00101,0b11010,0b00000,0b00000};
  byte znak_l[8]={0b00000,0b00000,0b11111,0b10000,0b10000,0b10000,0b00000,0b00000};
  lcdVuMeter.init();
  lcdVuMeter.backlight();
  lcdVuMeter.clear();
  lcdVuMeter.setCursor(0, 0);
  lcdVuMeter.print("R");
//  lcdVuMeter.createChar(4,znak_r);
  lcdVuMeter.setCursor(0, 1); 
  lcdVuMeter.print("L");
  lcdService.init();
  lcdService.backlight();
  lcdService.clear();
 // lcdService.setCursor(0, 0);
//  lcdService.print("Menu");

// Кнопка управления (переключения)
  pinMode(BTN_MENU, INPUT_PULLUP);
  pinMode(BTN_EXECUTE, INPUT_PULLUP);
// Выходы для управления реле (вкл.вкл  ЦАП/Блютуз)
  pinMode(RELAY_POWER_USB, OUTPUT);
  pinMode(RELAY_POWER_BT, OUTPUT);
  pinMode(RELAY_POWER_MP3, OUTPUT);
  pinMode(RELAY_OUT_BT_LEFT, OUTPUT);
  pinMode(RELAY_OUT_BT_RIGHT, OUTPUT);
  pinMode(RELAY_OUT_MP3_LEFT, OUTPUT);
  pinMode(RELAY_OUT_MP3_RIGHT, OUTPUT);
  
  //  lcdVuMeter.createChar(5,znak_l);
  //  lcdVuMeter.begin(16, 2);// lcdVuMeter 16X2
 // analogReference(INTERNAL);  // если очень маленький уровень сигнала
  pinMode(A0,INPUT);// A0 - аналоговый вход R
  pinMode(A1,INPUT);// A1 - аналоговый вход L

  // первый запуск и установка занчений переменных в память
  if (EEPROM.read(INIT_ADDR) != INIT_KEY) {
    EEPROM.write(INIT_ADDR, INIT_KEY);
    usb = true;
    bluetooth = false;
    mp3 = false;
    
    EEPROM.put(10, usb);
    EEPROM.put(12, bluetooth);
    EEPROM.put(14, mp3);
  } else {
    usb = EEPROM.read(10);
    bluetooth = EEPROM.read(12);
    mp3 = EEPROM.read(14);  
  }
  
  w = EEPROM.read(0);
  if (usb) {
    digitalWrite(RELAY_POWER_BT,HIGH);
    digitalWrite(RELAY_POWER_MP3,HIGH);
    digitalWrite(RELAY_POWER_USB,HIGH);
    delay(500);
    digitalWrite(RELAY_OUT_BT_LEFT,HIGH);
    digitalWrite(RELAY_OUT_BT_RIGHT,HIGH);
    digitalWrite(RELAY_OUT_MP3_LEFT,HIGH);
    digitalWrite(RELAY_OUT_MP3_RIGHT,HIGH);
  }

  if (bluetooth) {
    digitalWrite(RELAY_POWER_USB,HIGH);
    digitalWrite(RELAY_POWER_MP3,HIGH);
    delay(500);
    digitalWrite(RELAY_OUT_MP3_LEFT,HIGH);
    digitalWrite(RELAY_OUT_MP3_RIGHT,HIGH);
    delay(1000);
    digitalWrite(RELAY_OUT_BT_LEFT,LOW);
    digitalWrite(RELAY_OUT_BT_RIGHT,LOW);
    digitalWrite(RELAY_POWER_BT,LOW);
  }
  if (mp3) {
     }
  updateMenu();
}
 
void vu_metter() {

//  if(digitalRead(8)==LOW){w++;www=1;if(w>4){w=0;}delay(200);EEPROM.update(0,w);}
 
  if(w==0&&www==1){www=0;
  byte a1[8] = {0b10101,0b10101,0b10101,0b10101,0b10101,0b10101,0b10101,0b10101};
  byte a2[8] = {0b10100,0b10100,0b10100,0b10100,0b10100,0b10100,0b10100,0b10100};
  byte a3[8] = {0b10000,0b10000,0b10000,0b10000,0b10000,0b10000,0b10000,0b10000};
  byte a4[8] = {0b00011,0b00011,0b00011,0b0011,0b0011,0b0011,0b0011,0b0011};// 
  lcdVuMeter.createChar(0,a1);lcdVuMeter.createChar(1,a2);lcdVuMeter.createChar(2,a3);lcdVuMeter.createChar(6,a4);} 
  if(w==1&&www==1){www=0;
  byte a1[8] = {0b00000,0b10101,0b10101,0b10101,0b10101,0b10101,0b10101,0b00000};
  byte a2[8] = {0b00000,0b10100,0b10100,0b10100,0b10100,0b10100,0b10100,0b00000};
  byte a3[8] = {0b00000,0b10000,0b10000,0b10000,0b10000,0b10000,0b10000,0b00000};
  byte a4[8] = {0b00000,0b0011,0b0011,0b0011,0b0011,0b0011,0b0011,0b00000};//  
  lcdVuMeter.createChar(0,a1);lcdVuMeter.createChar(1,a2);lcdVuMeter.createChar(2,a3);lcdVuMeter.createChar(6,a4);} 
  if(w==2&&www==1){www=0;
  byte a1[8] = {0b10101,0b10101,0b10101,0b00000,0b00000,0b10101,0b10101,0b10101};
  byte a2[8] = {0b10100,0b10100,0b10100,0b00000,0b00000,0b10100,0b10100,0b10100};
  byte a3[8] = {0b10000,0b10000,0b10000,0b00000,0b00000,0b10000,0b10000,0b10000};
  byte a4[8] = {0b0011,0b0011,0b0011,0b0011,0b0011,0b0011,0b0011,0b0011}; 
  lcdVuMeter.createChar(0,a1);lcdVuMeter.createChar(1,a2);lcdVuMeter.createChar(2,a3);lcdVuMeter.createChar(6,a4);} 
  if(w==3&&www==1){www=0;
  byte a1[8] = {0b00000,0b10101,0b10101,0b00000,0b00000,0b10101,0b10101,0b00000};
  byte a2[8] = {0b00000,0b10100,0b10100,0b00000,0b00000,0b10100,0b10100,0b00000};
  byte a3[8] = {0b00000,0b10000,0b10000,0b00000,0b00000,0b10000,0b10000,0b00000};
  byte a4[8] = {0b00000,0b0011,0b0011,0b0011,0b0011,0b0011,0b0011,0b00000};
  lcdVuMeter.createChar(0,a1);lcdVuMeter.createChar(1,a2);lcdVuMeter.createChar(2,a3);lcdVuMeter.createChar(6,a4);} 
  if(w==4&&www==1){www=0;
  byte a1[8] = {0b00000,0b00000,0b10101,0b10101,0b10101,0b10101,0b00000,0b00000};
  byte a2[8] = {0b00000,0b00000,0b10100,0b10100,0b10100,0b10100,0b00000,0b00000};
  byte a3[8] = {0b00000,0b00000,0b10000,0b10000,0b10000,0b10000,0b00000,0b00000};
  byte a4[8] = {0b00000,0b00000,0b0011,0b0011,0b0011,0b0011,0b00000,0b00000};
  lcdVuMeter.createChar(0,a1);lcdVuMeter.createChar(1,a2);lcdVuMeter.createChar(2,a3);lcdVuMeter.createChar(6,a4);} 
 
  urr = log(analogRead(0))*GAIN;if(urr>41){urr=41;}
  ull = log(analogRead(1))*GAIN;if(ull>41){ull=41;}
 
  if(RL==0){lcdVuMeter.setCursor(0,0);lcdVuMeter.write((uint8_t)4);lcdVuMeter.setCursor(0,1);lcdVuMeter.write((uint8_t)5);}
  if(RL==1){lcdVuMeter.setCursor(0,1);lcdVuMeter.print("L");lcdVuMeter.setCursor(0,0);lcdVuMeter.print("R");}
 
   if(urr<ur){ur=ur-1;delay(STEP);}else{ur = urr;}
  for(z=0,z0=0,z1=0;z<=ur;z++,z1++){if(z1>2){z1=0;z0++;}
   if(z1==1){lcdVuMeter.setCursor(z0+1,1);lcdVuMeter.write((uint8_t)0);lcdVuMeter.setCursor(z0+2,1);if(ur<39){lcdVuMeter.print(" ");}}}
   if(z1==3){lcdVuMeter.setCursor(z0+1,1);lcdVuMeter.write((uint8_t)1);}
   if(z1==2){lcdVuMeter.setCursor(z0+1,1);lcdVuMeter.write((uint8_t)2);}
 
   if(ull<ul){ul=ul-1;delay(STEP);}else{ul = ull;}
  for(z=0,z0=0,z1=0;z<=ul;z++,z1++){if(z1>2){z1=0;z0++;}
   if(z1==1){lcdVuMeter.setCursor(z0+1,0);lcdVuMeter.write((uint8_t)0);lcdVuMeter.setCursor(z0+2,0);if(ul<39){lcdVuMeter.print(" ");}}}
   if(z1==3){lcdVuMeter.setCursor(z0+1,0);lcdVuMeter.write((uint8_t)1);}
   if(z1==2){lcdVuMeter.setCursor(z0+1,0);lcdVuMeter.write((uint8_t)2);}
 
//////////////////////////////////////////////////////////
 
i++;if(i<19){u_l0[i]=abs(ull);u_r0[i]=abs(urr);}else{i=1;}
  if(i==18){u_maxr=0;u_maxl=0;
    for(x=1;x<=15;x++){
      u_maxl=max(u_maxl,u_l0[x]);
      u_maxr=max(u_maxr,u_r0[x]);}}
 
  if(u_maxl<=ull){u_maxl=ull+1;} 
  if(u_maxr<=urr){u_maxr=urr+1;}
 
  if(u_maxl<ulll){ulll=ulll-1;delay(STEP);}else{ulll = u_maxl;}
  if(u_maxr<urrr){urrr=urrr-1;delay(STEP);}else{urrr = u_maxr;}
 
 
  lcdVuMeter.setCursor(ulll/3+1,0);if(ulll/3>2){lcdVuMeter.write((uint8_t)6);}lcdVuMeter.print("  ");
  lcdVuMeter.setCursor(urrr/3+1,1);if(urrr/3>2){lcdVuMeter.write((uint8_t)6);}lcdVuMeter.print("  "); 
  delay(3);
}

String setUSBinput() {
  return "Input: USB";
}


void updateMenu() {
  switch (menu) {
    case 0:
      menu = 1;
      break;
    case 1:
      lcdService.clear();
      lcdService.print(">USB DAC");
      lcdService.setCursor(2, 1);
      if(usb){
        lcdService.print("On");
      }else{
        lcdService.print("Off");
      }
      break;
    case 2:
      lcdService.clear();
      lcdService.print(">Bluetooth");
      lcdService.setCursor(2, 1);
      if(bluetooth){
        lcdService.print("On");
      }else{
        lcdService.print("Off");
      }
      break;
    case 3:
      lcdService.clear();
      lcdService.print(">MP3 module");
      lcdService.setCursor(2, 1);
      if(mp3){
        lcdService.print("On");
      }else{
        lcdService.print("Off");
      }
      break;
    case 4:
      menu = 0;
      menuShow = false;
      lcdService.clear();
      break;
  }
}

void executeMenuAction() {
  switch (menu) {
    case 1:
      actionUSB();
      break;
    case 2:
      actionBT();
      break;
    case 3:
      actionMP3();
      break;
  }
  EEPROM.put(10, usb);
  EEPROM.put(12, bluetooth);
  EEPROM.put(14, mp3);
}

void actionUSB() {
//  lcdService.clear();
  lcdService.setCursor(2,1);
  lcdService.print("On ");
  digitalWrite(RELAY_POWER_BT,HIGH);
  digitalWrite(RELAY_POWER_MP3,HIGH);
  digitalWrite(RELAY_POWER_USB,HIGH);
  delay(500);
  digitalWrite(RELAY_OUT_BT_LEFT,HIGH);
  digitalWrite(RELAY_OUT_BT_RIGHT,HIGH);
  digitalWrite(RELAY_OUT_MP3_LEFT,HIGH);
  digitalWrite(RELAY_OUT_MP3_RIGHT,HIGH);
  usb = true;
  bluetooth = false;
  mp3 = false;

//  delay(1500);
}

void actionBT() {
//  lcdService.clear();
  lcdService.setCursor(2,1);
  lcdService.print("On ");
  digitalWrite(RELAY_POWER_USB,HIGH);
  digitalWrite(RELAY_POWER_MP3,HIGH);
  delay(500);
  digitalWrite(RELAY_OUT_MP3_LEFT,HIGH);
  digitalWrite(RELAY_OUT_MP3_RIGHT,HIGH);
  delay(1000);
  digitalWrite(RELAY_OUT_BT_LEFT,LOW);
  digitalWrite(RELAY_OUT_BT_RIGHT,LOW);
  digitalWrite(RELAY_POWER_BT,LOW);
  usb = false;
  bluetooth = true;
  mp3 = false;

//  delay(1500);
}

void actionMP3() {
//  lcdService.clear();
  lcdService.setCursor(2,1);
  lcdService.print("On ");
  digitalWrite(RELAY_POWER_USB,HIGH);
  digitalWrite(RELAY_POWER_BT,HIGH);
  delay(500);
  digitalWrite(RELAY_OUT_BT_LEFT,HIGH);
  digitalWrite(RELAY_OUT_BT_RIGHT,HIGH);
  delay(1000);
  digitalWrite(RELAY_OUT_MP3_LEFT,LOW);  
  digitalWrite(RELAY_OUT_MP3_RIGHT,LOW);
  digitalWrite(RELAY_POWER_MP3,LOW);
  usb = false;
  bluetooth = false;
  mp3 = true;
  delay(1500);
}

uint32_t btnTimer = 0;

void loop() {
  lcdService.setCursor(0,0);
  // Выводим на экран информацию какой модуль включен

  if(!menuShow){
    if(usb){
      lcdService.print("USB DAC");
      lcdService.setCursor(0,1);
      lcdService.print(setUSBinput());
//      actionUSB();
    }
    if(bluetooth){
      lcdService.print("Bluetooth");
//      actionBT();
    }
    if(mp3){
      lcdService.print("MP3 module");
//      actionMP3();
    }
  }
//  bool btnMenuState = digitalRead(BTN_MENU);
//  bool btnExecuteState = digitalRead(BTN_EXECUTE);

  if (!digitalRead(BTN_MENU)){
    menuShow = true;
    menu ++;
    updateMenu();
    delay(100);
    while (!digitalRead(BTN_MENU));
  }
  if (!digitalRead(BTN_EXECUTE)){
    executeMenuAction();
    updateMenu();
    delay(100);
    while (!digitalRead(BTN_EXECUTE));
  }
// Тут будет код обработки данных от USB DAC для индикации режима его работы
//  if (digitalRead(8) && usb) {
//    lcdService.setCursor(0,1);
//    lcdService.print("Coaxial");
//  } else if (digitalRead(9) && usb) {
//    lcdService.setCursor(0,1);
//    lcdService.print("Optical");
//  } else if (digitalRead(10) && usb) {
//    lcdService.setCursor(0,1);
//    lcdService.print("Audio  ");
//  } else {
//    lcdService.setCursor(0,1);
//    lcdService.print("       ");
//  }
//  lcdService.setCursor(11,1);
//  lcdService.print(digitalRead(8), digitalRead(9));

  vu_metter();
}