#include <SPI.h>
#include <EEPROM.h>
#include <MsTimer2.h>                    // http://rcl-radio.ru/wp-content/uploads/2018/11/MsTimer2.zip
#include <Encoder.h>                     // http://rcl-radio.ru/wp-content/uploads/2019/05/Encoder.zip
#include <STM32_TM1637.h>                // http://rcl-radio.ru/wp-content/uploads/2020/02/STM32_TM1637_V1_3.zip
 Encoder myEnc(8, 9);//CLK, DT
 STM32_TM1637 tm(3,2);// CLK, DIO

//  AD1852 SPI
// SS    10 // CLATCH
// MOSI  11 // CDATA
// SCK   13 // CCLK

unsigned long times,oldPosition  = -999,newPosition;
int w,vol,mute,code_mute,in;

void setup(){
 Serial.begin(9600);tm.brig(7); // ЯРКОСТЬ 0...7
 MsTimer2::set(1, to_Timer);MsTimer2::start();
 pinMode(A0,OUTPUT);  // RSEL1 CS8416
 pinMode(A1,OUTPUT);  // RSEL0 CS8416
 pinMode(7,INPUT); // кнопка SW энкодера
 pinMode(6,INPUT_PULLUP); // кнопка IN
 vol = EEPROM.read(0);in = EEPROM.read(1);
 switch(in){
 case 0: digitalWrite(A0, LOW);digitalWrite(A1, LOW);tm.print_float(1,0 ,0b00000100,0b01010100,0,0);break;// px0 
 case 1: digitalWrite(A0, LOW);digitalWrite(A1, HIGH);tm.print_float(2,0 ,0b00000100,0b01010100,0,0);break;// px1
 case 2: digitalWrite(A0, HIGH);digitalWrite(A1, LOW);tm.print_float(3,0 ,0b00000100,0b01010100,0,0);break;// px2
 }
 }// setup

void loop(){
   if(digitalRead(7)==LOW&&mute==0){mute=1;code_mute = 0b1000000;tm.print_float(vol,0 ,0b01000000,0b01000000,0b01000000,0b01000000);delay(200);}
   if(digitalRead(7)==LOW&&mute==1){mute=0;code_mute = 0;tm.print_float(vol,0 ,0,0,0,0);delay(200);}

   if(digitalRead(6)==LOW){in++;if(in>2){in=0;}times=millis();w=1;
 switch(in){
 case 0: digitalWrite(A0, LOW);digitalWrite(A1, LOW);tm.print_float(1,0 ,0b00000100,0b01010100,0,0);break;// px0 
 case 1: digitalWrite(A0, LOW);digitalWrite(A1, HIGH);tm.print_float(2,0 ,0b00000100,0b01010100,0,0);break;// px1
 case 2: digitalWrite(A0, HIGH);digitalWrite(A1, LOW);tm.print_float(3,0 ,0b00000100,0b01010100,0,0);break;// px2
 }
 delay(2000);tm.print_float(vol,0 ,0,0,0,0);}

   if (newPosition != oldPosition){oldPosition = newPosition;
     vol=vol+newPosition;myEnc.write(0);newPosition=0;w=1;times=millis();
     if(vol>127){vol=127;}if(vol<0){vol=0;}
     Serial.println(vol);
     if(mute==0){tm.print_float(vol,0 ,0,0,0,0);}
     mute=0;code_mute = 0;
     }
  
   SPI.begin();
   WriteAD1852(0b100010010001+code_mute);  // register control 
   WriteAD1852(0b00+(vol<<9)); // register volume left
   WriteAD1852(0b10+(vol<<9)); // register volume right 
   delay(10);

   if(millis()-times>5000 && w==1){w=0;EEPROM.write(0,vol);EEPROM.write(1,in);}
  }// loop

 void WriteAD1852(uint16_t Data){
  SPI.beginTransaction(SPISettings(SPI_CLOCK_DIV2, MSBFIRST, SPI_MODE3));
  digitalWrite(SS, HIGH);
  delayMicroseconds(1);
  SPI.transfer16(Data);
  digitalWrite(SS, LOW);
  SPI.endTransaction();
}  

void to_Timer(){newPosition = myEnc.read()/4;}