ADC CS5524 mit Atmega328

// Version 8, 09.04.2023

#include <LiquidCrystal_I2C.h>

#include<SPI.h>

#include <stdio.h>

#define MOSI 11

#define MISO  12

#define SPICLOCK  13

#define CS 4 //CS

byte clr;

byte clr1;

LiquidCrystal_I2C lcd(0x27, 20, 4);    //Zuweisen Adresse (0x27); 20 (Stellen); 4 (Zeilen)

byte counterStart = 131;  // alternative: 6

unsigned int scaleFactor = 250; // alternative: 1000

//char spi_transfer(volatile char data)

unsigned char  spi_transfer(char  data)

{

  SPDR = data;                    // Start the transmission

  while (!(SPSR & (1<<SPIF)))     // Wait the end of the transmission

  {

  };

  clr = SPSR;

  clr = SPIF;

  return SPDR;                    // return the received byte

}

void CS5524_init()

{

  lcd.setCursor(0, 2);                // setze Kursor in zweite Zeile

  //lcd.print("                    ");      // dritte Zeile

    lcd.print("             posinit");      // dritte Zeile

  delay(1000);

  byte data = 0b11111111;

  PORTD &= ~(1 << PD4); //CS5524 Chip-select auf low

  for(int i = 1; i <= 15; i++)

  {

    spi_transfer(data);

  }

  data = 0b11111110;

  spi_transfer(0xFE);

  data = 0b00000011;

  spi_transfer(0x03); 

  data = 0b00100000;

  spi_transfer(0x20);  

  data = 0b00000000;

  for(int i = 1; i <= 3; i++)

  {

    spi_transfer(data);

  }

  delay(10);

  data = 0b00000011;

  spi_transfer(data); 

  data = 0b00000000;

  for(int i = 1; i <= 4; i++)

  {

    spi_transfer(data);

  }

  PORTD |= (1 << PD4);  //CS5524 Chip-select auf high

  delay(500);

    lcd.setCursor(0, 2);                // setze Kursor in zweite Zeile

  //lcd.print("                    ");      // dritte Zeile

    lcd.print("          posinitaus");      // dritte Zeile

  delay(2000);

}

unsigned char  ADC_Werte0 = 'a';  //MSB

unsigned char  ADC_Werte1 = 'a';

unsigned char  ADC_Werte2 = 'a';  //LSB

unsigned char  ADC_Werte3 = 'a';  //Infos

void CS5524_read(char Kannal) //(char Kannal)

{

  //lcd.setCursor(0, 3); 

  //lcd.print(" Autobus2           ");

  delay(10);

  //char ADC_Werte[4];

  PORTD &= ~(1 << PD4); //CS5524 Chip-select auf low

  byte data = 0b10000000; //select Kannal 1, Temperatur

  spi_transfer(data);

  delay(500);

  data = 0b00000000; //SDO flag loeschen

  //spi_transfer(data);

  //ADC-Werte einlesen

  ADC_Werte0 = spi_transfer(data);  //MSB

  ADC_Werte1 = spi_transfer(data);

  ADC_Werte2 = spi_transfer(data);  //LSB

  ADC_Werte3 = spi_transfer(data);  //Infos

  PORTD |= (1 << PD4);  //CS5524 Chip-select auf high

  //lcd.setCursor(0, 3);   

  //lcd.print(" Autobus3           ");

  delay(10);

  lcd.setCursor(0, 0);             

  lcd.print(ADC_Werte0); 

  lcd.setCursor(0, 1);             

  lcd.print(ADC_Werte1); 

  lcd.setCursor(0, 2);             

  lcd.print(ADC_Werte2);   

  lcd.setCursor(0, 3);             

  lcd.print(ADC_Werte3);   

}

void setup()

{ 

  // Watchdog Anfang

  TCCR2A = 0x00; // OC2A and OC2B disconnected; Wave Form Generation Mode 0: Normal Mode

  TCCR2B = (1<<CS22) + (1<<CS21); // prescaler = 256

  // TCCR2B = (1<<CS22); // prescaler = 64; 

  TIMSK2 = (1<<TOIE2); // interrupt when TCNT2 is overflowed

  TCNT2 = counterStart;

  DDRD |= (1<<PD7);

  // Watchdog Ende

  Serial.begin(9600);

  DDRD |= (1 << PD4); // CS5524 Chip-select

  DDRB |= (1 << PB3) | (1 << PB5); // MOSI, MISO, SCK

  delay(10);

  PORTD |= (1 << PD4);  //CS5524 Chip-select auf high

  // SPCR = 01010000

  //interrupt disabled,spi enabled,msb 1st,controller,clk low when idle,

  //sample on leading edge of clk,system clock/8 rate (fastest)

  delay(100);

  SPI.begin();

   //SPCR |= (1 << SPE)|(1 << MSTR)|(1 << SPR1) | (1 << SPR0);

  //bitSet(SPCR, 4);  // MSTR Bit

  //bitSet(SPCR, 7);

  SPI.setBitOrder(MSBFIRST);  //bit transmission order

  SPI.setDataMode(SPI_MODE2); // Mode2

  SPI.setClockDivider(SPI_CLOCK_DIV16);  

  bitClear(SPCR, 7);   //local SPI interrupt is disable

  //bitSet(SPCR, 7);

  //clr = SPSR;

  //clr = SPDR;

/*

  SPCR |= (1 << MSTR);

  SPCR |= (1 << CPOL) | (1 << CPHA);

  SPCR &= ~(1 << DORD);

  SPSR &= ~(1 << SPI2X);

  SPCR |= (1 << SPR0) | (1 << SPR1);

  SPCR |= (1 << SPE);

*/  

  //sei();

  delay(100);

  //CS5524_init();

  //clr = SPSR;

  //clr1 = SPDR;

  /*

  PORTD |= (1 << PD4);  //CS5524 Chip-select auf high

  PORTD &= ~(1 << PD4); //CS5524 Chip-select auf low

  */

  delay(100);

  lcd.init();                         // LCD initialisierung

  lcd.backlight();                    // Einschalten Backlight

  lcd.setCursor(0, 0);                // Hochfahrbildschrim 1

  lcd.print("         V1         ");        // erste Zeile

  lcd.setCursor(0, 0);                // Hochfahrbildschrim 1

  lcd.print(clr1);        // erste Zeile

  lcd.setCursor(0, 1);                // setze Kursor in zweite Zeile

  lcd.print("                    ");      // zweite Zeile

  lcd.setCursor(0, 2);                // setze Kursor in zweite Zeile

  lcd.print("                    ");      // dritte Zeile

  lcd.setCursor(0, 3);                // Hochfahrbildschrim 1

  lcd.print("                    ");

  delay(1000);

  lcd.setCursor(0, 0);                // Hochfahrbildschrim 1

  lcd.print("     Pos1           ");        // erste Zeile

  delay(100);

  CS5524_init();

  delay(500);

  lcd.setCursor(0, 0);                // Hochfahrbildschrim 1

  lcd.print("     Pos2           ");        // erste Zeile

  Read_config_register();

  lcd.setCursor(0, 0);                // Hochfahrbildschrim 1

  lcd.print("     Pos3           ");        // erste Zeile

}

void Read_config_register()

{

  unsigned char config_register_werte = '1';

  lcd.setCursor(0, 0);                // Hochfahrbildschrim 1

  lcd.print("           Pos8      ");      // dritte Zeile

  lcd.setCursor(9, 0);                // Hochfahrbildschrim 1

  lcd.print(config_register_werte);        // erste Zeile

  delay(1000); 

  PORTD &= ~(1 << PD4); //CS5524 Chip-select auf low

  char data = 0b00001011; // byte zum Lesen von config_register

  spi_transfer(data);

  data = 0b00000000; //SDO flag loeschen

  spi_transfer(data);

  delay(1);

  ADC_Werte0 = spi_transfer(data);  //MSB

  ADC_Werte1 = spi_transfer(data);

  ADC_Werte2 = spi_transfer(data);  //LSB

  //ADC_Werte3 = spi_transfer(data);  //Infos

  PORTD |= (1 << PD4);  //CS5524 Chip-select auf high

  //lcd.setCursor(0, 3);   

  //lcd.print(" Autobus3           ");

  delay(10);

  lcd.setCursor(5, 0);             

  lcd.print(ADC_Werte0); 

  lcd.setCursor(5, 1);             

  lcd.print(ADC_Werte1); 

  lcd.setCursor(5, 2);             

  lcd.print(ADC_Werte2);   

  lcd.setCursor(0, 3);             

  lcd.print("                    ");      // dritte Zeile

  delay(5000);  

  channel_setup();

  delay(500);

}

void channel_setup()

{

  PORTD &= ~(1 << PD4); //CS5524 Chip-select auf low

  //Setting the channel setup register

  char data;

  data = 0b00000101;   

  spi_transfer(data);

  data = 0b00000100;    

  spi_transfer(data);

  data = 0b11000000;

  spi_transfer(data);

  data = 0b01000100;

  spi_transfer(data);

  data = 0b11000000;

  spi_transfer(data);  

  PORTD |= (1 << PD4);  //CS5524 Chip-select auf high

}

ISR(TIMER2_OVF_vect)

{

  static int counter = 0;

  TCNT2 = counterStart;

  counter++;

  if(counter == 250) // scaleFactor = 250

  {

    PORTD ^= (1<<PD7);

    counter = 0; 

  }

}

void loop()

{ 

  //lcd.print(" Autobusdd          ");

  delay(200);

  CS5524_read(1);

  delay(200);

  //lcd.setCursor(0, 3);               

  //lcd.print(" Autobus9aa         ");

}