Code to digital potentiometer not compiling

Projects Programming
1

Hi,
i have just started a new project where i need a dig potentiometer. I got my hands on AD5242 and somebody gave me their codes on controling it. The thing is that the code doesn't compile and i am quite new to the arduino and don't really understand the code itself.

Code itself:

#include "AD524X.h"
#include "Wire.h"

AD524X AD01(0x2C);  
AD524X AD02(0x2D);
AD524X AD03(0x2E);
AD524X AD04(0x2F);

void setup()
{
  Serial.begin(115200);
  Serial.println("Zacatek mereni: ");
  

  Wire.begin();
  TWBR = 72;  // 100KHz
}

void loop()
{
  int val;
  int delayTime = 500;
  int resistance = 0;

  delay(delayTime);
  AD01.write(0, 0);
  AD01.write(1, 0);
  AD02.write(0, 0);
  AD02.write(1, 255);
  AD03.write(0, 0);
  AD03.write(1, 0);
  AD04.write(0, 0);
  AD04.write(1, 0);
  delay(2000);
  for (val = 0; val <= 255; val++, resistance++)
  {
    AD01.write(0, val);
    delay(delayTime);
    Serial.println(resistance);
  }
  for (val = 0; val <= 255; val++, resistance++)
  {
    AD01.write(1, val);
    delay(delayTime);
    Serial.println(resistance);
  } 
    for (val = 0; val <= 255; val++, resistance++)
  {
    AD02.write(0, val);
    delay(delayTime);
    Serial.println(resistance);
  }
  for (val = 255; val >= 0; val--, resistance++)
  {
    AD02.write(1, val);
    delay(delayTime);
    Serial.println(resistance);
  }
  for (val = 0; val <= 255; val++, resistance++)
  {
    AD03.write(0, val);
    delay(delayTime);
    Serial.println(resistance);
  }
    for (val = 0; val <= 255; val++, resistance++)
  {
    AD03.write(1, val);
    delay(delayTime);
    Serial.println(resistance);
  }
  for (val = 0; val <= 255; val++, resistance++)
  {
    AD04.write(0, val);
    delay(delayTime);
    Serial.println(resistance);
  }
  for (val = 0; val <= 255; val++, resistance++)
  {
    AD04.write(1, val);
    delay(delayTime);
    Serial.println(resistance);
  }
   delay(1000);
  }

AD524X.h

//
//    FILE: AD524X.h
//  AUTHOR: Rob Tillaart
// VERSION: 0.1.03
// PURPOSE: I2C digital PotentioMeter AD5241 AD5242
//    DATE: 2013-10-12
//     URL:
//
// Released to the public domain
//

#ifndef AD524X_h
#define AD524X_h

#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif

#include <Wire.h>

#define AD524X_VERSION "0.1.03"

#define AS524X_OK       0
#define AS524X_ERROR    100

class AD524X
{
public:
    // address
    explicit AD524X(const uint8_t);

    uint8_t zeroAll();
    // rdac
    uint8_t read(const uint8_t);
    // for debugging
    uint8_t readBackRegister();  // returns the last value written in register.

    // rdac value
    uint8_t write(const uint8_t, const uint8_t);
    // rdac value O1 O2
    uint8_t write(const uint8_t, const uint8_t, const uint8_t, const uint8_t);

    uint8_t setO1(const uint8_t);  // HIGH / LOW
    uint8_t setO2(const uint8_t);  // HIGH / LOW
    uint8_t getO1();
    uint8_t getO2();

    // rdac
    uint8_t midScaleReset(const uint8_t);
    //
    // uint8_t shutDown();

private:
    uint8_t send(const uint8_t, const uint8_t);     // cmd value

    uint8_t _address;
    uint8_t _lastValue[2];
    uint8_t _O1;
    uint8_t _O2;
};

#endif

The error says:

C:\Users\Ivan\AppData\Local\Temp\cchHU81d.ltrans0.ltrans.o: In function `global constructors keyed to 65535_0_Ovladani_dig_potenciometru.ino.cpp.o.1886':

cchHU81d.ltrans0.o:(.text.startup+0x76): undefined reference to `AD524X::AD524X(unsigned char)'

cchHU81d.ltrans0.o:(.text.startup+0x80): undefined reference to `AD524X::AD524X(unsigned char)'

cchHU81d.ltrans0.o:(.text.startup+0x8a): undefined reference to `AD524X::AD524X(unsigned char)'

cchHU81d.ltrans0.o:(.text.startup+0x94): undefined reference to `AD524X::AD524X(unsigned char)'

C:\Users\Ivan\AppData\Local\Temp\cchHU81d.ltrans0.ltrans.o: In function `main':

cchHU81d.ltrans0.o:(.text.startup+0x1fa): undefined reference to `AD524X::write(unsigned char, unsigned char)'

cchHU81d.ltrans0.o:(.text.startup+0x206): undefined reference to `AD524X::write(unsigned char, unsigned char)'

cchHU81d.ltrans0.o:(.text.startup+0x212): undefined reference to `AD524X::write(unsigned char, unsigned char)'

cchHU81d.ltrans0.o:(.text.startup+0x21e): undefined reference to `AD524X::write(unsigned char, unsigned char)'

cchHU81d.ltrans0.o:(.text.startup+0x22a): undefined reference to `AD524X::write(unsigned char, unsigned char)'

C:\Users\Ivan\AppData\Local\Temp\cchHU81d.ltrans0.ltrans.o:cchHU81d.ltrans0.o:(.text.startup+0x236): more undefined references to `AD524X::write(unsigned char, unsigned char)' follow

collect2.exe: error: ld returned 1 exit status

exit status 1

I dont really understant where might be the problem and would like to ask you for help. Thank you.

2

Please do yourself and us a favour and read this before posting a programming question then post your code here using code tags.

3

Why

#include "AD524X.h"
#include "Wire.h"

and not the normal

#include <AD524X.h>
#include <Wire.h>

??

Where have you put AD524X.h? Surely this should be a library in your libraries directory?
You have link errors which suggests you haven't installed the library in libraries.

include <> syntax is for libraries, include "" syntax is for include files in the same directory as the
sketch. It affects the order places are searched for the include file.

4

I do have the files in the same directory as the sketch, so that shouldn't make a problem.

5

And where is AD524X.cpp?

6

Okey, that might be the problem, I do not have AD524X.cpp anywhere, am i suppoused to place it in the same directory?

EDIT: after placing AD524X.cpp in the same directory it compiles just fine, THANK YOU, very much.

let's hope it will work as it should

EDIT2: So thank you again, the code works fine, but only problem is that the serial monitor is not printing the values as it should, but insted of that does print soem wierd letters. Does anybody know whot could be wrong with that?

7

Does anybody know whot could be wrong with that?

Is the baud rate correct ?

8

Wasn't. Now is and everything works fine. Thank you.