Compiling Fail,

Projects Programming
1

Hi, I'm brand new to coding for Arduino. I'm trying to get a publically available code to compile, but get an error message that says

undefined reference to setup' cc7aH6bv.ltrans0.o:(.text.startup+0x8e): undefined reference to loop'.

My understanding is that the program doesn't know where the set up and loop segments are. I'm just not quite sure how and where to add it. The code is below. Any help for this Noob is greatly appreciated

/* MS5803_14

  • An Arduino library for the Measurement Specialties MS5803 family
  • of pressure sensors. This library uses I2C to communicate with the
  • MS5803 using the Wire library from Arduino.
  • This library only works with the MS5803-14BA model sensor. It DOES NOT
  • work with the other pressure-range models such as the MS5803-30BA or
  • MS5803-01BA. Those models will return incorrect pressure and temperature
  • readings if used with this library. See millerlp (Luke Miller) ยท GitHub for
  • libraries for the other models.
  • No warranty is given or implied. You are responsible for verifying that
  • the outputs are correct for your sensor. There are likely bugs in
  • this code that could result in incorrect pressure readings, particularly
  • due to variable overflows within some pressure ranges.
  • DO NOT use this code in a situation that could result in harm to you or
  • others because of incorrect pressure readings.
  • Licensed under the GPL v3 license.
  • Please see accompanying LICENSE.md file for details on reuse and
  • redistribution.
  • Copyright Luke Miller, April 1 2014
    */

#ifndef MS_5803
#define MS_5803

#include <Arduino.h>

class MS_5803 {
public:
// Constructor for the class.
// The argument is the desired oversampling resolution, which has
// values of 256, 512, 1024, 2048, 4096
MS_5803(uint16_t Resolution = 512);
// Initialize the sensor
boolean initializeMS_5803(boolean Verbose = true);
// Reset the sensor
void resetSensor();
// Read the sensor
void readSensor();
//*********************************************************************
// Additional methods to extract temperature, pressure (mbar), and the
// D1,D2 values after readSensor() has been called

// Return temperature in degrees Celsius.
float temperature() const {return tempC;}
// Return pressure in mbar.
float pressure() const {return mbar;}
// // Return temperature in degress Fahrenheit.
// float temperatureF() const {return tempF;}
// // Return pressure in psi (absolute)
// float psia() const {return psiAbs;}
// // Return pressure in psi (gauge)
// float psig() const {return psiGauge;}
// // Return pressure in inHg
// float inHg() const {return inHgPress;}
// // Return pressure in mmHg
// float mmHg() const {return mmHgPress;}
// Return the D1 and D2 values, mostly for troubleshooting
unsigned long D1val() const {return D1;}
unsigned long D2val() const {return D2;}

private:

float mbar; // Store pressure in mbar.
float tempC; // Store temperature in degrees Celsius
// float tempF; // Store temperature in degrees Fahrenheit
// float psiAbs; // Store pressure in pounds per square inch, absolute
// float psiGauge; // Store gauge pressure in pounds per square inch (psi)
// float inHgPress; // Store pressure in inches of mercury
// float mmHgPress; // Store pressure in mm of mercury
unsigned long D1; // Store D1 value
unsigned long D2; // Store D2 value
int32_t mbarInt; // pressure in mbar, initially as a signed long integer
// Check data integrity with CRC4
unsigned char MS_5803_CRC(unsigned int n_prom[]);
// Handles commands to the sensor.
unsigned long MS_5803_ADC(char commandADC);
// Oversampling resolution
uint16_t _Resolution;
};

#endif

2

It looks to me like you're trying to compile a .h header file.

Please remember to use code tags when posting code

3

That "code" is a library. You can not compile libraries by themselves. You MUST have a sketch, with a setup() function and a loop() function.

4

Title fail (?). Also please use code-tags when posting code.

You posted a header file of a library. This will get you started on the topic.

5

thanks