Compiling error in Arduino library - c++

Question

I'm having a strange error compiling a sketch in Arduino, probably due to a mistake in a library I've created.
here's the code:
#include <BlueHartwin.h>
BlueHartwin bH(7,8,115200);
byte incomingByte;
void noOp(void)
{
Serial<<"noOp"<<endl;
};
void leftWindowDown(void)
{
Serial<<"leftWindowDown"<<endl;
};
void setup() {
Serial.begin(115200);
bH.registerCmd(0,&noOp);
bH.registerCmd(1,&leftWindowDown);
}
void loop() {
if(bH.available())
{
incomingByte = bH.read()-48;
Serial<<incomingByte<<endl;
if (incomingByte<nrOfCommands)
bH.runCmd(incomingByte);
}
}
Here are the header of the library:
#ifndef BlueHartwin_H
#define BlueHartwin_H
#include <SoftwareSerial.h>
#include <Streaming.h>;
#include <Arduino.h>
#define nrOfCommands 255
typedef void (* CmdFuncPtr) (); // this is a typedef to command functions
class BlueHartwin {
public:
BlueHartwin(byte bluetoothTx,byte bluetoothRx,long baudRate);
~BlueHartwin();
//void setup(byte bluetoothTx,byte bluetoothRx,long baudRate);
boolean registerCmd(byte id,CmdFuncPtr cmdFuncPtr);
boolean unRegisterCmd(byte id,CmdFuncPtr cmdFuncPtr);
boolean runCmd(byte id);
void setDataLength(byte dataLength);
byte getDataLength();
boolean available();
byte read();
private:
CmdFuncPtr setOfCmds[255];
byte mDataLength;
};
#endif
and source
#include "BlueHartwin.h";
SoftwareSerial bluetooth(7,8);
byte mDataLength;
BlueHartwin::BlueHartwin(byte bluetoothTx,byte bluetoothRx,long baudRate){
bluetooth = SoftwareSerial(bluetoothTx,bluetoothRx);
bluetooth.begin(baudRate);
}
BlueHartwin::~BlueHartwin(){
}
boolean BlueHartwin::registerCmd(byte id,CmdFuncPtr cmdFuncPtr){
if ((id<=nrOfCommands)&&(setOfCmds[id]==0)) {
setOfCmds[id]=cmdFuncPtr;
return true;
} else return false;
}
boolean BlueHartwin::unRegisterCmd(byte id,CmdFuncPtr cmdFuncPtr){
if (id<=nrOfCommands) {
setOfCmds[id]=0;
return true;
} else return false;
}
boolean BlueHartwin::runCmd(byte id){
if ((id<=nrOfCommands)&&(setOfCmds[id]!=0)) {
setOfCmds[id]();
return true;
} else return false;
}
void setDataLength(byte dataLength) {
mDataLength=dataLength;
}
byte getDataLength(){
return mDataLength;
}
boolean available(){
return true;
}
byte read(){
return 0;
}
This is the error I get:
sketch/Test_Bluehartwin00.ino.cpp.o: In function `loop':
/home/paolo/Projects/arduino/sketches/TESTS/Test_Bluehartwin00/Test_Bluehartwin00.ino:25: undefined reference to `BlueHartwin::available()'
/home/paolo/Projects/arduino/sketches/TESTS/Test_Bluehartwin00/Test_Bluehartwin00.ino:27: undefined reference to `BlueHartwin::read()'
collect2: error: ld returned 1 exit status
exit status 1
The strange thing is that I get error only in 2 of the public function of the library class.
I really can't understand what's wrong....
I'm using Arduino UNO and IDE 1.6.8 under Ubuntu 14.04 64 bit. Normally everything runs fine.
Thanks for help in advance.

Answer 1

The problem is in the .cpp file.
The two functions giving you a problem are here:
boolean available(){
return true;
}
byte read(){
return 0;
}
As these are, they are free/global functions. You need to make them part of the class:
boolean BlueHartwin::available(){
return true;
}
byte BlueHartwin::read(){
return 0;
}
Note: you'll also have to modify a few others also:
void BlueHartwin::setDataLength(byte dataLength) {
mDataLength=dataLength;
}
byte BlueHartwin::getDataLength(){
return mDataLength;
}
These can be fixed the same way.