Hello Arduino community!
Im currently in a study group thats in the process of designing an exercise device, and im the one in charge of finding out how to code the arduino controlling everything. We've gotten ahold of one of those SparkFun electronics LCD displays, and i've been looking through the code on this side, and got it to work pretty easily. however, I've started to encounter some problems now. Making a small GUI for a 20x4 LCD Display takes quite a bit of coding, and even though it isnt something i cannot figure out how to do, we decided that it would be much nicer if we could make classes or libraries for the different thing, so only the thing the main sketch has to do is to include these classes/libs and then read inputs from the user and call the different functions(or whatever it is called) from the other classes, showing the right things in the GUI at the right time.
This is the serialLCDFunctions.cpp
#include "SoftwareSerial.h"
#include "Arduino.h"
#include "serialLCDFunctions.h"
//SerialLCD Functions
void::serialLCDFunctions selectLineOne(){ //puts the cursor at line 0 char 0.
Serial.write(0xFE); //command flag
Serial.write(128); //position
}
void::serialLCDFunctions selectLineTwo(){ //puts the cursor at line 2 char 0.
Serial.write(0xFE); //command flag
Serial.write(192); //position
}
void::serialLCDFunctions selectLineThree(){ //puts the cursor at line 3 char 0.
Serial.write(0xFE); //command flag
Serial.write(148); //position
}
void::serialLCDFunctions selectLineFour(){ //puts the cursor at line 4 char 0.
Serial.write(0xFE); //command flag
Serial.write(212); //position
}
void::serialLCDFunctions goTo(int position) { //position = line 1: 0-19, line 2: 20-39, etc, 79+ defaults back to 0
if (position<20){ Serial.write(0xFE); //command flag
Serial.write((position+128)); //position
}else if (position<40){Serial.write(0xFE); //command flag
Serial.write((position+128+64-20)); //position
}else if (position<60){Serial.write(0xFE); //command flag
Serial.write((position+128+20-40)); //position
}else if (position<80){Serial.write(0xFE); //command flag
Serial.write((position+128+84-60)); //position
} else { goTo(0); }
}
void::serialLCDFunctions clearLCD(){
Serial.write(0xFE); //command flag
Serial.write(0x01); //clear command.
}
void::serialLCDFunctions backlightOn(){ //turns on the backlight
Serial.write(0x7C); //command flag for backlight stuff
Serial.write(157); //light level.
}
void::serialLCDFunctions backlightOff(){ //turns off the backlight
Serial.write(0x7C); //command flag for backlight stuff
Serial.write(128); //light level for off.
}
void::serialLCDFunctions backlight50(){ //sets the backlight at 50% brightness
Serial.write(0x7C); //command flag for backlight stuff
Serial.write(143); //light level for off.
}
void::serialLCDFunctions serCommand(){ //a general function to call the command flag for issuing all other commands
Serial.write(0xFE);
}
And this is the serialLCDFunction.h
#ifndef serialLCDFunctions_h
#define serialLCDFunctions_h
#include "Arduino.h"
class serialLCDFunctions
{
public:
void selectLineOne();
void selectLineTwo();
void selectLineThree();
void selectLineFour();
void goTo(int position);
void clearLCD();
void backlightOn();
void backlightOff();
void backlight50();
void serCommand();
private:
};
#endif
please note that this piece of code (above) is actually dependant on the softwareSerial.h lib.
the prototypeGUI.cpp (this will in time "create" all different screens in the GUI)
#include "Arduino.h"
#include "prototypeGUI.h"
#include "serialLCDFunctions.h"
void prototypeGUI::startScreen(){
//Definition af startskærm
selectLineOne();
Serial.print(" Welcome to C17's");
delay(10);
selectLineTwo();
Serial.print(" Exercise prototype");
delay(10);
selectLineFour();
Serial.print(" >OK<");
delay(10);
}
and the prototypeGUI.h
#ifndef prototypeGUI_h
#define prototypeGUI_h
#include "Arduino.h"
class prototypeGUI
{
public:
void startScreen();
private:
};
#endif
problem is that this doesn't work it tells me that:
/home/rasmus/arduino/arduino-1.0/libraries/prototypeGUI/serialLCDFunctions.cpp:7:26: error: expected initializer before ‘selectLineOne’
/home/rasmus/arduino/arduino-1.0/libraries/prototypeGUI/serialLCDFunctions.cpp:11:26: error: expected initializer before ‘selectLineTwo’
/home/rasmus/arduino/arduino-1.0/libraries/prototypeGUI/serialLCDFunctions.cpp:15:26: error: expected initializer before ‘selectLineThree’
/home/rasmus/arduino/arduino-1.0/libraries/prototypeGUI/serialLCDFunctions.cpp:19:26: error: expected initializer before ‘selectLineFour’
/home/rasmus/arduino/arduino-1.0/libraries/prototypeGUI/serialLCDFunctions.cpp:23:26: error: expected initializer before ‘goTo’
I know this is Messy business. I could easily put all different functions in the main sketch, but its messy and i dont want that. The reason im being quite persistent about this is because i really want to learn how to make all my functions in the libs and then just tell the program how to use those in the main sketch. (or however to say it) i want to learn.
do you know that weird feeling when you realise that the problem was something obvious? that pretty much what i feel like right now 