Problem in verify / compile a "test" with amarino.

system · March 19, 2012, 2:56am

Hello everyone... I'm new on arduino and I'm trying to create a project with a BTmodule using the amarino(http://www.amarino-toolkit.ne).
I'm following a tutorial in amarino's webpage but when I verify or compile the code in arduino IDE have a problem:

In file included from Test.cpp:6:
C:\arduino-1.0\libraries\MeetAndroid/MeetAndroid.h:104: error: conflicting return type specified for 'virtual void MeetAndroid::write(uint8_t)'
C:\arduino-1.0\hardware\arduino\cores\arduino/Print.h:48: error: overriding 'virtual size_t Print::write(uint8_t)'

Code in arduino IDE is:

/*
  Receives Test Events from your phone.
  After it gets a test message the led 13 will blink.
*/
 
#include <MeetAndroid.h>

MeetAndroid meetAndroid;
int onboardLed = 13;

void setup()  
{
  // use the baud rate your bluetooth module is configured to 
  // not all baud rates are working well, i.e. ATMEGA168 works best with 57600
  Serial.begin(57600); 
  
  // register callback functions, which will be called when an associated event occurs.
  // - the first parameter is the name of your function (see below)
  // - match the second parameter ('A', 'B', 'a', etc...) with the flag on your Android application
  meetAndroid.registerFunction(testEvent, 'A');  

  pinMode(onboardLed, OUTPUT);
  digitalWrite(onboardLed, HIGH);

}

void loop()
{
  meetAndroid.receive(); // you need to keep this in your loop() to receive events
}

/*
 * This method is called constantly.
 * note: flag is in this case 'A' and numOfValues is 1 (since test event sends a random int)
 */
void testEvent(byte flag, byte numOfValues)
{
  // the test event in Amarino generates a random value between 0 and 255
  int randomValue = meetAndroid.getInt();
  
  flushLed(300);
  flushLed(300);
  flushLed(randomValue);
}

void flushLed(int time)
{
  digitalWrite(onboardLed, LOW);
  delay(time);
  digitalWrite(onboardLed, HIGH);
  delay(time);
}

If someone know... help me to solve it plx!
Thx everyone and sorry my english!

EDIT: I try with IDE 022 and 1.0... In 022 was show me more errors... in 1.0 was only this post.

nickgammon · March 19, 2012, 3:38am

Better edit MeetAndroid.h and at around line 104 change the return type for MeetAndroid::write from void to size_t.

system · March 19, 2012, 11:25am

Hello Nick.
Thanks for your help, but I don'r understand it so good... in line 104 I have:

102 - void getDoubleValues(float[]); // in Arduino double and float are the same
103 - 
104 - void write(uint8_t);
105 - 
106 - void send(char);

What's about "write from void to size_t" ?

Thx!

system · March 19, 2012, 12:49pm

Right there on line 104, it says that write()'s return type is void. It isn't supposed to be void, anymore. It is now supposed to be size_t.

Don't forget that the function is supposed to actually return a meaningful value, too.

system · March 19, 2012, 3:46pm

Hey PaulS thx man!
So I have that change "void" for a type "size_t" ?
size_t is a type like void, int, float ?

And my line 104 will be like:
104 - void size_t(uint8_t);
?

Thx!

system · March 19, 2012, 3:56pm

So I have that change "void" for a type "size_t" ?

Yes. That's what you've been told several times now.

size_t is a type like void, int, float ?

Yes.

And my line 104 will be like:

No. You need to change the return type, not the function name.

system · March 19, 2012, 4:54pm

Sorry PaulS, I wrote it wrong...
Will be: size_t write(uint8_t);
?

Thx for ur patience! :l

system · March 19, 2012, 4:58pm

Will be: size_t write(uint8_t);

Yes.

You need, of course, to make a corresponding change to the source file and add a return statement to the function.

system · March 19, 2012, 5:07pm

I try run it and IDE show me a long list of errors...
Can you give me a sample of add a return statement to the function?
Infinitely grateful!

system · March 19, 2012, 5:17pm

I try run it and IDE show me a long list of errors...
Can you give me a sample of add a return statement to the function?

Post the code you modified.

Adding a return statement is trivial.

size_t write(uint8_t val)
{
// Do something with val
return 1;
}

system · March 19, 2012, 5:23pm

Edit: this code is from librarie MeetAndroid_h if a send to u the code that IDE is trying compile u can try run in your pc and look if it works?

the code is:

#ifndef MeetAndroid_h
#define MeetAndroid_h

#include <inttypes.h>
#include "Print.h"


/******************************************************************************
* Definitions
******************************************************************************/

class MeetAndroid : public Print

{
#define ByteBufferLenght 64
#define FunctionBufferLenght 75 // 48-122 (in ascii: 0 - z)
#define FunctionBufferOffset 48  // offset to calc the position in the function buffer ('0' should be stored in intFunc[0])
#define _MEET_ANDROID_VERSION 2 // software version of this library
private:
	// per object data
	uint8_t bufferCount;
	uint8_t buffer[ByteBufferLenght];
	
	int numberOfValues;
	
	char abord;
	char ack;
	char delimiter;
	char startFlag; // used to communicate with Android (leads each msg to Android)
	
	bool customErrorFunc;

	typedef void (*H_voidFuncPtr)(uint8_t, uint8_t);
	H_voidFuncPtr intFunc[FunctionBufferLenght];
	H_voidFuncPtr errorFunc;

	// static data

	// private methods
	void processCommand(void);
	void init(void);
	int getArrayLength();

public: 
	// public methods
	MeetAndroid(H_voidFuncPtr err);
	MeetAndroid(void);
	
	void flush(void);
	bool receive(void);
	void registerFunction(void(*)(uint8_t, uint8_t),uint8_t);
	void unregisterFunction(uint8_t);
	int bufferLength(){return bufferCount;} // buffer withouth ACK
	int stringLength(){return bufferCount;} // string without flag but '/0' at the end
	void getBuffer(uint8_t[]);
	
	void getString(char[]);
	int getInt();
	long getLong();
	float getFloat();
	double getDouble();
	void getIntValues(int[]);
	void getFloatValues(float[]);
	void getDoubleValues(float[]); // in Arduino double and float are the same
	
	size_t write(uint8_t);

	void send(char);
    void send(const char[]);
    void send(uint8_t);
    void send(int);
    void send(unsigned int);
    void send(long);
    void send(unsigned long);
    void send(long, int);
    void send(double);
    void sendln(void);


	uint16_t waitTime;
	
	static int library_version() { 
		return _MEET_ANDROID_VERSION;} 
};

// Arduino 0012 workaround
#undef int
#undef char
#undef long
#undef byte
#undef float
#undef abs
#undef round 

#endif

nickgammon · March 19, 2012, 7:49pm

jpvr:
I try run it and IDE show me a long list of errors...
Can you give me a sample of add a return statement to the function?
Infinitely grateful!

Did you make the change PaulS suggested?

... long list of errors ...

Well, post them. At least the first ones.

system · March 20, 2012, 2:54am

Hello Nick... I don't know if I make it right... but IDE return me it:
C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp:22:24: error: WConstants.h: No such file or directory
C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp: In member function 'bool MeetAndroid::receive()':
C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp:86: error: 'boolean' was not declared in this scope
C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp:86: error: expected `;' before 'timeout'
C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp:87: error: 'timeout' was not declared in this scope
C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp:108: error: 'delayMicroseconds' was not declared in this scope
C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp:112: error: 'timeout' was not declared in this scope
C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp: At global scope:
C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp:252: error: prototype for 'void MeetAndroid::write(uint8_t)' does not match any in class 'MeetAndroid'
C:\arduino-1.0\libraries\MeetAndroid/MeetAndroid.h:104: error: candidate is: virtual size_t MeetAndroid::write(uint8_t)

I modify my file MeetAndroid.cpp to:

void MeetAndroid::write(uint8_t b){
	Serial.print(b);
	return 1;
}

:S

Thx for help friends!

nickgammon · March 20, 2012, 3:01am

Change:

  #include "WConstants.h"

to:

  #include "Arduino.h"

system · March 20, 2012, 3:10am

Done, now have only its error msg:

C:\arduino-1.0\libraries\MeetAndroid\MeetAndroid.cpp:252: error: prototype for 'void MeetAndroid::write(uint8_t)' does not match any in class 'MeetAndroid'
C:\arduino-1.0\libraries\MeetAndroid/MeetAndroid.h:104: error: candidate is: virtual size_t MeetAndroid::write(uint8_t)

:D:D:D:D

nickgammon · March 20, 2012, 3:19am

You have also got to change that word "void" to "size_t". This is the implementation, the other one was the prototype.

system · March 20, 2012, 3:36am

Ahhhh now I'm understanding

Now I'm geting a new msg error:

java.lang.NullPointerException
at processing.app.debug.Compiler.execAsynchronously(Compiler.java:326)
at processing.app.debug.Compiler.compileFiles(Compiler.java:274)
at processing.app.debug.Compiler.compile(Compiler.java:166)
at processing.app.Sketch.build(Sketch.java:1569)
at processing.app.Sketch.build(Sketch.java:1546)
at processing.app.Editor$DefaultRunHandler.run(Editor.java:1845)
at java.lang.Thread.run(Thread.java:619)

some problem with java compiler?

Thx

nickgammon · March 20, 2012, 4:07am

It does that at times. I usually just try again.

system · March 20, 2012, 11:23am

I restarted my machine and it's work!
Thank PaulS and Nick for your help! I hope one day to give it back.

Very thxxx!

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Problem in verify / compile a "test" with amarino.

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