Virtual Wire library conflict with Wavehc library

Projects Programming
1

Just including these two libraries within the same sketch generates an error when trying to compile, which looks like this:

VirtualWire\VirtualWire.cpp.o: In function __vector_11': C:\arduino-1.0\libraries\VirtualWire/VirtualWire.cpp:416: multiple definition of __vector_11'
WaveHC\WaveHC.cpp.o:C:\arduino-1.0\libraries\WaveHC/WaveHC.cpp:41: first defined here

Is there a way to get these two libraries to work with each other. Or do I even need the Virtual Wire library at all?

Thanks for any and all help.

2

Could you post your library versions and maybe links to download them and which version of the Arduino software you use. I tried compiling a sketch but got another error.

3

Virtual Wire Library (version 1.5) :
http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Wireless/General/VirtualWire-1.5.zip

WaveHC Library (version 20110919):
http://code.google.com/p/wavehc/downloads/list

Thanks!

4

What I had to do to get the libraries compile:

  • edit VirtualWire.h includes: replace wiring.h with arduino.h
  • edit VirtualWire.cpp: comment out WProgram.h include

I searched the web and found version 1.9 (http://www.open.com.au/mikem/arduino/) which compiles with Arduino 1.0.
WaveHC compiles without modification.

Both use Timer1 interrupts - the compilation error you get tells just this.

What can be done?
I have read there are two of those 8 bit timers and if I remember correctly they are only used for PWM output. So I would play with the VirtualWire library to get it running on the other timer and then you can add WaveHQ without the compiling trouble - this is what I achieved already, but I do not have any hardware to test the functionality of VirtualWire.

The following alterations could get you a working VirtualWire on Timer2, modifications on version 1.9
First is the function at line 253 of VirtualWire.cpp where I changed everything to Timer2 (hope you do not have an atmega168, no idea what the TIMSK1 anomaly here is)

// Speed is in bits per sec RF rate
void vw_setup(uint16_t speed)
{
    // Calculate the OCR2A overflow count based on the required bit speed
    // and CPU clock rate
    uint16_t ocr2a = (F_CPU / 8UL) / speed;

#ifndef TEST
    // Set up timer2 for a tick every 62.50 microseconds 
    // for 2000 bits per sec
    TCCR2A = 0;
    TCCR2B = _BV(WGM12) | _BV(CS10);
    // Caution: special procedures for setting 16 bit regs
    OCR2A = ocr2a;
    // Enable interrupt
#ifdef TIMSK1
    // atmega168
    TIMSK1 |= _BV(OCIE2A);
#else
    // others
    TIMSK |= _BV(OCIE2A);
#endif

#endif

    // Set up digital IO pins
    pinMode(vw_tx_pin, OUTPUT);
    pinMode(vw_rx_pin, INPUT);
    pinMode(vw_ptt_pin, OUTPUT);
    digitalWrite(vw_ptt_pin, vw_ptt_inverted);
}

Second change is at line 416

SIGNAL(TIMER2_COMPA_vect)

the line with the compile error. Now the ISR for Timer2 is used.

I have no idea if this will work or if it is even good to take Timer2 for this purpose. Anyone with more experience here to look at this?