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OOPic I2C I/O

This C++ programme for Windows communicates to a Savage Innovations OOPic microcontroller through the parallel port (using the I2C Dynamic-Data-Exchange Link). The OOPic code is also provided. Both writing and reading is possible. The example controls a servo motor connected to the OOPic. The I2C communication classes are ported from Savage Innovations' Visual Basic code of "I2CTools.exe". This programme is in fact a C++ version of the "21 Servos" programme in I2CTools.exe.

Although using the parallel port to talk to the OOPic is very slow, it might be handy if you want to control few variables on a simple OOPic I - you spare the time of tinkering a RS232/TTL level converter (converting RS232 to TTL levels). If you want reasonable speed, rather choose to do your OOPic/PC communication via the UART serial connection (oSerial, oSerialPort... objects).

Related Links

• Detailed documentation on Savage's homepage: http://www.oopic.com/oddelink.htm.
• More on OOPic programming in http://groups.yahoo.com/group/oopic.
• Control 21 servos from your PC.

Code

Notes

• The programme is developed on Win98, it should run on all Win9x and WinME platforms. NT, XP, 2000 require other methods of talking to the parallel port (see http://www.lvr.com/parport.htm on this topic).
• Please note that the LPT port address is hard-coded, so check if it is the correct one!
• Finding out the address of an oDDLink object in the OOPic's memory is easy: Choose "View->Opp Codes" from the OOPic developing environment's menu bar. In the source code window you should see a listing now, in which you should find a line like
  0022:041 '->rx
  in this case the address of an object with the variable name rx is 41.
• Don't forget to terminate the I2C network bus! (I did - see http://www.oopic.com/pgchap12.htm.)

Download

Download source code (M$ Visual C++ project, win-zip archive).

Whenever you use this code, let me know!

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