Version : 2014-10-13
This arduino sketch has been developped for my bartop project.
Just few words about my it. It is not yet finished but it is composed mainly by :
- some wood,
- a PC,
- a LCD display,
- buttons and joysticks.
To manage the buttons, it is necessary to have an interface between buttons/joysticks and the PC in charge of the emulation. There are different solutions to do that.
- Reusing an existing keyboard. This is cheap but it is difficult to assign buttons to specific key because the matrix is not so simple,
- The other solution could be to buy a "ready-to-use" interface but I do not like this choice,
- The last one is to make the interface by yourself.
Instead of re-inventing the wheel, I have chosen the Teensy ([Web site|https://www.pjrc.com/teensy]) as a developpement board. It is arduino compatible but it manages the USB natively. Because I need to manage at least 30 different keys, I have decided to add an input-mutiplexing interface to the Teensy (See IExpender).
To go back to the sketch, it is very simple. It has been developped with Arduino 1.0.5 IDE to target a Teensy 2.0. Buttons should be connected to the interface (IExpender) according to the mapping table (See code). Then the interface has to be connected to the Teensy board, and of course the Teensy to the PC
Have fun !