midi_board_ONE

axefx.de Free MIDI-Board Project

This Project was born in the axefx.de community. It is already in testing and planing status. For more informations visit forum-thread. All in German!! DIY MIDI-Board

The goal of the project will be an Ardurino-Based MIDI-Controller...

This first Version only sends pre-defined PC or CC Messages. The Buttons will become static MIDI-Program-Change-Numbers. There is no Bank-Switching known from other MIDI-Boards.

Requierements

This project requieres the installation of the Arduino-MIDI-Library. Visit http://playground.arduino.cc/Main/MIDILibrary for downloading and installing this library.

Setup

To Setup an configure your personal board, you have to modify some variables.

setup.h

The file setup.h defines the most important global parameters. There are thre parameters to configure your base settings of your MIDI-Board:

• MAX_BUTTONS Here you define the numbers of switch-buttons on your board
• MIDI_CHANNEL MIDI-Channel-Number for sending your MIDI-Messages
• START_PROGRAM_NO This is the Preset/MIDI-Program-Number that will send by starting up your board

Button-Definition

To define, what kind of messages the buttons will send, you have to go to the main file "midi_board_ONE.ino". At the moment you can find and change the button-definitions in this file. In the "setup()" function there are some lines like:

buttons[0] = new Button(    3,       13,      "PC",    0,      0,     0,        LOW );
buttons[1] = new Button(    4,       14,      "PC",    0,      0,     0,        LOW );
buttons[2] = new Button(    5,       15,      "PC",    2,      0,     0,        LOW );
buttons[3] = new Button(    6,       16,      "PC",    3,      0,     0,        LOW );
buttons[4] = new Button(    7,       17,      "CC",   20,    127,     0,        LOW );
buttons[5] = new Button(    8,       18,      "CC",   21,    127,     0,        LOW );
buttons[6] = new Button(    9,       19,      "CC",   22,    127,     0,       HIGH );
buttons[7] = new Button(   10,       20,      "CC",   23,    127,     0,       HIGH );

You have to add some lines, if you changed the MAX_BUTTONS variable!!!

One line represents one Button. The Attributes after "new Button" are:

1. Button-Pin, where your Button is connected on the Arduino-Board
2. LED-Pin, where your Status-LED is connected on the Arduino-Board
3. Button-Function: PC - Program Change CC - Controller Change
4. First Byte, that will be send
   • If it is a PC-Button, here you have to put your Programm-Number.
   • If it is a CC-Button, here you have to put you Controller-Number.
5. High-Value, that will be send at a CC-Message depending on the Button-State (Activate)
6. Low-Value, that will be send at a CC-Message depending on the Button-State (Deactivate)
7. Initialising CC-Value. You can control, is one controller activated/deactivated at startup