This folder contains source code for:

• firm-ware of the teensy-midi-looper device
• simulation code intended for development, debugging and testing on desktop computer

arduino-midi-writer/Software

• arduino
  • c++ abstractions and implementations which allow compiling arduino code for x86_64.
• common
  • library with classes which are common to arduino, and x86_64
    • MidiLoopSequencer
    • MidiWriter
    • TFTPianoDisplay
• x86
  • application with test harness for x86_64 architecture

I am writing these c++ classes with compatibility for both x86 and arduino/teensy to allow me to debug the code without needing to upload the compiled binaries a microcontroller to test;

(I am thinking about implementing some form of mock tft display for use when debugging locally on my x86 platform, perhaps using JUCE)

• software requirements
  • Arduino
  • Teensyduino
  • Arduino libraries
    • MIDI Library
    • Queue
    • SD
    • Adafruit GFX Library
    • Adafruit ST7735 Library
    • Encoder
• compile
  • open arduino-midi-writer.ino in Arduino app
  • select teensy 3.6 board under tools menu in Arduino
• upload
  • plug your teensy into your PC via usb cable,
  • select correct serial port for teensy, under tools menu in Arduino
  • click program button

• You need a x86/x64 compatible c++11 toolchain installed

  • x86_64 build system uses cmake https://cmake.org/
    • each directory contains a CMakeLists.txt file
    • running cmake will create a .Makefile
    • build process can be triggered by running make
  • JetBrains CLion IDE
    • Very good integrated development environment. integrates very well with cmake.

• to build for x86/x64

  • open terminal to arduino_midi_writer/Software
    • build arduino abstractions library (libarduino_abstraction.a)

    $cd arduino
    $mkdir cmake-build-debug
    $cd cmake-build-debug/
    cmake -DCMAKE_BUILD_TYPE=Debug ..
    make
    

    • build common library (libteensy_midi_common.a)

    $cd ../../common/
    $mkdir cmake-build-debug
    $cd cmake-build-debug/
    cmake -DCMAKE_BUILD_TYPE=Debug ..
    make
    

    • build x86_64 test application

    $cd ../../x86/
    $mkdir cmake-build-debug
    $cd cmake-build-debug/
    cmake -DCMAKE_BUILD_TYPE=Debug .. 
    make
    

• to run

  • follow build instructions above open terminal to arduino_midi_writer/Software/x86/cmake-build-debug/

  ./arduino_midi_writer
  

• MidiWriter.h
  • write simple midi events to SMF on SD card
  • currently saves single track SMF (SMF type 0)
• TFTPianoDisplay.h
  • display incomming midi note on/off messages on a piano keyboard view
• MidiLoopSequencer.h (work in progress)
  • manage looping / recording / playing / event callbacks

• arduino midi library
  • https://github.com/PaulStoffregen/MIDI
• cppQueue
  • https://github.com/SMFSW/Queue
• Arduino menu
  • https://github.com/neu-rah/ArduinoMenu
• AdafruitGFX, Adafruit_ST7735
  • https://github.com/adafruit/Adafruit-GFX-Library
  • https://github.com/adafruit/Adafruit-ST7735-Library
• https://github.com/mpaland/printf