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mruby-deb

Dirty simple compile and build solution for creating a .deb package for mruby suitable for use on Raspberry Pi.

Requirements

A standard Ruby (>=1.9) install is required for building mruby. In addition, the following deb packages are used by the set of mruby gems:

sudo apt-get install libssl1.0.0 i2c-tools libi2c-dev \
     libopencv-core2.4 libopencv-core-dev libopencv-dev \
     automake libtool libgsl0-dev libgsl0ldbl libgsl0-dbg \
     libreadline6 libreadline6-dev libreadline6-dbg \
     libpcre3 libpcre3-dev libpcre3-dbg \
     libyaml-0-2 libyaml-0-2-dbg

Furthermore, the wiringpi library v2 needs to be installed before using this mruby-gem. See the website for building instructions.

Build instructions

  • Step 0: [OPTIONAL] configure the list of mruby gems in build_mruby.rb.

  • Step 1: build latest mruby

$ ./build_mruby.rb
  • Step 2: build the debian package:
$ ./build.sh

Note that the build products get into the products subdir, and are marked with creation date and mruby git hash.

  • Step 3: install the package:
$ sudo dpkg -i products/mruby-unitn-YY.MM.DD-PATCHLEVEL.deb

List of functionalities

  • Raspberry Camera module
  • I2C master
  • GPIO pins on the Raspberry
  • Serial communication, including a simple command protocol for communicating with Arduino sketches (we call it RNCP, reverse notation command protocol)
  • Finite State Machine for clean design of application logic
  • Soft-realtime (0.1 ms time accuracy)
  • HTTP server for exposing APIs and web pages
  • Daemonizing facility

List of gems

The following gems are included. It is a rather complete selection allowing to use mruby on a Raspberry Pi for basic mechatronics tasks, especially when using the Raspberry module or the SerialPort class for talking to an Arduino connected via USB serial cable.

  • pbosetti/mruby-io: IO class
  • pbosetti/mruby-dir: Dir class
  • pbosetti/mruby-tempfile: temporary files
  • pbosetti/mruby-pcre-regexp: Perl-compatible Regular expressions
  • pbosetti/mruby-yaml: YAML emitter/parser
  • pbosetti/mruby-merb: ERB clone
  • pbosetti/mruby-complex: complex numbers
  • pbosetti/mruby-serialport: Serial port interface
  • pbosetti/mruby-shell: run shell commands and get the result
  • pbosetti/mruby-sleep: sleep (fractional seconds)
  • iij/mruby-pack: pack/unpack bytestreams
  • iij/mruby-socket: TCP/UDP sockets
  • iij/mruby-errno: C errno interface
  • iij/mruby-process: UNIX process management
  • ksss/mruby-signal: UNIX signals
  • mattn/mruby-thread: pthread support (experimental)
  • UniTN-mechatronics/mruby-ftp: FTP client
  • UniTN-mechatronics/mruby-raspberry: Interface to WiringPI library for IO
  • UniTN-Mechatronics/mruby-raspicam: OpenCV interface (preliminary)
  • UniTN-Mechatronics/mruby-kalman: Kalman filtering (preliminary)
  • UniTN-Mechatronics/mruby-mrubot: Utilities for robotics: NewtonRaphson solver, Ballistics class, Process and memory info (preliminary)
  • UniTN-Mechatronics/mruby-fsm: Finite state machine
  • pbosetti/mruby-emb-require: require script or compiled gems