midikraken

KO | EN

gitlite — search

#javascript #python #llm #golang #machine-learning #deep-learning #docker #java #awesome-list #security #ios #mcp #openai #open-source

(★ 27)

A open source, open hardware up-to-16x USB-MIDI-interface for around 15 bucks in its smallest configuration.

midikraken 최신버젼 다운로드

최종 버전 다운로드 (.zip)

// repository documentation

Was this content helpful?

★ 0 (0 ratings)

Midikraken
==========

[![build](https://github.com/Windfisch/midikraken/actions/workflows/build.yml/badge.svg)](https://github.com/Windfisch/midikraken/actions/workflows/build.yml)
[![doc-links](https://github.com/Windfisch/midikraken/actions/workflows/doc-links.yml/badge.svg)](https://github.com/Windfisch/midikraken/actions/workflows/doc-links.yml)
[![binary_size](http://seriesci.com/Windfisch/midikraken/series/master/binary_size.svg)](https://seriesci.com/Windfisch/midikraken/series/binary_size)

An open-source, open-hardware MIDI-USB-interface supporting up to 16
(and maybe beyond?) MIDI ports. The hardware is based on a STM32F103
*"blue pill"* board which can be cheaply sourced from your favourite chinese
seller ([note about quality differences](https://github.com/Windfisch/analog-synth/blob/master/bluepill.md)),
plus other garden variety components such as HC2630 opto couplers (that's just
two 6N137 in one package), shift registers, some LEDs and resistors.

Apart from being a MIDI-USB-interface, Midikraken is a feature-packed MIDI
router supporting separate clock and note event routing, clock division.
Future features may include split-keyboard routing, clock generation or even a
hardware arpeggiator.

![Example of a Midikraken configuration](https://raw.githubusercontent.com/Windfisch/midikraken/master/hardware/img/midikraken_trs_din_ui.jpg)

Below you will find a technical overview. [A user manual is available here](documentation/README.md).

Releases
--------

Find the latest firmware upgrade packages [on the releases page](https://github.com/Windfisch/midikraken/releases).
You only need an USB cable, instructions for Linux and Windows are included.

The schematics and board layout files are [on a separate page](https://github.com/Windfisch/midikraken-hardware/releases).
Hardware and firmware are versioned separately, their numbers do not match.

Hardware
--------

Midikraken consists of two different PCBs that can be stacked (almost)
arbitrarily: [The DIN board](hardware/din5_pcb) has four traditional MIDI
in/out port pairs, and can house the master microcontroller.

[The TRS board](hardware/trs_pcb) gives you eight TRS MIDI pairs that support
both TRS-A and TRS-B. (Inputs are automatic, outputs need to be configured
in software). It can not house the microcontroller and thus cannot be used
without a DIN board.

The boards can be chained using their master/slave connectors and are
stackable using M3 screws / spacers. Currently, the firmware must be
adapted and recompiled according to the stack configuration. Currently,
a maximum of 16 port pairs is supported.

For information on the hardware, the revision history and errata, see [the hardware documentation](hardware/README.md).
A [build guide](documentation/build_guide/README.md) for rev01 and rev02 is available.

Firmware
--------

The firmware is written in Rust and is released under the GPLv3 license.

Since the STM32F103 only offers 3 hardware UARTs, we need to emulate the UART
protocol in software. For this, a timer interrupt oversamples the UART input pins
with thrice the baudrate in order to always read a stable bit at a non-edge.
(Guaranteed 1/3 * bit time distance from any edge, so the signal should be quite
stable until then.)

[Benchmarks show](firmware/benchmark/README.md) that this can be done fast
enough for up to 16 software UARTs (and likely even more), while leaving
plenty of cpu cycles (25% for 16 UARTs) free for other work.

Further information about the firmware itself can be found
[in the firmware documentation](firmware/README.md).

License
-------

The software in the [firmware](firmware) directory can be redistributed
and/or modified under the terms of the
[GNU General Public License Version 3](gpl3.txt). Note this does not apply
to the [bootloader](firmware/sboot/sboot_stm32) which is under its own
license.

The hardware designs in the [hardware](hardware) directory, excluding
[hardware/lib/3d](hardware/lib/3d) to which own conditions apply, can be
licensed under the terms of the [CERN OHL Version 2 license](cern_ohl_s_v2.txt).
This specifically includes (but is not limited to) schematics, PCB designs and
gerber files.

Contributing
------------

I am happy about contributions, just open a pull request!

**Note:** Even though Midikraken is licensed under GPLv3 and OHL-S-v2 (the exact
versions), any contributions / pull requests must be licensed under the
"GPLv3 *or any later version*" or "OHL-S-v2 *or any later version*", respectively.
This is because on the one hand, I want to be able to update the project to new
versions of these licenses, but on the other hand, I don't like licensing my work
under a license (e.g. the hypothetical GPLv4) that I haven't even read yet. If such
a license is released, I will likely adopt it after revising it.

midikraken

midikraken 최신버젼 다운로드

오늘의 추천 프로젝트

Was this content helpful?

Recent Feedback

midikraken

midikraken 최신버젼 다운로드

오늘의 추천 프로젝트

Was this content helpful?

Recent Feedback

Download README