Difference between revisions of "ER-USB-MIDI"

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[[File:tindie-mediums.png|link=https://www.tindie.com/products/28896/]]
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[[FILE:ER-USB-MIDI_P1090014-720PX.jpg]]
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== Features ==
 
== Features ==
  
* USB MIDI to MIDI Serial Output
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* MIDI/Serial interface
** MIDI In/Out
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** Out/In
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** Based on [https://learn.adafruit.com/qt-py-rp2040-usb-to-serial-midi-friends/overview Adafruit QT Py RP2040 USB to Serial MIDI Friends design]
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* USB MIDI to MIDI Serial
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* MIDI Serial to USB MIDI
 
* Built on [[ER-PROTO-02]]
 
* Built on [[ER-PROTO-02]]
 
* [[QT_Py_(RP2040_based)|XAIO RP2040 CPU]]
 
* [[QT_Py_(RP2040_based)|XAIO RP2040 CPU]]
* Based on [https://learn.adafruit.com/qt-py-rp2040-usb-to-serial-midi-friends/overview Adafruit QT Py RP2040 USB to Serial MIDI Friends design]
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* MIDI over TRS A type connector
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* J5 = MIDI Serial input
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* J6 = MIDI Serial output
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=== Resources ===
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* [https://minimidi.world/ A simplified guide to TRS MIDI]
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== Seeeduino XIAO RP2040 ==
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There are 14 GPIO PINs on XIAO RP2040, on which there are 11 digital pins, 4 analog pins, 11 PWM Pins,1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface.
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* [https://www.seeedstudio.com/XIAO-RP2040-v1-0-p-5026.html Seeed XIAO RP2040 product page]
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* [https://wiki.seeedstudio.com/XIAO-RP2040/ Seeed XIAO RP2040 wiki page]
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[[file:seeed-xinpin-rp2040.jpg]]
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== Design ==
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=== XAIO RP2040 CPU ===
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[[file:ER-USB-MIDI_RP2040.PNG]]
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=== MIDI Jacks ===
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[[file:ER-USB-MIDI_JACKS.PNG]]
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* J5, J6 = PJ366ST
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* Install both Pot/Jack headers/sockets
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** Female sockets on Controls card
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** Male Pins on Daughtercard
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=== MIDI In ===
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* 3.3V MIDI serial out to [[Arduino Pro Mini]]
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** R6 = 680
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** R7 = 1.2K
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[[file:ER-USB-MIDI_IN.PNG]]
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== Daughtercard Prototyping Area ==
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[[FILE:ER-PROTO-02-DB_REAR_PWR.png]]
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== Build ==
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* Daughtercard/Controls card
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[[FILE:ER-USB-MIDI_P1090022-720px.jpg]]
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* Cap on MIDI In GND pin
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[[FILE:ER-USB-MIDI_P1090027-720px.jpg]]
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== Software ==
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* [https://learn.adafruit.com/qt-py-rp2040-usb-to-serial-midi-friends Adafruit MIDI Friends]
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** Bridges USB MIDI to Serial MIDI
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*** Takes in MIDI from the USB (typically from a PC running a MIDI player) and send out MIDI
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*** Maintains optical isolation on MIDI
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* [https://docs.circuitpython.org/projects/midi/en/latest/api.html#adafruit_midi Adafruit MIDI API]
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* Listens to MIDI Channel 1
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* Load CircuitPython to card (using v7.x)
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** Press right button then insert USB cable
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** Drive will appear on PC
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** Drop [https://github.com/land-boards/QT-Py/tree/main/CircuitPython/CircuitPython_Firmware/XIAO_RP2040 CircuitPython uf2] onto the drive
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* Drop [https://github.com/land-boards/QT-Py/blob/main/CircuitPython/Seeed_XIAO_RP2040/ER-USB-MIDI/code.py application and libraries onto card] - Drop as code.py to auto-run
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* Download/run [http://www.midieditor.org/ MIDIEditor]
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** Edit
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** Settings
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** MIDI Output
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*** Select CircuitPython Audio
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** Load MIDI file ([https://midination.com/midi/free-midi-files/ Free MIDI files sites])
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** Click play button

Latest revision as of 22:39, 16 January 2023

Tindie-mediums.png

ER-USB-MIDI P1090014-720PX.jpg

Features

Resources

Seeeduino XIAO RP2040

There are 14 GPIO PINs on XIAO RP2040, on which there are 11 digital pins, 4 analog pins, 11 PWM Pins,1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface.

Seeed-xinpin-rp2040.jpg

Design

XAIO RP2040 CPU

ER-USB-MIDI RP2040.PNG

MIDI Jacks

ER-USB-MIDI JACKS.PNG

  • J5, J6 = PJ366ST
  • Install both Pot/Jack headers/sockets
    • Female sockets on Controls card
    • Male Pins on Daughtercard

MIDI In

ER-USB-MIDI IN.PNG

Daughtercard Prototyping Area

ER-PROTO-02-DB REAR PWR.png

Build

  • Daughtercard/Controls card

ER-USB-MIDI P1090022-720px.jpg

  • Cap on MIDI In GND pin

ER-USB-MIDI P1090027-720px.jpg

Software