Difference between revisions of "ER-USB-MIDI"
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=== MIDI In === | === MIDI In === | ||
| + | |||
| + | * 3.3V MIDI serial out to [[Arduino Pro Mini]] | ||
| + | ** R6 = 680 | ||
| + | ** R7 = 1.2K | ||
[[file:ER-USB-MIDI_IN.PNG]] | [[file:ER-USB-MIDI_IN.PNG]] | ||
Revision as of 13:44, 16 January 2023
Contents
Features
- USB MIDI to MIDI Serial
- MIDI In/Out
- Based on Adafruit QT Py RP2040 USB to Serial MIDI Friends design
- Built on ER-PROTO-02
- XAIO RP2040 CPU
- MIDI on TRS A type connector
- J6 = MIDI Serial output
- J5 = MIDI Serial input (future feature)
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.
Design
XAIO RP2040 CPU
MIDI Jacks
- J5, J6 = PJ366ST
- Install both Pot/Jack headers/sockets
- Female sockets on Controls card
- Male Pins on Daughtercard
MIDI In
- 3.3V MIDI serial out to Arduino Pro Mini
- R6 = 680
- R7 = 1.2K
Daughtercard Prototyping Area
Build
Software
- Adafruit MIDI Friends
- Bridges USB MIDI to Serial MIDI
- Takes in MIDI from the USB (typically from a PC running a MIDI player) and send out MIDI
- Maintains optical isolation on MIDI
- Bridges USB MIDI to Serial MIDI
- Listens to MIDI Channel 1
- Load CircuitPython to card (using v7.x)
- Press right button then insert USB cable
- Drive will appear on PC
- Drop CircuitPython uf2 onto the drive
- Drop application and libraries onto card - Drop as code.py to auto-run
- Download/run MIDIEditor
- Edit
- Settings
- MIDI Output
- Select CircuitPython Audio
- Load MIDI file (Free MIDI files sites)
- Click play button
