USBH_MIDI is USB-MIDI class driver for Arduino USB Host Shield 2.0 Library.
You can convert USB MIDI keyboard to legacy serial MIDI.
Please check device list

How to install

USBH_MIDI is included in USB Host Shield 2.0 Library.

for single device

File->Examples->USB Host Shield library 2.0->USBH_MIDI->USB_MIDI_converter

for multiple device (with USB hub)

File->Examples->USB Host Shield library 2.0->USBH_MIDI->USB_MIDI_converter_multi

API

uint8_t RecvData(uint8_t *outBuf)

Receive MIDI message (3 bytes)
return value is MIDI message length(0-3)

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uint8_t RecvData(uint16_t *bytes_rcvd, uint8_t *dataptr)

Receive raw USB-MIDI Event Packets (each 4 bytes, upto 64 bytes).
dataptr must allocate 64bytes buffer.
return value is 0:Success, non-zero:Error(MAX3421E HRSLT) and bytes_rcvd is received USB packet length.
note: USB packet length is not necessarily the length of the MIDI message.

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uint8_t SendData(uint8_t *dataptr, byte nCable=0)

Send MIDI message. You can set CableNumber(default=0).
return value is 0:Success, non-zero:Error(MAX3421E HRSLT)

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uint8_t SendSysEx(uint8_t *dataptr, unsigned int datasize, byte nCable=0)

Send SysEx MIDI message. You can set CableNumber(default=0).
return value is 0:Success, non-zero:Error(MAX3421E HRSLT)
note: You must set first byte:0xf0 and last byte:0xf7

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License

Copyright © 2012-2016 Yuuichi Akagawa (@YuuichiAkagawa)