Handling both Serial & USB

[tercerapersona]

Hi, I'm working in a MIDI instrument that I would like to support both serial & midi clock + messages, like any other industrial instrument.

I haven't seen any example on the whole internet, would you provide one?

Use cases:

• MIDI clock read from serial is connected.
• MIDI clock read from USB is connected.
• MIDI clock read from digital pin (optional, audio cable 3.5mm)
• MIDI messages read from serial & USB (if any or both are connected)
• MIDI messages sent to serial & USB (if any or both are connected)