Multiple serial port support on MIDI adapter

[Kirtai]

Hi, Since the Pico has two hardware serial ports would it be possible to support multiple serial ports? (or more with PIO?)

I expect that a merger/splitter would be too complex but maybe each port could be connected to a separate virtual USB cable? That would make it a multi-port MIDI interface which is something more unusual, especially with each port's channels being separate.

[Kirtai]

Oh ffs, now I feel really dumb. That one doesn't do the virtual cable stuff.

[rsta2]

Good idea! There is an updated version of the midi_adapter_flex on the branch virtual-midi-cable of this repo. If you manually replace the function midi_task() in main.cpp with this one, you should get a version, which connects UART0 to virtual MIDI cable 0 on USB and UART1 to virtual cable 1 respectively:

void midi_task(void)
{
    USB.Update ();
    UART0.Update ();
    UART1.Update ();

    CMIDIMessage Msg;

    if (USB.Read (&Msg))
    {
        if (Msg.Cable () == 0)
        {
            UART0.Write (Msg);
        }
        else if (Msg.Cable () == 1)
        {
            UART1.Write (Msg);
        }
    }

    if (UART0.Read (&Msg))
    {
        Msg.Cable (0);
        USB.Write (Msg);
    }

    if (UART1.Read (&Msg))
    {
        Msg.Cable (1);
        USB.Write (Msg);
    }
}

There is also an .uf2 file in the attached archive for easy install. Please note, that the updated code has not been tested. Let me know, if you got problems.

midi_adapter_flex.uf2.zip

[rsta2]

@Kirtai Did this work for you?

[rsta2]

The access methods for the virtual MIDI cable in midi_adapter_flex have been tested as far as possible and merged to the main branch. The branch virtual-midi-cable has been removed.

[Kirtai]

Oof, sorry for not getting back to you sooner but I'm waiting for components to arrive. Thanks for this :)