how to create a control message

MIOS programming (C)
1

hi

simple question: how can I create a control message as mentioned in http://www.ucapps.de/midibox_link.html (the brown one) that just passes from core 1 to core 2? (I dont use core 3)

2

Hi t0gg1e4u,

The solution: every event which should be forwarded to the host software will be framed with a start and stop byte. The frame will be notified by the last core with disabled MIDI merger. Only the framed events will be forwarded by the last core (-> tunnled)’ date=’ all others will be filtered out.[/quote’]

The framing bytes are sent when you wrap the message inside MIOS_MIDI_BeginStream() and MIOS_MIDI_EndStream()

[tt]MIOS_MIDI_BeginStream();

  MIOS_MIDI_TxBufferPut(0xb0);

  MIOS_MIDI_TxBufferPut(0x07);

  MIOS_MIDI_TxBufferPut(0x7f);

MIOS_MIDI_EndStream(); [/tt]

Best,

Michael

3

Hey Michael, works just sweet, thank you very much!

4

Hi Michael

as it looks not all is that clear, since I dont have the desired results. here as I wrote in my codes:

core1:

MIOS_MIDI_MergerSet(MIOS_MIDI_MERGER_MBLINK_FP);

sends

MIOS_MIDI_BeginStream();

MIOS_MIDI_TxBufferPut(0x91);

MIOS_MIDI_TxBufferPut(newpin);

MIOS_MIDI_TxBufferPut(pin_value ? 0x00 : 0x01);

MIOS_MIDI_EndStream();

core2:

MIOS_MIDI_MergerSet(MIOS_MIDI_MERGER_MBLINK_EP);

core2 receives this midi message, but should pass it on, since its a “framed” event, right? however, it doesnt. why not?

5

Hi,

not sure, afaics it should work.

I expect you have wired everything correctly and core2 is able to send anything at all on the MIDI-Out?

And as you’re sending a Note-On on Ch2 (!) with a Velocity of “1” (remember: “0” is muted and “127” is loudest), I expect you debug the incoming messages with a logging program and not by hearing, 'cause you most likely cannot hear the message you’re sending…

If the answer to all this is “yes, of course!”:

Sorry, I never worked with linked Cores so far, so I’m not an expert on debugging these issues… anyone else got an idea, maybe?

Best,

Michael

6

I’m with you, AC. It all looked fine to me too.  ??? Likewise I’m no expert on this myself, so maybe I missed something.