[sdiy] MIDI control syntax to debug 16 bits values on the MIDI steam using MIDI-OX MIDI monitor ? Solved !

[Jean-Pierre Desrochers]

I finally connected my small SALEAE logic analyzer on my PIC UART MIDI
output pin
and can visualize the data I’m sending for debugging.

Easy !

 

 





 

> -----Message d'origine-----

> De : Synth-diy <synth-diy-bounces at synth-diy.org> De la part de Richie

> Burnett

> Envoyé : 12 janvier 2025 07:16

> À : synth-diy at synth-diy.org

> Objet : Re: [sdiy] MIDI control syntax to debug 16 bits values on the MIDI

> steam using MIDI-OX MIDI monitor ?

> 

> >> When receiving just data bytes (hi bit of 0), the receiving MIDI

> >> driver applies running status, and in turn you see expanded full

> >> messages in MidiOx even though there wasn't a status byte on the cable.

> >

> > ...When debugging MIDI streams, it's best to have a precise picture of

> > the data on the wire.

> 

> Yes, I've been caught out by that before!  I hadn't realised that the
running

> status interpretation was a driver level thing, rather than a MIDI-OX
thing, but

> that makes sense.

> 

> One option I've used in the past was to connect an FTDI TTL to USB cable
to

> the UART Tx or Rx pin (or an opto-coupler output) and bring the MIDI data

> into the computer on a USB virtual COM port set to 31250 baud.  Then you

> can view/capture the data using a terminal program of your choice like
PuTTY,

> Termite, etc.  Then you see exactly what is on the cable.

> 

> -Richie,

> 

> 

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