[sdiy] Logicport

[Ullrich Peter]

For me the logic analyzers with serial interpreters are also a nice tools for reengineering old musical instruments.
Not only sniffing the MIDI interface but normal RS232 interfaces.

One of my projects on the Todo list is the analysation of the Behringer Cybermix CM8000 control interface as the old windows software if not usable on WinXP upwards without additional tools...
So I want to analyze the interface to know what commands are needed and so that I can program my own control software.

Of course there are also software tools that can do the job but not all of these tools shows the timing details as nice as the logic analyzer...

Ciao
Peter

-----Original Message-----
From: Tom Wiltshire [mailto:tom at electricdruid.net] 
Sent: Wednesday, March 30, 2011 11:57 AM
To: Dan Snazelle
Cc: Ullrich Peter; synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] Logicport

To add to what others have said, I always find debugging comms a right pain in the posterior. This is because it's rarely clear whether the problem lies at the sending end or the receiving end, so you finish up jumping back and forth between two different bits of code. If they're on different *types* of uP, it's even worse. I once had a PIC talking to a dsPIC - this entailed reprogramming the OS in my programmer each time I changed from one to the other.
A tool like this does away with all of this messing about by providing a solid external analysis. If the logic analyzer understands the messages as SPI, then you know the sender is working, and the problem is at the receiver end. If it doesn't, it can show you exactly what's going wrong with your SPI output. Makes life a whole pile simpler. Maybe for my next birthday...

T.

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