[sdiy] PIC Baudrate Converter

[Gene Stopp]

wow somebody knows about Lone Wolf...

I was there... I was the hardware guy at Lone Wolf. Little shop in Redondo
beach. Neat technology but no concept of market positioning. I still have a
MidiTap in my setup. It may even have the MIDI-to-serial function in it, but
I wouldn't count on using for 31.25K to 38.4K conversions! No customer
support. :)

I think you may be able to get away with getting an old UART (was it 6402?)
and attaching the receiver to the transmitter, and hooking the framed
character received control to the send data control. The TX and RX sides can
be run on different clocks. Since the baud rates are so close, it may work.
The big problem would be 38.4K bytes coming in at less than one stop-bit
time on the 31.25 side. But, if the 38.4K data stream was originally sourced
by an identical setup on the other end, then since the bytes came from
31.25K in the first place, they should be spaced that far apart.

Of course all of this goes out the window if this is going across a wide
area link with buffers. Which it sounds to me like is the case?

Best Regards,

- Gene


-----Original Message-----
From: cyborgzero at comcast.net [mailto:cyborgzero at comcast.net]
Sent: Monday, May 06, 2002 3:07 PM
To: Synth-DIY
Subject: Re: [sdiy] PIC Baudrate Converter


Well, if you are going to try to speed up the midi rate, why not go
all out and go up beyond that, to, say, maybe 100k or so?

I remember there was a thing called the Lone Wolf that not only sped
up the xfer but used fiber optics between the modules for long midi
runs...

Rob

----- Original Message -----
From: "Laurie Biddulph" <boobies at ozemail.com.au>
To: "Synth-DIY" <synth-diy at dropmix.xs4all.nl>
Sent: Monday, May 06, 2002 7:59 AM
Subject: [sdiy] PIC Baudrate Converter


Hi,
Does anyone have code for a MIDI Baudrate converter? I need two
modules:-

1) MIDI (31250) to RS232 (38600), and
2) RS232 (38600) to MIDI (31250)

I will, obviously use two chips for the functions as they will need to
run simultaneously.

Best Regards
(Mr) Laurie Biddulph
http://www.ozemail.com.au/~boobies

Tel: +61 2 4340 1525
Fax: +61 2 4340 0936