[sdiy] OT? MIDI to RS232 converter box?

[sleepy_dog at gmx.de]

 > other baud rates and/or USB virtual serial would be fine

wouldn't just any ft232 or so based little board off ebay do, if you 
tack on a buffer, opto isolator or what ever is needed?

If different baud rates do work, then why not us such a virtual COM port 
thing and
operate it at the exact MIDI baud rate - no byte FIFO'ing in between needed.

I think even the cheaper ft232 do support to set that baud rate (I'm 
sure I did that), up).
There are even some fractional parts that can be added to an integer 
divider to set the baud rate,
but for 31250, it would be integer divider of 1536 from 48 MHz clock:
http://www.ftdichip.com/Support/Documents/AppNotes/AN232B-05_BaudRates.pdf

But not every other of those virtual com chips do. E.g. the cp2103 does 
*not* (just looked it up, can only do certain fixed standard baud rates)

This plus the very manageable mentioned external electronics?
https://www.ebay.com/itm/FT232-USB-UART-Board-Type-A-FT232R-to-RS232-RS485-Serial-Converter-Module-Kit/261119068830

- Steve



Am 20.01.2018 um 19:30 schrieb MTG:
> I'm looking to BUY a "simple" converter box that takes 5-pin DIN MIDI 
> at one end and on the other true DB-9 serial (at say 38.4kbaud). So 
> this would entail a microcontroller with a couple of circular buffers 
> and 2 UARTs. NOT just a level-shifter-to-current-loop thing.
>
> I don't really want to build it from scratch if I don't have to. I 
> don't want any other intelligence, but other baud rates and/or USB 
> virtual serial would be fine. All I can see online is a $600 box and a 
> bunch of etch-your-own board PIC kits. Oh and some DMX ones, but not 
> sure about them.
>
> Reason: to run an old EPROM monitor in an old synth. The monitor 
> utilizes the existing physical layer of 5-pin DIN MIDI, but on the 
> host side the monitor is operated via a COM Port Terminal program like 
> TeraTerm.
>
> I would have thought there were at least some old half-baked solutions 
> for people that didn't want to pony up the big bucks for a MPU-401.
>
>
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