FT2232: Anybody using MPSSE and the other channel

[Uwe Bonnes]

Hello,

I am hitting a wall with the FTDI FT2232. I want to use the first channel in
MPSSE mode and the second channel in Bitbang mode.

First problem: I don't find anything in the D2XX docs about how to talk to
the second channel.

Second problem: Trying with libftdi on Linux, as soon as I have the
command active, that I think should get the second channel into bitbang
mode, the MPSSE machine on the first channel goes astray. After emitting
some commands to the MPSSE machine, I expect to be able to read two
bytes. This is the case with BITBANG mode on the second channel not
set. When I have set BITBANG mode the other channel, the read buffer is full
(0x1000 bytes available) in the same situation.

Has anybody used the FT2232 successfull in a similar situation?

Thanks

--
Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

 

[Rob Young]

"Uwe Bonnes" <bon@elektron.ikp.physik.tu-darmstadt.de> wrote in message
news:cs2rfl$4qe$1@lnx107.hrz.tu-darmstadt.de...

Hello,

I am hitting a wall with the FTDI FT2232. I want to use the first channel
in
MPSSE mode and the second channel in Bitbang mode.

First problem: I don't find anything in the D2XX docs about how to talk to
the second channel.

Second problem: Trying with libftdi on Linux, as soon as I have the
command active, that I think should get the second channel into bitbang
mode, the MPSSE machine on the first channel goes astray. After emitting
some commands to the MPSSE machine, I expect to be able to read two
bytes. This is the case with BITBANG mode on the second channel not
set. When I have set BITBANG mode the other channel, the read buffer is
full
(0x1000 bytes available) in the same situation.

Has anybody used the FT2232 successfull in a similar situation?

Thanks

--
Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

www.dlpdesign.com has at least one product using the FT2232 and I think Don
Powrie has written an article about the FT2232. He usually puts links to
his articles on his company page. Maybe he might be able to help you.

Rob Young
rwyoung@ieee.removethis.org