libftdi Archives

Subject: RE: Issues with MPSSE on FT232H

From: "Michael Plante" <michael.plante@xxxxxxxxx>
To: <libftdi@xxxxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 20 Aug 2011 11:02:54 -0400
Damjan Marion wrote:
>> I tried to execute completely the same set of MPSSE instructions
>> with libft2xx and it works well on both devices. I think that this
>> proves that it is something wrong with libftdi and not with hardware
>>  or MPSSE code.

Are you using FTDI's official (closed-source) MPSSE code?  If so, then I
don't think it proves anything, since you'd have to rewrite that for
libftdi.  In any case, getting solid MPSSE code is less than trivial.  I
have some posts about it in the past for SPI.  Even if you did write your
own MPSSE code for use with d2xx, d2xx and libftdi are not drop-in
replacements for each other, so the problem could still be with the MPSSE
code.


>> BTW Another interesting issue is that I2C MPSSE works only
>> on INTERFACE_A on FT2232. When i change it to INTERFACE_B it fails....

Have you tried anything other than MPSSE on interface B?  It should be noted
that, at least on the C/D part, there is no MPSSE on interface B (see
datasheet).  Maybe some stuff still has to be ironed out now that two
interfaces support it on the H part?


Regards,
Michael


--
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
To unsubscribe send a mail to libftdi+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx   

Current Thread