>From the schematics that FTDI provides it looks like there are no pullups or
pulldowns on those lines, maybe the FPGA itself has some internal pullups/downs.
However, as you noticed, everything seems to work with the libftd2xx.
The only reason I am working on this is that I noticed that the DEV_RST is set
high, when I do nothing to the B port. So all I am trying to accomplish is
setting this one line to 0. Any functionality that can do this would work for
me, I just thought BITBANG would be the easiest.
Jo
On 7/26/2011 4:28 AM, Uwe Bonnes wrote:
>>>>>> "Joachim" == Joachim Schambach <jschamba@xxxxxxxxxxxxxxxxxx> writes:
> Joachim> Hi, I have a question about the usage of the ftdi_set_bitmode
> Joachim> function. I am using a development board from FTDI called
> Joachim> MorphIC-II to evaluate the usage of the FT2232HQ chip. This
> ...
> Joachim> I am trying to use BITBANG mode to port B to set the DEV_RST
> Joachim> line to 0, while leaving the other pins alone (by setting them
> Joachim> as inputs). I have been able to do this with the libftd2xx
>
> What are you trying to achieve? What other function should the FT2232H do,
> either seqential or simultanious? Why can't you use MPSSE to set the PINs?
>
> Otherwise, are there appropriate pull-up/downs to keep the input lines from
> floating? But as it works with ftd2xx, there should be.
>
> In the next weeks I don't have time to investigate further...
>
> Bye
>
--
Dr Joachim Schambach tel: x1 512 471 1303
The University of Texas at Austin fax: x1 814 295 5111
Department of Physics email: jschamba@xxxxxxxxxxxxxxxxxx
1 University Station C1600
Austin, Texas 78712-0264, USA
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