libftdi Archives

Subject: Re: Hi, I've got a hardware/driver issue and I don't even know where to start (libftdi related, I promise).

From: John Oyler <john.oyler@xxxxxxxxxxxxxx>
To: libftdi@xxxxxxxxxxxxxxxxxxxxxxx
Date: Thu, 19 Aug 2010 14:40:03 -0500
Hi, it's been a little while since I've had a chance to tinker with this.

I've only been tweaking the example programs... I've switched the product id to 
match my device (6001 to 6010), and things work as examples should... but I 
can't say I can make much sense. I've since read over the docs, as best I can 
follow them, and I don't even know where to begin. Are there any plain C 
examples that show mpsse mode? I've checked over xc3sprog, but it's even more 
difficult for me to understand what's going on with it. It seems to make use of 
a mpsse_add_cmd() function that I can't even find in the documentation.

C's not really my strong suit, and I don't know where to start. If anyone has a 
better example of ftdi to spi, It would be much appreciated.

John O.

On Jul 14, 2010, at 3:31 PM, Uwe Bonnes wrote:

>>>>>> "John" == John Oyler <john.oyler@xxxxxxxxxxxxxx> writes:
>    John> I'm using a Semtech SX1211 radio chip, we use them in several of
>    John> our products.
>    John>
>    John> Semtech offers a development kit for this radio, that consists of
>    John> two USB devices. As it turns out, these USB devices would be ideal
>    John> for another application... but there are no linux drivers.
>    John> The entire device consists of little more than the SX1211
>    John> transceiver, and a FTDI 2232D USB<->serial chip.  From what I
>    John> gather, it's using the SPI (MPSSE) mode of the FTDI chip. Assuming
>    John> I know how to configure and use the radio chip itself, is libftdi
>    John> capable of talking to this chip?
>    John> Are there any examples that would be a good place to start?
>    John> Documentation seems sparse, and code examples aren't much more
>    John> common.
> What is your problem? Opening the FTDI chip, switching to MPSSE mode,
> setting the SPI parameters, sending SPI transfers, or what to transfer?
> Tell what you did, what you expect and what goes wrong and perhaps what you
> already googled about your problems.
> -- 
> Uwe Bonnes                bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
> --------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
> --
> libftdi - see for details.
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