Re: gEDA-user: complete project sample?

[Eric Brombaugh <ebrombaugh1@xxxxxxx>]

On Apr 11, 2010, at 2:59 AM, Stephan Boettcher wrote:

> John Luciani <jluciani@xxxxxxxxx> writes:
> 
>> On Sat, Apr 10, 2010 at 6:58 PM, DJ Delorie <dj@xxxxxxxxxxx> wrote:
>>> 
>>>> I can think of a few uses for your USB GPIO pod!-Patrick
>>> 
>>> I use it mostly for testing out new components.  I have added a
>>> micro-sd module for it, and most recently it's wired up to a new
>>> ethernet chip from micrel.
>> 
>> Do you have uSD code working? I have tried a couple
>> of different cards and have had no luck getting them working on
>> the SPI port. I looked at the timing of the CS, MOSI and SCK.
>> All look good but I don't get a response on the MISO line.
>> I have looked at the spec and I believe I am sending the proper
>> command bytes. Any info would be appreciated.
> 
> microSD are not required to support the SPI protocol.  Do they usually
> do?  What brands?

Interesting. I've tried a half-dozen different brands and haven't had any trouble with SPI support. Sandisk, Kingston, PQI, no-name from Deal Extreme, etc. If you're interested though, it seems that brand-name doesn't mean much. Even some of the big sellers are often re-branded from whatever's cheapest in China this week:

http://www.bunniestudios.com/blog/?page_id=1022

Eric


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