Re: [Libusb-devel] Using libusb with a USB SD Card reader.

[Xiaofan C. <xia...@gm...>]

On Mon, Oct 31, 2011 at 10:53 AM, Xiaofan Chen <xia...@gm...> wrote:
> On Tue, Oct 25, 2011 at 3:11 AM, Tim Roberts <ti...@pr...> wrote:
>> Eric Sepich wrote:
>>> Actually what I have been using is a program called F3 by Michelle
>>> Machado.
>>
>> I don't know what that is, and Google was not helpful.
>
> I am a Google Power User and I always find Google to be very
> helpful in most of the IT related stuff.

Forget the :-) sign.
I am a Google Power User. :-)
I consider myself a Windows power user (by helping others and
by using Google to find solutions) and Linux power user to a
lesser extent (thanks to Google as well). :-)

> It found this. The name is actually "Michel Machado".
> http://fixfakeflash.wordpress.com/2010/08/20/linux-h2testw-alternative-program-called-f3-by-michel%C2%A0machado/#more-253
>
> Then you can find what F3 is.
> http://oss.digirati.com.br/f3/
>
>>> The program works very well but I am having a very specific issue with
>>> thousands of SD cards that my client bought. Essentially I can not get
>>> any SD card readers to read the cards at all. I know it is a long shot
>>> but I was going to try to write some code at the hardware level to try
>>> to "wake the cards up" so to speak and make an attempt at formatting them.
>>
>> Are you aware there are several different kinds of SD cards?  An SD card
>> reader cannot access SDHC or SDXC cards, and no amount of software or
>> driver effort can every make it happen.  The hardware is simply not
>> compatible.
>>
>> It would be much more productive for you to get some electrical
>> engineering help to figure out where the problem lies.  Right now, what
>> you are proposing is nothing more than a shot in the dark.  There is
>> nothing you can achieve at a low level that the existing drivers are not
>> already doing.
>
> As a hardware engineer, I fully agree. :-) HW engineers need to be
> involved to make sure that hardware works fine first. Then you
> can talk about firmware and then software.
>




-- 
Xiaofan