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

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

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.

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