topic Using an SD Card for Data Storage in i.MX Processors

Using an SD Card for Data Storage

myke_predko — Wed, 02 May 2012 18:53:42 GMT

Hey,

I'm running with an i.MX233 with Linux ltib 2.6.31 and I was wondering if anybody has had any success with mounting a FAT formatted SD Card (2GBytes or less for the drivers).

The purpsose is to provide bulk storage to the application that can be shared with a Windows system.

When I look around, I see a lot of suggestions for using "mmcblock0", but that is not an entry in my system's /dev. When I've tried the other "mtd" devs using

mount /dev/mtd# /mnt/sd

mount -t ext3 /dev/mtd# /mnt/sd

Where "mtd#" is mtd0-mtd4 and mtdblock0-mtdblock4, I get Invalid Format errors except for mtdblock4 which provides a mighty upchuck.

Any ideas?

Thanx,

myke

Re: Using an SD Card for Data Storage

rogerio_silva — Fri, 04 May 2012 16:00:06 GMT

Hi Mike,

You can check if your kernel has FAT support enabled on kernel menuconfig.

Rgds

Rogerio

Re: Using an SD Card for Data Storage

myke_predko — Sat, 05 May 2012 14:51:25 GMT

Hi Rogerio,

Thank you for the reply.

It turns out that the version of linux created by ltib for the i.MX233 disables the SD Card Drivers after boot so you cannot access an SD Card device except when booting to either run from the SD card or to load the Flash from it.

So, unless I'm willing to do some serious hacking on the image, it's not available.

myke