Greg,

Sorry to hear you are having problems.  Yes, the SD Card are supposed to work out of the box. 

Please list the 102xxxx of the Development Kit and the 102xxxxx of the Linux SD Card in this forum post.  I will try to determine if this problem is isolated or not.

It is easy to restore the SD Card.  Follow the steps documented in the DM37x Linux SD Card Demo Image ReadMe.

On a Windows PC you can use the HP USB Disk Storage Format Tool instead of the Linux mkLogicFATcard.sh script.

Here is the link for the DM37x Linux SD Card Demo Image.

All these files are available on our DM37x Torpedo Product Webpage.

After recreating the Linux SD Card if you have trouble loading the going back and forth between Android and Linux you might need to erase the u-boot configuration block in NAND.  Here is the command below which needs to be executed on the DM37x target while in u-boot. 

OMAP Logic # nand erase.chip

NAND erase.chip: device 0 whole chip
Erasing at 0x1ffe0000 -- 100% complete.
OK
OMAP Logic #

Let us know if you have any trouble getting this working.

Thanks,

Brad

Thanks, Brad, for a quick response.  

We have purchased 2 Zoom Dev Kits from Digikey, and they both have the same issue with the Linux Demo Disks.   I booted into Logic Loader and mounted the Linux SD card using the command

"mount fatfs /dev/sdmmc0a /sd"

This mounts successfully, and the 5 files are present on the SD card, as described in the documentation.   Yet, LoLo complains that it cannot find u-boot.   The "U-BOOT.BIN" file is on the card.   I attempted to load it using LoLo "LOAD" command

"load bin u-boot.bin"

But this fails with the error message

"error: load: file is not in Microsoft NK.bin format (u-boot.bin)"

 Please advise,

Greg

The Dev Kit is # 1023989 Rev B, and the Linux SD card is # 1023978.

I have 2 dev kits that have the same Linux problem.

Greg,

The 1023978 is the SD Card from the Linux DM37x v2.4-2 (kernel 3.0.0) release. The Linux DM37x v1.0 (kernel 2.6.32) was the last release that supported loading from Logic Loader. The error message you provided expects the NK.bin from a WinCE 6.0 build.

I suspect if you copy the files to your host PC, reformat the SD Card with the HP USB 2.0.6 formatting tool and copy the files back (starting with the MLO file first) it will boot.

The Linux DM37x v2.x.x releases uses X-loader (named MLO) and then u-boot instead of Logic Loader as the bootloader.

Thanks,
Brad

I copied the 5 files to my local drive, and re-formatted the Linux Demo SD card, with the HP USB Formatting Tool (using a Windows PC).   Then I copied the "MLO" file back to the SD card, followed by the remaining 4 files.   It now loads u-boot and Linux and runs the demo !!!  

Everything is resolved.  Thanks for your help !