I have preliminary utility for Booting and Flashing DM355 from SD Card.
You can just boot Linux from SD card and install Linux on the flash.
As option you may totally erase the flash.

Usage:

1. download 5MB SD card image:

  wget http://www.linuxdriver.co.il/ti/dm355/dm355_boot.sdcard

2. put the image (CAREFULLY!) on your SD card connected to PC :

cat dm355_boot.sdcard > /dev/sd<your SD device>

3. Set SD card boot mode on DM355

Switch SW7: left - up, right - down.

4. Insert SD card to bottom (!)  SD card slot  J27

5. Power up

6. On welcome screen choose boot mode:
   1. boot from SD card without modifying the flash
   2. install UBL, U-boot, kernel and root FS regularly
   3. erase flash totally and #2

After installing (#2,#3) boot continues from the flash

6. Set Flash boot mode on DM355

Switch SW7: left and right - up.

7. Send me feedback to [email protected]

-- 
Constantine Shulyupin
Freelance Embedded Linux Engineer
054-4234440
http://www.linuxdriver.co.il/
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