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OMAP3530 EVM boot from SD Card

Gomathi Chandra Sekaran
Prodigy 10 points
Other Parts Discussed in Thread: OMAP3530

I'm a beginner. I'm using `OMAP3 EVM`. Currently, I'm able to boot via `NFS`. But, I want it to be from `SD card`. I removed the `boot.scr` file while changing it to SD boot. It was booting properly. But, after the line `'Uncompressing Linux...'` it waits for some time and then file system gets loaded directly and asks for login. The so many lines of initialization logs which used to come after the line `'Uncompressing Linux...'` are completely missing. But, the root file system is fully loaded and I'm able to use it as I did previously. So, I tried making the boot.scr file by removing the nfs related arguments alone.

The `boot.scr` commands previously,


setenv bootargs 'mem=128M console=ttyS0,115200n8 noinitrd rw rootfstype=ext3 ip=dhcp root=/dev/nfs nfsroot=192.168.15.3:/home/mistral/nfsroot,nolock'
setenv bootcmd 'mmc init; fatload mmc 0 0x80000000 uImage; bootm 0x80000000'
fatload mmc 0 0x80000000 uImage
bootm 0x80000000

The `boot.scr` commands now,


setenv bootcmd 'mmc init; fatload mmc 0 0x80000000 uImage; bootm 0x80000000'
fatload mmc 0 0x80000000 uImage
bootm 0x80000000

I haven't modified the `uEnv.txt`. It's contents are,

bootargs=console=ttyS0,115200n8 mem=256M root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait init=/linuxrc ip=off
bootcmd=mmc rescan ; fatload mmc 0 81000000 uImage ; bootm 81000000
uenvcmd=bootd

Now, it has completely stopped booting after the line `'Uncompressing Linux...'`.
Please guide me in where I'm going wrong.

  • 0
    TI__Guru 65405 points

    Hi Gomathi,

    As you are using OMAP3 EVM board you should have two SD cards in the board box which can be used for booting Android or Linux. Follow the sequence below for SD card booting:

    1. Power OFF the OMAP3530 EVM.
    2. Set the SW4 switch to boot from SD.
          · SW4 = 00100111 (high to low, i.e. SW4.1 = 1)
          · 1 = "On" position on the switch
    3. Insert the SD card into the OMAP3530 EVM.
    4. Power ON the EVM.

    If the booting is successful you can use the settings from the boot.scr file on the BOOT partition of the card.

    BR

    Tsvetolin Shulev