View source for Unbrick, fix NAND on the marsboard


=== Unbrick MarsBoard ===

Is it bricked?<br />
When writing update.img to nand RKBatchTool failes with following message: "Prepare IDB Fail" (or similar error messages like "IDB download failed" when writing to nand with other tools)<br />
MarsBoard have "bricked". It is not really bricked, the bootloader is corrupted at this time, you can always recover it.<br />
'''To recover it:'''<br />

# Turn off Power.
# Connect pin 8 and 9 on the nand with a needle and plug OTG USB cable in the PC.
# After Plugin remove needle connection. In RKBatchTool the square should now show up blue (if it isn't blue, retry).
# Click the restore button and upload an update.img

=== Hints ===
* Its useful to use a magnifying glass or (smartphone-)camera zoom to get the right pins.
* Always start counting pins on the edge of the chip where the small circle is molded in or printed on.

[[File:brick_nand_pin.jpg]]

=== Linux ===

    sudo upgrade_tool
    List of rockusb connected
    No found rockusb,Rescan press <R>,Quit press <Q>:r
    List of rockusb connected
    DevNo=1	Vid=0x2207,Pid=0x310b,LocationID=21f	   '''Maskrom'''
    Found 1 rockusb,Select input DevNo,Rescan press <R>,Quit press <Q>:1
    Rockusb>uf /tmp/LinuxUpgradeTool&RKBatchTool-MarsBoard_RK3066_HDMI_boot_from_sdcard_rootfs_v1.1.img
    Loading firmware...

If you see '''Maskrom'''(Normally it's Loader), that means you have successfully short cut the nand flash.