Radxa Brick - not detected by PC

[paolo....@gmail.com]

Hi all!

After some days of playing with radxa, something went horribly wrong with a firmware update.

I changed firmware a lot of times, but this time it's impossible for any PC to correctly access the board via OTG port.

I have 3 "flashing environments": 

1 - a VM with windows XP (running on my Mac)

2 - a VM with linux (running on my Mac)

3 - a real PC with windows 7 64bit

I can confirm that I successfully flashed firmware in past with all these environments. 

In fact I'm still using all of the 3 to flash another RR board (and other RK3188 boards too).

Due to this, I can exclude hardware connection problems or power problems.

Now the RR is likely-bricked: 

- I can't see the device with any flashing tool

- via serial console I see only an infinite sequence of "?"

- when I plug the usb OTG (pressing the recovery button) I can see the RR-device appearing in Device Manager, but it'll go away after some seconds

I'm running out if ideas... Google suddenly came out with this: http://www.slatedroid.com/topic/74465-tut-momo8-recoverybrickeddead/

The link above describes a method to put the CPU in Bootloader mode or in Maskrom mode, by shorting two pins on the NAND chips.

I'm still not sure about this procedure. Can anyone confirm that it's working?

Thanks

[Alvaro F R Santos]

http://wiki.radxa.com/Rock/unbrick

It worked to me!

[paolo....@gmail.com]

no luck... (tried both vith XP VM and the real PC)

[Yao Wang]

How about to replace one high quality usb cable? But before that make sure the radxa rock is powered by DC(5V/2A)

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radxa rock - quad core arm computer that rocks

radxa.com

[paolo....@gmail.com]

as I stated before, I can confirm that the cable is working. I can flash another RR with that cable.

I always follow this procedure http://wiki.radxa.com/Rock/recovery_mode for flashing and I usually connect the OTG cable only.

If you think it's mandatory, I can try with even bigger (stabilized) power supplies (always 5V, I can reach 10A).

I'm not sure this is the way to go.

[Tom Cubie]

Hi, Paolo

I think to find out the problem you need to use the linux vm. Power
off the board, shotcut the nand flash pin as described in
wiki.radxa.com/rock/unbrick, plug in the otg cable and your mac. A
prompt should come up and ask mac or linux you want to connect this
device. Choose linux, then run lsusb under linux. If you see
2207:310b, then it is. You can now run sudo upgrade_tool uf
/path/to/update.img

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[paolo....@gmail.com]

Il giorno sabato 15 marzo 2014 05:55:55 UTC+1, Tom Cubie ha scritto:

A prompt should come up and ask mac or linux you want to connect this
device. Choose linux, then run lsusb under linux. If you see
2207:310b, then it is. You can now run sudo upgrade_tool uf
/path/to/update.img

 Thanks for the answer.

I just tried with both the linux VM and a real (spare) PC with linux.

On both of them, when I connect the OTG cable, I can only see a message like this:

    [ 188.847729] hub 1-0:1.0: unable to enumerate USB device on port 1

I changed the USB cable, but the results are the same.

[Tom Cubie]

This is strange. You can try alternative method to flash the NAND flash.
http://wiki.radxa.com/Rock/SD_upgrading

[paolo....@gmail.com]

Whoa!!!

This one worked very well....

Problem solved! Thanks Tom!

[the...@gmail.com]

thanks it worked for me too.

[Sambhu R]

can anyone here answer this please?? https://groups.google.com/forum/#!topic/radxa/GfDYbVKtpxU

sorry for posting this offtopic here but we have trying this since last week still no hope of enabling uart1... As of of now only uart 0 and uart 3 are enabled we need uart1 enabled, please help....