[U-Boot] booting issue with Atmel SAMA5D31 Evaluation kit

[Bo Shen <voice.shen@atmel.com>]

Hi Ron,

On 12/16/2013 11:19 AM, Ron Eggler wrote:
>  > First, please check the console output, it should be BootROM.
>
>  > Second, which Linux distribution you are using? If use ubuntu 12.04, you
>
>  > can see a /dev/ttyACMx device, sam-ba will access this device.
>
> I'm using Kubuntu 13.10 and I connect to the serial port with
>
> "screen /dev/ttyACM0 115200"

I will try to make something clear.
On sama5d3xek board, there are two USB device connectors, one is J14 (on 
the right side, near JTAG connector) is used for console. The other is 
J20 (on the upper side, near USB host connector) is USB device port for 
sama5 SoC.

So, bootup information, include BootROM are come out from J14. When you 
try to flash using sam-ba, you should connect J20.

In summary, please take the following steps to re-flash:
1. power up the board.
2. connect J14 as console. (minicom, screen as you prefer)
3. combo key, to check whether BootROM come out from console.
4. connect J20, and check whether /dev/ttyACMx is accessible.
5. start sam-ba with root permission.

> but upon power cycle, nothing comes through, i.e. the screen is just
> black also, the kit came with an LCD screen, that a showed a little demo
> app but that's gone since the key combo Andreas had suggested and the
> screen just stays blank so I assume that the flash got completely erased...
>
> Any assistance to get that kit booting again is appreciated!
>
> Thanks,
>
> Ron
>

Best Regards,
Bo Shen