[Q] tty serial console

[WoOsH]

Hi all,

I have searched high and low for an answer to this but cannot find a definitive answer so thought I would post it here.

does the xoom have or can we get access to the tegra serial debugging port or a serial console?

do we have any technical schematics for the xoom mainboard?

does the xoom have nvflash mode? if so is it open or is an SBK required?

I am really interested in getting serial console output of u-boot and early kernel boot stage. I have already tried to enable debug_ll and earlyprintk etc etc then output using a usb to serial cable but this only becomes available when usb device drivers are loaded which is reasonably late in the kernel init process.

currently the kernel config suggests the fiq debugger is run on uart-b I wonder if this uart-b is accessible on the mainboard or through the micro-usb/headphone port by creating a cable or setting a gpio as on the nexus one or attrix respectively.

thanks for any and all responses.

 

[okantomi]

Hi all,

I have searched high and low for an answer to this but cannot find a definitive answer so thought I would post it here.

does the xoom have or can we get access to the tegra serial debugging port or a serial console?

do we have any technical schematics for the xoom mainboard?

does the xoom have nvflash mode? if so is it open or is an SBK required?

I am really interested in getting serial console output of u-boot and early kernel boot stage. I have already tried to enable debug_ll and earlyprintk etc etc then output using a usb to serial cable but this only becomes available when usb device drivers are loaded which is reasonably late in the kernel init process.

currently the kernel config suggests the fiq debugger is run on uart-b I wonder if this uart-b is accessible on the mainboard or through the micro-usb/headphone port by creating a cable or setting a gpio as on the nexus one or attrix respectively.

thanks for any and all responses.

Have you already checked bigrushdog's thread in Development: Tegra Hardware and Feature Implementation http://forum.xda-developers.com/showthread.php?t=1513490

bigrushdog is the person to talk to imo.

 

[WoOsH]

thanks will post in that thread now.

 

[bigrushdog]

I'm gonna refer this to my good friend kcrudup who is a hardware guru

 

[WoOsH]

I'm gonna refer this to my good friend kcrudup who is a hardware guru

Thanks very much.

 

[kcrudup]

Unfortunately, as I have neither Xoom schematics, nor even the Tegra 2 TRM (NVidia never got back to me on my application, either ) I'm utterly unable to help you with this.

 

[WoOsH]

Thanks anyway.