[ipxe-devel] suggestion for improvement - USB Logging/Debug

Petry Roman, SHS-S IT-TS Roman.Petry at shsservices.org
Thu Nov 7 17:21:33 UTC 2013

Nice try to get such a device 8-)..
 if i understand the linux ehci gadget debug module rught, itwill make your normal linux pc to a compatible debug device..
 so just take your pc or raspberry pi and connect it via usb to the normal legacy pc you want to debug, and it should work..


-----Ursprüngliche Nachricht-----
Von: Michael Brown [mailto:mbrown at fensystems.co.uk] 
Gesendet: Donnerstag, 7. November 2013 17:12
An: Petry Roman, SHS-S IT-TS
Cc: ipxe-devel at lists.ipxe.org
Betreff: Re: [ipxe-devel] suggestion for improvement - USB Logging/Debug

On 06/11/13 15:47, Petry Roman, SHS-S IT-TS wrote:
> Hello, just a suggestion for a feature to implement: EHCI Debug Port
> As more and more pc´s are legacy free.. so no serial port for debuging,
>   this could be interesting,
> http://www.coreboot.org/EHCI_Debug_Port
> It is already used in the linux kernel and there is also a linux 
> module that acts as a debug monitor/device on the other side.
> https://www.kernel.org/doc/Documentation/x86/earlyprintk.txt and 
> http://www.coreboot.org/EHCI_Gadget_Debug

Sounds interesting and useful.  It looks as though the actual hardware is relatively expensive (~US$100 for a NET20DC).  If anyone wants to donate me one of these (or find me a cheaper supply), I'll happily implement this feature.


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