On Tue, 12 Oct 2010, Michael Hope wrote:

> Ah, I see.  You use the JTAG unit and on-chip debug hardware for the
> kernel and use the JTAG-supplied DCC connection for applications.  So
> you can use the DCC instead of Ethernet or serial, which is nice as it
> frees up a port.
> 
> You might want to ask linaro-...@lists about this and see if any of
> the kernel guys know about kernel support.  A quick poke about shows
> that you can send the kernel's printf() style debug messages through
> it but little else.

Some patches were posted by Daniel Walker recently to expose the DCC as 
a true Linux serial port, and not only a debug channel for early 
printk's as it is right now.


Nicolas

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