[En-Nut-Discussion] Nut OS reliable on AT91SAM7X Evaluation Board?

Marcus Jansson jansson.marcus at yahoo.se
Mon Nov 16 14:31:33 CET 2009

Ulrich Prinz wrote:
> I'd like to implement PDC/DMA for the network and the SPI channels. 
This can be done, the SPI seem to have a long list of errata associated with the PDC, though.

> If supported, I'd like to implement it for a background memcpy too.
I can not see how this can be done with the PDC, unless you're talking about a memcpy() to/from memories (possibly
eeproms) connected to the SPI or similar. Otherwise a hand optimized LDM/STM block copy loop instead of the existing
slow memcpy() might be in order for increasing memcpy() performance in internal RAM?

What was the reason for not having Thumb code in Nut/OS?


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