[U-Boot-Users] SMSC91C111 performance...

Richard Klingler richard.klingler at violasystems.com
Thu Feb 26 19:22:35 CET 2004


> > What is the performance of the driver inside u-boot?
> >
> >
> > Get around up to 2 secs delay to "ping alive" and
> 
> Yes, the SMSC91C111 has an very long auto-negotation cycle...
> 
> > downloading a 2.5MByte binary with tftp takes up to 7 secs.
> 
> Wow, about 3 MBit -- that's good for the Chip. The SMSC91C111 self
isn't 
> fast enough. It has an non performant chip design (there are only 
> 2x2KByte 
> for FIFO). My latest tests with an PXA255 a/o NIOS + SMSC91C111 @ 32
bit 
> bus 
> results the same...
> 

Seems also tftp download is corrupting some packets...at least
uclinux for BF533 always ends in panic...but not with same
image loaded through VisualDSP...

Maybe should test first with loads (o;


rick





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