uC/OS-II LWIP pbuf_free fail

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originally posted by stepozzi@Nov 29 2005, 06:32 PM

i have the same problem, but i'm using lwip version 1.1.0, distributed with nioside/quartus 5.01 release.

so i think the problem has not been solved with the patch mentioned by wlrm04 (admitted they found a patch).

anybody knows how to solve this problem?

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We found it!

This is not a problem of the lwIp stack, but a problem in the nios ii data cache controller.

Yes, the data cache manager has a bug and Altera is working on it.

Under some unlucky circumstances (and the function pbuf_header has this "unlucky" sequence of instructions) the wrong location of RAM is written.

I think this will be fixed in the next release (or patch) of Quartus II.