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Excessive deferral deadlock
by Unknown on Feb 16, 2005 |
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Hello,
I've got a further question concerning the occurrence of an excessive deferral.
When generating such a condition (I just keep CSR='1' long enough for the
nibble counter to pass h17b7 while TX wants to send a frame), I noticed the
TX is not able to come back from the "StateDefer". I See that TxEthMac
drives TxAbort='1', however, this is filtered out within MacControl because
TxStartFrmIn='1' and with that, TxAbortOut is kept low. This causes the
host interface to wait forever to be able to send the frame and the TX to
stay in "StateDefer". Has anyone experienced such behaviour, too?
Regards,
Peter
By the way: Has anybody ever answered thread
[ethmac] DeferLatched signal
of the newsgroup (Sandhya Sastry, 14-Jun-2004), as I experience the same
thing and did not find additional comments to this threat?
========================================================================
Kaeser Peter
Senior Engineer
BridgeCo AG Direct +41 1 802 33 47
Ringstrasse 14 Phone +41 1 802 33 33
CH-8600 Duebendorf Fax +41 1 802 33 39
Switzerland mailto:peter.kaeser@bridgeco.net
http://www.bridgeco.net
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