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Altera_Forum's avatar
Altera_Forum
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14 years ago

waitrequest stuck high on simple avalon master

I have recently switched from sopc builder to qsys and am having problems with some of my own components that include avalon masters. I'm using a very simple avalon master (not pipelined). Wha...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

The master behavior has well to be changed on that case when migrating from SOPC to QSys to avoid the deadlock:

SOPC Builder to Qsys Migration Guidelines :

--- Quote Start ---

Avalon-MM wait-request Signal

If your Avalon-MM master component is configured to wait until the wait-request

signal is deasserted before starting a transaction, the transaction may become

deadlocked. You must configure your component to start transactions independent of

the status of the wait-request signal.

--- Quote End ---

http://www.altera.com/literature/an/an632.pdf