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Altera_Forum's avatar
Altera_Forum
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12 years ago

Need help to make Triple Speed Mac's avalon-MM interface work.

In my now doing project, a altera Tse mac without sopc/os is used, I wanna to use only the Tse with udp/ip stack in a very fast image grab application. Basic hardware is Cyclone III + 88E1111(GMII...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Find the problem, seems waitrequest is by default '1', don't confused by that, you can write to/read from the mac control register and then wait for waitrequest '0' (1 clk pulse )to indicate that write/read done, then do the next write/read.

The ug says waitrequest means "Register interface busy", I don't think it is exactly, easy to let me think of "busy". maybe directly "Register wait for request" is better.