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Altera_Forum
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14 years ago

TSE "small MAC" isn't asserting fifo_rx_dsav signal for min size Eth frames

I have a "Small MAC" instantiation of the TSE for a 100 Mbit link. It appears that it isn't asserting the fifo_rx_dsav signal for small messages. When we try to ping our DUT (device under test) fro...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

yes, minimum frame size is 64 bytes. yes, there is an option to forward or drop the CRC, and I've ran both configurations (currently leaving the CRC in tact and forwarding on user).

The only other signals I can find are RX FIFO "almost empty" and "almost full" flags. I tried to use the almost empty flag at one point, but it gave my state machine problems. I'm currently trying to find a way to make this work, but I'd really like to know why the intended signal usage (ff_rx_dsav) isn't working as advertised. I'd hate to use a "hack" fix long term.