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Altera_Forum's avatar
Altera_Forum
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9 years ago

Marvell 88EE1111 PHY tranciever MDIO reg configuration

I'm trying to troubleshoot PHY for my dual Ethernet design on the DE2-115 Cyclone IV board. (I have to load my *.elf file twice for some reason for my design to work). In trying to figure ou...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Indeed - my mistake. I found only the product brief shipped with the kit.

Going back to your original issue - does your code allow the Phy time to 'settle' before trying to configure it? By the time you re-load the elf it's been running for a number of seconds. Are you simply trying to do 'something' too early?

Do you write to address 20 in your code? Comment it out if so. I doubt it's relevant. I remember not having to do any configuration to get the Phy working.

Cheers,

Alex