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Altera_Forum
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15 years ago

Fixing smsc91c111 to 10Base-T.

I've built a prototype board which includes the Cyclone III + smsc91c111 ethernet chips. Under Quartus-II version 9.0 + Nios II + muCOS-II + smsc91c111, the auto-negotiation fails during initia...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi Mhori,

Search IP device drivers for the file smsc_phy.c.

You'll find the s91_phy_init() function which performs auto negotiation.

With minor changes you can:

- skip auto-negotiation

- ignore negotiation errors

- force the link speed

In the first two cases you must ensure your system can restart auto-negotiation when needed.

Cris