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Re: [lwip-users] Ethernet package through SPI interface

From: address@hidden
Subject: Re: [lwip-users] Ethernet package through SPI interface
Date: Sun, 6 Mar 2016 18:09:57 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0


I'll have to add some more here:

Noam Weissman wrote:
The ETH PHY is connected from one side to the magnetics and from the other side 
it has a MAC interface.
LwIP or any other TCP stack need to read/or data to/from the MAC interface. 
This is the hardware driver that connects
the LwIP with the hardware.

These words might imply lwIP connects to RMII, but it doesn't. The interface between lwIP and the MAC can be a parallel bus (e.g. MAC included in the micro or external MAC connected to a memory-mapped bus), or a serial interface (e.g. SPI) or anything else. The MAC then converts to (R/G/whatever)-MII, followed by the PHY converting to the media.

I wrote this only to make it clear that lwIP does not in any way interface MII.


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