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

From: marcus
Subject: Re: [lwip-users] Ethernet package through SPI interface
Date: Mon, 29 Feb 2016 23:46:19 -0700 (MST)

Hi Sir :


I am very sorry to bother you again!


There is someone tells me that You can create a virtual network interface, a virtual netif, to bridge SPI data to lwIP protocol stack.


I have searched Ethernet, but I do not get useful information.


Do you have any idea, example or document that shows how to create a virtual network?


Please give me your suggestion.


Best regards,



From: Sergio R. Caprile [via lwIP] [mailto:ml-node+[hidden email]]
Sent: Wednesday, January 27, 2016 7:49 PM
Subject: Re: Ethernet package through SPI interface


You do need a netif anyway
You will write a driver for your SPI chip.
If your chip outputs Ethernet frames, it is in no way different from
other connection options (parallel, on chip)
If your chip outputs IP datatagrams, you'll have to enter the stack on a
higher level function, and I can't help you here.
If your chip outputs data for a TCP/IP 'socket', you don't need lwIP.

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