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[lwip-users] freemodbus using lwip


From: Fred39
Subject: [lwip-users] freemodbus using lwip
Date: Mon, 20 Feb 2012 02:29:33 -0800 (PST)

Hi Guys

i am currently trying to use the LWIP stack for Freemodbus. There is a
downloadeable Demo Application at
http://freemodbus.berlios.de/index.php?idx=93 called lwip/MCF5235.
For my purpose i use this demo to implement my application using a
AT91RM9200. I have 2 major problems. Problem one is that in the demo
application there is no use of netconn api. Instead of this there is a
proting with the raw api. This means that only my modbus application can
receive data. But what when other applications send also data? Do i have to
use the netconn api for non blocking communication? I have more than 1
application for example one webserver and one freemodbus application and
more. When ever i receive data for the application the port of the
application should be connected. 
My other problem is according to this demo, by using the netif_add function
i will need a implementation of the AT91RM9200 Ethernet controller for
incoming data my knowledge about microcontroller programming is not so good,
how can i talk with the ethernet controller of my chip? i need to do some
initializations

Would be very nice to her some advices

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