Ethernet Communication on TIVA TM4C1294

Hello Rajesh

What protocol is being used on top of ethernet? Details elude the post.

Regards
Amit

Dear Sir,

                The protocol used is "MODBUS". I want to handle  the Modbus query  either  from Ethernet Port or  RS485 Port. I have successfully implemented  handling the query / response through RS485 but  want to implement the same through Ethernet Port. 

Regards,

Rajesh

Hello Rajesh,

Do you mean something like Serial to ethernet converter?

Regards
Amit

I need your suggestion on this. I have to receive the query from Ethernet Rx buffer, process the query and then dump the desired data to Ethernet Tx buffer .

Hello Rajesh,

Then I would suggest using Raw LwIP to do so. Please check lwIP site for documentation on calling Raw lwIP calls.

Regards
Amit

Dear Sir,

My Requirement is as follows:

There will be a PC with Ethernet port having an IP address. An application (Modbus Polling Software) running on the PC will poll the Cards connected in a network through Ethernet Switch. Each Card is having Ethernet port with configured IP Address . The PC will send a Modbus query to any CARD IP ADDRESSES. The TCP/IP protocol will send the data packets (query) to the respective IP Address. Then the respective CARD will decode its Device ID from the received Data packets (Query). The meter then process the requested data and send the data response through the Ethernet.

Please suggest.

Regards,

Rajesh

Hello Rajesh,

I think Serial to Ethernet TI Design would be the most apt place to start with. The Serial section of the design would need to be modified for ModBus.

Regards
Amit