TMDSCNCD28388D: Establishing Modbus TCP communication between a computer and the DSP

Renan Santos Adriano

Mastermind 19435 points

Part Number: TMDSCNCD28388D
Other Parts Discussed in Thread: C2000WARE

Hello Team,

Posting on behalf of my customer:

I was trying to write a code for Establishing Modbus TCP communication between a computer and the DSP(TMDSCNCD28388D) using the LWIP stack that exists in the Ethernet examples in the C2000_VMWARE. But can you give me any directions or any example code that can solve my problem? I am struck by this problem for quite some time and would be much obliged if you can help me in this regard. Also, what changes are to be made in the Ethernet Source code file so that the Computer can act as a Modbus Server and the DSP(Delfino) can act as a Modbus Client? Are there any existing libraries with the TI that supports the Modbus-Tcp Microcontroller Units? I am new to this Dsp so might be having some trivial questions. I already know that there is an Existing GitHub library by Bruno Louis that supports the Modbus Serial Communication protocol. But right now I am interested in working on or developing a Modbus-TCP code using the LWIP stack. I would be much obliged if someone can help me in this regard.

Regards,

Renan

over 1 year ago

0 Siddharth Deshpande over 1 year ago

TI__Mastermind 33875 points

Renan,

TI has not investigated, built examples, or have experience with the Modbus protocol. However there is a LWIP TCP/IP stack based webserver example

You can find the project here <C2000Ware>\libraries\communications\Ethernet\third_party\lwip\examples\enet_lwip\cm\ and follow the steps in the readme.txt in the project to get started. There is an interface layer f2838xif.c which interfaces the Network stack with Ethernet IP. You may want to look into this and try to update it based on your Modbus requirement.

Also, you can take a look at his link - https://www.programmersought.com/article/59761635631/

Best Regards

Siddharth

0 Renan Santos Adriano over 1 year ago in reply to Siddharth Deshpande

TI__Mastermind 19435 points

Hello Siddharth,

Please see my customer response below:

Thank you experts can you give me a guidance or source of Modbus developed on some other Microcontroller which can be used for a reference to port the code from the other platform to MCUs of the TI C2000 family specifically the F28388D.

I need to develop a simple Modbus with one Server and 1-2 clients with the clients being the F28388D for the time being.

I would be much obliged if they can help me in this regard.

Regards,

Renan

0 Siddharth Deshpande over 1 year ago in reply to Renan Santos Adriano

TI__Mastermind 33875 points

Renan,

The following TI-Design could be a good starting point on Modbus: www.ti.com/.../TIDA-00226

It also provides firmware that can be used for reference.

Best Regards

Siddharth

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMDSCNCD28388D: Establishing Modbus TCP communication between a computer and the DSP