Forum: Mikrocontroller und Digitale Elektronik MODBUS TCP implementation on PIC32


von Bender (Gast)


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Hello,
I would like to implement MODBUS TCP on a PIC32. I am using the 
Microchip TCP/IP Stack and looking for some C- Source Code. My 
development board is the Explorer 16 from Microchip with a 
PIC32MX360F512L and an ENC26J60 Ethernet Pictail, so the implementation 
should be possible. The plan is to control the PIC from a PC (for 
example via Labview).
If anyone has experience with Modbus or has other information please let 
me know.
Every comment is welcome.

Thank you!

von Zdenek R. (zdenek)


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Hello,
I make Modbus RTU slave for PI32 via UART. My development hardware is 
PIC32 Demoboard. Microchip TCP stack is very good, stable, but too big. 
For data transfer with PC is necessary Modbus TCP server. Beta version 
will be ready cca end of January 2010.
Zdenek

von Bender (Gast)


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Thank you for your help.
If the Microchip TCP/IP stack is too big what else would you recommend?
Happy new year.
Bender

von Zdenek R. (zdenek)


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No no ... TCP stack ist big, but stable. Would crasy writing new TCP 
stack. Is impemented in LabView Modbus RTU via serial line ? If yes, I 
send my Modbus RTU library via UART. It´s temporary solutoins, before 
first version of Modbus TCP.

von Bender (Gast)


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Yes, there is an ModBus serial (RTU,ASCII) and an ModdBus TCP 
implementation in LabView.

von Bender (Gast)


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If you are doing an ModBus RTU slave on PIC32, you could be interrested 
in this:

http://www.opensourcepic.org/modbus.php

Its a Modbus RTU and ASCII implementation on freemodbus.
But there is no TCP, so it does not help me.

I hope it helps you.

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