Serial Modbus protocol with SimpleLink MCU

albgarc2014

Hi TI!!

I need to use Modbus RS485 with a simplelink microcontroller. There are a library for serial modbus protocol available for simplelink microcontrollers?
Please, anything suggestion about the solution?

Thank you very mucch. Best Reagards.

over 5 years ago

0 IUsedToBeARealPerson (M-W) over 5 years ago

TI__Guru 58425 points

Hi A,

There is no such library that I'm aware of in the SimpleLink MCU family, the available drivers can be found in the SDK documentation:

https://dev.ti.com/tirex/explore/node?node=AOSQDVXMohlV5LElLx5wxA__pTTHBmu__LATEST

The MSP430 and MSP432 have the USCI peripheral that could be used to realize the RS485 part of it (and you could likely find a way to solve that on the RF parts of SimpleLink MCUs as well):

https://www.ti.com/lit/an/slaa722/slaa722.pdf?ts=1597644263777&ref_url=https%253A%252F%252Fwww.google.com%252F

The Modbus part you would likely need to implement the protocol side yourself, there is a few other threads on this in the forum that might help you create a clearer picture:

https://e2e.ti.com/support/interface/f/138/t/730490?Modbus-tcp-ip-protocol

https://e2e.ti.com/support/microcontrollers/msp430/f/166/t/506985?Interfacing-MODBUS-RTU-HMI-with-MSP432-Launchpad

There is also this open-source projects but they are not meant for commercial use:

https://github.com/FxDev/PetitModbus