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Modbus TCP and RTU, Master and Slave for STM32 using Cube HAL and FreeRTOS

License: GNU Lesser General Public License v2.1

C 82.38% Jupyter Notebook 17.62%

modbus-stm32-hal-freertos's Introduction

Hi there 👋

Embedded Programming is my passion

Still sticking with C (liking function pointer arrays) in micro-controllers.

My favorite PC language is Go

Why?

Go is open source, sponsored, professionally developed and used by Google.
Go is a multi-purpose language.
- It supports graphics not directly but GUI frameworks are around.
Go is object oriented.
- Go uses composition instead of inheritance - programs get cleaner this way.
In Go interfaces are implicit - they need no explicit declaration.
- This allows clean and simple APIs in your code without unneeded dependencies.
Go is easy to learn, to use and gives quick programming success.
Go is a compiled language, therefore checks a lot before building the code.
- You get most errors at compile-time and not at run-time as with scripting languages (like Python). The Go compiler itself is fast. It allows script like usage of Go as well.
- The Go program execution is fast.
  - Could be about half speed of a well written C program - not relevant for normal use cases. To get an equivalent "well written C programm" takes much longer than getting the Go program for a specific task.
Go is a managed language making memory leaks impossible.
- No explicit memory allocation and free.
Go supports slices, a very light array management struct.
Go has pointers but no pointer arithmetic, making code more reliable this way.
Go is designed to use multi-core machines and single-core ones and allows easy multi-threading and inter-process communication.
- Concurrent programming using Go rotines and channels allow efficient program structures.
- Parallel execution allows to use the full multicore power of modern systems easyly.
- Concurrency is not Parallelism by Rob Pike
The auto-formatting as languge part is very comfortable.
- This allows a bunch of helper tools.
A testing environment comes with the language. Fuzzying is supported.
- Simply create my_test.go files inside your Go package and run go test ./... in the project root.
You get a stand-alone runnable without libraries dependencies.
- No missing library anymore.
- No install ... before running an executable.
Many platforms are supprted, also mobile development.
Go has an integrated documentation System.
- Just add comments to your functions.
Easy Visibility control: Packages export UppercaseFunction and hide lowerCaseFunction.
Go can use C/C++-code and vice versa, but crossing the border takes time, so avoid that in loops.
- CGO
- SWIG
Compatibility: Legacy Go code runs on new Go versions.
Go has generics now.

Disadvantages?

Not made for small microcontrollers.
- BUT: There is TinyGo.
Not well suited for fast hard real-time applications on sub-millisecond level because of the stop-the-world garbage collector.
- BUT: The GC gets better and better with new Go versions AND avoiding that Go uses the heap heavily, avoids GC at all.