Choosing an OS for uC

[shaiko]

What is the most widely used hard RTOS for microcontrollers today?

 

[udayan92]

hard RTOS

No idea what that means..but one of the prominent RTOS for microcontrollers is VxWorks.Read this..
https://www.embedded.com/design/operating-systems/4425751/Comparing-microcontroller-real-time-operating-systems

 

[Ishaan Karnik]

No idea what that means

Hard RTOS mean the one that gives timing and execution guarantee. A hard real-time operating system has less jitter.

What is the most widely used hard RTOS for microcontrollers today?

It depends on your application. There is no such single fixed winner.

 

[shaiko]

I don't think VxWorks (or any of the other listed OS in the link) is a good choise. It's designed for more complex CPU applications and is probably an overkill for uC...

 

[horace1]

have a look at the linux pages
**broken link removed**
https://www.embedded.com/design/connectivity/4023328/Real-Time-Linux

and eLinux
https://elinux.org/Main_Page

you need to start with a requirements specification - you then select a suitable combination of microcontroller/software to satisfy the requirements
it is probably a good idea is to double the requiements as the end user has usually forgotten or not thought about many of the details that require extra IO, memoty, power, etc that appear as you implement a prototype

 

[embpic]

Hard RTOS depends on your controller. because controller is only have to work after all. if controller is 16-bit and higher can work better.
i think FreeRTOS is good option.