How to use Free RTOS

vead wrote on Thursday, July 20, 2017:

Hello everyone
I am looking help on Free RTOS. I have been reading some materials and have been reading book but still I am having problem to understand basic of RTOS. so I have decided to start with small project. I know RTOS is mainly design for Time based reuirenment. just for practice why not start with LED. I know how to blink LED with C program. Now I want to blink LED under Free RTOS. I understand I don’t need rtos to blink LED but it is just for practice so that I can understand at least which header and source file of Free RTOS I can use to Blink LED. once I blink LED under control of RTOS. after that I will do come complex projcet. so please help me

dibosco wrote on Thursday, July 20, 2017:

The best way I think to do this is to look through the projects that are
available to download, find one that uses your IDE then buy a dev board
to go with that project.

Once you have that, compile and run the demo project and write a very
simple thread that toggles an LED. If you’ve done any sort of reading,
you’ll have found plenty of tutorials on creating a thread, using task
delays etc.

In essence, the way I look at it is that a thread is like a
run-to-complete infinite loop style piece of software you’re used to
writing for micros. You can write a number of threads that can run
[seemingly] concurrently and communicate with each other.

Once you have your LED flashing you can do things like write a thread
that gathers serial information then pass it via a queue to another
thread that processes that information. You’ll then soon get the hang of
how it all works and do some real world stuff.

On 20/07/17 16:41, vead wrote:

Hello everyone
I am looking help on Free RTOS. I have been reading some materials and
have been reading book but still I am having problem to understand basic
of RTOS. so I have decided to start with small project. I know RTOS is
mainly design for Time based reuirenment. just for practice why not
start with LED. I know how to blink LED with C program. Now I want to
blink LED under Free RTOS. I understand I don’t need rtos to blink LED
but it is just for practice so that I can understand at least which
header and source file of Free RTOS I can use to Blink LED. once I blink
LED under control of RTOS. after that I will do come complex projcet. so
please help me


How to use Free RTOS
https://sourceforge.net/p/freertos/discussion/382005/thread/402f7442/?limit=25#0d1e


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rtel wrote on Thursday, July 20, 2017:

If you have been reading the official book (free pdf download), or the
API documentation for the functions that show you exactly what you are
asking (http://www.freertos.org/a00127.html), then its hard to add
anything additional. You can look at examples though. Here is a really
old file that just flashes LEDs at different rates. It is included in
most of the examples in the FreeRTOS download, if you have looked at
those too:

https://sourceforge.net/p/freertos/code/HEAD/tree/trunk/FreeRTOS/Demo/Common/Minimal/flash.c

Or using software timers

https://sourceforge.net/p/freertos/code/HEAD/tree/trunk/FreeRTOS/Demo/Common/Minimal/flash_timer.c

vead wrote on Friday, July 21, 2017:

Thanks for your reply I have downloaded some projects and books. I have gone through given links but my confusen is on selection of header files and sources
suppose I want to flesh three LEDs at different rate. first LED flashes every 200ms, the second every 400ms, the third every 600ms. how many header files and source files I need in program. can you tell me the name of header files and source files.

rtel wrote on Friday, July 21, 2017:

Open an existing project to see, or better still read the online documentation or book chapter that tells you how to create a new project, including which files to build and which include paths to add.

vead wrote on Friday, July 21, 2017:

as said I have been reading book and looking some project examples but I don’t understand the idea which files I need to add and built in program. may be my poor understanding. I am not asking for complete program. I am stuck at starting for selection of free RTOS files. I don’t know why you didn’t give the answer of my question for LEDs. if possible can you give me the name of files which I have to add and build in program so that I can go for further learning

dibosco wrote on Friday, July 21, 2017:

You don’t need anything else if you download the source code and use
one of the demo projects, This is why we’re saying get a demo project.

The download instructions are here.

http://www.freertos.org/a00104.html

Choose one for your IDE and compile it. It will just work. No extra
files needed. This is the beauty of starting with a demo project.

On 21/07/17 14:50, vead wrote:

as said I have been reading book and looking some project examples but
I don’t understand the idea which files I need to add and built in
program. may be my poor understanding. I am not asking for complete
program. I am stuck at starting for selection of free RTOS files. I
don’t know why you didn’t give the answer of my question for LEDs. if
possible can you give me the name of files which I have to add and
build in program so that I can go for further learning


How to use Free RTOS
https://sourceforge.net/p/freertos/discussion/382005/thread/402f7442/?limit=25#221e


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vead wrote on Friday, July 21, 2017:

I don’t know how to explain. ok I am using cortex M3 and keil compiler and I have downloaded some project. now If I don’t want use demo projcet I want to mak my own project (flesh Three LEDs at different rate ) than How to do it

rtel wrote on Friday, July 21, 2017:

as said I have been reading book and looking some project examples
but I don’t understand the idea which files I need to add and built
in program.

…and I referenced this page, which tells you, as does the book:
http://www.freertos.org/Creating-a-new-FreeRTOS-project.html

I don’t know why you didn’t give the answer of my question for
LEDs.

…and I referenced this page, which is an LED flashing example, and
told you which file in the FreeRTOS download contains more examples:
http://www.freertos.org/a00127.html

if possible can you give me the name of files which I have to
add and build in program so that I can go for further learning

I don’t think I could do more than reference the pages that provide
answers to your questions, other than cut and paste content from those
pages into the forum.