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How to use Free RTOS

Posted by vead on 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


How to use Free RTOS

Posted by dibosco on 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 > > ------------------------------------------------------------------------ > > Sent from sourceforge.net because you indicated interest in > https://sourceforge.net/p/freertos/discussion/382005/ > > To unsubscribe from further messages, please visit > https://sourceforge.net/auth/subscriptions/ >


How to use Free RTOS

Posted by rtel on 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


How to use Free RTOS

Posted by vead on 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.


How to use Free RTOS

Posted by rtel on 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.


How to use Free RTOS

Posted by vead on 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


How to use Free RTOS

Posted by dibosco on 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 > > ------------------------------------------------------------------------ > > Sent from sourceforge.net because you indicated interest in > https://sourceforge.net/p/freertos/discussion/382005/ > > To unsubscribe from further messages, please visit > https://sourceforge.net/auth/subscriptions/ >

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How to use Free RTOS

Posted by vead on 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


How to use Free RTOS

Posted by rtel on 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.


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