Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem


Creating FreeRTOS Architecture Diagrams

Posted by lyboka on July 24, 2014

I was wondering how other people create documentation supporting a FreeRTOS based application. So far I have been using Visio with some success--showing the flow of data between tasks with queues is simple enough. However once you start having semaphores and mutexes around it gets a little more complicated!

Does anyone have some good examples of a nice looking flow chart? What engineer doesn't love a great diagram?!?!?

Creating FreeRTOS Architecture Diagrams

Posted by richard_damon on July 24, 2014

I typically create one overall interaction diagram showing each "execution unit" (a Task, ISR, Timer Call back, or driver subroutine), each Hardware device, each major datastore, and each major queue/semaphore/mutex with arrow showing their interrelationships.

For example, if an ISR triggers a driver task with a semaphore, the Device symbol will point to the ISR with an interrupt arrow, the ISR to the semaphore, the semaphore to the driver task and the driver task to the device. The driver will also have any arrows needed to indicate what it does with the results from the device.

I then document the flow of each task individually (with links out representing these interactions).

[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]

Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

Meet us at Embedded World. Hall 3A-525.

Hear from Richard Barry at Embedded World. Feb 28, 16:00, Hall 4-428.

Video: Watch James Gosling & Richard Barry at re:Invent, Las Vegas 2017.

FreeRTOS kernel V10.0.1 is available for immediate download. Now MIT licensed.

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

OpenRTOS and SafeRTOS