Statically Allocated FreeRTOS Reference Project
IntroductionRTOS objects, such as tasks, queues, semaphores and software timers, can be created using automatically allocated RAM, or pre-allocated (statically allocated) RAM. The following pages provide more details:
The pros and cons of static and dynamic RTOS object creation
- The configSUPPORT_STATIC_ALLOCATION and configSUPPORT_DYNAMIC_ALLOCATION configuration constants.
This page documents a reference project that demonstrates FreeRTOS being used with configSUPPORT_DYNAMIC_ALLOCATION set to 0 – so with all the RTOS objects being created using pre-allocated (potentially statically allocated) RAM, and without building any of the FreeRTOS heap implementations. The reference uses the FreeRTOS Windows port, so it can be built and executed without the need for any specific embedded hardware.
Building the Reference Project
If you don’t already have it installed, download and install the
free community edition of Microsoft Visual Studio.
If you have not done so already, download
and unzip the official FreeRTOS distribution.
Start Visual Studio, then use the File|Open|Project/Solution menu item
to open the Win32.sln solution file, which is located in the
FreeRTOS/Demo/WIN32-MSVC-Static-Allocation-Only directory of the official FreeRTOS
Read the comments in main.c, before compiling and then
either debugging or running the application.
The output produced by the 100% statically allocated FreeRTOS reference project