Why FreeRTOS example given for "ek-tm4c123gxl" uses around 30KB of RAM?

Chandresh Patel

Other Parts Discussed in Thread: EK-TM4C123GXL

Right now i am working with FreeRTOS on Tiva C series launchpad. I am just in beginning and the application code is not that much large but i have noticed that ZI data is about to cross 32KB. Than i simply compiled example FreeRTOS project given by TI and it also uses around 30KB. Why it uses so much RAM? And is there any way to reduce it? I am using keil with ARMCC compiler.

over 9 years ago

0 BB_ over 9 years ago

Intellectual 300 points

FreeRTOSConfig.h:

#define configTOTAL_HEAP_SIZE               ( ( size_t ) ( 30000 ) )

I haven't looked at the application but it almost certainly doesn't require such a large heap.

0 Chandresh Patel over 9 years ago in reply to BB_

Prodigy 30 points

Thank you very much. I came to know that allocated heap size will be considered as used memory and it was the reason behind "memory full error". My application doesn't require that much heap size so i have reduced it and now everything is fine.

0 FreeRTOS.org over 9 years ago in reply to Chandresh Patel

Intellectual 890 points

See http://www.freertos.org/a00111.html - there are functions that allow you to query the heap to see how much is free, so you can tune it to the requirements of your application. Also FreeRTOS V9.0.0 allows you to create objects without the heap: www.freertos.org/FreeRTOS-V9.html

0 Yuva raj over 9 years ago in reply to FreeRTOS.org

Expert 1045 points

I am new to RTOS concept if any one give a sample program to run without compilation error better to understand. I using TM4CGH6PM Lanuch pad.

Thanks in advance

Yuvaraj

0 Chandresh Patel over 9 years ago in reply to Yuva raj

Prodigy 30 points

Download Tiva C-series software from TI website www.ti.com/.../sw-ek-tm4c123gxl. In the sub-directory "TivaWare_C_Series-2.1.2.111\examples\boards\ek-tm4c123gxl\", you will find "Freertos_demo" folder. Compile this project with ARMCC compiler and you can directly load it onto your board. It is basic LED, switch demo project.

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Why FreeRTOS example given for "ek-tm4c123gxl" uses around 30KB of RAM?