Associate II

Question

RAM and CPU Usage on STM32F779I at Runtime

Posted on January 11, 2018 at 14:55

Hi I want to asses the resources used by my program while run time. As My project requirement is to asses the resources used by the my application.

Can any one help me How do I can find these resources usage run time .

#stm32f779i #ram-usage

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Senior III

Posted on January 11, 2018 at 15:04

Try to ******.

Or a static analysis of your compiler, and/or runtime analysis via debugger.

Associate II

Posted on January 11, 2018 at 16:14

What about without debugger ? I want to display both the resources usage by my application

Guru

Posted on January 11, 2018 at 16:15

CPU utilization is the time you don't spend in the idle loop. Use a free running TIM to see how much time you spend there.

For memory, walk the heap to see how much of the memory arena you are using, and check the maximal depth of the stack.

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Senior III

Posted on January 11, 2018 at 16:20

Good debuggers support an easy read-out of cycle count registers.

Whatever that might be useful for.

And there is the old-fashioned way for load measurement.

Set a GPIO high whenever your application is actually busy, and watch with a scope.

Works well with a cyclical approach.

Some RTOSes already do this for you.

Associate II

Posted on January 11, 2018 at 18:34

Hi , I am using FreeRTOS , How can I measure the RAM utillization and CPU utilization with by my appllication with FreeRTOS support.

Is there any API to find it.

Senior III

Posted on January 13, 2018 at 12:07

As I remember, the documentation of FreeRTOS is 'un-free' (as in 'free beer'), i.e. one has to pay for.

Perhaps you find appropriate examples.

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