topic Any way to determine RAM usage at runtime? in Kinetis Design Studio

Any way to determine RAM usage at runtime?

mike1974 — Wed, 01 Apr 2015 00:01:56 GMT

Can the KDS debugger tell me RAM usage? I know that looking at the .map file could be helpful, but I'm allocating some stuff dynamically at runtime, and I would like to know how much I have left after doing so.

Re: Any way to determine RAM usage at runtime?

BlackNight — Wed, 01 Apr 2015 06:32:27 GMT

That depends on how you are allocating dynamically your objects. You would need a function from that heap management to tell you the amount of free heap. If you are usinig FreeRTOS, it will report it to you with heap size with xPortFreeHeapSize().

Re: Any way to determine RAM usage at runtime?

mike1974 — Wed, 01 Apr 2015 17:24:23 GMT

Thank you Erich.

By the way, I don't see a memory usage summary in the .map file. It seems I will have to extract it manually by searching/looking at each sections usage.

Do you know of a better way?

Re: Any way to determine RAM usage at runtime?

BlackNight — Thu, 02 Apr 2015 07:36:53 GMT

I report the code/data size with the 'size' utility at the end of the link phase, see

http://mcuoneclipse.com/2014/07/13/listing-code-and-data-size-for-each-source-file-with-gnu-and-eclipse/

Printing Code Size Information in Eclipse | MCU on Eclipse

Code Size Information with gcc for ARM/Kinetis | MCU on Eclipse

http://mcuoneclipse.com/2013/04/14/text-data-and-bss-code-and-data-size-explained/