How can we measure the amount of RAM consumed by a code in Arduino Due

Official Hardware Mega Due
1

I need to measure the amount of RAM used up by my code on Due. Can anybody tell me how to do it.
Thanks in advance. :slight_smile:

2

Have you got an answer yet.
There are ways to to do it with other Arduinos. Is it different than with DUE.

3

There are libraries/functions for the AVRs but I don't know if they have been ported to the SAM.

A quick and dirty way is to malloc() a single byte and get it's address, subtract that value from the max RAM address then subtract a fudge factor for the stack.

On LPCs you can get the SP as well and that's probably a option on the SAM, but you could also call a dummy function and get the address of a local variable to get an approx stack value. Or for that matter get the address of a local var in loop().

Rob

4

This seems to provide a good number on a Mega

void setup() {
  byte stack;
   
   long heap = (long)malloc(1);
   
   Serial.println ((long)&stack );
   Serial.println (heap);
   Serial.println ((long)&stack - heap);

}

No reason to believe it would not work on the Due.

Rob