Heap/Stack/RAM question

[git2212]

Are the values in __brkval and _estack reliable/accurate at runtime on this core?

Thx

[earlephilhower]

What are you trying to do with them? If you need the total free/used heap, check https://arduino-pico.readthedocs.io/en/latest/rp2040.html#memory-information

[git2212]

Already using the helper class ;)... under legacy Arduino, these two variables reliably give heap and stack info... was wondering if this was carried forward for the RP2040?

[earlephilhower]

We use Newlib's malloc implementation coupled with the Pico-SDK runtime which do not use those variables, sorry.

[git2212]

ok thanks.