How can I determine available RAM on Raspberry Pi Pico from a VScode C program?

Question

Is there any library function or other way for a VScode C program on a Pico to determine the RAM available to it? (other than attempting malloc()) I've reviewed the API documentation in the SDK and didn't find anything.

Answer 1

If there is not defined in SDK, you can calculate it manualy. The SRAM is 246 KB = 264 * 1024 * 8 bits(total logic memory). When you use malloc and free, use +/- a simple count and a getter function.