Determining RAM size at Runtime?

[LMore.5]

There's the Flash Size Register in the Device electronic signature.

Is there an equivalent for the onboard SRAM size? Any way to get the ACTUAL SRAM size at runtime?

[Tesla DeLorean]

Yes some STM32 have a register describe the RAM size.

Where they don't you can either use the FLASH size as a guide, or read the Device ID from one of the DBGMCU registers

As I recall there used to be package information in the UNIQUE ID, but I'm not sure how current that its or if it is well/openly documented.

I've use Device ID to determine CPU/BUS speeds within the F4 family

Cache sizes, and core sub-components can be fished out of the ROM TABLEs

[TDK]

> Is there an equivalent for the onboard SRAM size?

No, unfortunately.

> Any way to get the ACTUAL SRAM size at runtime?

Here's an ugly hack:

https://stackoverflow.com/questions/23411824/determining-arm-cortex-m3-ram-size-at-run-time