Faster analogread and floating point calculations on STM32?

[lonesometraveler (Kentaro Okuda)]

@brianmarshall

I also tried this on mbed studio and everything was significantly significantly slower

Maybe Online compiler uses the release profile and Studio uses the debug profile or something. I am pretty sure you can change the compiler optimization settings with Studio. You just modify json files and specify which one to use.

https://os.mbed.com/docs/mbed-os/v6.0/program-setup/build-profiles-and-rules.html

Here is an example of how optimization can make a difference.

SPI clock frequency (with ST7735 lib) on MBED os v5

I cannot say anything specific about Mbed Studio or VSCode. (I don’t use them.) But, with CLI, we use mbed build profiles to set optimization levels (and others). I guess you can do that on Studio too. The same code doesn’t mean it always performs the same. You have to compile your code to run it on your target. The actual performance (and code size) depends on the compiler and optimization level. Here is my little experiment for you. The same code, the same OS (5.15.1), the same microcontro…