Hi everyone, I created an HID bootloader for the STM32G4xxx, it works and now I am trying to optimize the size. After compiling I can read this on the Build Analyzer a flash memory usage of 17.85 kB.
After compiling I get this:
When I flash this compiled code and read the flash memory I canclearly see that the memory usage is around 38 kB.
I also used the STM32CubeProgrammer to look at the actual memory (I didn't manage to use this function directly on STM32CubeIDE) and I can see that more than 38 kB are used in the memory
Can somebody explain why? Am I missing something about the Build Analyzer function?
What's programmed into Flash is more than just the code - there's also all the data initialisation values.
The Build Analyser shows you exactly what's going into the Flash, and where:
Everything in the 'Load address' column is stored in Flash
.text is your executable code; some of the other things are mentioned here:
https://stackoverflow.com/questions/15265295/understanding-the-libc-init-array
Sure, here it is
@Simo_Sappo wrote:
So you have 16.88KB of code, and a total of just 1092 bytes of extras.
That's pretty insignificant - only ~6% - so what are you worrying about?
My problem is that the code I am actually flashing in the microcontroller is 38.37 kB, which I confirmed by also opening the flash memory with STM32CubeProgrammer. I don't understand why I am flashing a file that is double the size of my actual code.
