STM32F103: "Program too big. The size is 77872 bytes (of a 65536 byte maximum)."

Projects Programming
1

I loaded the STM32 usb-bootloader, and ran the blink application with success for the first time tonight. So now I want to make a real program. I chose to try and compile this sBus test example (remote control receiver) library found here:

sBus library

I select the same board-type as I did with the blink-test, and POOF! ERROR PROGRAM TOO BIG!

So, I have a long list of problems that probably has something to do with converting this example from arduino 8-bit to stm32? Not sure why it is using 70k of memory.

I am actually compiling in Visual Studio, using the Visual Micro extension. Maybe there is a function in this library that does not translate correctly ? the .h and .cpp is only like 300 or 400 lines of code. Project compiles without issue on Arduino328 nano board with plenty of memory to spare. STM32 has -- what, twice or 4 times as much memory ?!?!?

I was wondering if anyone had advice, please. How do I get a read-out or trace of WHAT was compiled, and the memory usage - where it went, what functions are using and declaring memory ?

2

Wait a minute... Ok, looks like for reasons unknown, the tutorial I was following tell me compile board "GENERIC STM32F103C SERIES". I poke around and find reference to "MAPLE MINI" looks like the same $2.00 board I have on some web pages, and other pages it is different. Then this hidden detail:

Most STM32F103C8T6 processors actually seem to have 128k Flash, like the STM32F103CBT6

Wiki reference

So, I select "MAPLE MINI" from the drop-down board list, and the program compiles - uploads and runs. !?!?!? I thought the compiler checked the board it was connected before uploading to verify it was compatible? I guess not - I suppose it would let me compile anything and upload it to anything. Confused.