Hi. Can you tell me which level of optimalization I have to choose i Keil ARM? I'm working whith STM32F103. In WinAVR I allways had -Os (speed) but what i Keil ARM?
I write only simple programmes
Set optimization to Low or None. This will make debugging easier. This will also protect you from optimization level dependent bugs in your code. When you gain enough experience to not have to ask such a question, you can raise optimization level. Good luck!