![]() ![]() This part is more or less required b/c your chip needs to communicate to the outside world in one way or another (even if it's crunching pi, you'll need to somehow display the result). These are different between vendors, so this part is not portable. The STM32F4xx DSP and Standard Peripherals Library : This provides the libraries for accessing the peripherals provided by STM. ![]() All these instructions are standard across ARM chips, so naturally this interface is also standard and portable. It allows the developer to omit writing the assembly by hand and to stay in the C/C++ world. Simple things like "where is the stack pointer?", "add these two numbers", "get a value from this memory address". If you look at some of the files you'll see that the functions simply map to one or two lines of ARM assembly. In essence this is a header only library.
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