![]() We’ll just include IoAbstraction.h, this does not include SwitchInput or TaskManager,īut what we notice immediately is all the globals defined for both are immediately included.Īnd here’s an excerpt of the compiler output: Compiling library "IoAbstraction" Let’s take a look by generating a simple sketch that includes io-abstraction library.īut does not use any of its capabilities. So this means every global variable in a library is included immediately, The AVR compiler for Arduino does not seem to do this. Normally, at this point unused globals are usually disposed of, but from what I’ve seen In the linking phase, all of the compiled code is ’linked’, by this we mean that any external functions or variables defined Then, in order to create an embedded package of these Library gets included, every source file in the library is compiled. In the Arduino environment, libraries are included in the sketch by including a header file from the library. ![]() How Arduino sketches and libraries are compiled Then I recommend reading that first, as it sets the background for this article. ![]() If you’ve not read static memory analysis for Arduino - part 1 Lastly we discuss the memory usage of Wire and how to reduce it. Memory environment of the ATMega328 (Arduino Uno). Some things are not quite as clear cut as may be initially thought, especially in the very low ![]() In part 2 of this series we discuss how sketches compile on Arduino, along with the cost of using the virtual keyword toĬreate virtual classes. ![]()
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