Ctrl+A DEL the C++ #1: what is struct memory-alignment?

As part of my participation in the UMD Racing Formula Student team, I have been writing the embedded software for the low-voltage class of PCBs that are powered with STM32 MCUs. For the architecture design, we have opted to go for a framework-style of software that is completely written in C. One of the sub-projects this framework should accommodate is a testbench that is basically just an STM32F7…