Is there a tutorial or lecture series for beginners working with a STM32F3 demo board? I have programmed simple project boards like Arduino, but not anything like the STM32 boards. I have tried to work backwards from the provided demo, but I'm not familiar with terms like GPIO, __IO, BSRR, etc. I realize these terms are fairly standard for C programming, but I guess what I am looking for is a tutorial on C programming based around the STM32 product. My goal is to create a signal similar to a square wave in which each cycle has a unique, predefined period.