I’ve found a quite enlightening tutorial here
http://hertaville.com/2012/07/28/stm32f0-gpio-tutorial-part-1/
http://hertaville.com/2012/09/01/understanding-the-stm32f0′s-gpio-part-2/
I’ve found a quite enlightening tutorial here
http://hertaville.com/2012/07/28/stm32f0-gpio-tutorial-part-1/
http://hertaville.com/2012/09/01/understanding-the-stm32f0′s-gpio-part-2/