Posted on May 17, 2011 at 13:59I found the problem! I'd forgotten to enable the Clock AFIO //Resolution: replace line: RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE); By RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_AFIO, ENAB...