blinky-timers

Uses TIM1.

Tricks

• Using bypass clock at 8MHz coming from ST-Link board
• Configuring the correct Prescaler and Period values; They are off-by-1.
• TIM1 is on APB2, which is set to 216MHz
• PSC is 21600 and ARR is 10000, giving an interrupt every ~1s
• Useful stm32 timer formulas
• Remember to start the timer
• HAL_TIM_PeriodElapsedCallback is called just by naming convention after CubeMX NVIC configuration