Introduction - If you have any usage issues, please Google them yourself
M32 F1 General Purpose Timer TIM3 timer with the timer interrupt is controlled by the timer interrupt to control blinking DS1 using STM32 STM32F1 of TIM3 to generate to generate the PWM output. Use TIM3 channel 2, the channel, the channel 2 remap to remap to PB5, DS0 generate PWM to control the brightness.