A) purpose: basic PWM input also called capture, and interrupt cooperate to apply. Before using a chapter of the output tube feet PB1 (19 feet), direct use of jump line join input PA3 (13 feet), configuration for the TIM2_CH4, the experiment. B) for simple PWM input application, temporarily without thinking about the difference between the TIM1 advanced features, according to current my application target in fact only need to collect high level width, which do not need to know the cycle, so not using PWM input mode, but ordinary pulse width capture mode.

The STM32 TIM programming.doc

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