ʾʹõԴ
LPTIM1_IN1   ----- PB5
LED1             ----- PA4


ʾḶ́
1ϵϵͳʱΪRCH72
2LED1GPIOʼLED1ʼ״̬Ϩ𣬳ʼLPTIM1_INţ
3ʼLPTIM1LPTIM1ʱΪڲʱӣRCLʱΪⲿʱӣ
4NVICʼʹLPTIM1NVICжϲжȼ
5ʹLPTIM1Զƥжϣ
6MCUStopģʽ
7ʱLPTIM1_IN1ؼ1000ԶƥжϣMCU
8MCUѺLED1200ms˸
