STM32 - 定時器的設定 - 基礎- 09 - 編碼接口 - Encoder interface mode

To select Encoder Interface mode write SMS=‘001 in the TIMx_SMCR register if the counter is counting on TI2 edges only, SMS=010 if it is counting on TI1 edges only and SMS=011 if it is counting on bot

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