TIM_CCMR_CC2S
#define TIM_CCMR_MASK (TIM_CCMR_CC1S | TIM_CCMR_CC2S | \
{ TIM_CCMR1, TIM_CCMR_CC2S, TIM_CCMR_CC2S_TI2,
TIM_CCMR_CC1S | TIM_CCMR_CC2S, pwm->hwpwm & 0x1 ?