[N32G45x] 定时器级联应用之周期门控

TIM_TimeBaseStructure.Period    = 255;

    TIM_TimeBaseStructure.Prescaler = 0;

    TIM_TimeBaseStructure.ClkDiv    = 0;

    TIM_TimeBaseStructure.CntMode   = TIM_CNT_MODE_UP;



    TIM_InitTimeBase(TIM2, &TIM_TimeBaseStructure);



    TIM_TimeBaseStructure.Period = 3;

    TIM_InitTimeBase(TIM3, &TIM_TimeBaseStructure);



    TIM_TimeBaseStructure.Period = 3;

    TIM_InitTimeBase(TIM4, &TIM_TimeBaseStructure);



    /* Master Configuration in PWM1 Mode */

    TIM_OCInitStructure.OcMode      = TIM_OCMODE_PWM1;

    TIM_OCInitStructure.OutputState = TIM_OUTPUT_STATE_ENABLE;

    TIM_OCInitStructure.Pulse       = 64;

    TIM_OCInitStructure.OcPolarity  = TIM_OC_POLARITY_HIGH;



    TIM_InitOc1(TIM2, &TIM_OCInitStructure);



    /* Select the Master Slave Mode */

    TIM_SelectMasterSlaveMode(TIM2, TIM_MASTER_SLAVE_MODE_ENABLE);



    /* Master Mode selection */

    TIM_SelectOutputTrig(TIM2, TIM_TRGO_SRC_UPDATE);



    /* Slaves Configuration: PWM1 Mode */

    TIM_OCInitStructure.OcMode      = TIM_OCMODE_PWM1;

    TIM_OCInitStructure.OutputState = TIM_OUTPUT_STATE_ENABLE;

    TIM_OCInitStructure.Pulse       = 1;



    TIM_InitOc1(TIM3, &TIM_OCInitStructure);



    TIM_InitOc1(TIM4, &TIM_OCInitStructure);



    /* Slave Mode selection: TIM3 */

    TIM_SelectSlaveMode(TIM3, TIM_SLAVE_MODE_GATED);

    TIM_SelectInputTrig(TIM3, TIM_TRIG_SEL_IN_TR1);



    /* Select the Master Slave Mode */

    TIM_SelectMasterSlaveMode(TIM3, TIM_MASTER_SLAVE_MODE_ENABLE);



    /* Master Mode selection: TIM3 */

    TIM_SelectOutputTrig(TIM3, TIM_TRGO_SRC_UPDATE);



    /* Slave Mode selection: TIM4 */

    TIM_SelectSlaveMode(TIM4, TIM_SLAVE_MODE_GATED);

    TIM_SelectInputTrig(TIM4, TIM_TRIG_SEL_IN_TR2);



    /* TIM enable counter */

    TIM_Enable(TIM3, ENABLE);

    TIM_Enable(TIM2, ENABLE);

    TIM_Enable(TIM4, ENABLE);