怎么计算ADC通过TIM1_CC4触发才触发时间

hyl88099

我现在有个代码，DMA部分是通过TIM1_CC4触发的，触发时间该怎么算
        TIM_DeInit(TIM1);

          /* Time Base configuration */
          TIM_TimeBaseStructure.TIM_Prescaler = 1-1;  .
          TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1;
          TIM_TimeBaseStructure.TIM_Period = (C_TM1CNT/C_TM1_CNT_DIV)-1;       
          TIM_TimeBaseStructure.TIM_ClockDivision = 0;  
          TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;  
          TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);



ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC4;       
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward;       
                                ADC_Init(ADC1, &ADC_InitStructure);


        DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
                                DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
                                DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
                                DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
                                DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
                                DMA_InitStructure.DMA_Priority = DMA_Priority_High;
                                DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
                                DMA_Init(DMA1_Channel1, &DMA_InitStructure);

Yveui

定时器溢出时间计算方法:Tout=((arr+1)*(psc+1))/Ft us. 不应该还是用这个么