各位STM32F4怎么用定时器触发ADC采样TIM_Period = 15624;TIM_Prescaler = 35;这样设置保证精确的每秒128次比较周期,即72000000÷(35+1)÷(15624+1)=128;然后在ADC中设置:ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC2;ADC_ExternalTrigConvCmd(ADC1, ENABLE);