有用STM32L系列的么？TIM2的CC2触发AD定时采样+DMA为什么调不通

hackthree

有用STM32L系列的么？TIM2的CC2触发AD定时采样+DMA为什么调不通？
初始化代码如下：

void ADC1_Sample_Configuration(void) 

{

        

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

        

  TIM_DeInit(TIM2);        

 /* ------------------- TIM2 Configuration:Output Compare Timing Mode ---------*/

        

  TIM_TimeBaseStructure.TIM_Period = 1199;

  TIM_TimeBaseStructure.TIM_Prescaler = 0;

  TIM_TimeBaseStructure.TIM_ClockDivision = 0;

  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  /* Output Compare Timing Mode configuration: Channel1 */

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;

  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

  TIM_OCInitStructure.TIM_Pulse = 100;

  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;//TIM输出比较极性低 

  TIM_OC2Init(TIM2, &TIM_OCInitStructure);

        

  TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable); 

  TIM_ARRPreloadConfig(TIM2, ENABLE); //使能或者失能TIMx在ARR上的自动装载寄存器 

  /* TIM2 enable counter */

  TIM_Cmd(TIM2, ENABLE);

        

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

  DMA_DeInit(DMA1_Channel1);//将DMA通道一设置为缺省值

  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_ADDRESS;

  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&AD_Sampling[0];//连接Memory中变量地址

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;//设置DMA为单向传输

  DMA_InitStructure.DMA_BufferSize = 100;//设置DMA缓冲区长度

  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//设置DMA的外设递增模式

  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//

  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;

  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//设置DMA的传输模式：连续不断的循环模式

  DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

  DMA_Init(DMA1_Channel1, &DMA_InitStructure);

  DMA_Cmd(DMA1_Channel1, ENABLE); // Enable DMA channel1

        

  RCC_HSICmd(ENABLE);

  /* Enable GPIOA clock */

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

  /* Configure PA.02 (ADC Channel2) in analog mode */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Check that HSI oscillator is ready */

  while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);

  /* Enable ADC1 clock */

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

  /* ADC1 configuration */

  ADC_InitStructure.ADC_ScanConvMode = DISABLE;

  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;

  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_RisingFalling;

  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC2;                 //定时器2的CC2触发

  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;

  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

  ADC_InitStructure.ADC_NbrOfConversion = 1;

  ADC_Init(ADC1, &ADC_InitStructure);

  /* ADC1 regular channel2 configuration */ 

  ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 1, ADC_SampleTime_4Cycles);

  /* Enable ADC1 */        

  ADC_DMACmd(ADC1, ENABLE);// Enable ADC1 DMA

  ADC_Cmd(ADC1, ENABLE);// Enable ADC1         

  /* Wait until the ADC1 is ready */

  while(ADC_GetFlagStatus(ADC1, ADC_FLAG_ADONS) == RESET)

  {

  }

          /* Start ADC1 Software Conversion */ 

  ADC_SoftwareStartConv(ADC1);

} 



AD_Sampling[100]的数组中始终都是0。
求指点。。

正点原子

没用过STM32L。。。不过应该和STM32差不多吧。

hackthree

回复【2楼】正点原子:
---------------------------------
寄存器和STM32F 的 有些差别，而且官方的库真蛋疼，就比如F系列的规则通道的外部触发有ADC_ExternalTrigConvCmd( ADC1, ENABLE);
L系列库直接就没有规则通道外部触发使能的函数，只有注入通道的。