等精度采样后在DMA中的数据怎么提取出来

只看该作者 · 2010-1-20 11:00

AD设置（）

  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;  //独立转换
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;  //单通道
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //单次转换
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1; //定时触发
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //数据右对齐
  ADC_InitStructure.ADC_NbrOfChannel = 1;  //转换通道数
  ADC_Init(ADC1, &ADC_InitStructure);

  /* ADC1 regular channel14 configuration */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 1, ADC_SampleTime_239Cycles5);
  /* Set injected sequencer length */
  ADC_InjectedSequencerLengthConfig(ADC1, 1);
  /* ADC1 injected channel Configuration */
  ADC_InjectedChannelConfig(ADC1, ADC_Channel_11, 1, ADC_SampleTime_71Cycles5);
  /* ADC1 injected external trigger configuration */
  ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_None);
  /* Enable automatic injected conversion start after regular one */
  ADC_AutoInjectedConvCmd(ADC1, ENABLE);
  /* Enable ADC1 DMA */
  ADC_DMACmd(ADC1, ENABLE);
  /* Enable ADC1 external trigger */
  ADC_ExternalTrigConvCmd(ADC1, ENABLE);
  /* Enable JEOC interupt */
  ADC_ITConfig(ADC1, ADC_IT_JEOC, ENABLE);
  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE);
  /* Enable ADC1 reset calibaration register */
  ADC_ResetCalibration(ADC1);
  /* Check the end of ADC1 reset calibration register */
  while(ADC_GetResetCalibrationStatus(ADC1));
  /* Start ADC1 calibaration */
  ADC_StartCalibration(ADC1);
  /* Check the end of ADC1 calibration */
  while(ADC_GetCalibrationStatus(ADC1));

定时器设置
  /* Time Base configuration */
  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_TimeBaseStructure.TIM_Period = 0xFF;  //定时值
  TIM_TimeBaseStructure.TIM_Prescaler = 0x4; //分频系数
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //时间分割值
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //向上计数
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
  /* TIM1 channel1 configuration in PWM mode */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 0x7F;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  TIM_OC1Init(TIM1, &TIM_OCInitStructure);