自带的10位ADC进行信号的数据采集

1万 · 2015-3-11 22:05

我现在需要用MSP430F5310 单片机自带的10位ADC进行信号的数据采集，要求是每秒需要采集1000个点的，可不可以实现，并且是怎样实现？求助大家了啊，能给出代码及解释的最好的

2万 · 2015-3-11 22:06

每秒需要采集1000个点。
应该不难，才相当于 1k采样率。可以用定时器定时触发，然后转换结束读数即可。

1万 · 2015-3-11 22:06

LZ，我现在用的芯片的MSP430F147，这个芯片的AD模块的12位的，要利用芯片自带的AD转换模块进行AD转换是很方便的，只需要对这个模块里面涉及的几个寄存器进行设置就可以了，并利用定时器产生1/1k的中断，在中断服务程序中进行处理转换后的数字量即可，不复杂的。

2万 · 2015-3-11 22:07

找个例程看看知道基本原理就会了

只看该作者 · 2015-3-11 22:08

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
__IO uint16_t  ADC1ConvertedValue = 0, ADC1ConvertedVoltage = 0;
__IO uint16_t RegularConvData_Tab[4];

void ADC1_DMA_Config(void)
{
  ADC_InitTypeDef    ADC_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;
  DMA_InitTypeDef DMA_InitStructure;
  /* ADC1 DeInit */
  ADC_DeInit(ADC1);

  /* GPIOC Periph clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);

/* ADC1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

  /* DMA1 clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);

  /* Configure ADC Channel11 as analog input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* DMA1 Channel1 Config */
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RegularConvData_Tab;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = 4;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  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;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);
  /* DMA1 Channel1 enable */
  DMA_Cmd(DMA1_Channel1, ENABLE);

  /* ADC DMA request in circular mode */
  ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);

  /* Enable ADC_DMA */
  ADC_DMACmd(ADC1, ENABLE);

  /* Initialize ADC structure */
  ADC_StructInit(&ADC_InitStructure);

  /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits  */
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward;
  ADC_Init(ADC1, &ADC_InitStructure);

  /* Convert the ADC1 Channel 1 with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_55_5Cycles);

  /* Convert the ADC1 temperature sensor  with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_TempSensor , ADC_SampleTime_55_5Cycles);
  ADC_TempSensorCmd(ENABLE);

  /* Convert the ADC1 Vref  with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_Vrefint , ADC_SampleTime_55_5Cycles);
  ADC_VrefintCmd(ENABLE);

  /* Convert the ADC1 Vbat with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_Vbat , ADC_SampleTime_55_5Cycles);
  ADC_VbatCmd(ENABLE);

  /* ADC Calibration */
  ADC_GetCalibrationFactor(ADC1);

  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE);

  /* Wait the ADCEN falg */
  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));

  /* ADC1 regular Software Start Conv */
  ADC_StartOfConversion(ADC1);
}