ADC+DMA采集并传输完成后的中断问题-第2页回答

ADC+DMA采集并传输完成后的中断问题

2019-07-14 15:55发布

现在需要单路AD连续采集2048个数据存入数组并通过DMA传输至存储器并进行FFT变换，AD采集和FFT变换两个分开的部分已经可以了，但是加在一起的话就不知道数据采集和传输是怎样的一个顺序了，AD采集到的电压值是正确的，但是传递到fft的输入就完全变了，这是什么原因呢，下面附下我的配置函数，希望知道的朋友帮帮忙看下，谢谢！（文字复制过来就乱码了，不过应该不影响看懂程序吧）#include "bsp_adc.h"
#include "ARM_math.h"

__IO uint16_t ADC_ConvertedValue[2048];

static void ADC_GPIO_Config(void)
{
            GPIO_InitTypeDef GPIO_InitStructure;

      // Ê¹ÄÜ GPIO Ê±ÖÓ
      RCC_AHB1PeriphClockCmd(RHEOSTAT_ADC_GPIO_CLK, ENABLE);

      // ÅäÖÃ IO
      GPIO_InitStructure.GPIO_Pin = RHEOSTAT_ADC_GPIO_PIN;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ; //²»ÉÏÀ²»ÏÂÀ
      GPIO_Init(RHEOSTAT_ADC_GPIO_PORT, &GPIO_InitStructure);
}

void NVIC_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Enable the DMA2_Stream0 gloabal Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = DMA_IRQ;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

static void ADC_Mode_Config(void)
{
      DMA_InitTypeDef DMA_InitStructure;
      ADC_InitTypeDef ADC_InitStructure;
  ADC_CommonInitTypeDef ADC_CommonInitStructure;


  // ------------------DMA Init ½á¹¹Ìå²ÎÊý ³õÊ¼»¯--------------------------

  RCC_AHB1PeriphClockCmd(RHEOSTAT_ADC_DMA_CLK, ENABLE);

  DMA_InitStructure.DMA_Channel = RHEOSTAT_ADC_DMA_CHANNEL;
      // ÍâÉè»ùÖ·Îª£ºADC Êý¾Ý¼Ä´æÆ÷µØÖ·
      DMA_InitStructure.DMA_PeripheralBaseAddr = RHEOSTAT_ADC_DR_ADDR;
  // ´æ´¢Æ÷µØÖ·£¬Êµ¼ÊÉÏ¾ÍÊÇÒ»¸öÄÚ²¿SRAMµÄ±äÁ¿
      DMA_InitStructure.DMA_Memory0BaseAddr = (u32)&ADC_ConvertedValue;
  // Êý¾Ý´«Êä·½ÏòÎªÍâÉèµ½´æ´¢Æ÷
      DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
      // »º³åÇø´óÐ¡Îª£¬Ö¸Ò»´Î´«ÊäµÄÊý¾ÝÁ¿£¨Ò»´Î´«ÊäÍê³É¼´½øÈëÖÐ¶Ï£©
      DMA_InitStructure.DMA_BufferSize = 2048;
      // ÍâÉè¼Ä´æÆ÷Ö»ÓÐÒ»¸ö£¬µØÖ·²»ÓÃµÝÔö
      DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  // ´æ´¢Æ÷µØÖ·¹Ì¶¨
      DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  // // ÍâÉèÊý¾Ý´óÐ¡Îª°ë×Ö£¬¼´Á½¸ö×Ö½Ú
      DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  //       ´æ´¢Æ÷Êý¾Ý´óÐ¡Ò²Îª°ë×Ö£¬¸úÍâÉèÊý¾Ý´óÐ¡ÏàÍ¬
      DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
      // Ñ»·´«ÊäÄ£Ê½
      DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  // DMA ´«ÊäÍ¨µÀÓÅÏÈ¼¶Îª¸ß£¬µ±Ê¹ÓÃÒ»¸öDMAÍ¨µÀÊ±£¬ÓÅÏÈ¼¶ÉèÖÃ²»Ó°Ïì
      DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  // ½ûÖ¹DMA FIFO       £¬Ê¹ÓÃÖ±Á¬Ä£Ê½
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
  // FIFO ´óÐ¡£¬FIFOÄ£Ê½½ûÖ¹Ê±£¬Õâ¸ö²»ÓÃÅäÖÃ
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  //³õÊ¼»¯DMAÁ÷£¬Á÷Ïàµ±ÓÚÒ»¸ö´óµÄ¹ÜµÀ£¬¹ÜµÀÀïÃæÓÐºÜ¶àÍ¨µÀ
      DMA_Init(RHEOSTAT_ADC_DMA_STREAM, &DMA_InitStructure);
      // Ê¹ÄÜDMAÁ÷
  DMA_Cmd(RHEOSTAT_ADC_DMA_STREAM, ENABLE);

      // ¿ªÆôADCÊ±ÖÓ
      RCC_APB2PeriphClockCmd(RHEOSTAT_ADC_CLK , ENABLE);
  // -------------------ADC Common ½á¹¹Ìå ²ÎÊý ³õÊ¼»¯------------------------
      // ¶ÀÁ¢ADCÄ£Ê½
  ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
  // Ê±ÖÓÎªfpclk=90MHZ 4·ÖÆµ
  ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;
  // ½ûÖ¹DMAÖ±½Ó·ÃÎÊÄ£Ê½
  ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
  // ²ÉÑùÊ±¼ä¼ä¸ô
  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_20Cycles;
  ADC_CommonInit(&ADC_CommonInitStructure);

  // -------------------ADC Init ½á¹¹Ìå ²ÎÊý ³õÊ¼»¯--------------------------

  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;                               // ADC ·Ö±æÂÊ
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;                                                                // ½ûÖ¹É¨ÃèÄ£Ê½£¬¶àÍ¨µÀ²É¼¯²ÅÐèÒª
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;                                                 // Á¬Ðø×ª»»
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;                //½ûÖ¹Íâ²¿±ßÑØ´¥·¢
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;                         //Ê¹ÓÃÈí¼þ´¥·¢£¬Íâ²¿´¥·¢²»ÓÃÅäÖÃ£¬×¢ÊÍµô¼´¿É
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;                               //Êý¾ÝÓÒ¶ÔÆë
  ADC_InitStructure.ADC_NbrOfConversion = 1;                   //×ª»»Í¨µÀ 1¸ö
  ADC_Init(RHEOSTAT_ADC, &ADC_InitStructure);
  //---------------------------------------------------------------------------

  ADC_RegularChannelConfig(RHEOSTAT_ADC, RHEOSTAT_ADC_CHANNEL, 1, ADC_SampleTime_56Cycles);

  ADC_DMARequestAfterLastTransferCmd(RHEOSTAT_ADC, ENABLE);

  ADC_DMACmd(RHEOSTAT_ADC, ENABLE);
      DMA_ITConfig(DMA2_Stream0,DMA_IT_TC , ENABLE);
  /* Enable ADC3 */
  ADC_Cmd(RHEOSTAT_ADC, ENABLE);

  ADC_Cmd(RHEOSTAT_ADC, ENABLE);

  ADC_SoftwareStartConv(RHEOSTAT_ADC);
}

void ADC_Configuration(void)
{
      NVIC_Config();
      ADC_GPIO_Config();
      ADC_Mode_Config();

}

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