stm32 两通道采集片内温度和电压问题出在哪？

只看该作者 · 2013-5-22 16:13

输出完全不符合实际！！！！
void DMA_Configuration(void)
{ /* DMA1 channel1 configuration ----------------------------------------------*/
  DMA_DeInit(DMA1_Channel1);    //DMAµÄ11Í¨µÀ
  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;    //DMA¶ÔÓ¦µÄÍâÉè»ùµØÖ·
  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&AD_value; //Êý¾Ý´æ´¢µØÖ·
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;    //ÍâÉè×÷ÎªÊý¾Ý´«ÊäµÄÀ´Ô´
  DMA_InitStructure.DMA_BufferSize =2;    //»º´æ´óÐ¡
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;    //ÍâÉèµØÖ·¼Ä´æÆ÷²»±ä
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;    //ÄÚ´æµØÖ·¼Ä´æÆ÷²»±ä    ¶àÍ¨µÀÊ¹ÄÜ£¿£¿
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;    //ÍâÉèÊý¾Ý¿í¶È16Î»
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //16Î»
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;    //Ñ»·»º´æÄ£Ê½
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;  //¸ßÓÅÏÈ¼¶
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;    //Í¨µÀxÃ»ÓÐÉèÖÃµ½ÄÚ´æµ½ÄÚ´æ´«Êä
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);
    DMA_Cmd(DMA1_Channel1, ENABLE);

}

void ADC_Configuration(void)
{
/* ADC1 configuration ------------------------------------------------------*/
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //¶ÀÁ¢Ä£Ê½
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //Ê¹ÄÜÁ¬Ðø×ª»»Ä£Ê½
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //ADCÍâ²¿´¥·¢¹Ø±Õ
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;    //Êý¾ÝÓÒ¶ÔÆë
  ADC_InitStructure.ADC_NbrOfChannel = 2;    //¿ªÆôÍ¨µÀÊý 1
// ADC_InitStructure.ADC_NbrOfChannel = 1;
  ADC_Init(ADC1, &ADC_InitStructure);
  ADC_TempSensorVrefintCmd(ENABLE); //Ê¹ÄÜÎÂ¶È´«¸ÐÆ÷ºÍÄÚ²¿²Î¿¼µçÑ¹Í¨µÀ

  /* ADC1 regular channel13 configuration */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 1, ADC_SampleTime_55Cycles5);    //28.5ms ²ÉÑùÊ±¼ä
  ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 2, ADC_SampleTime_239Cycles5);

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

}

主函数部分

ADC_SoftwareStartConvCmd(ADC1, ENABLE);

while (1)
   {
//    while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);//µÈ´ý´«ÊäÍê³É·ñÔòµÚÒ»Î»Êý¾ÝÈÝÒ×¶ªÊ§

   /* Set Clock1s to 1 every 1 second */
if (ticks++ >= 900000)
{
        ticks = 0;
Clock1s = 1;
    }
    /* Printf message with AD value to serial port every 1 second  */
    if (Clock1s)
{
     Clock1s = 0;
     // AD_value[0] = (unsigned int)(((unsigned int)AD_value[0])*3300>>12); /* °Ñ²É¼¯µ½µÄÊýÖµ×ª»»³ÉµçÑ¹Êý¾Ý */

   AD_value[0] = AD_value[0]*3300/4096    ;
AD_value[1]=(1.43-AD_value[1]*3.3/4096)*1000/4.35 + 25;

HexToASCII(AD_value[0]);

USART1Write((uint8_t*)AsciiBuff,4);
USART1Write((uint8_t*)"\r\n",sizeof("\r\n"));

   HexToASCII(AD_value[1]);

USART1Write((uint8_t*)AsciiBuff,4);
USART1Write((uint8_t*)"\r\n",sizeof("\r\n"));
   }
     }