stm32f407光敏电阻传感器代码

以下是基于STM32F407的光敏电阻传感器代码示例：

#include "stm32f4xx.h"

#define ADC3_DR_ADDRESS     ((uint32_t)0x4001224C)

ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

__IO uint16_t ADC3ConvertedValue[1];

void RCC_Configuration(void)
{
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3, ENABLE);
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
}

void GPIO_Configuration(void)
{
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
}

void DMA_Configuration(void)
{
  DMA_InitStructure.DMA_Channel = DMA_Channel_2;
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC3_DR_ADDRESS;
  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC3ConvertedValue;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = 1;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
  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_FIFOMode = DMA_FIFOMode_Disable;
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA2_Stream0, &DMA_InitStructure);

  DMA_Cmd(DMA2_Stream0, ENABLE);
}

void ADC_Configuration(void)
{
  ADC_CommonInitTypeDef ADC_CommonInitStructure;

  ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
  ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
  ADC_CommonInit(&ADC_CommonInitStructure);

  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfConversion = 1;
  ADC_Init(ADC3, &ADC_InitStructure);

  ADC_RegularChannelConfig(ADC3, ADC_Channel_10, 1, ADC_SampleTime_3Cycles);

  ADC_DMARequestAfterLastTransferCmd(ADC3, ENABLE);

  ADC_DMACmd(ADC3, ENABLE);

  ADC_Cmd(ADC3, ENABLE);
}

int main(void)
{
  RCC_Configuration();
  GPIO_Configuration();
  DMA_Configuration();
  ADC_Configuration();

  while (1)
  {
    // 等待DMA传输完成
    while (DMA_GetFlagStatus(DMA2_Stream0, DMA_FLAG_TCIF0) == RESET);

    // 重置DMA标志位
    DMA_ClearFlag(DMA2_Stream0, DMA_FLAG_TCIF0);

    // 获取光敏电阻传感器测量值
    uint16_t light = ADC3ConvertedValue[0];

    // 处理测量值
    // ...

    // 睡眠一段时间
    Delay(100);
  }
}

在此示例中，使用了DMA来获取ADC测量值，这样可以降低CPU占用率。在`while(1)`循环中，等待DMA传输完成并获取ADC测量值，然后对测量值进行处理，最后睡眠一段时间。请注意，此示例仅供参考，您需要根据您的具体硬件和应用程序对其进行修改。