stm32标准外设库 光敏电阻传感器代码

以下是使用STM32标准外设库控制光敏电阻传感器的代码示例：

首先需要在头文件中引用需要的库：

#include "stm32f10x.h"
#include "stm32f10x_adc.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"

然后定义ADC相关的变量：

ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

接着在`main()`函数中初始化GPIO和ADC：

int main(void)
{
  /* Enable ADC1 and GPIOA clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);

  /* Configure PA.1 (ADC Channel 1) as analog input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* ADC1 Configuration ------------------------------------------------------*/
  /* ADC1 and ADC2 operate independently */
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  /* Disable the scan conversion so we do one at a time */
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;
  /* Don't do contimuous conversions - do them on demand */
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
  /* Start conversin by software, not an external trigger */
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  /* Conversions are 12 bit - put them in the lower 12 bits of the result */
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 1;
  ADC_Init(ADC1, &ADC_InitStructure);

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

  /* Enable ADC1 reset calibration register */
  ADC_ResetCalibration(ADC1);
  /* Check the end of ADC1 reset calibration register */
  while (ADC_GetResetCalibrationStatus(ADC1));

  /* Start ADC1 calibration */
  ADC_StartCalibration(ADC1);
  /* Check the end of ADC1 calibration */
  while (ADC_GetCalibrationStatus(ADC1));
}

最后，我们可以通过以下代码读取光敏电阻传感器的值：

uint16_t read_adc(void)
{
  /* Start ADC1 Software Conversion */
  ADC_SoftwareStartConvCmd(ADC1, ENABLE);

  /* Wait until we have the conversion value */
  while (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);

  /* Get the conversion value */
  return ADC_GetConversionValue(ADC1);
}

需要注意的是，这个示例代码假设你的光敏电阻传感器已经连接到MCU的PA.1引脚。如果你使用其他引脚，需要修改相应的GPIO初始化代码。