STM32通过ADC1读取光敏电阻的值转换光照强度

#include "main.h"
 #include "stdio.h"
 #include "string.h"
 
 ADC_HandleTypeDef hadc1;
 UART_HandleTypeDef huart1;
 
 float LightIntensity;
 
 int main(void)
 {
   HAL_Init();
   SystemClock_Config();
   MX_GPIO_Init();
   MX_ADC1_Init();
   MX_USART1_UART_Init();
 
   while (1)
   {
     // 启动ADC转换
     HAL_ADC_Start(&hadc1);
     // 等待转换完成
     HAL_ADC_PollForConversion(&hadc1, 100);
     // 获取ADC转换结果
     uint16_t adc_value = HAL_ADC_GetValue(&hadc1);
 
     // 将ADC转换结果转换为光线强度
     LightIntensity = (float)adc_value / 4095 * 100;
 
     // 将数据打印到串口
     char msg[50];
     sprintf(msg, "Light intensity: %.2f%%n", LightIntensity);
     HAL_UART_Transmit(&huart1, (uint8_t*)msg, strlen(msg), 1000);
 
     // 延迟一段时间再次采集
     HAL_Delay(5000);
   }
 }
 
 void SystemClock_Config(void)
 {
   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 
   /** Configure the main internal regulator output voltage 
   */
   __HAL_RCC_PWR_CLK_ENABLE();
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   /** Initializes the RCC Oscillators according to the specified parameters
   * in the RCC_OscInitTypeDef structure.
   */
   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
   RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
   RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
   {
     Error_Handler();
   }
   /** Initializes the CPU, AHB and APB buses clocks
   */
   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
 
   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
   {
     Error_Handler();
   }
 }
 
 static void MX_ADC1_Init(void)
 {
 
   ADC_ChannelConfTypeDef sConfig = {0};
 
   /** Common config 
   */
   hadc1.Instance = ADC1;
   hadc1.Init.ScanConvMode = DISABLE;
   hadc1.Init.ContinuousConvMode = ENABLE;
   hadc1.Init.DiscontinuousConvMode = DISABLE;
   hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
   hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
   hadc1.Init.NbrOfConversion = 1;
   if (HAL_ADC_Init(&hadc1) != HAL_OK)
   {
     Error_Handler();
   }
   /** Configure Regular Channel 
   */
   sConfig.Channel = ADC_CHANNEL_1;
   sConfig.Rank = ADC_REGULAR_RANK_1;
   sConfig.SamplingTime = ADC_SAMPLETIME_13CYCLES_5;
   if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
   {
     Error_Handler();
   }
 
 }
 
 static void MX_USART1_UART_Init(void)
 {
 
   huart1.Instance = USART1;
   huart1.Init.BaudRate = 115200;
   huart1.Init.WordLength = UART_WORDLENGTH_8B;
   huart1.Init.StopBits = UART_STOPBITS_1;
   huart1.Init.Parity = UART_PARITY_NONE;
   huart1.Init.Mode = UART_MODE_TX_RX;
   huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE; 
   huart1.Init.OverSampling = UART_OVERSAMPLING_16; if (HAL_UART_Init(&huart1) != HAL_OK) { Error_Handler(); }
 
 }
 
 static void MX_GPIO_Init(void) 
 {
     GPIO_InitTypeDef GPIO_InitStruct = {0};
     /* GPIO Ports Clock Enable */
     __HAL_RCC_GPIOA_CLK_ENABLE();
     /*Configure GPIO pin : PA1 */
     GPIO_InitStruct.Pin = GPIO_PIN_1;
     GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 }
 void Error_Handler(void) 
 {
     while(1);
 }
 #ifdef  USE_FULL_ASSERT
 void assert_failed(uint8_t *file, uint32_t line) 
 {
 }
 #endif