在上一篇文章中我们已经有实现了ADCDMA采集光敏电阻阻值的情况但采集的结果也有待一定的验证其准确性。本期文章将使用另外一种方式采集采集光敏电阻阻值最后的实验结果我利用小电筒验证过了符合物理定律。废话不多说下面我就直接开始演示实验的操作。实验已经跑过了为了方便就在下方粘贴图片和代码了哦usb转ttl、光敏电阻、st-link及stm32f103vet6基于deepseek专家模式下的实验光敏电阻上面有一个蓝色方形的小玩意写了p103。蓝色方形小元件是贴片电阻上面的P103表示10,000Ω 10KΩ。蓝色方形P103光敏模块的10KΩ分压电阻。4.4 while循环/* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ // 1. 启动ADC转换 HAL_ADC_Start(hadc1); // 2. 等待转换完成超时100ms if (HAL_ADC_PollForConversion(hadc1, 100) HAL_OK) { // 3. 读取ADC原始值 adc_raw HAL_ADC_GetValue(hadc1); // 4. 计算电压 (参考电压3.3V) voltage adc_raw * 3.3f / 4095.0f; // 5. 计算光敏电阻阻值固定电阻在上臂光敏电阻在下臂 // 推导公式Vout 3.3 * R_ldr / (R_fixed R_ldr) // R_ldr (Vout * R_fixed) / (3.3 - Vout) if ((3.3f - voltage) 0.05f) { light_res voltage * FIXED_RES / (3.3f - voltage); } else { light_res 999999.0f; // 电压接近3.3V光线极暗阻值极大 } // 6. 通过printf打印到串口 printf(ADC:%d, Voltage:%.2fV, LightRes:%.0f ohm\r\n, adc_raw, voltage, light_res); } // 7. 停止ADC单次转换模式需要停止 HAL_ADC_Stop(hadc1); // 延时500ms防止刷屏太快 HAL_Delay(500); /* USER CODE END 3 */ } /* USER CODE END WHILE */整个main.c代码如下/* USER CODE BEGIN Header */ /** ****************************************************************************** * file : main.c * brief : Main program body ****************************************************************************** * attention * * Copyright (c) 2026 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include main.h /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include stdio.h #include sys/unistd.h // 如果编译错误可删除此行 /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ ADC_HandleTypeDef hadc1; UART_HandleTypeDef huart1; /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_ADC1_Init(void); static void MX_USART1_UART_Init(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ #define FIXED_RES 10000.0f // 模块上的固定电阻 10kΩ uint16_t adc_raw; // ADC原始值0-4095 float voltage; // 计算出的电压 float light_res; // 光敏电阻阻值 /* USER CODE END 0 */ /** * brief The application entry point. * retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_ADC1_Init(); MX_USART1_UART_Init(); /* USER CODE BEGIN 2 */ HAL_UART_Transmit(huart1, (uint8_t*)System Start\r\n, 14, 100); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ // 1. 启动ADC转换 HAL_ADC_Start(hadc1); // 2. 等待转换完成超时100ms if (HAL_ADC_PollForConversion(hadc1, 100) HAL_OK) { // 3. 读取ADC原始值 adc_raw HAL_ADC_GetValue(hadc1); // 4. 计算电压 (参考电压3.3V) voltage adc_raw * 3.3f / 4095.0f; // 5. 计算光敏电阻阻值固定电阻在上臂光敏电阻在下臂 // 推导公式Vout 3.3 * R_ldr / (R_fixed R_ldr) // R_ldr (Vout * R_fixed) / (3.3 - Vout) if ((3.3f - voltage) 0.05f) { light_res voltage * FIXED_RES / (3.3f - voltage); } else { light_res 999999.0f; // 电压接近3.3V光线极暗阻值极大 } // 6. 通过printf打印到串口 printf(ADC:%d, Voltage:%.2fV, LightRes:%.0f ohm\r\n, adc_raw, voltage, light_res); } // 7. 停止ADC单次转换模式需要停止 HAL_ADC_Stop(hadc1); // 延时500ms HAL_Delay(500); } /* USER CODE END 3 */ } /** * brief System Clock Configuration * retval None */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct {0}; RCC_PeriphCLKInitTypeDef PeriphClkInit {0}; /** 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.HSIState RCC_HSI_ON; 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(); } PeriphClkInit.PeriphClockSelection RCC_PERIPHCLK_ADC; PeriphClkInit.AdcClockSelection RCC_ADCPCLK2_DIV6; if (HAL_RCCEx_PeriphCLKConfig(PeriphClkInit) ! HAL_OK) { Error_Handler(); } } /** * brief ADC1 Initialization Function * param None * retval None */ static void MX_ADC1_Init(void) { /* USER CODE BEGIN ADC1_Init 0 */ /* USER CODE END ADC1_Init 0 */ ADC_ChannelConfTypeDef sConfig {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER CODE END ADC1_Init 1 */ /** Common config */ hadc1.Instance ADC1; hadc1.Init.ScanConvMode ADC_SCAN_DISABLE; hadc1.Init.ContinuousConvMode DISABLE; 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_0; sConfig.Rank ADC_REGULAR_RANK_1; sConfig.SamplingTime ADC_SAMPLETIME_239CYCLES_5; if (HAL_ADC_ConfigChannel(hadc1, sConfig) ! HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC1_Init 2 */ /* USER CODE END ADC1_Init 2 */ } /** * brief USART1 Initialization Function * param None * retval None */ static void MX_USART1_UART_Init(void) { /* USER CODE BEGIN USART1_Init 0 */ /* USER CODE END USART1_Init 0 */ /* USER CODE BEGIN USART1_Init 1 */ /* USER CODE END USART1_Init 1 */ 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(); } /* USER CODE BEGIN USART1_Init 2 */ /* USER CODE END USART1_Init 2 */ } /** * brief GPIO Initialization Function * param None * retval None */ static void MX_GPIO_Init(void) { /* USER CODE BEGIN MX_GPIO_Init_1 */ /* USER CODE END MX_GPIO_Init_1 */ /* GPIO Ports Clock Enable */ __HAL_RCC_GPIOA_CLK_ENABLE(); /* USER CODE BEGIN MX_GPIO_Init_2 */ /* USER CODE END MX_GPIO_Init_2 */ } /* USER CODE BEGIN 4 */ int _write(int file, char *ptr, int len) { HAL_UART_Transmit(huart1, (uint8_t*)ptr, len, 100); return len; } /* USER CODE END 4 */ /** * brief This function is executed in case of error occurrence. * retval None */ void Error_Handler(void) { /* USER CODE BEGIN Error_Handler_Debug */ /* User can add his own implementation to report the HAL error return state */ __disable_irq(); while (1) { } /* USER CODE END Error_Handler_Debug */ } #ifdef USE_FULL_ASSERT /** * brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * param file: pointer to the source file name * param line: assert_param error line source number * retval None */ void assert_failed(uint8_t *file, uint32_t line) { /* USER CODE BEGIN 6 */ /* User can add his own implementation to report the file name and line number, ex: printf(Wrong parameters value: file %s on line %d\r\n, file, line) */ /* USER CODE END 6 */ } #endif /* USE_FULL_ASSERT */有需要的话可能需要在设置里面打开浮点怎么打开可以参考下面视频连接。https://www.bilibili.com/video/BV18u4y1e7PR?spm_id_from333.788.videopod.sectionsvd_source2ce2bfa9df8730098e39d9b365679379大概是在5分钟的样子博主会讲述怎么打开浮点勾选下面红色框框的就好了。无遮挡的情况遮挡住以后的情况我用手机手电筒打在光敏电阻上面输出的结果如下ADC:0, Voltage:0.00V, LightRes:0 ohm手电直射 → ADC0电阻 0Ω强光手电远离 → ADC 变大电阻变大弱光有对此类实验结果有疑惑的小伙伴可以帮我再验证验证欢迎大家一块学习有不对的地方请赐教哦 
长河君 · 2026/10/24 5:18:32 · 阅读 1.2k 土木本科生的STM32探索之旅：ADC+阻塞式采集外接光敏电阻的阻值，并usart串口将数据发送到电脑串口助手
在上一篇文章中我们已经有实现了ADCDMA采集光敏电阻阻值的情况但采集的结果也有待一定的验证其准确性。本期文章将使用另外一种方式采集采集光敏电阻阻值最后的实验结果我利用小电筒验证过了符合物理定律。废话不多说下面我就直接开始演示实验的操作。实验已经跑过了为了方便就在下方粘贴图片和代码了哦usb转ttl、光敏电阻、st-link及stm32f103vet6基于deepseek专家模式下的实验光敏电阻上面有一个蓝色方形的小玩意写了p103。蓝色方形小元件是贴片电阻上面的P103表示10,000Ω 10KΩ。蓝色方形P103光敏模块的10KΩ分压电阻。4.4 while循环/* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ // 1. 启动ADC转换 HAL_ADC_Start(hadc1); // 2. 等待转换完成超时100ms if (HAL_ADC_PollForConversion(hadc1, 100) HAL_OK) { // 3. 读取ADC原始值 adc_raw HAL_ADC_GetValue(hadc1); // 4. 计算电压 (参考电压3.3V) voltage adc_raw * 3.3f / 4095.0f; // 5. 计算光敏电阻阻值固定电阻在上臂光敏电阻在下臂 // 推导公式Vout 3.3 * R_ldr / (R_fixed R_ldr) // R_ldr (Vout * R_fixed) / (3.3 - Vout) if ((3.3f - voltage) 0.05f) { light_res voltage * FIXED_RES / (3.3f - voltage); } else { light_res 999999.0f; // 电压接近3.3V光线极暗阻值极大 } // 6. 通过printf打印到串口 printf(ADC:%d, Voltage:%.2fV, LightRes:%.0f ohm\r\n, adc_raw, voltage, light_res); } // 7. 停止ADC单次转换模式需要停止 HAL_ADC_Stop(hadc1); // 延时500ms防止刷屏太快 HAL_Delay(500); /* USER CODE END 3 */ } /* USER CODE END WHILE */整个main.c代码如下/* USER CODE BEGIN Header */ /** ****************************************************************************** * file : main.c * brief : Main program body ****************************************************************************** * attention * * Copyright (c) 2026 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include main.h /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include stdio.h #include sys/unistd.h // 如果编译错误可删除此行 /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ ADC_HandleTypeDef hadc1; UART_HandleTypeDef huart1; /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_ADC1_Init(void); static void MX_USART1_UART_Init(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ #define FIXED_RES 10000.0f // 模块上的固定电阻 10kΩ uint16_t adc_raw; // ADC原始值0-4095 float voltage; // 计算出的电压 float light_res; // 光敏电阻阻值 /* USER CODE END 0 */ /** * brief The application entry point. * retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_ADC1_Init(); MX_USART1_UART_Init(); /* USER CODE BEGIN 2 */ HAL_UART_Transmit(huart1, (uint8_t*)System Start\r\n, 14, 100); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ // 1. 启动ADC转换 HAL_ADC_Start(hadc1); // 2. 等待转换完成超时100ms if (HAL_ADC_PollForConversion(hadc1, 100) HAL_OK) { // 3. 读取ADC原始值 adc_raw HAL_ADC_GetValue(hadc1); // 4. 计算电压 (参考电压3.3V) voltage adc_raw * 3.3f / 4095.0f; // 5. 计算光敏电阻阻值固定电阻在上臂光敏电阻在下臂 // 推导公式Vout 3.3 * R_ldr / (R_fixed R_ldr) // R_ldr (Vout * R_fixed) / (3.3 - Vout) if ((3.3f - voltage) 0.05f) { light_res voltage * FIXED_RES / (3.3f - voltage); } else { light_res 999999.0f; // 电压接近3.3V光线极暗阻值极大 } // 6. 通过printf打印到串口 printf(ADC:%d, Voltage:%.2fV, LightRes:%.0f ohm\r\n, adc_raw, voltage, light_res); } // 7. 停止ADC单次转换模式需要停止 HAL_ADC_Stop(hadc1); // 延时500ms HAL_Delay(500); } /* USER CODE END 3 */ } /** * brief System Clock Configuration * retval None */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct {0}; RCC_PeriphCLKInitTypeDef PeriphClkInit {0}; /** 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.HSIState RCC_HSI_ON; 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(); } PeriphClkInit.PeriphClockSelection RCC_PERIPHCLK_ADC; PeriphClkInit.AdcClockSelection RCC_ADCPCLK2_DIV6; if (HAL_RCCEx_PeriphCLKConfig(PeriphClkInit) ! HAL_OK) { Error_Handler(); } } /** * brief ADC1 Initialization Function * param None * retval None */ static void MX_ADC1_Init(void) { /* USER CODE BEGIN ADC1_Init 0 */ /* USER CODE END ADC1_Init 0 */ ADC_ChannelConfTypeDef sConfig {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER CODE END ADC1_Init 1 */ /** Common config */ hadc1.Instance ADC1; hadc1.Init.ScanConvMode ADC_SCAN_DISABLE; hadc1.Init.ContinuousConvMode DISABLE; 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_0; sConfig.Rank ADC_REGULAR_RANK_1; sConfig.SamplingTime ADC_SAMPLETIME_239CYCLES_5; if (HAL_ADC_ConfigChannel(hadc1, sConfig) ! HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC1_Init 2 */ /* USER CODE END ADC1_Init 2 */ } /** * brief USART1 Initialization Function * param None * retval None */ static void MX_USART1_UART_Init(void) { /* USER CODE BEGIN USART1_Init 0 */ /* USER CODE END USART1_Init 0 */ /* USER CODE BEGIN USART1_Init 1 */ /* USER CODE END USART1_Init 1 */ 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(); } /* USER CODE BEGIN USART1_Init 2 */ /* USER CODE END USART1_Init 2 */ } /** * brief GPIO Initialization Function * param None * retval None */ static void MX_GPIO_Init(void) { /* USER CODE BEGIN MX_GPIO_Init_1 */ /* USER CODE END MX_GPIO_Init_1 */ /* GPIO Ports Clock Enable */ __HAL_RCC_GPIOA_CLK_ENABLE(); /* USER CODE BEGIN MX_GPIO_Init_2 */ /* USER CODE END MX_GPIO_Init_2 */ } /* USER CODE BEGIN 4 */ int _write(int file, char *ptr, int len) { HAL_UART_Transmit(huart1, (uint8_t*)ptr, len, 100); return len; } /* USER CODE END 4 */ /** * brief This function is executed in case of error occurrence. * retval None */ void Error_Handler(void) { /* USER CODE BEGIN Error_Handler_Debug */ /* User can add his own implementation to report the HAL error return state */ __disable_irq(); while (1) { } /* USER CODE END Error_Handler_Debug */ } #ifdef USE_FULL_ASSERT /** * brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * param file: pointer to the source file name * param line: assert_param error line source number * retval None */ void assert_failed(uint8_t *file, uint32_t line) { /* USER CODE BEGIN 6 */ /* User can add his own implementation to report the file name and line number, ex: printf(Wrong parameters value: file %s on line %d\r\n, file, line) */ /* USER CODE END 6 */ } #endif /* USE_FULL_ASSERT */有需要的话可能需要在设置里面打开浮点怎么打开可以参考下面视频连接。https://www.bilibili.com/video/BV18u4y1e7PR?spm_id_from333.788.videopod.sectionsvd_source2ce2bfa9df8730098e39d9b365679379大概是在5分钟的样子博主会讲述怎么打开浮点勾选下面红色框框的就好了。无遮挡的情况遮挡住以后的情况我用手机手电筒打在光敏电阻上面输出的结果如下ADC:0, Voltage:0.00V, LightRes:0 ohm手电直射 → ADC0电阻 0Ω强光手电远离 → ADC 变大电阻变大弱光有对此类实验结果有疑惑的小伙伴可以帮我再验证验证欢迎大家一块学习有不对的地方请赐教哦