【STM32G431RBTx】备战蓝桥杯嵌入式→扩展模块→光敏电阻/TRAO, TRAO
文章目录
- 前言
- 一、软件准备
- 二、光敏电阻
- 1.扩展板上模块的原理图以及我们需要配置的元素
- 2.CubeMx的配置步骤
- 三、测试代码
- 四、演示效果
- 五、工程链接
- 六、总结
前言
我们学完了双路ADC采集之后，就开始学习光敏电阻的应用
一、软件准备
1、MDK4或者MDK5（可到官网或者其他途径获取，本人使用的是MDK5）
2、Cubemx（可到官网自行下载）
3、安装G4的包（1.2.0，1.3.0以及1.4.0均可）
4、串口调试助手（COM）
二、光敏电阻
1.扩展板上模块的原理图以及我们需要配置的元素
光敏电阻部分原理图:
模块在扩展板的布局:
分析:可以看出，光敏电阻的TRDO和数码管的SCK共用PA3，光敏电阻的TRAO和双路ADC的AO1共用PA4，所以如果我们要使用光敏电阻，需要将P3的第三个和第四个跳线帽跳到P4的第三个和第四个跳线帽。同时PA3(TRDO是数字输出口)接收的电平只有0V和3.3V，所以只需要将PA3设为输入模式采集高低电平即可，PA4(TRAO是模拟输出口)接受的电平是连续的0-3.3V，所以将PA4调整为ADC采集模式，又因为在学习双路ADC时已经将PA4PA5设置为ADC采集模式且不需要修改，所以我们将在双路ADC的工程代码的基础上修改配置以生成工程。
2.CubeMx的配置步骤
RCC配置:略
设置调试接口:设置为Serial Wire
IO配置:
将PA4, PA5设置为双路ADC采集(具体过程参考双路ADC模块文章)
将PA3设置为GPIO_input模式
生成工程:点击GENERATE CODE生成工程
三、测试代码
生成工程之后，自行编写ldr.c和ldr.h文件并加入到工程中(LDR是光敏电阻的缩写)。
ldr.h:
#ifndef __LDR_H__
#define __LDR_H__#include "main.h"extern unsigned char trdo; //数字输出采集储存参数
extern unsigned int trao; //模拟输出采集储存参数void LDR_ReadAODO(void);#endifldr.c:
#include "ldr.h"
#include "dadc.h"unsigned char trdo;
unsigned int trao;void LDR_ReadAODO(void)
{trdo = HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_3);trao = adc2_in17_AO1;
}main.c:
/* USER CODE BEGIN Header */
/********************************************************************************* @file : main.c* @brief : Main program body******************************************************************************* @attention** Copyright (c) 2023 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"
#include "adc.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "dadc.h"
#include "ldr.h"
#include "lcd.h"
#include "stdio.h"
/* 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 ---------------------------------------------------------*//* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 *//* 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_ADC2_Init();/* USER CODE BEGIN 2 */LCD_Init();LCD_Clear(Black);LCD_SetBackColor(Black);LCD_SetTextColor(White);/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */LDR_ReadAODO();getDualADC(&hadc2);char text[30];sprintf(text, "in17:%.2fV in13:%.2fV", adc2_in17_AO1 * 3.3 / 4096.0, adc2_in13_AO2 * 3.3 / 4096.0);LCD_DisplayStringLine(Line0, text);sprintf(text, "Trao:%.2fV Trdo:%d", trao * 3.3 / 4096.0, trdo);LCD_DisplayStringLine(Line2, text);}/* USER CODE END 3 */
}/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Configure the main internal regulator output voltage*/HAL_PWREx_ControlVoltageScaling(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.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV3;RCC_OscInitStruct.PLL.PLLN = 20;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;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_DIV1;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* 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 */四、演示效果
五、工程链接
光敏电阻模块工程
六、总结
以上就是光敏电阻的配置过程，测试代码以及测试效果
以往的扩展板模块:
【STM32G431RBTx】备战蓝桥杯嵌入式→扩展模块→SEG
【STM32G431RBTx】备战蓝桥杯嵌入式→扩展模块→双路ADC/AO1, AO2
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