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蓝桥杯物联网竞赛_STM32L071_10_温度传感器扩展模块

news 2026/5/12 16:31:14

原理图：

温度传感器原理图：

其中芯片可以通过SCL和SDA引脚通过I2C通信向温度传感器指定地址获取温度的模拟量
再利用公式将模拟量转换成相应温度即可

实验板接口原理图：

模拟量转相应温度公式：

CubMx配置：

Keil配置：

Function:

#include"Function.h"#include"oled.h"#include"i2c.h"voidOLED_Write(unsignedchartype,unsignedchardata){unsignedcharWrite_Data[2];Write_Data[0]=type;Write_Data[1]=data;HAL_I2C_Master_Transmit(&hi2c3,0x78,Write_Data,2,0xff);}voidFunction_OledEnable(unsignedcharms){HAL_GPIO_WritePin(OLED_POWER_GPIO_Port,OLED_POWER_Pin,GPIO_PIN_RESET);HAL_Delay(ms);OLED_Init();}floatFunction_GetTemp(void){unsignedchardata[3];data[0]=0x24;data[1]=0x0B;// 地址HAL_I2C_Master_Transmit(&hi2c1,0x94,data,2,10);// 通过I2C传输向特定地址获取温度HAL_Delay(5);HAL_I2C_Master_Receive(&hi2c1,0x95,data,3,10);// 获取到数值return(float)(data[0]<<8|data[1])*175.0/65535-45;// 获取的数值是16位 << 8 等效于 * 2 ^ 8}

#ifndef__Function__#define__FUNCTION__voidOLED_Write(unsignedchartype,unsignedchardata);voidFunction_OledEnable(unsignedcharms);floatFunction_GetTemp(void);#endif

main:

#include"main.h"#include"i2c.h"#include"gpio.h"#include"oled.h"#include"Function.h"voidSystemClock_Config(void);intmain(void){HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_I2C1_Init();MX_I2C3_Init();Function_OledEnable(50);while(1){OLED_ShowNumber(0,0,12345,5,16);OLED_ShowNumber(0,2,(uint32_t)Function_GetTemp(),3,16);}}voidSystemClock_Config(void){RCC_OscInitTypeDef RCC_OscInitStruct={0};RCC_ClkInitTypeDef RCC_ClkInitStruct={0};RCC_PeriphCLKInitTypeDef PeriphClkInit={0};__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);RCC_OscInitStruct.OscillatorType=RCC_OSCILLATORTYPE_HSI;RCC_OscInitStruct.HSIState=RCC_HSI_ON;RCC_OscInitStruct.HSICalibrationValue=RCC_HSICALIBRATION_DEFAULT;RCC_OscInitStruct.PLL.PLLState=RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource=RCC_PLLSOURCE_HSI;RCC_OscInitStruct.PLL.PLLMUL=RCC_PLLMUL_4;RCC_OscInitStruct.PLL.PLLDIV=RCC_PLLDIV_2;if(HAL_RCC_OscConfig(&RCC_OscInitStruct)!=HAL_OK){Error_Handler();}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_1)!=HAL_OK){Error_Handler();}PeriphClkInit.PeriphClockSelection=RCC_PERIPHCLK_I2C1|RCC_PERIPHCLK_I2C3;PeriphClkInit.I2c1ClockSelection=RCC_I2C1CLKSOURCE_PCLK1;PeriphClkInit.I2c3ClockSelection=RCC_I2C3CLKSOURCE_PCLK1;if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit)!=HAL_OK){Error_Handler();}}voidError_Handler(void){__disable_irq();while(1){}}