第十二章：温度传感器拓展模块

1.资源介绍

2.STM32CuBeMX配置

3.程序编写

#include "main.h"
#include "i2c.h"
#include "usart.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#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 */
int fputc(int ch,FILE *p)
{HAL_UART_Transmit(&huart2,(uint8_t *)&ch,1,0xffff);return ch;
}
float STS30_Proc(void)                                                                              //温度计程序
{uint8_t tem_data[2];//写入数据缓冲区 float tem;                                                        tem_data[0] = 0x24;tem_data[1] = 0x0B;HAL_I2C_Master_Transmit(&hi2c2, 0x4A<<1, tem_data, 2, 10);//开启温度转化 为下一次运行准备数据HAL_Delay(100);HAL_I2C_Master_Receive(&hi2c2, (0x4A << 1)+1, tem_data, 2, 10);//初始化时开启了一次温度转化 现在来读取 或者之前运行过的温度转化 现在读取tem = (float)((tem_data[0] << 8 | tem_data[1]) * 175.0 / 65535 - 45); //计算并返回温度结果return tem;
}
/* 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 */MX_USART2_UART_Init();/* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_I2C2_Init();/* USER CODE BEGIN 2 */printf("this is tem init\r\n");/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){STS30_Proc();printf("tem:%.2f\r\n",STS30_Proc());HAL_Delay(500);/* USER CODE END WHILE *//* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}