STEVAL-STWINKT1B上带了一颗HTS221，它一种用于测量相对湿度和温度的超紧凑型传感器。它包含一个感应元件和一个混合信号ASIC，可通过数字串行接口提供测量信息。该感应元件包含能够检测相对湿度变化的聚合物介质平面电容器结构，使用意法半导体专用工艺制造。HTS221采用带顶部开孔金属帽的小型触点阵列（HLGA）封装，确保在-40 °C至+120 °C温度范围内正常工作。

• 0 - 100%相对湿度范围
• 供电电压范围为1.7至3.6 V
• 低功耗：2 μA @ 1 Hz ODR
• 可选ODR从1 Hz到12.5 Hz
• 高rH灵敏度：0.004% rH/LSB
• 湿度测量误差：± 3.5% rH，20 - +80% rH
• 温度测量误差：± 0.5 °C，15 - +40 °C
• 嵌入式16位ADC
• 16位湿度和温度输出数据
• SPI和I²C接口
• 工厂校准
• 微型 2 x 2 x 0.9 mm 封装
• 兼容ECOPACK®

查看原理图，可以看到HTS221接到i2c2总线上

继续使用【STEVAL-STWINKT1B测评】2、利用ST板模板快速创建工程创建的工程

首先启动STM32cubeMX，修改i2c2的配置

打开Select Components

寻找到HTS221，并配置为I2C模式

打开X-CUBE-MEMS1配置项

按下图进行配置

生成代码，修改main.c如下

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 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 "dac.h"
#include "dfsdm.h"
#include "dma.h"
#include "i2c.h"
#include "ltdc.h"
#include "rtc.h"
#include "sai.h"
#include "sdmmc.h"
#include "spi.h"
#include "tim.h"
#include "usart.h"
#include "usb_otg.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "hts221.h"
#include "steval_stwinkt1b_bus.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 */
HTS221_Object_t HTS221_Object;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void PeriphCommonClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#include "stdio.h"
#ifdef __GNUC__
  #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
  #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif

PUTCHAR_PROTOTYPE
{
  HAL_UART_Transmit(&huart2,(uint8_t *)&ch,1,0xFFFF);
  return ch;
}

/* 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();

  /* Configure the peripherals common clocks */
  PeriphCommonClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_ADC1_Init();
  MX_DAC1_Init();
  MX_DFSDM1_Init();
  MX_I2C3_Init();
  MX_I2C4_Init();
  MX_LTDC_Init();
  MX_RTC_Init();
  MX_SAI1_Init();
  MX_SDMMC1_SD_Init();
  MX_SPI1_Init();
  MX_SPI2_Init();
  MX_SPI3_Init();
  MX_TIM2_Init();
  MX_TIM5_Init();
  MX_USART2_UART_Init();
  MX_USART3_UART_Init();
  MX_USB_OTG_FS_PCD_Init();
  /* USER CODE BEGIN 2 */
  printf("STEVAL-STWINKT1B\r\n");


  HTS221_IO_t HTS221_IO;
  uint8_t status;
  float hum,temp;
  HTS221_IO.Init = BSP_I2C2_Init;
  HTS221_IO.DeInit = BSP_I2C2_DeInit;
  HTS221_IO.BusType = HTS221_I2C_BUS;
  HTS221_IO.Address = HTS221_I2C_ADDRESS;
  HTS221_IO.WriteReg = BSP_I2C2_WriteReg;
  HTS221_IO.ReadReg = BSP_I2C2_ReadReg;
  HTS221_IO.GetTick = HAL_GetTick;
  HTS221_IO.Delay = HAL_Delay;

  HTS221_RegisterBusIO(&HTS221_Object, &HTS221_IO);
  HTS221_Init(&HTS221_Object);
  uint8_t id = 0;
  HTS221_ReadID(&HTS221_Object, &id);
  printf("id:%x\r\n",id);
  HTS221_HUM_Enable(&HTS221_Object);
  HTS221_TEMP_Enable(&HTS221_Object);

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    HTS221_HUM_GetHumidity(&HTS221_Object, &hum);
    printf("hum:%f\r\n",hum);
    HTS221_TEMP_GetTemperature(&HTS221_Object, &temp);
    printf("temp:%f\r\n",temp);
    HAL_Delay(1000);
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* 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
  */
  if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure LSE Drive Capability
  */
  HAL_PWR_EnableBkUpAccess();
  __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48|RCC_OSCILLATORTYPE_HSE
                              |RCC_OSCILLATORTYPE_LSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 2;
  RCC_OscInitStruct.PLL.PLLN = 30;
  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_5) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief Peripherals Common Clock Configuration
  * @retval None
  */
void PeriphCommonClock_Config(void)
{
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  /** Initializes the peripherals clock
  */
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_SAI1|RCC_PERIPHCLK_ADC;
  PeriphClkInit.Sai1ClockSelection = RCC_SAI1CLKSOURCE_PLLSAI1;
  PeriphClkInit.AdcClockSelection = RCC_ADCCLKSOURCE_PLLSAI1;
  PeriphClkInit.PLLSAI1.PLLSAI1Source = RCC_PLLSOURCE_HSE;
  PeriphClkInit.PLLSAI1.PLLSAI1M = 5;
  PeriphClkInit.PLLSAI1.PLLSAI1N = 96;
  PeriphClkInit.PLLSAI1.PLLSAI1P = RCC_PLLP_DIV25;
  PeriphClkInit.PLLSAI1.PLLSAI1Q = RCC_PLLQ_DIV4;
  PeriphClkInit.PLLSAI1.PLLSAI1R = RCC_PLLR_DIV4;
  PeriphClkInit.PLLSAI1.PLLSAI1ClockOut = RCC_PLLSAI1_SAI1CLK|RCC_PLLSAI1_ADC1CLK;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != 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 */

编译下载到板子上，打开串口，打印如下

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