一：LPS22HH基本知识：

LPS22HH是一款超小型压阻式绝对压力传感器，它兼具数字输出气压计的功能。该设备包含一个传感元件以及一个集成电路接口，该接口可通过I2C、MIPI13CSM或SPI方式从传感元件与应用程序进行通信。

该传感元件用于检测绝对压力，由ST公司开发的专用工艺制造的悬吊膜构成

LPS22HH现已提供全模、带孔LGA封装(HLGA)版本。该产品保证可在从-40°C至+85°C的温度范围内稳定运行。该封装带有孔洞设计，以便外部压力能够触及传感元件。

二：软件代码如下所示：

void lps22hh_init( void )
{
  /* Initialize mems driver interface */
  dev_ctx.write_reg = platform_write;
  dev_ctx.read_reg = platform_read;
//  dev_ctx.mdelay = platform_delay;
  dev_ctx.handle = &SENSOR_BUS;
  /* Initialize platform specific hardware */
  platform_init();
  /* Wait sensor boot time */
  platform_delay(BOOT_TIME);
  /* Check device ID */
  whoamI = 0;
  lps22hh_device_id_get(&dev_ctx, &whoamI);

  if ( whoamI != LPS22HH_ID )
    while (1); /*manage here device not found */

  /* Restore default configuration */
  lps22hh_reset_set(&dev_ctx, PROPERTY_ENABLE);

  do {
    lps22hh_reset_get(&dev_ctx, &rst);
  } while (rst);

  /* Enable Block Data Update */
  lps22hh_block_data_update_set(&dev_ctx, PROPERTY_ENABLE);
  /* Set Output Data Rate */
  lps22hh_data_rate_set(&dev_ctx, LPS22HH_10_Hz_LOW_NOISE);
}

2.2　读取函数，以及数据处理部分函数：

void lps22hh_read_data_polling(void)
{

  /* Read samples in polling mode (no int) */
    /* Read output only if new value is available */
    lps22hh_read_reg(&dev_ctx, LPS22HH_STATUS, (uint8_t *)&reg.status, 10);

    if (reg.status.p_da) {
    memset(&data_raw_pressure, 0x00, sizeof(uint32_t));
        lps22hh_pressure_raw_get(&dev_ctx, &data_raw_pressure);
        pressure_hPa = lps22hh_from_lsb_to_hpa( data_raw_pressure);
        sprintf((char *)tx_buffer, "ST-LPS22HH Pressure:%6.2f hpa\r\n", pressure_hPa);
        tx_com( tx_buffer, strlen( (char const *)tx_buffer ) );
    }

    if (reg.status.t_da) {
        memset(&data_raw_temperature, 0x00, sizeof(int16_t));
        lps22hh_temperature_raw_get(&dev_ctx, &data_raw_temperature);
        temperature_degC = lps22hh_from_lsb_to_celsius(
                            data_raw_temperature );
        sprintf((char *)tx_buffer, "ST-LPS22HH Temperature :%6.2f ℃\r\n",
                temperature_degC );
        tx_com( tx_buffer, strlen( (char const *)tx_buffer ) );
    }
}

三：串口数据读取部分：