壓力數值�?題

[Dennis1]

我�?�有購買STEVAL-MKI192V1開發�?��?�?LPS22HH的壓力感測器

但使用上有一些�?題想請教 : 

1. 壓力讀�?��?�?�為28H 29H 2AH, 溫度讀�?��?�?�為 2B 2C, 但壓力�?測出來的數值為35~FFH �?3EH�? 09H. 

數值經�?�算�?符�?�壓力數值, 溫度也是相�?�的�??應.請�?�?如何解決 ?

以上是10進�?顯示，由左至�?�分別為28H 29H 2AH資料

2. 本人是使用I2C通訊的方�?，請�?是�?�需�?�?始化LPS22H來設定�?�數?有的話請�??供�?�數

3. 本人是使用microchip MCU進行通訊的,通訊上需�?上拉電阻, 請�?阻值多少?

[Eleon BORLINI]

Hi @Dennis​ , which uC are you using as a master for the LPS22HH? Did you correctly configured the sensor for the pressure reading? I suggest you to check your code with the C drivers on Github repository for the general sensor configuration for the data polling (LINK) and in particular for the pressure data conversion from int32 LSB to hPa:

/**
  * @defgroup    LPS22HH_Sensitivity
  * @brief       These functions convert raw-data into engineering units.
  * @{
  *
  */
float_t lps22hh_from_lsb_to_hpa(int32_t lsb)
{
  return ( (float_t) lsb / 4096.0f );
}
 
float_t lps22hh_from_lsb_to_celsius(int16_t lsb)
{
  return ( (float_t) lsb / 100.0f );
}

Regards