CCS/AWR1843BOOST: Questions with the definition of the Struct type

Tool/software: Code Composer Studio

Hi,

  In the DSP core, I have defined the Structure type as belows:

typedef struct MmwDemo_DSS_DataPathObj_t
{
 
       float invOneQFormat; 
      uint16_t minRange; 
      uint16_t maxRange;
      float velResolution;

      MmwDemo_detectedObjActual detObj2D[100];

     ...

}

The type MmwDemo_detectedObjActual is defined as follows:

typedef struct MmwDemo_detectedObjActual_t
{
    uint16_t   rangeIdx;            /*!< @brief Range index */
    uint16_t   dopplerIdx;          /*!< @brief Doppler index */
    uint16_t   range;               /*!< @brief Range (meters in oneQformat) */
    int16_t    speed;               /*!< @brief Doppler (m/s in oneQformat) */
    int16_t    sinAzim;             /*!< @brief wx  sin(Azim).  Q format provides the bitwidth. */
    uint16_t   peakVal;             /*!< @brief Peak value */

    uint16_t   rangeSNRdB;          /*!< @brief Range SNR (dB)  */
    uint16_t   dopplerSNRdB;        /*!< @brief Doppler SNR (dB) */
    uint16_t   sinAzimSNRLin;       /*!< @brief omega SNR (linear scale) */
    uint16_t   sinElevSNRLin;       /*!< @brief omega SNR (linear scale) */

    int16_t  x;             /*!< @brief x - coordinate in meters. Q format provides the bitwidth. */
    int16_t  y;             /*!< @brief y - coordinate in meters. Q format provides the bitwidth. */
    int16_t  z;             /*!< @brief z - coordinate in meters. Q format provides the bitwidth. */

}MmwDemo_detectedObjActual;

If I define the  type MmwDemo_DSS_DataPathObj_t as above, the value of the variable invOneQFormat will be changed in the program  excution,that is to say, if I set the value of invOneQFormat=0.005, when the proggram is  excuted for a while, the value of invOneQFormat  is channed into an very small value,.But if I defined the MmwDemo_DSS_DataPathObj_t as follwing:

typedef struct MmwDemo_DSS_DataPathObj_t
{
 
       float invOneQFormat; 
      uint16_t minRange; 
      uint16_t maxRange;

      MmwDemo_detectedObjActual detObj2D[100];
      float velResolution;

     ...

}

This problem will be solved.The value of the variable invOneQFormat will not be changed. What is the reason for that? The difference of this two definition is  the number of the bytes before the declaration MmwDemo_detectedObjActual detObj2D[100]; ,the first one is 12，and the second one  is 8.  I have tried that if the byte number is 4,  the variable invOneQFormat value will be unchanged too.Can  anyone tell me the reason for that?

Thanks,

Regards,

Rata