sths34pf80 does not work

[Lilly123]

Hi,

I am evaluating sths34pf80 but unfortuantely I am not able to make it work. I am referiing to the code in the github 
https://github.com/STMicroelectronics/STMems_Standard_C_drivers/tree/master/sths34pf80_STdC

The below code is from example sths34pf80_tmos_presence_detection.

  /* Wait sensor boot time */
  platform_delay(BOOT_TIME);

  /* Check device ID */
  sths34pf80_device_id_get(&dev_ctx, &whoami);
  if (whoami != STHS34PF80_ID)
    while (1);

  /* Set averages (AVG_TAMB = 8, AVG_TMOS = 32) */
  sths34pf80_avg_tobject_num_set(&dev_ctx, STHS34PF80_AVG_TMOS_32);
  sths34pf80_avg_tambient_num_set(&dev_ctx, STHS34PF80_AVG_T_8);

  /* read filters */
  sths34pf80_lpf_m_bandwidth_get(&dev_ctx, &lpf_m);
  sths34pf80_lpf_p_bandwidth_get(&dev_ctx, &lpf_p);
  sths34pf80_lpf_p_m_bandwidth_get(&dev_ctx, &lpf_p_m);
  sths34pf80_lpf_a_t_bandwidth_get(&dev_ctx, &lpf_a_t);

  snprintf((char *)tx_buffer, sizeof(tx_buffer),
           "lpf_m: %02d, lpf_p: %02d, lpf_p_m: %02d, lpf_a_t: %02d\r\n", lpf_m, lpf_p, lpf_p_m, lpf_a_t);
  tx_com(tx_buffer, strlen((char const *)tx_buffer));

  /* Set BDU */
  sths34pf80_block_data_update_set(&dev_ctx, 1);

  sths34pf80_presence_threshold_set(&dev_ctx, 200);
  sths34pf80_presence_hysteresis_set(&dev_ctx, 20);
  sths34pf80_motion_threshold_set(&dev_ctx, 300);
  sths34pf80_motion_hysteresis_set(&dev_ctx, 30);

  sths34pf80_algo_reset(&dev_ctx);

  /* Set interrupt */
  sths34pf80_int_or_set(&dev_ctx, STHS34PF80_INT_PRESENCE);
  sths34pf80_route_int_set(&dev_ctx, STHS34PF80_INT_OR);

  /* Set ODR */
  sths34pf80_odr_set(&dev_ctx, STHS34PF80_ODR_AT_4Hz);

  /* Presence event detected in irq handler */
  while (1)
  {
    sths34pf80_func_status_t func_status;
    uint8_t motion;
    uint8_t presence;

    /* handle event in a "thread" alike code */
    if (1)
    {
      wakeup_thread = 0;
      motion = 0;
      presence = 0;

      do
      {
        sths34pf80_func_status_get(&dev_ctx, &func_status);

        if (func_status.pres_flag != presence)
        {
          presence = func_status.pres_flag;

          if (presence)
          {
            snprintf((char *)tx_buffer, sizeof(tx_buffer), "Start of Presence\r\n");
            tx_com(tx_buffer, strlen((char const *)tx_buffer));
          }
          else
          {
            snprintf((char *)tx_buffer, sizeof(tx_buffer), "End of Presence\r\n");
            tx_com(tx_buffer, strlen((char const *)tx_buffer));
          }
        }

        if (func_status.mot_flag != motion)
        {
          motion = func_status.mot_flag;

          if (motion)
          {
            snprintf((char *)tx_buffer, sizeof(tx_buffer), "Motion Detected!\r\n");
            tx_com(tx_buffer, strlen((char const *)tx_buffer));
          }
        }
      } while (func_status.pres_flag);
    }
  }
}

 
I can read the Device ID correctly and all the I²C transactions are working. For now, I’m not using interrupts, so I modified line 41 accordingly. I also changed line 38 to set the ODR as STHS34PF80_ODR_AT_4Hz, because sths34pf80_odr_set() fails when I use STHS34PF80_ODR_AT_30Hz.

I am expecting the breakpoints to hit  line number 60 or line number 76 when I bring my hand closer to the sensor but it does not. Can you please help me get this working? I am using STEVAL-MKI231KA.