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TKCK.1
Visitor II
March 16, 2021
Solved

LSM6DS3 PEDOMETER

  • March 16, 2021
  • 2 replies
  • 1905 views

Hi,

I'm trying to read step counts. I'm executing all pedometer related functions, but I get no any output.

Sincerely,

Talha0693W000008x0OXQAY.png0693W000008x0OhQAI.pngAnd While Loop

0693W000008x0P6QAI.png 

    This topic has been closed for replies.
    Best answer by TKCK.1

    Hi @Eleon BORLINI​ ,

    I applied the configurations in the application note as mentioned. But the result is the same, negative.

    static void pedoConf(void)
{
 /* Holds reset variable. */
 uint8_t rst = 0;
 lsm6ds3_reset_set(&g_dev_ctx, PROPERTY_ENABLE);
 do
 {
 lsm6ds3_reset_get(&g_dev_ctx, &rst);
 }while(rst);
 /* Enable Block Data Update */
 lsm6ds3_block_data_update_set(&g_dev_ctx, PROPERTY_ENABLE);
 
 lsm6ds3_int1_route_t int1_route_t;
 /* Set Output Data Rate for Acc and Gyro */
 lsm6ds3_xl_data_rate_set(&g_dev_ctx, LSM6DS3_XL_ODR_26Hz);
 lsm6ds3_gy_data_rate_set(&g_dev_ctx, LSM6DS3_GY_ODR_26Hz);
 lsm6ds3_xl_full_scale_set(&g_dev_ctx, LSM6DS3_2g);
 lsm6ds3_gy_full_scale_set(&g_dev_ctx, LSM6DS3_2000dps);
 
 /* Enable pedometer */
 lsm6ds3_****_sens_set(&g_dev_ctx, 1);
 
 lsm6ds3_pin_int1_route_get(&g_dev_ctx, &int1_route_t);
 int1_route_t.int1_step_detector = PROPERTY_ENABLE;
 lsm6ds3_pin_int1_route_set(&g_dev_ctx, &int1_route_t);
 lsm6ds3_int_notification_set(&g_dev_ctx,LSM6DS3_INT_LATCHED);
 
 /* Reset steps of pedometer */
 lsm6ds3_****_step_reset_set(&g_dev_ctx, PROPERTY_ENABLE);
}

    I checked the lsm6d3_****_sens_set(), whether it is setting or not the related registers. All the registers we want, as mentioned in the application note, are setting with this function.

    /**
 * @brief Enable pedometer algorithm.[set]
 *
 * @param ctx read / write interface definitions(ptr)
 * @param val change the values of ****_en in reg TAP_CFG
 * @retval interface status (MANDATORY: return 0 -> no Error)
 *
 */
int32_t lsm6ds3_****_sens_set(stmdev_ctx_t *ctx, uint8_t val)
{
 lsm6ds3_ctrl10_c_t ctrl10_c;
 lsm6ds3_tap_cfg_t tap_cfg;
 int32_t ret;
 
 ret = 0;
 if (val == PROPERTY_ENABLE){
 ret = lsm6ds3_read_reg(ctx, LSM6DS3_CTRL10_C, (uint8_t*)&ctrl10_c, 1);
 if(ret == 0){
 ctrl10_c.func_en = PROPERTY_ENABLE;
 ret = lsm6ds3_write_reg(ctx, LSM6DS3_CTRL10_C, (uint8_t*)&ctrl10_c, 1);
 }
 }
 if(ret == 0){
 ret = lsm6ds3_read_reg(ctx, LSM6DS3_TAP_CFG, (uint8_t*)&tap_cfg, 1);
 }
 if(ret == 0){
 ret = lsm6ds3_read_reg(ctx, LSM6DS3_TAP_CFG, (uint8_t*)&tap_cfg, 1);
 }
 if(ret == 0){
 tap_cfg.****_en = (uint8_t)val;
 ret = lsm6ds3_write_reg(ctx, LSM6DS3_TAP_CFG, (uint8_t*)&tap_cfg, 1);
 }
 return ret;
}

    I checked that and matched the other IMU's pedometer examples but it didn't work again.

     if(all_source.func_src.step_detected)
 {
 /* Read steps */
 lsm6ds3_number_of_steps_get(&g_dev_ctx, &steps);
 UART_PRINT("Step: ");
 UART_PRINT("%d\n", steps);
 showError(ICON_HEART, NULL, steps, "Steps");
 }

    In while loop, the way that I check if there is a detection or not. What can it possible error and how can I solve it?

    Best regards,

    Talha

    2 replies

    E
    Eleon BORLINI
    ST Employee
    March 16, 2021

    Hi @TKCK.1​ ,

    I'm not sure if I well interpreted your code, but I suggest you to try to implement the in the way it is described in the LSM6DS3 application note AN4650, p.62:

    1 Write 20h into CTRL1_XL // Turn on the accelerometer
// ODR_XL = 26 Hz, FS_XL = ±2 g
2 Write 3Ch into CTRL10_C // Enable embedded functions
3 Write 40h into TAP_CFG // Enable pedometer algorithm
4 Write 80h into INT1_CTRL // Step Detector interrupt driven to INT1 pin

    This deploys the embedded pedometer feature, without the need of additional configuration of parameters such as debouncing and threshold.

    -Eleon

    T
    TKCK.1Author
    Visitor II
    March 24, 2021
    Error while parsing Rich Text Content
    T
    TKCK.1Author
    Visitor II
    March 24, 2021
    Error while parsing Rich Text Content
    O
    Ozone
    Explorer
    March 24, 2021

    Is this related to an issue with your sourcecode, or to this forum ?

    > I'm executing all pedometer related functions, but I get no any output.

    Do you see ANY output from the accelerometer ?

    Do a real-world evaluation, i.e. carry the board around while walking, and record the sensor output.

    Let several different people do it.

    Then you can evaluate possible "step thresholds".

    T
    TKCK.1Author
    Visitor II
    March 24, 2021

    Hi @Ozone​ ,

    Yes, I can read acc&gyro values in all axis(x, y, z). Also I'm able to read Free Fall interrupts, tapping interrupts..

    I have already real-world sensor ouputs, I recorded them. But in our project, firstly we need to read the steps simply. So I need to execute via registers.

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