BMA400 interrupt pin mapping

[baukespoelstra]

Hello,

I am trying to map my Activity change interrupt to a physical interrupt to trigger the host MCU. (nrf52805)

I can succesfully read the interrupt with bma400_get_interrupt_status.

My code for setting pin as output for the interrupt is as below:

    int_en.type = BMA400_ACTIVITY_CHANGE_INT_EN;

    int_en.conf = BMA400_ENABLE;

    rslt = bma400_enable_interrupt(&int_en, 1, &bma);

    bma400_check_rslt("bma400_enable_interrupt", rslt);

    dev_settings[0].type = BMA400_INT_PIN_CONF;

    dev_settings[0].param.int_conf.int_chan = BMA400_MAP_BOTH_INT_PINS;

    dev_settings[0].param.int_conf.pin_conf = BMA400_INT_PUSH_PULL_ACTIVE_0;

    rslt = bma400_set_device_conf(dev_settings, 1, &bma);

    bma400_check_rslt("bma400_set_device_conf", rslt);

Also attached it. I can not get it working with the physycal pin. Am i missing something?

I am measuring with an oscilloscope.

[BSTRobin]

Hi baukespoelstra,

You could add this line of code and check if INT1 pin output interrupt signal.
accel_settin[0].param.act_ch.int_chan = BMA400_INT_CHANNEL_1;

[baukespoelstra]

Hi,

This was already in the code i attached.

    accel_settin[0].type = BMA400_ACTIVITY_CHANGE_INT;
    accel_settin[1].type = BMA400_ACCEL;

    rslt = bma400_get_sensor_conf(accel_settin, 2, &bma);
    bma400_check_rslt("bma400_get_sensor_conf", rslt);

    accel_settin[0].param.act_ch.int_chan = BMA400_INT_CHANNEL_1;
    accel_settin[0].param.act_ch.axes_sel = BMA400_AXIS_XYZ_EN;
    accel_settin[0].param.act_ch.act_ch_ntps = BMA400_ACT_CH_SAMPLE_CNT_64;
    accel_settin[0].param.act_ch.data_source = BMA400_DATA_SRC_ACC_FILT1;
    accel_settin[0].param.act_ch.act_ch_thres = 10;

    accel_settin[1].param.accel.odr = BMA400_ODR_100HZ;
    accel_settin[1].param.accel.range = BMA400_RANGE_2G;
    accel_settin[1].param.accel.data_src=BMA400_DATA_SRC_ACCEL_FILT_1;

    /* Set the desired configurations to the sensor */
    rslt = bma400_set_sensor_conf(accel_settin, 2, &bma);
    bma400_check_rslt("bma400_set_sensor_conf", rslt);

[baukespoelstra]

Update:

It turns out the INT pins are swapped on the MIKROE-3149 BMA400 evkit.

If I set INT1, I can measure at INT2. Checked with the datasheet, the pins are changed.

[BSTRobin]

Hi baukespoelstra,

You could refer the example code in your other topic: https://community.bosch-sensortec.com/t5/MEMS-sensors-forum/Inactivity-detection-with-BMA400/td-p/58...