BMI270 about interrupt

[jimit007]

Hi, jimit here, I built my own BMI270 API for Arduino boards, and I have a question regarding the BMI270 interrupt function, I want to generate an interrupt Acceleration sensor data. but to us, a surprise interrupt generates without attaching an interrupt pin attach, and I don't know how? can you guide me? here is my code.

IMU imu = IMU(Wire);

BMI imu1 = BMI();

void setup()

{

  Serial.begin(57600);

  Wire.begin();

  Wire.setClock(400000UL);

  delay(100);

  // imu.start();

  // imu.setConfig();

  // pinMode(9, INPUT);

  // attachInterrupt(9, drdy, RISING);

  imu1.start();

  imu1.setInterruptPin();

  imu1.setConfig();

}

void loop()

{

  // uint8_t buf[12] = {0};

  int16_t ax = 0, ay = 0, az = 0;

  // int16_t x1 = 0, y1 = 0, z1 = 0;

  float x, y, z;

  // imu.readAccSensor();

  // x = imu.getAccl_X();

  // y = imu.getAccl_Y();

  // z = imu.getAccl_Z();

  imu1.getINTstatus(&int_status);

  int ret = ((int_status | _int_status) & BMI2_ACC_DRDY_INT_MASK);

  _int_status = int_status;

  _int_status &= ~BMI2_ACC_DRDY_INT_MASK;

  // Serial.println(int_status);

  if (ret)

  {

    imu1.getAccData();

    ax = imu1.get_accX();

    ay = imu1.get_accY();

    az = imu1.get_accZ();

    Serial.print(ax);

    Serial.print(",");

    Serial.print(ay);

    Serial.print(",");

    Serial.println(az);

  }

  Serial.println("new data");

  // imu1.read(0x68, 0x0c, buf, 12);

  // ax = buf[0] | (buf[1] << 8);

  // ay = buf[2] | (buf[3] << 8);

  // az = buf[4] | (buf[5] << 8);

  // x1 = (int16_t)ax;

  // y1 = (int16_t)ay;

  // z1 = (int16_t)az;

  // Wire.beginTransmission(0x68);

  // Wire.write(0x1B);

  // Wire.endTransmission();

  // Wire.requestFrom(0x68, 1);

  uint8_t data = 10;

  data = imu1.check_event_id();

  // while (Wire.available())

  // {

  //   data = Wire.read();

  //   /* code */

  //   // Serial.println(BMI3_GET_BITS(Wire.read(), BMI2_EVENT_FLAG));

  // }

  // Serial.println(BMI3_GET_BITS(data, BMI2_EVENT_FLAG));

  /* Set accelerometer range */

  // reg_data = BMI2_SET_BIT_POS0(data_array[1], BMI2_ACC_RANGE, config->range);

  // Serial.print(",");

  // Serial.print((int16_t)ax);

  // Serial.print(",");

  // imu1.read(0x68, 0x53, buf, 3);

  // Serial.print(buf[0], BIN);

  // Serial.print(",");

  // Serial.print(buf[1], BIN);

  // Serial.print(",");

  // Serial.println();

  delay(5); // Wait for 100ms before reading again

}

void BMI::setInterruptPin()

{

    write(BMI270_ADDRESS, 0x53, B1010);

    delay(2);

    write(BMI270_ADDRESS, 0x55, 0x00);

    delay(2);

    write(BMI270_ADDRESS, 0x58, 0x04);

    delay(2);

}

void BMI::getINTstatus(uint16_t *int_status)

{

    uint8_t data_array[2] = {0};

    read(BMI270_ADDRESS, 0x1C, data_array, 2);

    *int_status = (uint16_t)data_array[0] | ((uint16_t)data_array[1] << 8);

}

uint8_t BMI::write(uint16_t address, uint16_t subAddress, uint16_t data)

{

    Wire.beginTransmission(address);

    Wire.write(subAddress);

    Wire.write(data);

    return Wire.endTransmission();

}

void BMI::read(uint8_t addr, uint8_t reg, uint8_t *buf, uint8_t len)

{

    // uint8_t addr = 0;

    Wire.beginTransmission(addr);

    Wire.write(reg);

    Wire.endTransmission();

    Wire.requestFrom(addr, len);

    while (Wire.available())

    {

        for (uint16_t i = 0; i < len; i++)

        {

            buf[i] = Wire.read();

        }

    }

}

[BSTRobin]

Hi jimit007,

The official BMI270 API is written in C language. You can refer to the code on github: https://github.com/boschsensortec/BMI270-Sensor-API/blob/master/bmi270_examples/accel/accel.c

For the interrupt part of acceleration data ready, you can refer to the following code:

int8_t Open_BMI270_RDRY_INT(struct bmi2_dev *dev)
{
int8_t rslt = BMI2_OK;
struct bmi2_int_pin_config int_cfg;

/* Map data ready interrupt to interrupt pin. */
rslt = bmi2_map_data_int(BMI2_DRDY_INT, BMI2_INT1, dev);
bmi2_error_codes_print_result(rslt);

bmi2_get_int_pin_config(&int_cfg, dev);

int_cfg.pin_type = BMI2_INT1;
int_cfg.pin_cfg[0].lvl = BMI2_INT_ACTIVE_HIGH;/*Config INT1 rising edge trigging*/
int_cfg.pin_cfg[0].od = BMI2_INT_PUSH_PULL;
int_cfg.pin_cfg[0].output_en= BMI2_INT_OUTPUT_ENABLE;

bmi2_set_int_pin_config(&int_cfg, dev);
bmi2_error_codes_print_result(rslt);

return rslt;
}