Hi
I am trying to interface InvenSense MPU9150 motion detector sensor with Tag3 board. I found difficulty when i tried to write 0 on one of register of sensor in order to start sensor. I am very new in I2C programming. I posted function below kindly look into this. Thanks
UINT8 sensor_app_writeSensor(UINT8 register_address, UINT8 data)
{
UINT8 read_status;
UINT8 return_value = 0;
UINT8 reg_data_bytes[2];
reg_data_bytes[0]= register_address;
reg_data_bytes[1] = data;
read_status = i2cm_write(reg_data_bytes, sizeof(reg_data_bytes), MPU9150_I2C_ADDRESS);
ble_trace1("read status=%d\n",MPU9150_PWR_MGMT_1);
switch(read_status)
{
case I2CM_BUSY:
// Transaction did not go through. ERROR. Handle this case.
ble_trace0("\ndone4.\n");
break;
case I2CM_SUCCESS:
// The read was successful.
ble_trace0("\ndone5.\n");
return_value = 1;
break;
case I2CM_OP_FAILED:
// No slave device with this address exists on the I2C bus. ERROR. Handle this.
ble_trace0("\ndone6.\n");
default:
break;
}
return return_value;
}
void motion_sensor_read_and_print_motion_data(void)
{ UINT8 return_value = 0;
INT8 motion_data;
INT16 gcd;
i2cm_init();
/* the default speed is 100kHz, it's not required the speed config. */
i2cm_setSpeed(I2CM_SPEED_400KHZ);
i2cm_setTransactionSpeed();
sensor_app_writeSensor(MPU9150_PWR_MGMT_1, 0);
ble_trace0("\nStarting new measurement.\n");
motion_data=sensor_app_readSensor(MPU9150_ACCEL_XOUT_L,MPU9150_ACCEL_XOUT_H);
ble_trace1("motion_sensor_read_motion_data returned %d\n",motion_data);
}
