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I want to use both IMU at the same time using the Sparkfun Library on a SAMD21 mini breakout board. Can anyone help?

The begin function is :

inv_error_t MPU9250_DMP::begin(void) {
  inv_error_t result;
  struct int_param_s int_param;
  Wire.begin();
  result = mpu_init(&int_param);
  if (result)
    return result;
  mpu_set_bypass(1); // Place all slaves (including compass) on primary bus
  setSensors(INV_XYZ_GYRO | INV_XYZ_ACCEL | INV_XYZ_COMPASS);
  _gSense = getGyroSens();
  _aSense = getAccelSens();
  return result;
}
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    Have you tried to do it? – Code Gorilla May 12 '17 at 9:13
  • yes i tried but when connecting them togher i got the same data for both,actually i'm trying to modify the library to have to imu with two adresse 0x68 and 0x69 – samibe May 12 '17 at 9:26
  • I have the same problem now. the function is burried in 3rd lvl of libraries.. Where did you change the code? – Rene Kaminski Nov 16 '17 at 14:53
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Sorry, but I'm not 100% sure of what you are trying to do, I don't understand 'both imu the' in your question. I think you are trying to use two identical boards at the same time. (If not tell me so I can edit my answer)

You will need to modify the library so the begin function takes a parameter. That parameter for MPU9250_DMP::begin then identifies the address of the device, this will need passing to Wire.begin() I think (you'll need to check the Wire.begin() function, I can't).

That should let you create two different instances of the class.

MPU9250_DMP apple;
MPU9250_DMP banana;
apple.begin(0x68);
banana.begin(0x69);
  • yes i want to use this but in the begin function there is no parameter to pass – samibe May 12 '17 at 10:11
  • Erm, whoops, I missed a line out of the answer. You need to change the library so begin() takes a parameter. Sorry for the confusion. – Code Gorilla May 12 '17 at 10:18
  • thank you, i'm trying to modify it, now i'll test it and i'll give you the response – samibe May 12 '17 at 10:25
  • i changed the library,the problem is there is no data displayed ,when debugging even when i Print Something in the serial nothing displayed – samibe May 12 '17 at 12:43

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