I am getting Following Compass internal error with following Arducopter Firmware versions.
Hardware FC -CUAV x7+
GPS : CUAV NEO 3 IST8310 Compass.
Scenario 1: AC 4.4.4
After bootup FC compass detect normally then after some times i am getting prearm error that internal error 0x80000 I:386 i2C_isr continuously. please find the screen shot attached below
Scenario 2: AC 4.6.3
getting same error after FC bootup but this time i see Different line number denoting 403 instead of 386.
Then i updated AC 4.7.1 but no such compass internal error was observed even kept for long power On. Going back to previous Firmware’s then immediately saw the Same errror.
i just wanted to know issue related to firmware or Specific I2C compass device. i don’t think its compass because AC4.7.1 i don’t see this error.

