Razor Serial Port

I have a Razor 9DoF with the ATSAM21 ARM M0 processor.

How do you set up the external serial port? I want to connect the GPS Mouse.

The M0 device has extra UART peripherals and I want to use the pins marked as Rx and Tx.

How do you do this?

All other examples use software UARTS.

Check out:

  • - The end of this section in the hookup guide: [https://learn.sparkfun.com/tutorials/9d ... no-library](https://learn.sparkfun.com/tutorials/9dof-razor-imu-m0-hookup-guide#using-the-mpu-9250-dmp-arduino-library)
  • - The comments section of the hookup guide: [https://learn.sparkfun.com/tutorials/9d ... de/discuss](https://learn.sparkfun.com/tutorials/9dof-razor-imu-m0-hookup-guide/discuss)