Manage Serial Port on macOS

When connected to a Mac, the MSP432 LaunchPad shows two serial ports.

Using screen on a Terminal window

Open a Terminal window and run the command to list the available ports.

$ ls /dev/tty.*

You’ll notice the MSP432 provides two serial ports. Try the first and then the second with

$ screen /dev/tty.usbmodem00000001 9600 
$ screen /dev/tty.usbmodem00000004 9600

The first one, /dev/tty.usbmodem00000001, corresponds to the serial console, to be used with Serial.print(), provided it has been configured with Serial.begin(9600).

The second, /dev/tty.usbmodem00000004, is used to upload the sketch, so there is no need to close the Serial console.

Using Energia

On Energia, just select the right serial port with the Tools > Port menu.

Disconnecting the board

Now, it is strongly recommended to always quit the serial console before disconnecting the board.

  • Press ctrl-A ctrl-K for screen on the Terminal window, or
  • Press cmd-W for the serial console on Energia.

This is a bug from macOS about the enumeration of the USB devices.