Serial Port Setup

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Serial Port Setup[edit]

When developing on a dev kit, they are often found with debug serial ports to monitor and interact with the device in almost all circumstances. We can fall back to this mode to observe the boot sequence, interact with the boot loader, perform initial setup, and fix configuration errors. Find the UART port, which may be a serial port or possible a USB port that emulates a serial port. When plugged into the host computer, we should be able to talk to the device using a standard serial terminal application like minicom or screen. Look for a device named something like:

  • /dev/ttyS0 (serial port)
  • /dev/ttyUSB0 (serial over USB)
  • /dev/ttyACM0 (serial over USB)

See your device's documentation for specifics on the serial port parameters to set.