In this section, you will access the Linux terminal through the debug UART interface and learn basic useful Linux commands. In this module you will:
Note: We will access the module using the Serial Terminal, therefore the USB keyboard and video interface connected to the module will not be used in this section.
Open a terminal in the host machine:
Add your user to dialout group:
sudo adduser user dialout
Warning: Change the user on the command above to your system username.
Warning: After the command it is necessary to reboot or logoff the system.
Install a serial terminal emulator application in your host computer:
sudo apt-get install gtkterm
Open GTKterm, you can do it from your distro menu or from the terminal:
To start the serial application, the parameters must be correctly set. From GTKTerm menu, select configuration->port:
From the configuration window, select the serial device that corresponds to your module:
Note: Generally the last device listed on Port combo box (/dev/ttyUSB0) is the device you want. But if you have more than one usb serial connected, there will be more options listed e.g. /dev/ttyUSB1, /dev/ttyUSB2 and etc... To find out which one is the serial port device that you must use, you can unplug the USB-Serial adapter --> close the configuration window --> open it again and find the new device listed.
With the device selected we need to set the correct baud rate 115200:
With this configuration click "Ok" button to connect:
Power-on the embedded system. Messages will immediately start to be printed to the serial terminal. When the module finishes booting, you will have a terminal such as from the image below. This means that you have access to the serial terminal of the system, and that it has Windows CE pre-installed. In the next section, you will update the module OS to Linux.
Note: In some cases, it is needed to close or to reconnect to the serial port, you can do it by pressing F5 to connect/reconnect and F6 to close, or use the Control signals menu: