1. First check the Linux kernel version on the target board with the following command:

uname -r

It must be 3.16.0 or above.

2. Make sure the serial ports are initialized properly in the kernel by running command:

dmesg | grep tty

You should see something similar to the following:

[ 0.000000] console [tty0] enabled
[ 2.159659] 0000:00:1e.3: ttyS0 at MMIO 0xd0820000 (irq = 18, base_baud = 2764800) is a 16550A
[ 2.160221] 0000:00:1e.4: ttyS1 at MMIO 0xd081e000 (irq = 19, base_baud = 2764800) is a 16550A

On 32 bit Ubuntu 14.04.2 there may be a message “failed to request DMA” but it should be OK. Serial ports should still work. Note: It is important that the user checks kernel version and serial port names with commands in steps 1 & 2 before setting up Minicom. Normally, the port names show up as ttyS0 & ttyS1, but on Ubuntu 14.04.2 they are ttyS4 & ttyS5

3. Start Minicom with the following command:

sudo minicom –s

If Minicom is not already installed, install it with command:

sudo apt-get install minicom

1. On the popup menu, select “Serial port setup” -> Select “A” -> Change Serial Device to your desired COM port. E.g: /dev/ttyS0
2. Hit [Enter] twice to set serial port config information to Minicom
3. Select “Save setup as dlf”
4. Select “Exit”
5. Set up a second test station with Minicom or compatible terminal program.
6. With an RS -232 null modem cable, connect the active serial ports between both test stations
(Amazon: Null Modem Cable)
7. Type something on the Minicom console of the first ADLE3800PC board that data should appears on the terminal console on the second system.

Note: The procedure above has been verified on the following Linux distros:

1. Debian 8.1.0 –i386 with kernel 3.16.0
2. Fedora 22 –x86_64 with kernel 4.1.3
3. Ubuntu 14.04.2 –i386 with kernel 3.16.0
4. Lubuntu 14.04.3 –i386 with kernel 3.19.0