Interacting With The Board - OLIMEX AM3352-SOM User Manual

OLIMEX© 2015 AM3352-SOM user's manual

3.5 Interacting with the board

The typical and recommended way of interacting with AM3352-SOM board is via a serial cable
connected between the UART0 header and a personal computer. You would probably need a cable
suitable for such a connection due to the fact that most personal computers lack a serial port
nowadays. Even if you have serial port you should respect the CMOS levels of the board which are
incompatible with the TTL levels of your computer. We distribute a ready-to-use plug-and-play
cable – it is called USB-SERIAL-CABLE-F. Even if you already have such a cable or you decide to
purchase it elsewhere it is advisable to check this product page for a reference:
https://www.olimex.com/Products/Components/Cables/USB-Serial-Cable/USB-Serial-Cable-F/
You need to connect the cable to the UART0 pins as follows: RX line to TX pin; TX line to RX pin;
GND to GND. Make sure that the serial cable is connected to your personal computer and
recognized properly after driver installation. After the hardware connection is established, open a
terminal program on the serial (COM) port which the cable is associated with. The typical baud rate
is 115200, the rest of the settings should be left as per default.
After everything else is set, you would need to power the board as explained in "3.3 Powering the
board".
The default username/password combination of the official images is: olimex/olimex.
In order to save time you might want to log as super user initially. The reason is that most
commands require super user privileges. To log as super user execute "sudo su" and write the
password.
If AM3352-SOM is attached to AM3352-SOM-EVB, in addition to the serial communication, you
might also use one or more of the following mediums to interact with the board:
1. a monitor via the DE-15 VGA connector
2. SSH with a remote computer via one of the Ethernet connectors (LAN1 or LAN2)
3. a compatible display via the LCD connector
Refer to the AM3352-SOM-EVB's datasheet for more information on each connection.
Note that not all interface options are available for all images.
Using VGA, LCD or LAN might require additional configurations. Furthermore, it is possible to
corrupt the output settings over those interfaces and, thus, lose the output. In such cases, you can
always use the serial cable USB-SERIAL-CABLE-F as a reliable way to establish connection to the
board.
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