Kontron KTAM3874-pITX - Manual (Page 30)

KTD-S0057-I Page 26 DebianTM Linux® BSP
KTAM3874/pITX Software Guide
6 Debian TM Linux ® BSP
6.1 User Login Arguments
For both, serial remote system or terminal root privileges with 'sudo', the arguments are the same
(necessary input in green color):
ktam3874 login: ktam3874
Password: ktam3874
6.2 Video Decoding
The KTAM3874/pITX is not qualified for video decoding, the major focus lies on industrial applications. If
you still want to apply a video player use
MPlayer ('sudo apt-get install mplayer'). Other deployable
programs (e.g. Totem Movie Player or SMPlayer, VLC does not work with the default settings) show strong
dropouts.
For measuring the graphics performance use the
glmark2-es2 benchmark.
6.3 Audio Support
If you have trouble with audio input/output please check the 'alsamixer' settings.
Examples with the command line tool 'amixer':
First select a card with amixer -c KTAM3874 (WM8903 codec) or use amixer -c HDMI
(HDMI ® monitor). Card names are readable in the directory /proc/asound/
For an overview type amixer contents
To change a value type e.g.
amixer cset numid=27 on
You can find some audio files in the directory /usr/share/sounds/ . Play these files with the 'aplay' tool, for
example aplay login.wav .
6.4 KEAPI Interface
The menu item 'Applications x System Tools x KEAPI' offers the practical KEAPI GUI tool. A password is
needed (default:
Kontron ) - this information can also be detected in the 'Kontron EAPI for Linux' docu-
mentation but rather hidden.
The KEAPI GUI includes four important components: SerialBus, GPIO, Perf(ormance) and Misc(ellaneous).
Three I2C
TM busses are selectable in the SerialBus tab:
#0 for onboard devices. Normally the access to these devices should be avoided - further
information on request.
#1 for the HDMI ® DDC EEPROM. The graphic driver blocks the access.
#2 provides free access to the I2C TM bus at J2105 (pins 3 and 4).
For GPIO pin assignment see the KTAM3874/pITX User's Guide (chapter 'Digital I/O Interface'). The Perf
tab only allows the switch between 600 and 800 MHz (all available frequencies are listed in the file '/sys/
devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies'). Finally the Misc tab includes the
Watchdog and System State control (only RESTART possible - TURN OFF and HIBERNATE without function).