CL-SOM-AM57x: Linux: Debian
Contents
Overview
The example run-time Linux filesystem image for the CompuLab CL-SOM-AM57x System-on-Module / Computer-on-Module is based on Debian 8.2 GNU/Linux Jessie (armhf).
The default Debian Jessie Linux image includes more than 400 software packages. Among them:
- Core system
- Debian package management system
- X11 Windowing System
- Fluxbox desktop manager
- Netsurf browser
- Apache web server
- Samba connectivity suite
- SSH server and client
- ALSA configuration and usage utilities
- Bluetooth tools and daemons
The Getting started page provides a brief introduction on how to install the run-time Linux image.
Using Debian Linux on CL-SOM-AM57x
Connection and Logging In
Use the following username and password to login:
Account with administrative privileges:
cl-debian-armhf login: root Password: 111111
Regular user account:
cl-debian-armhf login: user Password: 111111
To login into the Linux system, you may use a serial console (ttyO2) at 115200 bps, or connect through the network, or use a keyboard and HDMI display.
X Windows system
CompuLab DEMO root filesystem image contains fully featured X server system with Fluxbox window manager. Before starting X server, connect USB mouse and keyboard to the system. You can run X server and Fluxbox window manager by typing startx.
Fluxbox window manager
CL-SOM-AM57x Debian Linux features installed Fluxbox package - a lightweight window manager for the X server system.
- Fluxbox provides configurable window decorations, a root menu to launch applications and a toolbar that shows the current workspace name, a set of application names and the current time. There is also a workspace menu which allows you to add or remove workspaces. The slit can be used to dock small applications, e.g. most of the bbtools can use slit.
- Fluxbox can iconify windows to the toolbar, in addition to adding the window to the Icons submenu of the workspace menu.
Visit Fluxbox Wiki and Official home page for more details.
Software Management
Debian Linux image for CL-SOM-AM57x includes all the information required to use Debian package management utilities. You can use apt-get and dpkg out of the box.
Display options
CL-SOM-AM57x evaluation platform has four video output interfaces: HDMI, LCD, DVI, and LVDS. Default configuration of Debian Linux for CL-SOM-AM57x uses HDMI (SB-SOM-AM57x J4 connector) as primary video output.
MMC/SD
The support for MMC/SD card on CL-SOM-AM57x is built into the Linux kernel. To mount the memory card, monitor /proc/partitions to see what partitions were detected on the MMC/SD card. For example, suppose MMC/SD partition you'd like to mount is mmcblk0p1 then:
mkdir -p /mnt/mmcblk0p1 && mount /dev/mmcblk0p1 /mnt/mmcblk0p1
USB 3.0 Dual-Role-Device
CL-SOM-AM57x has USB DWC3 (XHCI) based controller. It features SuperSpeed (SS) USB 3.0 Dual-Role-Device (DRD) subsystem with integrated SS (USB3.0) PHY and HS/FS (USB2.0) PHY. Current Linux kernel support of DWC3 features does not allow dynamic role (host/device) switching in runtime. By default, host role is assigned to CL-SOM-AM57x USB 3.0 port.
RTC
To access the RTC time and date run:
root@cm-debian:~# hwclock Sat Jan 1 00:00:00 2000 -10.011159 seconds
To set the date and write it into the RTC do the following:
root@cm-debian:~# date -s "31 JUL 2015 10:00:00" Fri Jul 31 10:00:00 UTC 2015 root@cm-debian:~# hwclock -w root@cm-debian:~# hwclock Fri Jul 31 10:00:13 2015 -1.066224 seconds
