Debian OS

Debian OS User Manual

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This manual provides users with a fast guide of Chipsee Industrial Computer (Abbreviated as IPC) about Debian OS development. Through this manual, users can quickly understand the hardware resources; users can debug Debian OS via serial and Internet.

Revision

Date

Author

Description

V1.0

2021-12-09

Randy

Initial Version

SUPPORTED BOARDS:

CS80480T050 CS80600T080 CS10600T070 CS80480T070 CS10768T097

PREBUILT FILES PACKAGE:

Prebuilt files for the various industrial PCs can be found in the OS Downloads.
Below are the links to the prebuilt files for each industrial PC model.

System Features

Feature

Comment

System

Debian 7.4 & Debian 8.4

Preparation

You will need to prepare the following items before you can start using the Prebuilt Files Package to re-flash the system.

  • Power Supply Unit (PSU) with the appropriate voltages, as follows:

    • Products with 5” display panel require 6V to 36V PSU

    • Products with 7” to 10.1” display panel and larger require 6V to 42V PSU

  • USB to serial cable for debugging Chipsee Industrial Embedded Computers (Chipsee IPC)

  • TF Card to create a bootable storage for re-flashing the system. Use the prebuilt files link above to re-flash the system.

Hardware Requirements

  • Chipsee Industrial PC

  • PSU according to the instructions above

  • USB-to-serial or other serial cable for debugging

  • TF Card (at least 4GB) and card reader

  • USB A-A cable (used only if the hardware configured as OTG)

  • Windows 7 PC

Software Requirements

  • Debian OS Prebuilt Files Package (from the link above)

Note

In this documentation, all the commands are executed with root user privileges.

Getting Started and Tests

DIP Switch Configuration

Set the boot DIP switch, as shown on the figure below, to boot the system from the external SD Card.

../../../../../_images/Boot_SW2.jpeg

Figure 677: Boot Mode Setup

Downloading Images

Chipsee IPC supports booting from an integrated eMMC or an external TF Card (also known as the micro SD card). Booting from the external TF Card allows flashing the system OS.

Note

The operator should use the prebuilt file we provided in the CD to test the hardware before re-flashing the system.

Prebuilt Files Package

You can get the Prebuilt Files Package for each model from links mentioned at the beginning of this documentation. You can also get the Prebuilt Files Package from the DVD in /Debian/Prebuilds folder. However, it may be outdated so always compare the versions (the last number in the filename is the release date).

The prebuilt package has the following content:

Table 145 Prebuilt Files Package

Contents

Comment

boot/imx6ulipc.dtb

TF Card boot dtb file

boot/u-boot.imx

TF Card boot bootloader

boot/zImage

TF Card boot kernel file

filesystem/rootfs-emmc-flasher.tar.bz2

TF Card boot rootFS

mksdcard.sh

Shell tools to make bootable TF Card

README

Simple guidelines

S1.jpg

Boot Switch Config Figure

emmc-flash/emmc/rootfs.tar.gz

RootFS in target eMMC

emmc-flash/emmc/u-boot.imx

Bootloader in target eMMC

emmc-flash/emmc/zImage

Kernel file in target eMMC

emmc-flash/emmc/imx6ul-eisd.dtb

dtb file in target eMMC

emmc-flash/mkemmc.sh

Shell tools to download images

Note

The default zImage and imx6q-sabresd.dtb files support ‘keep the logo from uboot to kernel’ but do not support framebuffer. Chipsee provides zImage_framebuffer and imx6q-eisd.dtb_framebuffer file versions that support the framebuffer function but do not support the ‘keep the logo from uboot kernel’ feature. If you need the framebufer, just rename these two files to zImage and imx6q-eisd.dtb.

How to make a bootable SD card

The Prebuilt Files Package has a shell tool that can help create a bootable SD card using a Linux platform (such as desktop PC or Virtual Machine running Ubuntu 14.04 distribution).
Use the SD Card to download the bootable system image onto the Linux platform and follow the steps below to create a bootable SD card:

  1. Copy the Prebuilt Files Package to a Linux environment (such as Ubuntu 14.04).

  2. Insert the SD card into your computer. If you are using virtual machines, please ensure the SD card is mounted to the Linux operating system.

  3. Confirm the SD card mount point, /dev/sdX,(e.g., /dev/sdc or /dev/sdb, be sure to use the right one). In a Linux system, you can use the command below to find out what X is.
    $ sudo fdisk –l
    
  4. Copy the prebuilt-som-v3-csrrrrrtss-v3-debian-sd-yyyymmdd.tar.gz to somewhere(such as $HOME).

  5. Extract the prebuilt-som-v3-csrrrrrtss-v3-debian-sd-yyyymmdd.tar.gz
    $ tar -xzvf prebuilt-som-v3-csrrrrrtss-v3-debian-sd-yyyymmdd.tar.gz
    
  6. Go to the folder
    $ cd ~/prebuilt-som-v3-csxxxxxtxx-v3-ezsdk-sd-yyyymmdd
    
  7. Use the following command to flash the Debian OS to the SD card
    $ sudo ./mksdcard.sh --device /dev/sd<?>
    

    Note

    • sd<?> means the SD card mount point, (e.g., /dev/sdc or /dev/sdb) in Ubuntu system.

    • The recommended SD card should be Sandisk Class4 level SD card or above.

  8. The bootable SD Card is now ready. Power OFF the industrial PC and insert the SD Card.

  9. Set the DIP switch to uSD BOOT mode. (refer to DIP Switch Configuration above)

  10. Connect the industrial PC to PC via COM1. Power ON the IPC.

  11. After 20 minutes, if the LED on industrial PC stays lit, flashing is completed. Using COM1, you can also find this message >>>>>>> eMMC Flashing Completed <<<<<<< which indicates that the system image was downloaded correctly to the eMMC.

  12. Power OFF the IPC and set the DIP switch to eMMC BOOT mode. (refer to DIP Switch Configuration above)

How to flash Linux to eMMC

The Prebuilt Files Package has a shell tool that can help create a bootable SD card using a Linux platform (such as desktop PC or Virtual Machine running Ubuntu 14.04 distribution).
Follow the steps below to create a bootable SD card:

  1. Copy the Prebuilt Files Package to a Linux environment (such as Ubuntu 14.04).

  2. Insert the SD card into your computer. If you are using virtual machines, please ensure the SD card is mounted to the Linux operating system.

  3. Confirm the SD card mount point, /dev/sdX,(e.g., /dev/sdc or /dev/sdb, be sure to use the right one). In a Linux system, you can use the command below to find out what X is.
    $ sudo fdisk –l
    
  4. Copy the prebuilt file prebuilt-som-v3-csrrrrrtss-v3-debian-emmc-yyyymmdd.tar.gz to somewhere(such as $HOME).

  5. Extract the prebuilt file prebuilt-som-v3-csrrrrrtss-v3-debian-emmc-yyyymmdd.tar.gz
    $ tar -xzvf prebuilt-som-v3-csrrrrrtss-v3-debian-emmc-yyyymmdd.tar.gz
    
  6. Go to the folder prebuilt-som-v3-csrrrrrtss-v3-debian-emmc-yyyymmdd/
    $ cd ~/prebuilt-som-v3-csrrrrrtss-v3-debian-emmc-yyyymmdd
    
  7. Use the following command to flash the Debian OS to the SD card
    $ sudo ./mksdcard.sh --device  /dev/sd<?>
    

    Note

    • sd<?> means the SD card mount point, (e.g., /dev/sdc or /dev/sdb) in Ubuntu system.

    • The recommended SD card should be Sandisk Class4 level SD card or above.

  8. The bootable SD Card is now ready. Power OFF the industrial PC and insert the SD Card.

  9. Set the DIP switch to SD BOOT mode. (refer to DIP Switch Configuration above)

  10. Connect the industrial PC to PC via COM1. Power ON the IPC.

  11. After 20 minutes, if the LED on industrial PC stays lit, flashing is completed. Using COM1, you can also find this message >>>>>>> eMMC Flashing Completed <<<<<<< which indicates that the system image was downloaded correctly to the eMMC.

  12. Remove the SD card and Power OFF the IPC.

  13. Set the DIP switch to eMMC BOOT mode (refer to DIP Switch Configuration above) and Power ON the IPC.

Start Debian OS

The first time you start Debian OS on the industrial PC will take a little time. But after the first time, Debian OS will start quickly. When the Debian OS starts up, you will see the Chipsee Logo on the LCD screen. It is a successful start if you see the Debian OS desktop such as the one shown in the figure below:

../../../../../_images/Startup_Screen2.jpeg

Figure 678: Debian OS start-up screen

Tests

Touch screen and buzzer test

Click on the screen, the mouse arrow stays in a position that triggers the buzzer sounds, indicating that touch and buzzer work properly.
After working for some time, the resistive touch screen may not be accurate. The user must run a touch screen calibration test.
Firstly delete the file /etc/pointercal.xinput using the command below.

$ sudo rm /etc/pointercal.xinput

Click on the Preferences–>Calibrate Touchscreen app to recalibrate.
Reboot the system. You will see the calibrate app upon boot up before you access the system. Just calibrate, the result will be saved.

The buzzer will sound when the screen is touched, if you want to disable it, you can do this:

  • On capacitive touchscreen:
    # echo 0 > /sys/devices/ocp.3/44e0b000.i2c/i2c-0/0-0038/buzopen
    
  • On resistive touchscreen:
    # echo 1 > /sys/devices/ocp.3/44e0d000.tscadc/tsc/buzopen
    
    where:
    • 0 = disable

    • 1 = enable

Audio test

Start the terminal, then use the mplayer command to play an audio file.

# mplayer FILENAME  //such as: mplayer ~/Music/test.mp3

Serial test

There are four serial ports on the Chipsee IPC: 2 X RS232 and 2 X RS485. The COM1(RS232) is used as the debug serial port. Users can communicate with the OS via COM1. Refer to the table below for the available serial device nodes.

Table 146 Serial Ports Nodes on the System

Ports

Device Node

COM1(RS232, Debug)

/dev/ttyO0

COM2(RS232)

/dev/ttyO1

COM3(RS485)

/dev/ttyO2

COM4(RS485)

/dev/ttyO4

If you want to use COM1 as a normal serial port, you can re-configure the port by following these steps:

  • Open and edit the file /etc/inttab with any text editor.

  • At the end of the file, edit this line T0:23:respawn:/sbin/getty –L ttyO0 115200 vt102 to

# T0:23:respawn:/sbin/getty –L ttyO0 115200 vt102
  • The code-block above, comments off the last line making it possible to use all the four serial ports as normal serial ports.

  • You can verify the changes by running a serial test.

  • Run a serial test:
    • Install SecureCRT or Putty software on a Windows 7 PC and use it to perform the serial port testing.

    • Connect COM2 on the industrial PC to Windows 7 PC. Set BAUD as 9600.

    • Send an echo through the terminal as shown in the code block below.

    echo "This is a test" > /dev/ttyO1
    
    • You will see the string on the SecureCRT or Putty software running on the Windows 7 PC.

    • Change ttyO1 to ttyO2/ttyO4 to test RS485.

GPIO test

There are (4) four input and (4) four output pins. LOW is 0V, HIGH is 5V.
The GPIO input terminals connect to the GPIO output terminals, respectively. IN1-4 corresponds to OUT1-4.
As a result, if you set the GPIO_OUT area, you will see the GPIO_IN region change as well.
You can control the LED light on the industrial PC by setting the LED ON or OFF.

Table 147 GPIO Nodes on the System

GPIO

GPIO In System

OUT1

gpio49

OUT2

gpio50

OUT3

gpio51

OUT4

gpio52

IN1

gpio53

IN2

gpio54

IN3

gpio55

IN4

gpio56

USER_LED

gpio19

You can read and write the GPIO by following the steps below. For this example, we are going to use gpio49(OUT1).

  • Use this command to export gpio.
    # echo 49 > /sys/class/gpio/export
    
  • Use this command to check if the directory /sys/class/gpio/gpio49/ exist before writing to it
    # find /sys/class/gpio/gpio49/
    
  • Use this command to write gpio
    # echo 1 > /sys/class/gpio/gpio49/value
    
  • Use this command to read gpio
    # cat /sys/class/gpio/gpio49/value
    

Network

Use this command to view the network information on the industrial PC.
# ifconfig –a

Date and Time

  • Check the system time
    # date
    
  • Set the system time
    # date –s "2014-03-15 10:30:30"
    
  • Check RTC
    # hwclock
    
  • Write RTC
    # hwclock -w
    
  • Modify the time zone to a different timezone, such as China
    # ln -sf /usr/share/zoneinfo/Asia/Hong_Kong /etc/localtime
    

Backlight

Modify this file /sys/class/backlight/backlight to adjust the screen brightness. Brightness ranges from 0 to 100 where 0 means no backlight, and 100 is the MAX brightness value.
For example, you can adjust the screen brightness using this command:

# echo 50 > /sys/class/backlight/backlight.10/Brightness

USB device

The Debian OS supports USB-WiFi (RTL8723). If you want to get USB-Wifi module to work, you need to edit file: /etc/network/interfaces as shown in the code-block below.

# Wifi Example
allow-hotplug wlanX
auto wlanX
iface wlanX inet dhcp
wpa-ssid "Chipsee"   # Router’ name
wpa-psk "1234567890" # Passwd

**wlanX** usual should be ``wlan0``, you can use the command ``ifconfig –a`` to make sure of that.

Debian OS debug

In this section, we will discover how to view the Debian system via the serial port on a Windows 7 PC.
Also, we will discover how to debug using NFS on a Ubuntu Linux PC.

View Debian system via the serial port

Install the SecureCRT or Putty software on a Windows 7 PC to view the Debian system via the serial ports.
Follow these steps to view Debian system via the serial port:

  • Connect COM1 on the industrial PC board to Windows 7 PC.

  • Open the SecureCRT or Putty software on the Windows 7 PC.

  • Power ON the industrial PC. You will see the serial output information as shown on the figure below.

  • When the system is fully booted, you can communicate with it by logging in with these details: user= debian or root and password= chipsee or root.

../../../../../_images/Serial_Debug.jpeg

Figure 683: Serial output information

Debug via NFS

  1. Install NFS on Ubuntu Linux PC.
    $ sudo apt-get install nfs-kernel-server
    
  2. Configure the file /etc/exports, by adding this line at the end of the file.
    /qtprojects *(rw, sync, insecure, no_subtree_check)
    

    Note

    • /qtprojects: the shared folder in Ubuntu system

    • *: allows all other PC to get access to this system

    • rw: means this folder can be read and write by NFS client

    • sync: synchronous write memory and hard disk

    • insecure: sent message through the port above 1024

    • no_subtree_check: no check the parent directory permissions

  3. Restart NFS service.
    $ sudo /etc/init.d/portmap restart
    $ sudo /etc/init.d/nfs-kernel-server restart
    
  4. Test
    $ showmount -e
    

    or mount the shared folder to /mnt:

    $ sudo mount -t nfs –o nolock localhost:/qtprojects /mnt
    

    Use the command df to check out the result, then umount.

    $ df -h
    $ sudo umount /mnt
    
  5. Mount NFS on the industrial PC running Debian OS.

    Create the nfsdir directory

    # mkdir /nfsdir
    

    Mount the folder /qtprojects on the Ubuntu Linux PC to /nfsdir on the industrial PC.

    # mount –t nfs :/qtprojects /nfsdir
    

    If you have an executable program like SerialTest under folder /qtprojects, you can run it directly on the industrial PC.

    # /nfsdir/SerialTest
    

Debian App Development

In this section, we will set up the Java environment and show you how to a make simple Java application.

Preparation

Download and install a Java jdk.
# sudo apt-get install openjdk-6-jdk

Example — Develop a HelloWorld.java Program

  1. Open and edit, with any text editor, a simple java HelloWorld.java program.
     1import java.awt.Color;
     2import java.awt.Font;
     3import java.awt.Toolkit;
     4import javax.swing.JFrame;
     5import javax.swing.JTextField;
     6
     7public class HelloWorld extends JFrame{
     8    public HelloWorld(){
     9         JTextField text = new JTextField("Hello, world!");
    10         text.setFont(new Font("Times New Roman",Font.BOLD,60));
    11         text.setForeground(Color.BLACK);
    12         this.getContentPane().add(text);
    13     }
    14    public static void main(String argv[]){
    15         HelloWorld win = new HelloWorld();
    16         Toolkit tk  = Toolkit.getDefaultToolkit();
    17         int winWidth = 512;
    18         int winHeight = 300;
    19         int Width  = tk.getScreenSize().width;
    20         int Height = tk.getScreenSize().height;
    21         win.setSize(winWidth, winHeight);
    22         win.setLocation((Width-winWidth)/2, (Height-winHeight)/2);
    23         win.setVisible(true);
    24         win.setDefaultCloseOperation(EXIT_ON_CLOSE);
    25     }
    26}
    
  2. Compile the source.
    # javac HelloWorld.java
    

    This will be very slow in Debian OS, we suggest do it in your PC, you need install jdk-1.6 first.

  3. Run the program.
    # java HelloWorld
    

    You will see something similar as the figure below.

    ../../../../../_images/Hello_World.jpeg

    Figure 684: Hello World Program

  4. Adding the Java program to Quick Start.
    • Make a directory
      # mkdir /usr/lib/java/
      
    • Copy HelloWorld.class to /usr/lib/java/ directory
      # cp HelloWorld.class /usr/lib/java/
      
    • Open and edit script /usr/bin/HelloWorld.sh with any text editor.
      1#!/bin/bash
      2cd /usr/lib/java/
      3java HelloWorld
      
    • Change the permissions of the script.
      # sudo chmod a+x HelloWorld.sh
      
    • Edit file /usr/share/applications/javatest.desktop.
      [Desktop Entry]
      Name=HelloWorld
      Comment=Simple test for Java
      Exec=/usr/bin/HelloWorld.sh
      Icon=/usr/share/pixmaps/chipsee.png
      Terminal=false
      Type=Application
      Categories=GTK;Utility;GNOME;
      
    • This is the result:
      ../../../../../_images/Hello_World_2.jpeg

      Figure 685: Hello World Program

  5. Auto-Launch Java app

    Add script 89javatest in directory /etc/X11/Xsession.d/.

    #!/bin/bash
    cd /usr/lib/java/
    java HelloWorld
    

    Now when you Reboot the system, the HelloWorld app will automatically launch.

Technical Support

Please feel free to contact us with any questions, queries or suggestions.

If your question is related to technical support or troubleshooting for one of our products, we kindly ask you to check our documentation for a possible solution first.

If you still cannot find the solution you are looking for, please write to Chipsee Technical Support at service@chipsee.com, providing all relevant information.





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Disclaimer:

Chipsee assumes no responsibility for any errors that may occur in this manual. Furthermore, Chipsee reserves the right to alter hardware, software, and/or specifications set forth herein at any time without prior notice, and undertakes no obligation to update the information contained in this document. Chipsee products are not authorized for use as critical components in life support devices or systems.