The use of Unix in embedded computer systems such as networking equipment, mobile phones, media players, set-top boxes, etc.

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Internal Socket Receive Buffer Implementation

I’m working on an embedded application, where i receive some sensor values over UDP. The board I’m using runs the 2.4 kernel on an ARM processor. The problem is the following: once my internal socket ...
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10 views

Zynq SOC Linux Video Driver [on hold]

How Zynq ARM running Linux drives the ADV7511 chip?they have mentioned the necessary signals are generated in the FPGA and video data are sent from ARM linux to the FPGA and to the ADV chip?
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1answer
42 views

F2FS vs ext3/ext4

We are using Beaglebone black Based custom board, we are planning to use eMMC in our board. We are in the process of checking different filesystem options, What are the different file system we can ...
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3answers
1k views

How to remount as read-write a specific mount of device?

How to remount as read-write a specific mount of device? (one folder) The file is "Read-only file system", rw-r-r, so it not allow to change permissions. I need to replace that file, then change ...
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1answer
983 views

Debian and Systemd: breaking ordering cycle error

I'm a new embedded developer I'm trying to make systemd 37 work with freescale vybrid board (A5 and M4) running on linux-3.0 After boot with some breaking ordering cycle error, I check with ps ...
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2answers
603 views

Adding Buildroot Package

I'm trying to add a package to buildroot, but I'm not having much success. The package I'm trying to add is an autotools package called scew. I've followed the buildroot guidelines about adding ...
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1answer
639 views

How to change hard disk spin-down time on my WD MyBook Live?

I have a 2TB Western Digital MyBook Live. It works quite well and provides a web-based administration interface. There is an option to either enable or disable power saving mode, which spins down the ...
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1answer
387 views

Embedded linux LCD not calibrated

I have attached a new LCD to my embedded Linux device and when I run the system I found that it is shifted to the right. (the display starts from the middle of the LCD) I found 2 frame buffer drivers ...
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2answers
1k views

Attaching USB-Serial device with custom PID to ttyUSB0 on embedded

I'm attempting to get an FTDI USB-Serial device with a custom PID to automatically (or even manually) attach to ttyUSB%n, without much success. The device's normal VID/PID is 0403/6001. When ...
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1answer
822 views

Mimo 2G USB Monitor and cheap computer (Raspberry Pi?) [closed]

I have a Mimo 2G USB Monitor (UM-710S I believe) which I got in college due to the lack of space for a real second monitor in the dorm. Now I don't really have a use for it, so I thought of ...
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2answers
70 views

Mount zip file as a read-only filesystem

I am looking for a way to mount a ZIP archive as a filesystem so that I can transparently access files within the archive. I only need read access -- the ZIP will not be modified. RAM consumption is ...
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1answer
46 views

What could be done to make Embedded Linux boot faster?

My team is developing a software for a Embedded Linux solution. The problem we are facing is that it takes too much time for the system to be ready to start running our desired apps (that is, too much ...
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22 views

Linux Booting from NAND instead the uSD

I have some trouble with booting up my zImage. I'm using CORE9G25. So, usually I boot up using the uSD. And after uncompressing the linux and etc it's working. But, after I moved the uSD to the other ...
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1answer
235 views

Trouble with opkg package manager in Angstrom embedded linux on Colibri module ARM v7 processor

I am working on a Colibri module having Angstrom linux installed in it! The processor is ARM v7. I am having trouble updating the softwares installed in the system. Whenever I tried the command opkg ...
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1answer
250 views

Unable to add serialport (nodejs module) when generating filesystem and cross-compiling tools for an ARM processor

I am using buildroot (version 2013.08.1) to generate the filesystem and cross compiling tools to implement embedded linux on a i.MX233 processor (ARM architecture). I add the serialport module by ...
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3answers
2k views

Linux running on SmartTV?

I recently bought a Samsung SmartTV. After setting up the wifi connection, I surfed to http://ip.comlex.de, which gave me the following information about the browser: REMOTE_ADDR: ###.###.###.### ...
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Manipulation of the backlight in a embedded linux device is unstable

I want to control the backlight value of a LCD monitor in a embedded linux device. Doing researches throughout the internet I found a couple of references saying that the file called backlight inside ...
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1answer
229 views

How to debug random reboots, with no kernel panic, of an embedded system?

I have two aValue RPC-10W1 embedded systems that reboots by themselves after 1-2 hours. Facts: The board will reboot within a time span of 1 to 2½ hours. The issue is present on two identical ...
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4answers
2k views

What filesystem offers best protection for securing data against corruption due to power loss?

I am running a small uClibc and busybox based embedded system on an x86 device. I am using an initramfs but I also mounting a custom ext3 directory on a compact flash device in IDE mode that I am ...
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32 views

How can I make a read-only Linux system (which uses unionfs) read/write for the duration of upgrades?

Assuming having an embedded linux application, and for protection against corruption from example abrupt power offs, you implement a read only system with union fs. But then, how is it possible to ...
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118 views

How can I make wlan0 show up automatically when I plug in my WiFi USB adapter?

Before I plug in the USB there is no wlan0: root@beaglebone:/mnt/etc/network# iwconfig lo no wireless extensions. eth0 no wireless extensions. usb0 no wireless extensions. ...
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3answers
551 views

Open Source router firmware options?

What distro's exist that are designed for routers? Please include the following link to the project page link to supported hardware list what distinguishes them, why pick this option friendly web ...
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107 views

uBoot on BananaPi, stuck waiting for waiting for root device /dev/mmcblk0p2

I flashed banian linux 14.09 to an SD card stolen from a raspberrypi. I've plugged a 2.0amp raspberrypi power supply into the correct microusb power port (the one by the SATA connector). Boot stops ...
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Linux and Embedded systems engineering [closed]

First of all I hope everybody had a great weekend. My question is simple. Which version of linux is best suted for embedded software engineering and programming. Thank You AO!
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1answer
699 views

What is the fastest way to install GCC on Wind River 3.02?

I am fairly new to installing things on a bare-bones Linux system and really do not want to just blindly install rpm after rpm of dependencies I think I might need... I know that this version of ...
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22 views

running graphics based script with disabled desktop environments on system startup

I'd like to introduce first what I am trying to achieve. I am having a Linux script which requires graphical environment OR which is graphical(I am myself not sure what I am trying to make others ...
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2answers
2k views

Is using a read only root file system a good idea for embedded setup?

I have been tasked with running Linux as an operating system on an embedded device. The target has an x86 processor and has 8 GB CompactFlash device for storage. I have managed to use buildroot to ...
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42 views

error: getrlimit(RLIMIT_CORE): Operation not permitted. Proftpd on Embbeded Linux enviorment

I've been trying to use proftpd on Arm7 Embedded linux. After starting the execution, it delivers this message: error: getrlimit(RLIMIT_CORE): Operation not permitted The Proftpf version is ...
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38 views

How to make 'install USB' with custom Linux?

I built my own custom kernel for new hardware.(Not a normal PC, embedded x86 device), and using syslinux I could create a booting USB for that kernel. After a few trial and errors, I was able to ...
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I have made custom audio cape using TLV320AIC3107 codec and here is a schematic diagram

I have made custom audio cape using TLV320AIC3107 codec and here is a schematic diagram. For connection with BeagleBone Black I refer audio cape which is available in market. here is a link: ...
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2answers
85 views

Removing duplicated files in the rootfs - to speed up booting time, and improve memory usage

With Buildroot I'm making images for my Embedded Linux Hardware. Mainly I'm trying to speed up the boot sequence (and on the way lower the memory usage), where I've tried many techniques successfully. ...
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1answer
67 views

How to recover firmware on a embedded device with corrupted u-boot and kernel image? [closed]

My embedded device is not working after updating firmware. Thus I tried to update firmware using u-boot. I could successfully get u-boot console via serial connection, but updating firmware failed due ...
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How can you annotate or club info into ELF core files on Linux?

For debugging core files it would be useful to add additional information into a core file at the time it is generated. I'm currently using /proc/sys/kernel/core_pattern to run a 'dumb' script that ...
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39 views

Compiling drivers for armada 370

I am trying to compile usb_serial drivers for a Mirabox with armada 370. I first tried as followes : Install linux source for 3.2 (running kernel is 3.2.36) Install linux headers for 3.2 Edit the ...
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1answer
197 views

Start QT Application on bootup on an Embedded Linux Device (Beaglebone Black)

Below is picture of the display on bootup. Expected display is overwritten by Angstrom screen Expected Display Application is been started as a service. Below is the content of the service file ...
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2answers
4k views

using cross-compiled Valgrind

I have downloaded the sources from the Valgrind trunk and built it for using on an embedded Linux system(Montavista Linux) powered by an ARM926(ARMv5t architecture). Everything went well until I tried ...
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2answers
52 views

Debian system with encrypted data that can be decrypted only from a remote server

This question is about the design of a service I want to setup. Description My purpose is to provide a client box which connects to a server and provides some features. The client box is a small ...
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115 views

How to install a thermal printer on ARM embedded linux using CUPS

I need to install a thermal printer (MY PRINTER) on my ARM linux embedded system. I have a board with an ARM Cortex A5 Atmel SAMA5D34 processor and linux kernel 3.10. With the buildroot I have ...
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4answers
3k views

Safely use SD cards when power can go out at any time

We're working on a small embedded Linux system (2.6.35-ish) with a smallish internal NAND device for the OS and applications (250-500Meg) and an SD card with 8Gb SDHC SD cards for data. The unit's ...
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90 views

Beaglebone: Backup image mounts root as Read-only

After I had completed creating applications for my BB white (running ubuntu), I created a backup of the SD card using-> sudo dd if=/dev/disk2 of=/Volumes/BONE/bone_custom.img Recently, I tried to ...
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1answer
113 views

Login automatically as root

I am working with a board and when it finishes the boot, appears the login. What I want to do is login as root but automatically. I mean I want to do that when boot is finish, I can see the prompt, ...
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73 views

Display boot splash on ramdisk only system

I'm working on a kiosk system with the root file system loaded into RAM. One of the requirements is that the boot process output should be completely hidden from the user. I've already managed to set ...
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51 views

Run startx & automatically embedded syste,

I am working with a board in which I run my application which use th graphical mode. Everything works perfect. I start the graphical mode like this: startx & and then I run my application like ...
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2answers
64 views

Secure the content of a hard disk

I have to prepare a computer to give away, and I do not know who is going to use it. The computer has Debian installed, and the HDD is entirely encrypted. All users have their storage on the server. I ...
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0answers
213 views

How to setup ssh over USB on an embedded linux device?

I have an embedded linux device with an ARM processor. I am connecting to it over a USB port using minicom. What should I do to "ssh" into the device through the USB connection? I want to setup ...
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1answer
60 views

How to download original ramdisk file to the computer? [closed]

Linux embedded, is it possible to download original ramdisk file to the computer, to get source code? Access via SFTP. U-boot 1.2.0 Kernel command line: root=/dev/mtdblock3 ...
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1answer
382 views

How to install Linux on the Lego Mindstorms NXT

Has anybody ever successfully installed Linux on the Lego Mindstorms NXT Intelligent Brick? I've found plenty of things on Google, but none of them worked. I can't find the download for legOS, and the ...
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3answers
138 views

Unable to delete files as a root user using RS232 serial cross cable

I have a device(CCTV decoder) which was rebooting itself, so cant login using LAN cable. It has RS232 port only, no VGA and keybord/USB port(Embeded PC). I connected RS232 cross cable and used ...
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1answer
137 views

Most reliable way to check for connected client?

I have an embedded Linux OS developed from scratch using Yocto. This talks to a Windows XP/7 client. The embedded OS runs a DHCP server and gives an address to the client. The problem is that the ...
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1answer
111 views

Canot remove symlinks: after reboot, symlinks re-appear

Using ssh from BusyBox, I cannot remove symlinks: after rebooting the device, symlinks re-appear. ls -la shows that symlinks have been removed, but after rebooting device they re-appear again. Those ...