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

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How to check flash memory for ECC errors from the Linux command line

Is there a way to check flash memory for ECC errors from the Linux command line? Note that I do not want to correct ECC errors. I just want to detect errors and list page addresses where they occur.
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13 views

How does rootfs.ext3 image file work?

I have a FriendlyARM mini6410 device and I have just hardly make it boot from sdcard. Now my sdcard uses "u-boot for mini" (u-boot.bin), "linux2.6.38 kernel" (zImage) and "rootfs qtopia fs" ...
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15 views

How to statically assign network interfaces to USB Wireless LAN adapters

For this system there are two WLAN USB adapters: One connects as a client always, and the other connects as an AP. I have a script that manages their operation, but in order to do that I need to ...
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3answers
61 views

Legal status of an embedded Linux case

I wanted to find the source code of embedded Linux that is used in Shenzhen Apexis Electronic Co.,Ltd products. For example in this page: http://apexis.com.cn/productsdetails_244.html You see they ...
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1answer
23 views

4G modem on an embedded 2.6.32.9 kernel on a Parrot AR Drone 2.0

I am attempting to compile support for a Huawei E3276 usb LTE modem for an embedded Linux/BusyBox installation on a Parrot AR Drone 2.0, which is based on kernel 2.6.32; however, I am running into ...
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1answer
27 views

Enable user login, there by login can happen either as root or user based on requirement

I am working with a board and when it finishes the boot, it gives us login as root user. What I want to do is to login as user or root based my requirement. Mean when the board boots up i should get a ...
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1answer
27 views

Clocks entry in SPI device tree entry

I'm using a DTS file for a Duovero Parlor board. To this board I've added some SPI devices. My first (a display) works perfectly so I have that entry correct at least. I want to add an entry to ...
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3answers
142 views

sshd not starting after boot on embedded linux built with buildroot?

I've done a minimal install using buildroot's default config for the Raspberry Pi. I also selected openssh and openssl from menuconfig: Package Selection for the target ---> [*] Networking ...
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68 views

How to run Ubilinux / u-boot under qemu (x86)

I wish to test Ubilinux (http://www.emutexlabs.com/ubilinux) before flashing it onto my Intel Edison board, which currently has Yocto on it. I am able to emulate Yocto for Edison with qemu, running ...
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135 views

How to create boot SD card for Banana Pi manually

It seems that I have a lack of understanding how booting SD-Card images on devices like the Banana Pi work. The situation is as follows. I have a Banana Pi and a Banana Pro. Every device has an ...
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30 views

setting up pycurl for embedded ARM

I am working on a linux x86_64 machine, and I am trying to set up pycurl for an embedded ARM processor running petalinux. I need pycurl library before building the embedded linux image. I have ...
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ARM Debian: how to transfer system from MicroSD to internal flash?

I'm a Windows user, and a true newbie in the linux world, so I hope my question is'nt too dumb. I have Debian running on a BeagleBoneBlack, booting from the MicroSD. After a lot of apt-gets, installs ...
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1answer
34 views

udevadm does not show expected information

I'm building my own Embedded Linux distro using bitbake . I added udev in the list of dependencies (RDEPENDS). I noticed that the output of: udevadm info --query=property --path=/sys/block/sda is ...
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34 views

Device tree compiler won't update

I have a problem on Ubuntu 12.04. I am trying to flash a Toradex Colibri T20 with Linux, following these instructions: http://falstaff.agner.ch/2014/03/16/colibri-t20-upstream-linux-kernel/. However, ...
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38 views

WIFI over SDIO over USB - Do I have to reflect that in the device tree?

I am currently extending an embedded hardware platform which runs a linux kernel 3.16. I want to connect an external SDIO controller to the USB bus, and then run a WIFI module using that SDIO ...
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73 views

How to switch wifi channel without dropping connection?

We are developing small internet connected device that connects via wifi and does some work. It is controlled via mobile app. For configuration purposes we use wi-fi module that can work in both STA ...
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69 views

Transfer file to pc from embedded linux device via serial communications

I'm working on an AT91SAM9G20. I'm connected to AT91SAM9G20 via the debug port using rs232 serial communications. It has Linux version 3.4.8 but does not appear to have any of the common file ...
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1answer
25 views

SSH demon not installed in linux embedded device

I have an embedded device which runs linux(arm). I am trying to update the executable through ethernet using scp command. But I got to know that sshd is not running in the device . I need to install ...
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40 views

Specify Virtual Size using DRM with Frambuffer Emulation

I am attempting make use of double buffering on an AM335x processor. We have an example running on a demo image that was not created by us. I am working on putting together our own image using ...
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22 views

How can a package's license be determined using OPKG package manager?

OPKG is used as the package manager in an embedded Linux system. I would like to be able to determine the license of a package prior to installing the package. Is there a simple way to achieve this ...
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81 views

Tegra Mesa GLES without X

I am trying to setup a Tegra 3 (Toradex Apalis T30) based system that will have an OpenGL ES based user interface on a touch screen. Unfortunately the standard Linux4Tegra kernel is seriously outdated ...
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83 views

Yocto menuconfig not working

For some reason the menuconfig menu does not come up when I try launching it from my Yocto installation. I am using the Toradex Yocto 1.6 system as is described here ...
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1answer
188 views

/dev/input/event0 is missing in embedded linux

I'm working on a project and we are trying to make a touch-screen work using Qt with Tslib. We already made some previous prototypes and we managed to make them fully functional. But when creating a ...
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143 views

Cross compile GLIBC : error: Need linker with .init_array/.fini_array support

Whenever I call glibc configure with --prefix=/usr --with-headers=/var/tmp/ubuild.wandboard-armhf.build_dir/armv7a-hardfloat-linux-gnueabi/sysroot/usr/include --host=armv7a-hardfloat-linux-gnueabi ...
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1answer
93 views

make: xscale_be-gcc: Command not found

I'm new to embedded and am reading 'Embedded Linux Primer' at the moment. I tried to build an xscale arm kernel: make ARCH=arm CROSS_COMPILE=xscale_be- ixp4xx_defconfig # # configuration written to ...
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1answer
202 views

What is the complementary command to 'rx' for xmodem transfer?

I have an installation of busybox on an embedded linux system that comes with a great little utility called rx: rx FILE Receive a file using the xmodem protocol This is perfect for transferring ...
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22 views

How well is Debian supported on MIPS these days?

I am doing a new embedded Linux design, and am thinking of using a MIPS CPU. All my previous designs have used ARM. On the most recent ARM design we installed Debian ARM-HF which was excellent. My ...
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1answer
52 views

Selecting IO scheduler on external drives

I'm running linux on the beaglebone black. My system is running directly from the sdcard. To change the IO scheduler I need to configure /sys/block/xxx/queue/scheduler where xxx is the mounted ...
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177 views

DirectFB does not write to /dev/fb0, embedded device

I am developing a Linux based port for a custom board based off the Atmel at91sam9261-ek demo board. Processor core is arm926ej-s LCD (board customization) is VGA, 640x480, 24 bit packed true color. ...
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1answer
1k views

How to open the SSH port 22? [closed]

I have installed the ssh utility on an embedded system but I can't connect to it. I am able to ssh from the device to another computer on the network but not the other way around. The only port ...
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1answer
83 views

Monitoring network connectivity in Busybox/embedded Linux

I have an embedded Linux/Busybox system that needs to monitor its own network connectivity. I'm trying to figure out if the device is "all alone" on the network for more than say 10 minutes, and take ...
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66 views

Android chroot Debian

I have a armv7l embedded device with 3 usb ports and a sd card slot. The OS of the device is android with a Debian OS in chroot. Via the Debian I can ssh into the device and breakout the chroot to ...
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1answer
149 views

Jetson TK1 boot issues

Received my Jetson TK1 yesterday. After unboxing it and configuring the Linux GUI, rebooting the device with a mouse (cordless) attached to its USB 3.0 port takes it to some sort of Command line page ...
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1answer
74 views

What's overwriting my apt sources files?

I'm working on a Phidgets SBC2. It's got emdebian grip, but grip has is over and so I get 404 on those repositories when apt-get is trying to get package lists. I can get things to install using ...
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1answer
41 views

ITEAD Core A20 cant load or Proceed to the FileSytem

i have an ITEAD CORE AW2041, which i wanted to deploy some image on it, i got the image on an sd card but when i deploy it on the device, the booting process gets stuck at the kernel level, any heads ...
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1answer
212 views

ERROR: image is not a fdt - must RESET the board to recover

I am attempting to boot the freescale 1040RDB and am having some difficulty. I'm using a pre-built SDK from Freescale that has a linux VB image with the yocto installation along with all of the yocto ...
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1answer
180 views

How to setup touch screen for X11

I am running SuSE-based embedded system with a touchscreen. The embedded application is a graphics application which uses OpenGL over X Window for graphics. We have a user-space touchscreen driver ...
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37 views

Little slow downs in Embedded Linux application

My team is working in an embedded Linux solution for a product where a center application receives and process data from the hardware and sends it to a database and to the interface application. In so ...
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1answer
52 views

Run only the Linux kernel and user programs

is it possible to run only a Linux kernel on a system which will load my programs instead of an operating system? I want to work with a Raspberry Pi with a Linux kernel. I am trying to create a ...
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1answer
1k 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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2answers
745 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
110 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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39 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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64 views

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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0answers
41 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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650 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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348 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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1answer
1k 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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49 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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66 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 ...