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

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Webserver for Embedded Linux [closed]

I am building an ARM based embedded device running embedded linux having a web based interface and I need a webserver running on my device. At maximum it will get 50 requests at a time. I have on ...
3
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1answer
613 views

How to test the touch screen on embedded devices like iPhone / iPad / Kindle? [closed]

I want to test the touch panels on embedded devices like iPhone, iPad and Kindle against following criteria: Do a gesture, like tap, swipe, pinch ( zoom in/out) 10000 times and validate that every ...
2
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1answer
813 views

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

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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1answer
56 views

Do IPTABLE rules apply to other devices on a network?

I have an embedded device that listens to a specific port to be programmed by vendor specific software. If I have a network that consists of a small linux computer and this industrial device would ...
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2answers
273 views

Linux security vulnerabilities?

A while back I started an embedded project using the 3.2.10 kernel. Now the project should go into production and the stable kernel is 3.2.16. I would prefer not to upgrade anything to avoid ...
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1answer
88 views

Location on disk to write a byte-flag?

I am writing an update utility for an embedded Linux device for which I am responsible. I'm creating a basic side-by-side setup, where updates are applied to a staging partition and then the ...
3
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2answers
298 views

Ethernet Sniffing Embeded Device

I recently dug out some prototyping equipment from the trash and I want out figure out what the heck it is. It has a port labelled 'Ethernet' and when I plug it into a router the lights flash like its ...
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1answer
472 views

init.exe: Caught segmentation fault, core dumped - what is the source of this error

On my embedded device, I have this error showing up after kernel boot: init.exe: Caught segmentation fault, core dumped But I cannot understand why is this happening? If I do battery cut( i.e. ...
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2answers
488 views

NAND flash memory wear & virtual memory page swap

For a linux kernel with virtual memory and disk storage, pages are swapped back and forth into swap area. But embedded systems generally use NAND flash instead of disk. A NAND flash has a limited ...
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5answers
5k views

Low Cost, 2 Ethernet Ports & Runs Linux [closed]

Looking for an inexpensive embedded device that contains 2 Ethernet Ports, runs Linux (or some other type of Unix), and is under $50. My main concern is cost. It must be under $50 and have 2 Ethernet ...
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1answer
236 views

Recommendation on filesystem for embedded device - RAM or USB

It's been 4 years since I stopped working on my Linux internet radio box. My Linux box was Ubuntu 6.04 with Ext3 fs. At user-space, everything works perfectly except I occasionally bumped into ...
3
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1answer
665 views

How can the job of SDFlasher.exe given with FriendlyARM utility be accomplished on Linux?

I am playing with FriendlyARM Tiny 6410. The instructions on setting up an SD card for booting self compiled versions of linux kernel involve the use of SDFlasher.exe. People have tried to find an ...
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1answer
285 views

How can one force a re-scan of an SDIO bus from Linux user space?

On an embedded Linux platform, I have a network adapter attached to an SDIO interface. There is no Card Detect signal on this particular bus. If for instance, I turn the network adapter power on or ...
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1answer
3k views

Running Debian i386 binary on Debian armel via qemu

I am trying to follow this guide to set up a Ventrilo server on my SheevaPlug, running Debian armel. This page states that I can use QEMU to run the binary that was made for i386 on my arm system. ...
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2answers
277 views

Sony runs which operating system? Oracle Linux or Crestron Extron or Minix or OS X?

Sony has TV, PlayStation, Camera random hardware's. Where many of those have GUI available too. I want to run my BASH script there with ncurses. But how do they drive there devices? Which operating ...
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1answer
3k views

How can I observe memory bandwidth?

I have an embedded Linux ARM system that is showing significantly less throughput than expected on both Ethernet and USB. I suspect the memory may be contributing. Is there a way to observe the memory ...
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0answers
253 views

Facing issue with cron on embedded linux

I have a SAM9 based board running embedded linux using buildroot package. I added the crond and crontab support to busybox from make menuconfig and built the rootfs and flashed it to my board. The ...
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2answers
2k views

how to re-enable input on a serial console

I have an old router which runs Linux and I'd like to have a serial console on. This used to work fine, but after a firmware update, I can now only get output on the console and cannot give any input ...
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2answers
4k views

How do I have Linux boot with a rootfs in RAM?

The rootfs is a squashfs image and my bootloader is loading it into some address in SDRAM. What parameters do I need to pass to the kernel so It can mount the rootfs from there? Squashfs support is ...
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1answer
4k views

D-Link DI-624 H/W ver. D: Flashing OpenWrt

I have a D-Link DI-624 rev. D2 Router. It is based around an Atheros AR2316A-001 chipset, and has 8MB RAM. I opened the device to check for actual parts use in it, and I can confirm, it is indeed the ...
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1answer
966 views

Problems with a Read-Only Root Filesystem

I was creating a read-only root filesystem for use in an embedded system. I successfully got the system to boot after setting it to read-only initially, but then I needed write access to another file ...
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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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1answer
367 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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0answers
606 views

Why is this ALSA configuration file preventing aplay and arecord from listing PCM devices?

In my embedded system I have this configuration file in /etc/asound.conf: pcm_slave.sl2 { pcm "hw:0,0" rate 48000 channels 2 format S16_LE } pcm.rate_convert { ...
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1answer
627 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 ...
5
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1answer
370 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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4answers
19k views

How to check password with Linux?

I want to check, from the linux command line, if a given cleartext password is the same of a crypted password on a /etc/shadow (I need this to authenticate web users. I'm running an embedded linux.) ...
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3answers
3k views

Increasing kernel memory size

I have an embedded board with 512MB of RAM running Linux 2.6.29 and UBoot bootloader. But the kernel is able to utilize only 128MB of RAM. I tried changing the value of XCODE_MEMSIZE, which I think ...
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1answer
2k views

What is a “watchdog reset”?

After reading this question, I was a little confused; it sounds like some daemon reacting by rebooting a system. Is that right? Is it a common occurrence in embedded *nixes?
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2answers
2k views

How do I cause a watchdog reset of my embedded Linux device

Is there a command like vi > out vi | out That I could use to cause a watchdog reset of my embedded linux device?
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1answer
515 views

Low-level serial configuration?

I'm using embedded Linux platform, kernel is 2.6. I'm using stty command to configure ttyS* high level. The problem is that when I want to turn hardware flow control on: stty -F /dev/ttySA0 crtscts ...
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2answers
11k views

Why does sh say “not found” when it's definitely there? [duplicate]

Possible Duplicate: “No such file or directory” lies on Optware installed binaries I'm trying to add ebtables to a little router box. I went and got a binary compiled for the ...
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1answer
133 views

Set runlevel at boot via hardware (analog) input, switch, etc.?

I've got pretty solid Linux experience, but little in the embedded/small system area, and this one has me baffled. I've agreed to help a friend work on a project using a tiny little x86-compatible ...
2
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1answer
662 views

Good OpenWRT alternative? [duplicate]

Possible Duplicate: Open Source router firmware options? I own an ASUS wl-520gU (4 LAN, 1 WAN, WiFi, 1 USB, 4mb flash rom, 16mb ram. Broadcom BCM5354 @ 240). I am going to use it as a ...
5
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3answers
6k views

Kernel panic - not syncing: No init found. While booting from U-Boot

Kernel mounted the root file system but can not find any init script. I'm sure that script exists in my ramdisk.img! I also checked out this and GE863-PRO3 U-BOOT Software User Guide 1VV0300777 Rev. ...
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2answers
239 views

How to start customizing linux?

I've heard that Android is based on linux (or unix?). That means, engineers at google modified linux code to run on android phones or tablets. I would like to become those engineers someday. Where ...
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1answer
99 views

Kernel - Starting the application

I placed the uBoot loader and the kernel into the raw flash image. This does not contain any root file system. (I copied uBoot and kernel image using dd command to a flash image). Now i have to ...
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3answers
3k views

Reading EDID from EEPROM

From the link: http://en.wikipedia.org/wiki/Extended_display_identification_data The EDID is often stored in the monitor in a memory device called a serial PROM (programmable read-only memory) or ...
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2answers
366 views

Swap root at runtime

I am developing an embedded Linux system. The system is usually installed by creating a ISO file which is written to a USB stick the board can boot from. To make the installation possible to do ...
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3answers
522 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 ...
3
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2answers
605 views

Inittab seems to ignore remount,rw /

I have an embedded system that boots off compact flash and runs with the initrd.img ramdisk mounted as root. When booting, it mounts the initrd image ok in read only mode but then when inittab runs, ...
5
votes
1answer
351 views

What distribution-maintained cross-compile toolchain packages exist?

I have just learned of Gentoo's sys-devel/crossdev package. This is a package that is useful for creating a cross-compiling toolchain. Are there any other such packages out there on other ...
0
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1answer
212 views

What is the scope of using rsync in sync-ing my target root file system from my host?

I have a target and host setup with Linux as the OS on both. I have a root file system(RFS) in my target. I have a setup in which my RFS is in development state so it will undergo changes on the ...
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4answers
4k views

Shell command to read device registers?

On a single-board computer running Linux, is there a way to read the contents of the device configuration registers that control hardware? I think it would be a wrapper for inw(), more or less. I'm ...
3
votes
3answers
714 views

Debugging ethernet before NFS boot

I'm trying to boot Linux from U-boot on an embedded ARM board using a filesystem on a remote machine served via NFS. It appears that the ethernet connection is not coming up correctly, which results ...
4
votes
1answer
881 views

Tunnel through a NAT

I have a router that provides internet connection to a single client device via a wireless cellular data network. This network provides non-public IP addresses which gets natted. I would like to get a ...
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5answers
710 views

Which minimal but extendable Linux distribution to choose

I need an extendable Linux distribution which I can easily reduce in size so much that it fits into a 64 mb CF card. In this stripped version it will run on a Via C7 and needed is Kernel, ...
4
votes
1answer
519 views

Capturing OS/hardware communication / reverse engineering drivers

This may be too broad of a question, but I'm not really sure what exactly I'm looking for. My main question is how the open source community reverse engineers windows drivers (for say, video cards) to ...
4
votes
4answers
2k views

How do I install GCC on a system with no compiler?

I've been messing around with my NAS which runs on Linux. I have root access, but there is no compiler. I seem to remember something about being able to compile on another system, but I'm not certain. ...
3
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2answers
306 views

Databases for embedded Linux?

I need to choose a database for an application on an embedded linux platform. Any suggestions on which databases are typically used with embedded linux? Please let me know. Regards Radha.