1
vote
1answer
37 views

Uninstall Linux on an embedded board

I am using an embedded board, a FOX G20 V with an ATMEL AT91SAM9G20 processor. I would like to know first of all, which specific linux version I am using on this board, but also, how to remove it. ...
0
votes
1answer
73 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 ...
1
vote
0answers
14 views

tty not resizing properly

I'm running an embedded poky linux (linux-yocto v3.13) on a beagleboard. However, I'm having trouble when logging in over a serial using PuTTY: the terminal does not resize at all. Usually, the ...
1
vote
0answers
21 views

Interfacing ds1337 RTC on LPC17xx

I am a newbie and I am trying to understand how to interface DS1337(RTC) on LPC17xx Board. This board uses uclinux 2.6.33. .CONFIG: CONFIG_RTC_LIB=y CONFIG_RTC_CLASS=y CONFIG_RTC_HCTOSYS=y ...
3
votes
2answers
125 views

File system that never breaks (data loss acceptable)

There're several existing topics revolving around this issue, but what I seek is slightly different. I have an sd card on an embedded Linux and it suffers from power loss. I might be able to modify ...
1
vote
0answers
50 views

Why is my embedded Linux unable to detect the sd device?

I have this ARM9 SAM9G25 embedded System, running a Linux 2.6.39 Kernel and a Busybox. I put the Images (of the bootloaders, and the linux+initramfs) on a SD so that in the end the system is booting ...
3
votes
1answer
25 views

How to determine how many bytes / hr are being written to my SD card

I have a Debian embedded Linux system that uses an SD card as the RFS. What is a reliable way to determine how many bytes / hr are being written to the SD card?
3
votes
1answer
70 views

How to set the CPU freq. in Linux?

I'm using this ARM9 SAM9G25 embedded system, that when switched on, is only online for a few seconds and because I want to speed up the whole process, I'd like to check the CPU frequency, and set it ...
0
votes
1answer
50 views

supported 2014 distro with 2.6.x kernel

I'm cutting my teeth at putting together a Linux install for a PC104 board that supports <= kernel 2.6.x with a Disk-On-Chip. I've read up on Embedded.org and Yocto, but before I try compiling ...
1
vote
1answer
47 views

High RX packet error count with modem - how to analyze?

I'm testing a CDMA modem on my Debian embedded Linux system. I'm doing some wgets of large files and am seeing the connection drop now and then. Looking at the ifconfig output for the PPP interface ...
0
votes
1answer
139 views

Basic script in Angstrom Linux running on a Beaglebone Black

On my embedded system, I can toggle a user led with: echo > 1 sys/class/leds/beaglebone:green:usr2/value. Similarly, I can find the value of a GPIO (gpio60) (set to input), with more ...
2
votes
1answer
91 views

How to build a basic embedded linux on a Qualcomm router?

Not knowing the first thing on how to build a minimal linux system on an embedded device, I'd like to get some pointers in the right direction. Generally speaking, I'd like to know what are the ...
1
vote
1answer
83 views

How to make a USB storage device undetectable in u-boot?

I need to do a test in an embedded system where I plug in the USB storage device and do "usb start" but the USB storage device is not detected. I have a working pendrive. How to make it undetectable ...
4
votes
1answer
148 views

How do I load initrd into memory to be passed to kernel when using kexec?

As the MIPS port of kexec doesn't support the --initrd param, I'm looking for workarounds to imitate the feature. According to Linux/MIPS wiki, MIPS kernels support rd_start and rd_size kernel command ...
0
votes
1answer
136 views

how do I include the qcserial module in the kernel?

I need a kernel compiled, featuring the qcserial module to have support for the Huawei EM 680 model (Gobi 3000). I got kernel 3.11.6 and can find the appropriate source file in ...
3
votes
0answers
78 views

What is the difference between the output of TOP command and Oprofile?

In the top command one of the processes is always showing a CPU usage of 4 to 5%. But in oprofile the CPU usage is 0.004%. I do not understand this. And I also noticed that even when a process is in ...
3
votes
0answers
23 views

Queuing disciplines are per-interface, what happen with interfaces using same device?

I have read about queuing disciplines here http://lartc.org/. I understand that for instance band 0 of pfifo policy is prioritized over band 2 within same qdisc, but what happen when i have ppp0 and ...
1
vote
1answer
380 views

/dev/console dynamic redirection

Is it possible to dynamically redirect all data sent to /dev/console into something else (for example - to /dev/null, /dev/tty9 or even /dev/null)? Of course, it can be done statically via ...
0
votes
2answers
65 views

embedded linux and powering usb stick

I have a problem where I need to read a usb-stick or a usb keyboard: When I plug in the USB stick or keyboard I can't get power to the device. dmesg says nothing I tried: for device in $(ls ...
5
votes
2answers
485 views

Is it possible for a daemon (i.e. background) process to look for key-presses from a USB keyboard?

I'm working on an embedded Linux project where I will be developing a program that will run automatically on bootup and interact with the user via a character display and some sort of button array. ...
1
vote
1answer
307 views

What is the easiest way to draw graphics on Linux framebuffer?

I have some embedded Linux ARM chip with LCD display on frame-buffer. I connect to chip with serial console. I can access frame-buffer directly with low-level commands. However I need to draw some ...
1
vote
1answer
243 views

mmcqd hangs and burns the CPU on the embedded device

On my embedded system I'm writing an intensive video stream to SD. I don't mount partitions, just write to /dev/mmcblk0p1. After a while my writing process hangs. I get [16952.240000] INFO: task ...
1
vote
1answer
241 views

How to configure linux to output to monitor

I'm currently running a lightweight Debian distro on a development board from Compulab. I have to login to the system via serial port everytime. The system has graphical card and the driver is ...
1
vote
1answer
157 views

can linux be configured to blink an LED (GPIO) on disk activity?

I'm hoping to blink an LED that is wired up to a GPIO line whenever the USB connected disk has activity is there an easy way to pull this off?
1
vote
0answers
82 views

Data loss prevention ( or recovery) in a MySql db in embedded systems

I have a little ( big ) problem with a MySql application that write on a SD card or a Compact Flash. After a data loss ( a power failure , for example) , if I try to retrieve the data of my db , it ...
1
vote
0answers
85 views

Are there any good Embedded Linux image builder? [closed]

I'm looking for an image builder to create several Embedded Linux images for different ARM boards. I know the following image builder: linaro, buildroot, openEmbedded, yocto If I've missed one, ...
1
vote
2answers
928 views

Why is my wlan0 interface on Angstrom (Beagleboard) “Not Associated”?

I'm installing a Angstrom (custom build, not the default build) on a Beagleboard XM. I can scan for wireless networks using iwlist and see the neighborhood wireless devices. I have set my SSID and ...
1
vote
1answer
136 views

compressed and uncompressed kernel on an embedded device

I have been using several different embedded boards that store kernel, init files, filesystem, etc. on partitions of a (micro)SD card. I notice in the example usage or instructions that compressed ...
1
vote
2answers
343 views

Is it a bad idea to not have a swap partition on an embedded linux setup?

I have a small embedded linux kernel and file system created via buildroot that is installed onto a compact flash drive running on an x86 board. I am using an initramfs (due to power loss concerns) ...
2
votes
3answers
240 views

Is there a variation of Linux or Unix that does not require open licensing?

In the future I may be building a system with an embedded operating system. Given the commercial properties of this system, it will make sense to have all of the internals as closed source as ...
2
votes
1answer
273 views

Chain loading kernel without a boot loader

I am working on an embedded project that will do in-place upgrades. There may come a time when an upgrade will need to reinstall everything. Since this is a pretty risky thing, I would like to have ...
3
votes
0answers
131 views

Implement Java/JavaFX on ARM

I am working on ARM Linux. I have found this link that says that JavaFX could work on ARM. I am confused about Embedded Java SE and JavaFx ARM. Do I need to setup a JVM for those or not? I have ...
3
votes
1answer
469 views

Checking linux Kernel for RT-Preempt Patch

How to know whether a particular patch is applied to the kernel? Especially RT-Preempt Patch.
2
votes
1answer
247 views

What is the connection between jiffies and IPS? How to convert jiffies to IPS?

Reading from /proc/PID/stat a lot of information can be processed. I would like to see how many percentages has been used of CPU power by this process. There are a lot of variable around here (utime, ...
1
vote
1answer
590 views

How do I safely unmount a network share on Linux STB without crashing (I get GSOD)?

I have a network share named dreambox on C:\dreambox that is shared with the group Everyone in Windows. I have mounted it to /hdd on a Linux-based STB with OpenDreambox (OpenEmbedded) using Telnet ...
0
votes
0answers
168 views

A Reboot() command with failover

I'm implementing a Reboot() call in my application. It's an embedded application, so no console, keyboard or power switch. The Reboot() must eventually restart the system no matter what. Ideally, I ...
5
votes
1answer
754 views

Defragging RAM / OOM failure

This question is fairly lengthy, so I'll ask the questions at the top and then go through my method of coming to the questions: Did (Busybox based) rm not execute because there wasn't enough ...
-1
votes
1answer
284 views

Installing a .ko module on an embedded Linux system that does not support modules

From the answers to this question I have discovered that the embedded Linux distribution provided to me, by my hardware supplier, was not built with kernel support. If I am to use this distribution I ...
4
votes
1answer
402 views

Embedded board with apache

I'm working on a Davinci DSP ARM embedded board. The board itself is the Texas Instruments 816X/389X EVM. I'm currently trying to get apache working on the board. The problem is that the SDK for the ...
2
votes
2answers
423 views

Is it safe to just copy shared libraries onto embedded Linux device?

The following is contained in the vendor user manual for its embedded Linux distro on the hardward board they supply Developers can put their program onto X-Linux device via FTP or NFS. Before ...
3
votes
1answer
484 views

Set GPIO permissions cleanly

Can the default permissions and ownership of /sys/class/gpio/ files be set, e.g. by configuring udev? The point would be to have a real gid for processes that can access GPIO pins on a board. Most ...
1
vote
2answers
232 views

System Management Mode in embedded systems

I wish to install Xenomai which works on Linux providing a kind of hard real time environment. x86/64 architectures are supposed to contain the "System Management Mode" which prevents them from being ...
3
votes
1answer
2k views

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
votes
1answer
475 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 ...
0
votes
1answer
54 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 ...
3
votes
2answers
229 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 ...
0
votes
1answer
396 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. ...
1
vote
2answers
402 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 ...
1
vote
1answer
226 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
votes
1answer
551 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 ...