embedded-linux

Which graphics library is better for embedded linux ?

Hello All, Which graphics library is best for developing GUI for character LCD or simple graphics LCD for embedded linux. ? which has better performance and support ? Thanks, Neel ...

Nano-X (Microwindow) Programming guide ?

Hello All, I want to know some basic programming guide for Nano-X (Microwindow, Embedded GUI). I know it's windows based programming but i want some of the tutorials where i can learn it something better. I also want to display icon or images on LCD, so how it is possible in Nano-X or Microwindow ? I also want User API manual for Micro...

How to prepare modules.dep and ld.so.cache while cross-compiling?

I'm cross-compiling kernel modules and some libraries on x86 for ppc. Is it possible to create ld.so.cache and modules.dep on my host system? P.S I'm using ELDK tools. ...

How do I enable core dumps for daemon processes on montavista linux?

I am not sure if stackoverflow is the correct place for this, but since this is for embedded development, and I need core dumps, which are also for development, I figured that this was the best place to ask. I am trying to enable global core dumps in such a way that every time a program crashes in a way which produces a core, it gets wr...

polling file descriptor

Hello, for the embedded MIPS-based platform I'm implementing a small program to poll GPIO, i.e. I'm using chip vendor's user level GPIO library with basic functionality (open /dev/gpio, read, write pin etc.). The design is straightforward: int gpio_fd; fd_set rfds; gpio_fd = gpio_open(...); while (1) { FD_ZERO(&rfds); FD_SET(...

providing GUI layer to embedded board

Hi Everybody I have ported uCLinux on an embedded board and want to provide it a GUI layer. Actually my board is consist of an ARM processor and other peripherals and a touch screen display. Actually this is a small embedded board which I have made . I want to display various gui widgets like buttons , scrollbars etc . I want to us...

Are ioctl driver functions executed from an atomic context under linux 2.6?

I am tracking down a "scheduling while atomic" error in one of our drivers, and am wondering if ioctl's are an atomic context. Also if any one has anything to share on how to get into and out of atomic contexts, and common places they occur, it would be helpful. ...

Optimize the Binary size of QT ?

Hi All, Currently we are working on how to optimize the application's binary size of QT. I need only one QLable and QLineEdit widget in application and i have removed other widgets from the compilation options. Currenlty application link libQtGui and libQtCore library. I have compiled QT for embedded arm architecture. I have compile one...

Keypad Driver Change in QT Event Handling ?

Hello All, I want to handle the event that like in mobile kaypad. I mean i want to handle multiple code for one key press event just like mobile keypad if we press e.g 2 key two times then it detect 'a' just like that. Is it possible from the driver ? If i want to handle in driver level then how to handle it ? i mean QT internally do th...

linux kernel ota framework?

Hi there, Before designing my own Linux OTA stack, I'd better probe if anybody knows of an existing Linux OTA stack/framework that I could make use of/contribute to. What I mean by Linux OTA stack/framework is a service capable of updating the Linux kernel on my device from a remote repository. Basically something like the OTA update f...

Using mono in embedded linux for hardware

Hi, I am doing research for a company as an internship. I had some question in using Mono, the cross platform implementation of .Net platform. My company designs hardware and sotware. My knowledge of using embedded linux is very low. My company where I am doing my internship is really .NET minded. But the new developments of mono, they...

DreamBox (enigma2-based) to play multicast streams

I have a couple of DM800HDs running Open Dreambox and I want to stream all the media to them through a UDP multicast from VLC (something like this). Those boxes would be un-manned, so I want them to boot into RTP mode and stay that way, just play what is being broadcast by VLC server. Open Dreambox runs an enigma2 player. I am not sure ...

Porting Linux kernel 2.6 to new MIPS board

I wanna port Linux kernel 2.6.x to new MIPS board. Unfortunatelly, I can't find good actual documentation with step by step explaination. Hope, you'll help me. Paper books are OK too. Thank you in advance! ...

error for gdbserver

Anybody knows the error message? gdbserver[949] segfault at 81c ip 0000081c sp bfeef918 error 4 in gdbserver [8048000+1c0000] segmentation fault Thanks, ...

How would one store German text in an embedded system?

I've created a memory mapped 1 bit interface to an LCD in an embedded system, along with 4 or 5 bit mapped fonts for the 90+ printable ASCII characters. Writing to the screen is as simple as using an echo like statement (it's embedded Linux). Other than something strictly proprietory, what recommendations can people make for storing Ge...

Determining CPU utilization

Is there a command or any other way to get the current or average CPU utilization (for a multi-processor environment) in Linux? I am using embedded Linux in a small system. Basically, I need to determine the CPU utilization, so that if it is high, I can instead divert a new process to another controller in the system, rather than execut...

ALSA: Looping Sound Problem

I have written a small program that tests the ALSA library on an Embedded Linux board. The program configures ALSA, plays a single sound and then waits 1 minute before exiting. Here is what I am observing: after playing the sound, there is silent pause and then the sound is played again. I am 100% positive that the program itself is not...

how to suspend data for multi function sd card

I have a multi function SD device which is controlled by two different driver. One driver need to suspend the other driver data transfer while sending data to underline bus driver. The suspended transfer will resume once the high priority transfer is done. SD specification supports it. Can anybody please let me know how to do that in Lin...

Embedded Linux Read and Write Video from a USB port

I've got an embedded Linux project where I need to read video in through a USB port, make some modifications to that video (such as compression), and then send it back to the host via preferably the same USB port. It would also be a preferred feature if we could send commands to change things such as the video compression level from the ...

usbserial.ko for linux kernel 2.6.29.6

I need usbserial.ko for my linux 2.6.29.6. Anyone knows where to download it and how to integrate it into my current kernel? Thanks. ...