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Questions tagged [embedded]

For questions about software and firmware embedded on hardware.

226 questions
90
votes
2 answers

How do web-servers "listen" to IP addresses, interrupt or polling?

I'm trying to understand the lower details of web servers. I am wondering if a server, say Apache, is continuously polling for new requests or If it works by some sort of interrupt system. If it is an interrupt, what is sparking the interrupt, is it…
user2202911
  • 905
34
votes
3 answers

How is the memory inside card chips read without a power source?

When we use our debit cards or any card with a chip inside of it that gets immediately read when scanned, how is the memory inside the chip retrieved since the card isn't exactly "turned on" much like a standard computer?
J.Doe
  • 371
23
votes
3 answers

What is the Linux command that encapsulates almost all of the other commands?

I remember that for Linux running in embedded systems, due to size limitations, it can't pack as many commands as in ordinary workstations. So there is a do-it-all command that can mimic almost all the commands (including ls, cd, time, etc.), but I…
wangshuaijie
  • 577
22
votes
6 answers

Can we run Linux in something faster than RAM?

This is perhaps a silly question, and may be the result of a misunderstanding. I'm studying CPU's right now, and memory in particular. I was just reading about how much faster SRAM is than DRAM but more expensive. SRAM is very expensive: I shopped…
Ziggy
  • 906
14
votes
1 answer

Has anyone evaluated NuttX RTOS?

While reading Linux User's Journal today, I stumbled across a little blurb about NuttX RTOS. I checked out their website and was fairly impressed with its feature set and its ability to put it in an 8052! I find it interesting that it supports POSIX…
Jay Atkinson
  • 535
14
votes
2 answers

How do I know if the fonts in a PDF file are embedded or not?

How can I understand that the fonts in a PDF file are embedded or not?
Mehper C. Palavuzlar
  • 55,953
11
votes
1 answer

Linux acting as USB device

I am working on an embedded Linux platform and I have need to transfer data between the platform and a PC. The embedded Linux has a USB device port (like a printer), so this is the means by which transfers would take place. I envision the easiest…
Aaron
9
votes
7 answers

Is there a Linux distro that will easily run "embedded style" on a Raspberry Pi?

I need a Linux distro that will give me the following: Run on a Raspberry Pi Can reliably survive power loss (like via a read-only filesystem) I've been able to hunt down some documentation on how to change a regular Linux distro over to read-only…
Dan Harper
  • 191
9
votes
1 answer

Thunderbird not showing embedded images?

I receive a weekly report in Thunderbird (7.0) from the CMS i use for my website. It shows everything in the correct layout but no images. It shows there are 48 attachments vs showing the embedded images. Anyone have any idea how to get thunderbird…
L84
  • 3,911
8
votes
4 answers

Word 2013 export to PDF how to keep font vectorized

I have to use Myriad font with Word 2013 (I cannot use other font or software). When export my Word doc to PDF, Myriad font is bitmapped (many pixels). My question is : how to keep the font vectorized (without pixel)? I've tried to go to the option…
S12000
  • 223
7
votes
4 answers

What to do with a Linux OS microSD image file?

I am trying to install Ubuntu on the Odroid U2 SoC (http://www.hardkernel.com/renewal_2011/products/prdt_info.php) From this site I downloaded the "Micro-SD image file"…
JDS
  • 79
6
votes
3 answers

Run ifconfig without sudo

I have an embedded Linux running on a imx6 platform. This is a freescale embedded linux. The problem is that there is no sudo available for this linux, but I need to activate and deactivate the wlan0 device by a user. I tried to add the user to the…
Irgendw Pointer
  • 279
6
votes
2 answers

How do I boot [embedded] linux from sd card?

I am hacking together a quick embedded linux system on a DM816x evm board. Previously I have been using TFTP and NFS to load my kernel and root filesystem to the board. I am now trying to switch over to loading everything from an SD card. I have my…
Brandon Yates
  • 173
6
votes
3 answers

Disable On Screen Keyboard in Windows 7

I run Windows Embedded Standard 7 with a multi touch screen (running on the UPDD driver 4.01.10). The system is running an application in kiosk mode with no need for any other input device. The On Screen Keyboard is disabled in the Ease of Access…
Jens
  • 679
6
votes
2 answers

Difference Between Windows XP and Windows XP Embedded

What is the diiference between Windows XP and Windows XP Embedded environment and pros/cons of both these environments.
subbu
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