Questions tagged [embedded]

For questions about software and firmware embedded on hardware.

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14 views

MP4 file embedded in Word doc won't play if doc is read-only

My user manual has several 30-second videos showing the bits tricky to describe in words. All worked well until I made all manuals Read Only to stop users making notes on the Word documents. However, ...
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6 views

Find processes that write on filesystem

I'm working on an embedded Linux system and now I need to mount the rootfs in read-only. Before, I need to find all the processes that need to write to the filesystem. I read this answer, but my ...
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116 views

STLink V2 VCP doesn't show up in Windows

I'm trying to get myself situated to program comfortably with my STM32 Blue Pill and STLink V2 USB interface. However, I've run into an issue when trying to gain access to the VCP (Virtual COM Port) ...
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51 views

STM32L053 - internal command error when i load in keil (µvision5)

I just got my STM32L053 Nucleo64, and i'm stucked when i load on the flash memory with keil (µvision). The error "internal command error" occured. You can take a look at the error details. This is ...
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1answer
198 views

Does CPU Vertical Segment: Embedded mean that it can not be swapped?

Im interested with CPU replace in laptop, but something made me think a lot. I want to ask you simply if there is a socket defined, how can a processor be embedded? Does it work like it can be ...
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1answer
29 views

No response to embedded system's ARP request after successful DHCP

I've been working to get UDP unicast packets implemented on an embedded system, using a Wiznet W5100S internet offload chip. Their libraries enable the negotiation of DHCP, and I have successfully ...
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73 views

File loss due to unexpected reboot during write on f2fs filesystem

I am using F2FS in embedded linux (eMMC flash), and I noticed a lost of logs if device was unexpected rebooted. I have wrote a program that writes to a file in a loop and at one point causes a reboot ...
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54 views

GSM PPP no internet connection

I've referred to 3-4 tutorials about setting up PPP connection using GSM modem. I have a linux OS - i'll be working with this on Mint and Debian. https://www.rhydolabz.com/wiki/?p=16325#comment-...
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28 views

Connecting GDB to a running remote target without resetting

I'm trying to figure out a way to connect to a running MCU (STM32F413, FreeRTOS) and get a stack trace/other debugger info. It's in some sort of stalled state, and I'm trying to figure out how it got ...
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24 views

Checking mounted filesystem

Is it possible to check a mounted filesystem for errors? I have an embedded device with RootFS on SD which may experience "unwanted shutdowns" (i.e.: power-out). Doing an fsck.ext3 -fy /dev/...
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16 views

Multitouch interaction compiled on Linux system with a on/board pc

I assume something is wrong in my setup but can't figure out what it is. I'm on Intel core i7 board with Waveshare touch screen. As Operating system I tried Lubuntu, Ubuntu 18.04, Ubuntu 19.04 and ...
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5 views

1 PowerPoint slide changes can reflect to another main PowerPoint presentation

don't know really this happened in PowerPoint or not. I have one PPT with 200 slides and those are divided in 5 section. I want to share it to 5 different people(Main PPT) but i want they should edit ...
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26 views

Samba share Mac issues

I've got a Pi setup with a small buildroot distro sharing an external drive over samba. It's mounted in /media/Data 1 and I'm sharing /media . The share works great when accessed from Windows or Linux,...
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1answer
50 views

How do I specify which driver is used for a device when more than one are applicable

I'm working on getting a more modern Linux working on a single board computer where the original company has gone under but the hardware is well supported by the open source community. I've made very ...
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89 views

St Link v2 unable to connect (using Arch linux OS )

IMAGE LINK: https://ibb.co/yfFvwQP I am using Arch Linux as my main os. I have just started embedded dev and am setting up my env. I am having an error connecting to my St Link V2 debugger as shown ...
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107 views

Only one of the two ADC channels are being read in STM32F072CBT

I have a STM32F072CBT microcontroller. I am using 2 ADC channels to read: 1. PIR analog sensor 2. Ambient analog light sensor. I am reading correct PIR values but my problem is that the ambient light ...
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133 views

Uboot not executing script

I wrote a script that u-boot downloads via TFTP server and once it is downloaded into memory I want it to execute that script. So the uboot successfully downloads the script and I have tried ...
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0answers
7 views

Unknown error message in workbench

Here is the error message: Can anybody tell me what this warning is about? I am new to embedded programming and I encountered this error while debugging a code for msp430 using IAR embedded workbench....
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0answers
36 views

libnl takes time to see a disconnected client

I am working on an embedded device, with a custom OS (Yocto on iMX6). The device use hostapd to create a WLAN. I use libnl to list the connected WiFi clients, my code is based on iw to get the ...
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6 views

i can't install prefix function for google smart home project

i put command $ npm --prefix functions/ install and i got error npm ERR! Can't install C:\Users\ndrs--kpn\smarthome-washer\washer-start\functions: Missing package version npm ERR! A complete log of ...
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73 views

Error while building ZephyrOS-Firmeware with CMake/Ninja and CPLUSPLUS C++

I want to build firmware with ZephyrOS for nRF52840. I set up the toolchain (on Windows) and everything works so far (Pyhton, West, CMake, Ninja..). I can even build most programs with "cmake -GNinja -...
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14 views

Contol Status Register and Branch On Condition Code Register

Why do we need CSR and BCR when we are writing a Ethernet driver for a PMC card? Why do we need to perform read and write operations to these registers?
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1answer
174 views

How to modify vmlinuz without recompile

As title, I have two vmlinuz files on hang for embedded system. And, I don't have the source and compiler for it, the developer of this embedded system also not work anymore. The first vmlinuz ...
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1answer
86 views

Connecting two devices together with the same ethernet cable (some programming required?)

I'm looking to connect two devices together via ethernet, but I'm having trouble with the steps needed. The devices are one PC and one microcontroller. Both devices will have static IP's, the ...
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1answer
159 views

I want to embed OneNote notebook into my website for interactive experience

So basicaly I want this eperience: Example But the thing is I don't have SharePoint included in my subscription and I want to know if there is any other way to achieve this. Here's the procedure of ...
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39 views

BOA hang - how to detect this and take action for this

I am having a SDK which has a boa webserver running in it to server HTTP requests. It is seen that at times the BOA server hangs. The boa server is not dead as it is shown in the device as running ...
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1answer
290 views

Issue in HFP/HSP bluetooth profile in Linux

I am attempting to implement hands-free telephony on my board, I successfully connected my android phone to the board via bluetooth module(QCA61X4A) in phone and media audio sharing mode. I was able ...
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212 views

STM32L053 I2C problems with LIS3DH sensor

I'm trying to recover the data from the LIS3DH sensor and I found this tutorial on YouTube. In the tutorial the person uses the following to see if the sensor is ready for use: if(...
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1answer
2k views

PowerPoint Slideshow Error: Server application, source file, or item can't be found

When I double click charts embedded in my PowerPoint slideshow, the following error shows: The server application, source file, or item can't be found, or returned an unknown error. You may need to ...
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1answer
3k views

Windows 10 Disable Welcome Screen

Is there a way to disable the welcome screen in Windows 10? I already found an option to disable the lockscreen and the boot screen, but the welcome screen with the username and account image still ...
33
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3answers
8k views

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

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 ...
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35 views

PDF's, embedded files get stripped away

We download some PDF's from a webapp. This PDF's contains a XML file embedded. On some Windows client machines this embedded files get stripped away and we cannot find any program o specific process ...
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68 views

U boot send failed: Error when trying to load a u boot image

I am trying to load a uboot image on a PCB. The board uses a pre-configured script in which it attempts to boot the board and, seeing that there is no boot image, it downloads the image over Ethernet ...
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2answers
473 views

Non-Persistent Linux from HDD

I am developing a embedded product that will be running linux on hardware similar to a raspberry pi but with internal storage. I would like it so that the power can be cut to the machine and have a ...
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0answers
411 views

Build my own kernel on BeagleBone Black

I am trying to put an operating system like FreeRTOS onto the on-board storage on my Beaglebone Black via an SD card so that whenever I take the SD card out and restart, it will boot my new OS. I have ...
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0answers
203 views

Disabling Windows 10 update forever, Embedded use

I have 50 computers with windows 10 pro I disabled Windows Update Service I connected them to internet once to activate the windows These will be on 24/7 for an embedded project and never connected ...
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1answer
1k views

Why embedded linux(yocto) can't use whole memory of rootfs partition?

I've build Linux image with yocto and deployed it on IMX6qpsabreauto board. Filesystem was deployed on a second partition of SD Card formatted to ext4. Everything seems to work fine except that I ...
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0answers
305 views

Do real time operating systems support paging? [closed]

Is it possible to run multiple processes, not threads, on a microcontroller using an RTOS? If not, I can't see a reason for not always using a flat memory model? Without multiple processes, I can't ...
0
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1answer
38 views

Find out wep key from embeded client

im kinda stuck here i have an embedded system i was given from a friend that connects to a wifi network to configure it unfortunately he cant remember the WEP key that was used to connect it. is there ...
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1answer
169 views

windows 8.1 embedded industry with no WI-FI

I just installed windows 8.1 embedded industry on my Transcend storejet M3 and its working perfectly. But here comes the big issue no WiFi 📶 in the connection settings is just proxy and VPN in ...
0
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1answer
1k views

Where do I find the default baud rate for screen (on Mac)?

This command works fine: screen /dev/ttyS I don't need to set a specific baud rate. Do you know what the default baud rate is, or where I can find the default baud rate that is used?
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1answer
761 views

Can't find an internal IP address of device connected to LAN

Local LAN, Ubuntu laptop and Viasat Surfbeam SM2101 modem are connected to the router, wired connection. I can't find an internal IP address of satmodem connected to the router. Router only show ...
3
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2answers
327 views

What font format is this?

An E Ink display I bought supports displaying text using a built-in command. According to the documentation, it also allows me to load a different "font library" for Chinese characters: Font ...
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0answers
96 views

How to create embed script file from script file with certficate

I have one certificate test script file, Checking_file.sh file ="/var/cert.pem" openssl x509 -checkend $(( 86400 * $DAYS )) -in $file > /dev/null its works file, But, I don't want to share my ...
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1answer
201 views

Install NAS4Free on embedded linux

My device has two usb ports and a a/b port, an ethernet port and some audio-video ports.I also can access it via Telnet (PuTTY). I want to install this OS, can i ? and how ? THX
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1answer
72 views

How to move data on internal storage of embedded linux?

I am working on development of device working on embedded linux. When working with new hardware versions of it, when I mess up, I have an image that I can copy using dd to SD card, boot from it, and ...
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1answer
666 views

How to get serial number or UUID from MTD device?

I have an embedded device with MTD device over NAND flash. Is it possible to get its serial number or UUID? I thought there might be a solution similar to getting UUID of hard drive but I didn't find ...
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1answer
550 views

How much faith should I put in Unified Write Filter?

I have a requirement to create a windows build which is ultra reliable. It's possible there will be frequent power loss on the PCs which I need to try and ensure this doesn't have a negative effect on ...
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1answer
1k views

Laptop uses eMMC as main storage

I have an HP laptop (http://www8.hp.com/ca/en/products/laptops/product-detail.html?oid=1308672). I hope not mentioning it explicitly doesn't violate stackexchange's policy. It uses eMMC as the main ...
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0answers
674 views

My UART receive a null character sometimes

In an embedded system, I use a GPS with others devices connected on 3 UARTs. When I use cat or minicom command with UARTs /dev/ttyUSB0 and others, I lose characters (I receive null character instead ...

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