Questions tagged [embedded]
The use of Unix in embedded computer systems such as networking equipment, mobile phones, media players, set-top boxes, etc.
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dd command arguments
DECIMAL HEXADECIMAL DESCRIPTION
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6891498 0x6927EA JBOOT STAG header, image id: 0, timestamp 0x25000481, image size: 295211 bytes, ...
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How to get root-Access and/or update/extract firmware via UART
I would like to try to equip my non-specific China-Wall-Brick-WiFi-Router with root access and update it if necessary.
Here is a sample image of the device:
The problem is: The device has no official ...
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Writing to an External USB Flash Drive When Power Could Be Lost
I'm looking into building a small embedded device, probably using a Banana Pi M2 Zero. In any case, the device will not have a graceful "turnoff" - it will simply lose power. However, I'm ...
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drmModePageFlip() is failing when process started by systemd service
I created one Linux(STM32MP157 Olinuxino) application which uses DRM and OpenGL libs. The app is running without any issues when started from terminal. My application calls drmModePageFlip() twice ...
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ALSA: How to duplicate audio so it comes out of two devices at once
I have two devices playback_bt (Connects to BT chip) and aduplex_rtp (which delivers audio to a device/speaker over rtp). I can use aplay to play sound to them individually. I want to be able to write ...
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Is systemd viable for embedded when storage is not a concern?
Excuse me if this is a dumb question. I've been experimenting with this old nas box i bought, cross compiling anything and everything i could get my hands on. And now i want to take it a step further ...
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wpa_supplicant fails to connect with some routers
I have a Yocto Linux device equipped with a Laird 450-0152r wifi module. When the system boots, a systemd service creates an access point using the following script:
#!/bin/bash
modprobe brcmfmac
iw ...
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Fail to set a touchscreen in Device Tree
I'm trying to connect a touch controller via I2C to my DART6UL linux embedded board.
The follwoing if what I add to my device tree;
egalax_ts@2a {
compatible = "eeti,egalax_ts";
...
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Unable to communicate with I2C fuel gauge
I'm trying to communicate with an LTC2959 (datasheet) battery fuel gauge via I2C from my linux-based SBC. I'm not succeeding and I suspect a hardware or device-tree issue.
The IC address is 0xC6 which ...
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Remote control and display of embedded Linux devices
Background information - We have two custom embedded Linux devices that both contain their own GUI for operating and controlling each device and it's software/firmware. The devices are class 2 medical ...
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Keypad driver does not input character with input_report_key()
I am trying to create Linux input device driver and to test things I took at existing gpio-matrix-keypad driver. Using print I know that input_report_key() is called with correct keycode, but it doesn'...
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Embedded Linux - How come virtual kernel memory is bigger than physical memory?
I'm running a custom Linux distribution on my ARM-based system (it's got two A7s).
The Linux kernel version is 4.86.9.
In the process of investigating some weird graphical glitches occuring on the ...
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How would one build a working Linux volume for a 32-bit PowerPC headless platform using a non-PPC host?
Is there a tool similar to debootstrap for a recent Linux distribution that supports PPC so I could build a working system or have an automated process to cross-compile a base install?
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Linux issue on Olimex Lime 2 board after two weeks in operation
I'm working on embedded board Olime Lime 2. I use official Olimex image.
My system contains only a Nginx web server and a Python program.
I'm testing if my system can operate for long periods. For ...
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How to scan barcode in JPEG format with zbar in Linux?
I am working on an embedded Linux system (kernel-5.10.24). Now I am trying to use zbar-0.23 to scan barcodes in JPEG format, but I don't know how to do that.
There is an example/scan_image.c, which ...
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