embedded-linux Questions

3

I am looking to create a utility that validates Embedded (PPC or ARM) Linux *.dts (device tree source) or *.dtb (binary) files against an XML configuration file from another tool. So, I need ...
Kaspar asked 4/7, 2010 at 20:2

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Using the legacy sysfs GPIO under Android and Linux the first step in the process is toe export the particular GPIO pins you want to use. And when you are done with the GPIO pin to unexport it. I'v...
Suborn asked 6/9, 2020 at 22:23

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Note: The general question is in bold at the end of this post. I'm trying to build PostGIS 2.2.7 with Yocto (Rocko) for my Linux i.MX6 based embedded system. First of all, I have installed Postgre...

2

I am referring to the code in this answer. I added error handling though. The open() erase and the read() all perform without error and the 20 bytes that I read all are 0xff. However, when trying ...
Saurian asked 19/6, 2014 at 8:37

3

I have a program written in C running on a embedded Linux, sometimes it want to check the password of a system user. If I can get the crypt salt of /etc/passwd, I can use crypt() to check the co...
Downwash asked 6/7, 2013 at 2:42

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I have a Hikvision IP camera that I'm doing security research on. (Model DFI6257E, looks like a Taiwan exclusive model. ) After dumping firmware from its flash and analyze it with binwalk, I found ...
Armoire asked 23/6, 2020 at 8:37

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I'm a computer engineer student and I'am having problems with my new project: A small screen that show car information and such. A reeeeeally simple version of a carputer. It's been 1 month wit...

2

I am trying to move our Tensoflow model from Python+Keras version to Tensorflow Lite with C++ on an embedded platform. It looks like I don't know how set properly input for interpreter. Input sha...
Crore asked 20/5, 2019 at 14:16

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I have been researching widely on this topic, but still haven't found a proper guide. What I am doing is to create a GUI for an embedded system based on Linux Embedded and I would like to know if:...
Transsonic asked 28/1, 2020 at 9:2

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I'm writing a linux kernel driver and for every function that sends data up to userspace or reads data from userspace, I am using copy_to_user() and copy_from_user(). My question is: do I need to u...
Avelin asked 1/4, 2015 at 17:42

1

I need to SSH to an embedded device, launch a background program, then disconnect and keep the background process running. The problem is that the embedded device is using the ash shell (NOT bash o...
Seidule asked 17/4, 2015 at 16:11

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The old versions show am335x_boneblack_defconfig(branch v2017.01 instead of the master) file inside the directory but I am not able to see it in the newer version.So which branch should I use to bu...
Apostle asked 22/3, 2020 at 21:22

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I am experimenting with Yocto project for generating custom Linux images for my embedded devices. I have a requirement to add a persistent custom kernel parameter to /etc/sysctl.conf of the genera...
Dorm asked 17/7, 2019 at 7:56

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I am compiling Linux Kernel to my ARM board. I have seen file called vmlinux generated in kernel root folder. Can someone give good explanation about this file and it's use.
Weslee asked 26/12, 2016 at 5:1

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I want to use libgpiod to control a few GPIOs via userspace on a custom board. I have an i.MX6UL processor, which has hundreds of pins, I'll use only 8 of them (as GPIOs). I read about the libgpiod...
Cardholder asked 6/2, 2020 at 17:52

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I'm trying to connect to a bluetooth device on embedded linux. BlueZ version is 4.101. Local bluetooth adapter is an USB Bluetooth dongle Trendnet TBW-107UB, for all tests. I can't provide det...
Glick asked 19/5, 2015 at 9:5

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We want to build a embedded Linux device using Yocto which is SELinux Enabled. I was looking at meta-selinux layer Dependencies. Dependencies This layer depends on the openembedded-core meta...
Towner asked 30/9, 2019 at 6:33

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I am sorry for naive question. I could not understand the difference between these Yocto variables. The Manual says TOOLCHAIN_HOST_TASK: Lists packages that make up the host part of the SDK (i...
Diphase asked 7/2, 2020 at 12:14

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I have a target board running linux which has approximately around 5 million+ files in the directory. (This directory doesn't have any sub directories) If i execute this program it takes several mi...
Scrimp asked 16/11, 2019 at 8:59

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In Yocto-based Embedded Linux distributions, I am really interested in finding the complete list of packages/recipes/kernel modules from each dependent layers that will be built and installed to an...
Meridithmeriel asked 22/10, 2017 at 20:6

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I'm in charge of choosing a file system for an embedded Linux device. The device is a Freescale iMX6 running with a eMMC NAND flash memory and a kernel v3.10.17. I plan to partition the Flash as d...
Aarika asked 10/4, 2015 at 15:45

3

I am currently building an Embedded Linux for my Zybo Board from Xilinx. For this I use Buildroot. Now I want to add a driver, written in C, which can be used by a user program to write to some spe...
Altercate asked 28/10, 2016 at 14:29

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From the spec, I knew the following information: JGPIO1 PIN# :10 SoC GPIO # : 71 USE select: IO 0x532[7] ( 0 = native function, 1 = GPIO ) IO select: IO 0x536[7] (0 = output, 1 = input ) Leve...
Oblast asked 3/12, 2015 at 6:2

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What is the difference between IMAGE_INSTALL and IMAGE_FEATURES in Yocto. I have seen to enable splash screen in Yocto. We need to write the following to local.conf IMAGE_FEATURES += "splash" W...
Aback asked 4/7, 2019 at 3:23

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GPUs and VPUs need contiguous memory. CMA and Static memory allocation are the examples of contiguous memory. Why is contiguous memory required here?

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