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Questions tagged [linux]

Linux is an UNIX like open source operating system written by Linus Torvalds. There is a spin-off of Linux OS for EE called "Fedora Electronics Lab". If your Linux question isn't electronics-related, ask on one of the other Stack Exchange sites. Stack Overflow, Unix & Linux or Super User are likely what you're looking for.

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Debugging dual LVDS display panel color issue

I'm on TI's AM5708 platform (custom board) trying to drive this Full HD panel via TI's DS90C387 Dual-Pixel Display Interface. The SoC outputs 24bit RGB into ...
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1answer
46 views

USB Power Only - Detect Device Plugged In

I have a project that I need to complete for work. We have been working on this project for a while, however I have come to a bit of a road block. I'll first lay out the important points. We have a ...
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2answers
96 views

Software needed for ATMEL ATMEGA8A-PU microcontroller in Ubuntu 18.04? [duplicate]

A few days ago I discovered a ATMEL ATMEGA8A-PU microcontroller and I wanted to write code on it . But I don't know what software to use in Ubuntu 18.04 for the microcontroller. Can I use the Arduino ...
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0answers
34 views

Which chip is NVRAM on?

Where is NVRAM(Non-volatile random-access memory)? Which chip is NVRAM on? Is it on Flash, CPU or RAM? I have an embedded Linux router, which according to google has ...
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1answer
58 views

What does it mean when i2c_smbus_read_byte() returns 0

i2c_smbus_read_byte() returns a negative value when there is an error in reading data. But what if it returns 0? Following is the code from adt7316-i2c driver ...
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0answers
15 views

Enabling I2S on Qualcomm Snapdragon 820 board

I'd like to configure a Qualcomm Snapdragon 820 board for I2S communication as an I2S slave to an external codec. Currently, the board has some GPIOs that can be configured for I2S function. How can I ...
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1answer
66 views

LVDS display troubleshooting

I am currently working on a prototype connecting a SOC-board (Samsung ARTIK530) to a LVDS LCD display (DT070BTFT-PTS1). The display shows a very (!) distorted picture. I have tried fixing it using ...
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0answers
17 views

PH-8700 SOM reflashing eMMC

We want to integrate PH-8700 SOM in our design (system on module with TI AM335x CPU). This SOM contains pre-flashed eMMC with some linux kernel and rootfs. What if we want to reflash eMMC with our own ...
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1answer
74 views

Avalon-ST PCIe root port in an FPGA

A buddy of mine and I have a project in which we have to implement a PCI Express rootport. I haven't read the entire specification, nor do I have the Mindshare book that everyone recommends, but I ...
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1answer
46 views

AVR programmer necessary? [closed]

I have an atmega168pb and I've noticed that there is a difference in how the board can be programmed between Windows and Linux. On Windows using Atmel Studio you can select an ISP interface and it ...
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1answer
131 views

which IDEs are available for Freertos with Stm32 IDE for Linux? [closed]

Is there any IDE available for Freertos or Stm32 for specifically only for Linux other than Keil uvision. because I found out that Keil uvision is the most stable IDEs available out there for embedded ...
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2answers
84 views

Booting from SD card in SPI mode

I want to boot an ARM Linux board (Allwinner H3 for example) from a generic (micro) SD card through an SPI interface. Can an SD card accept SPI communication right away or is there any "SPI mode ...
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1answer
137 views

SPI comunication - Only receive 0xFF (Linux)

I've been stuck in setting up the SPI communication in Linux and can't figure out any solution. I working with a beagle bone black, which runs Linux. I have a piece of code that send data through the ...
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0answers
268 views

Dual MIPI cameras on Firefly RK3399

I am trying to set up dual MIPI cameras with a Firefly RK3399 development board running Android as 'demonstrated' here. The RK3399 has dual MIPI-CSI camera ports which can be used with an OV13850 ...
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0answers
29 views

Controlling GL646USB GPIO pins

I have this USB scanner from my dad that was made back in 2002, that apparently uses an old all-in-one GL646USB chip from Genesys to control the stepper motor, CCD sensor and provide some GPIO pins. ...
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0answers
36 views

Embedded Linux Custom Boot Sequence

I’m working on a custom boot sequence for my Arria 10 SoC Demo Board. Rbf files and U-Boot should be in QSPI Flash, and Linux Kernel and RootFS are in SDMMC. I have no idea how to reach MMC memory ...
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1answer
145 views

Command line interface for KiCAD

Is there a way to produce Gerber files from command line in KiCAD (Linux/Unix) or a tool which can do it for me? The same question for SPICE netlist and BOM xml? I need it to automate this process ...
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0answers
25 views

Confusion in walking 1s test on data and address lines of DDR3 to figure out address/data line shorted/open connection

We have beaglebone black based custom board with 256MB DDR3 RAM and 4GB eMMC. We are having two different kinds of DDR3 for our boards. MT41K128M16JT - 16 Meg x 16 x 8 banks : Size 256MB MT41K256M16 –...
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3answers
67 views

Use existing WiFi hardware as an RF receiver? [closed]

I have seen mine & many others' (Android) devices nowadays have WiFi hardware capable of connecting with 2.4Ghz & 5Ghz APs. Wanted to know if I could tweak the WiFi driver in the kernel source ...
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1answer
271 views

Testing STM32 USB CDC TX and RX with 2 Linux terminals

I programmed a simple USB CDC (virtual COM port) communication on a STM32L476RG with STM32CubeMX and HAL : when the MCU receives the command "LDRT", it toggles a red LED on the board, and sends its ...
2
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2answers
72 views

How to open up serial terminal for my USB device converter (or, how to enable VCP in linux)?

I am using a new Cyclone V SoC board by Enclustra (Mercury+ SA2) mounted on their PE-1 BaseBoard. To connect to the board serially on Windows platform, I have to connect the board which is detected ...
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2answers
156 views

socketCAN vs OEM drivers

I have a Kvaser mPCIE card on my embedded Linux machine. Most standard Unix distributions come with a socketCAN driver module which takes care of any CAN devices present in the system, hence I can ...
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1answer
93 views

Set of Gerber layer files (*.GBO, *.GBP, …) and how to merge them into a single file in Ubuntu

I'm new to electronics and PCB projects, but I would like to be able to print a board for the following (so-called) power board: Here's the project: https://github.com/mlab-upenn/f1tenthpublic/tree/...
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2answers
86 views

How do you develop with CAN bus? [closed]

I'm pretty new to CAN bus stuff and I'm a bit confused about how should I start the development. There are a lot of different USB-CAN interfaces, but are there "easy" ways to generate test traffic ...
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0answers
112 views

Altera Cyclone V device tree

I have DE0-Nano-SoC board from Terasic with Cyclone V FPGA and I'm trying to build device tree blob to use my modules in FPGA with Linux. I tried to follow intructions on Rocketboards like this or ...
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3answers
403 views

SPI interface returns only ones (0xFF)

I'm trying to register an SPI device to my Angstrom Linux (kernel version 3.10) in order to use an ADC chip (LTC2258) for my custom board. Processor that I2m using is Cyclone V, and FPGA handoffs ...
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0answers
34 views

Atmel Image Sensor interface

I'm working on Microchip SAMA5D27SOM Evaluation kit platform. I'm trying to interface TVP5150AM1 Video decoder to image sensor controller(Atmel-ISC) interface of the processor. I have configured the ...
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2answers
179 views
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2answers
48 views

Change memory content of FPGA SoC (DE1-SoC) using software while .sof (EPCQ) is running on FPGA

I am new to FPGA and FPGA-SoC world. I have a DE1-SoC board. I am doing a project. Hardware design of the project contains a memory block which is initialized using .mif file. I know that we can use ...
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1answer
444 views

Uclinux vs Linux [closed]

Searching Internet, I found an operating system called uclinux which can run on ARM Cortex-M7. How is it different from the orginal Linux which runs on PC?? What about librarys such as QT GUI? Is it ...
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1answer
188 views

How can I get GPIO working on the Orange Pi Zero Plus (v1)?

When running the pyA20 library in python I get the error: AttributeError: module 'pyA20.gpio.port' has no attribute 'PA0' Or when running gpio readall I get the ...
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0answers
71 views

Ngspice gives a “Can't open viewport for graphics” error

I'm on Linux (Solus) and can't plot anything with ngspice. It is having trouble communicating with X11. When I try to plot it gives the error stated in the title, no matter how I start the software. ...
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1answer
51 views

ARM SoC UART interaction with peripheral UART

I am sorry that I couldn't find this answer in this site or web. I have an ARM SoC(Host) which needs to communicate with the peripheral having ARM Micro controller using UART. Linux runs on top of ARM ...
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0answers
85 views

ov5642 detected but registers read and write is failing

I know that OV5642 uses SCCB interface which is different from i2c as it doesn't care of ACK's so it won't be detected in i2c probe. I have connected all as per the settings and my Linux driver probe ...
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1answer
85 views

What is the Microcode in the Intel's Linux Microcode update?

I am a bit confused as to the use of the word microcode in the following links: https://downloadcenter.intel.com/download/27591/Linux-Processor-Microcode-Data-File?product=873 https://newsroom.intel....
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1answer
2k views

Connecting to WiFi at boot on an Orange Pi Zero

I'm using an Orange Pi Zero as a base for a WiFi radio. The basic operation should be Boot Connect to Wifi Load bash script using MPD/MPC to connect to wifi stream Set volume Check potentiometer ...
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3answers
106 views

using an ADC under Linux for automated current monitoring setup

I'm a slightly overchallenged undergrad ee student. I'm working on a project where I'm supposed to build an automated setup to measure hard disk currents over time. I want to use a Current Shunt ...
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1answer
52 views

i2c probe happens only alternatively

I have connected a NXP NFC Module (pn7120) over I2C to i.MX6 Board. I tried to check whether the device is detected in the i2c probe command. It didn't detect in the first call, but got detected in ...
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0answers
40 views

flashbench tool evaluates flash read speed. Is there some code to evaluate the write speed of flash memory (e.g. USB memory disk)

I've been working for a while on a storage system. I could evaluate the read speed of diffrent flash memory disks using the tool flashbench, and actually I'm trying to find some way to evaluate the ...
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1answer
251 views

alternative to NAND chips

The company I work for is manufacturing a device with ARM processor and embedded Linux. At the time of the project (a few years ago) our consultants relied on NAND flash chips with UBIFS as filesystem,...
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1answer
51 views

Raspberry Pi CM does not start [closed]

I designed a motherboard for RPi Compute Module (v1). The compute module is flashed with Raspbian and I confirm that I can see the root console on its pins (GPIO14 and GPIO15) when plugged into its ...
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2answers
255 views

Video compression using low power processor

I'm trying to build a hand held camera with video recording feature. Basic features of camera are Resolution: 640x480 Frame rate: 25/30Hz Video format from sensor: 8-bit grey scale BT.656 (Sensor ...
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1answer
410 views

i2c read error but probe succeeds

Can you please tell me a scenario where i2c probe gives the slave address but i2c read command fails..
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0answers
185 views

Linux GPIO configuration for digital input/output

We are using an embedded computer running Xubuntu 16.04 called AEC-6612 Rev. B. This computer is capable of digital input/output using its DIO pins. We have been using the following scripts in order ...
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0answers
143 views

MIPI DSI Screen Misaligned

I'm currently trying to integrate a 4 Lanes MIPI DSI screen to an iMX6 custom board. As the iMX6 doesn't provide any 4 lanes MIPI output, I am outputting via HDMI and converting the signal through a ...
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4answers
131 views

Linux on board without 3rd party modules. Where to start? [closed]

I would like to be able to design my own Linux board the way I design my own micro-controller boards. The complexity is obviously going to be higher from PCB design and assembly point of view, but I ...
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2answers
373 views

HDMI (ADV7511) Output Design on Zynq zc702

I am relatively new to embedded systems, so please forgive my ignorance. I am attempting to build a hardware design in Vivado which supports console output on HDMI, using the Zynq ZC702 running ...
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1answer
148 views

Is it possible for someone to build a linux embedded board at home? [closed]

I am wondering if it is possible to build an embedded linux board at home that has basic features like USB , serial and linux support but is powerfull enough to drive an LCD. I have looked at this ...
5
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1answer
562 views

Altera Cyclone V - Linux & FPGA interrupt handling

I need to propagate an interrupt from my custom FPGA IP core to the HPS system of a DE0_nano_SoC (Cyclone V HPS-FPGA architecture) and handle in Linux. I have googled quite a lot to confidently say ...
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0answers
51 views

How can I make a PL-only program for ADAU1716 work along-side PS as well?

I'm working on an Avnet ZED-BOARD; that uses the Zynq 7000 All programmable SoC. Currently working on making the audio part of the Board work. The Zedboard has the ADAU1716 Audio Codec. I found this:...