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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Why don't I need device drivers for a UART to communicate with a Linux box but need device drivers if USB is to be used for communication? [closed]

I have a Linux box. I want to troubleshoot certain things and I was told that I need to custom solder pins to communicate using UART as perhaps it doesnt have device drivers to communicate using a ...
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How to add simulating files on oregano simulator

I would like to start simulating electronics by using Oregano software on Linux Mint. From my experience, once installed oregano and gnucap ...
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30 views

MIPI display driver qualcomm APQ8909W

We are tring to brinup a new display for a Qualcomm APQ8909W chip that's running Android 8.1. From looking at the kernel log during boot I can’t seem to see what display driver is being used/...
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1answer
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USB device detection problem on a Raspberry Pi

I have a device constructed from a Raspberry Pi 3 B and an AVR based USB device. The interconnection of these components is depicted in this picture. When RPI is on, data lines of keyboard will be ...
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Using UART protocol in De1 SoC linux UP distribution from intel

I cant find any example of this, in the "Linux on DE series board . pdf" theres an example with Leds, and in "DE1 SoC computer ARM . pdf" theres an example for UART but is not in ...
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STM32F769I display not showing framebuffer content

I am trying to get video to work on STM32F769I device. What I have done already is that I have changed the device tree so it has the required support and enabled the kernel features required for it to ...
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Configuring UART pins on Beaglebone Black for CAN Interface

I have been using a CAN/RS485 Cape for prototyping CAN control of a motor. I am now in the process of bringing up some custom hardware. I have a CAN Transceiver SN65HVD230D on this custom cape that is ...
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0answers
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FT232H/FT2232H mount as /dev/i2c-x

SBC like Raspberry have the 40 pin header which contains a I2C master. This is a accessible via /dev/i2c-0. I would like to achieve the same thing on my linux laptop (ubuntu) using the FT232H chip. I ...
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SAMD20/21 development on Ubuntu without IDE

As someone who is trying to break away from high-level APIs for embedded development, I wanted to try out programming Atmel's (or Microchip's) SAMD20 or 21 mcus directly without any IDEs or tools ...
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3answers
163 views

Electronics before Linux [closed]

I have been learning about the basics of electronics, and reverse engineering hardware using UART connected to my computer. I find it interesting how I can access the busybox which is Linux and then ...
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1answer
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Can not launch u-boot spl

I bought some SOM modules with AM335x on board (PH8700). The SOM is completely blunk (both eMMC and EEPROM). So I have to build u-boot spl first and load it via XMODEM. The problem is that u-boot spl ...
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1answer
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How to flash binary code to the NUCLEO-F207ZG device?

When I want to upload a binary file executable.bin to the STM32F407G device, I connect it to the PC using the mini-USB cable and execute the command ...
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1answer
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How to flash a large binary file to the 512-Mbit Quad-SPI memory of the STM32F7308-DK board?

I have a STM32F7308-DK board: I want to upload my custom binary code.bin for the board to execute it and display output on the screen. For that, I downloaded and ...
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1answer
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What does it mean to send CAN messages at 10Hz or 100Hz? Is this configurable on Linux SocketCAN

I understand the meaning of message transfer speed, i.e. a theoretical maximum of 1Mbit/second, and the 8Mbit/second in the CAN FD. That's essentially the rate at which bits are travelling on the ...
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1answer
149 views

USB2244 enumeration failure

I have a PCB with a USB2244 USB to SDIO bridge IC connected to a Raspberry Pi Compute Module 3+. I (think I) designed based on the schematic circuit for the USB224x evaluation kit EVB-USB2240-IND. ...
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1answer
167 views

Does Linux regmap handle repeated start/stop i2c transaction?

I'm bringing up ADV7610 on Linux Kernel v4.14 on TI AM5728 platform. The Kernel module for this device is failing to successfully probe the device: ...
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1answer
48 views

Choosing controller/processor when real time feedback control system is required

Currently, I am planning to work on a system, in which we will be gathering the data from the multiple sensor for more than 15 parameters, based on the sensor value we will be controlling the ...
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2answers
193 views

i2cget works, but i2cdetect does not show the device

I'm working to bring up ADV7610 (similar to ADV7611) on a Linux based embedded system (TI AM5728 platform). By all account, I think the Chip-Select, Reset and I2C bus are all configured correctly. ...
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0answers
68 views

CAN bus traffic is destroyed for unknown reason

I am a bit stuck with connecting several STM32F405 with BeagleBone black via CAN bus. Strange things happen when I connect 3 stm32 and 1 BB. I have checked that BB works perfectly with any ...
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1answer
48 views

USB Hub on Embedded Target disconnects and reinitializes causing a crash on Linux Host

I have an imx6 embedded board which is connected through FTDI/USB to a linux host. The embedded board runs a Yocto linux. I send commands to the embedded board through a serial interface (ie. write to ...
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3answers
92 views

Low-power Linux-based ARM system on module for data logger? [closed]

I want to develop a data logger with several hardware characteristics (low-power consumption, SDI-12, I2C, SPI, UART, USB, Ethernet, touchscreen display, SD card, RTC, internal memory at least 128MB......
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1answer
119 views

Slow FIFO read from LSM6DS3

I have been trying to read FIFO buffer from LSM6DS3 inertial sensor via i2c. The processor will read LSM6DS3 buffer every 20s so the FIFO will contain approximately 3120 bytes of accelerometer data. ...
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1answer
95 views

Avrdude Does not Read What it Wrote Correctly

Question I am getting back into Atmel AVR programming after nearly a decade off. To this end, I am trying to get the usual blinken lights demo working. Unfortunately this does not function, though ...
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1answer
72 views

Embedded Development Support plugin does not generate CMake files in CLion on Ubuntu 19.10

I can build, run and debug my old projects. But when I try to import new STM32CubeMX project, nothing happens. No CMakeLists.txt file created. Pressing '...
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0answers
358 views

40 pin signal with 50 pin LCD (AT070TN92)

I have a Lichee Pi Nano board with an Allwinner FC100s SOC. The board has a 40 pin LCD-connector which takes the signals from the SOC and the backlight voltage generated separately. I also have a ...
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58 views

zero cross detection using linux GPIO in C

I am trying to make an AC dimmer and need zero cross detection using GPIO in C, I am using beagleboard. I have seen others using python on RPi so it should be doable but, it seems that GPIO reading ...
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3answers
102 views

Emulation in advance CPU Vs Native CPU

My question is very specific but I might face difficulty framing it well so hope I dont get penalized. Background: Playstation 1, houses 32-bit RISC MIPS R3051 processor, running at 33.8688 MHz with ...
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0answers
121 views

FT230xs USB basic UART converter dropping frames

I'm working with a custom STM32F429 board, I am using serial-USB port (USART1-PA9,PA10) for debug output and diagnostics. When I connect the board the FTDI chip is recognized and proper kernel modules ...
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1answer
91 views

How to enter bootloader on a Embedded Linux System with no keyboard? [closed]

I am trying to reflash a microcontroller. An instruction in the manual states that: Power up the owa4x and press the space bar to enter the bootloader prompt Insert the uSD card with the ...
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3answers
163 views

From microcontrollers to microprocessors [Embedded Devices] [closed]

I was told by some developer that embedded controllers are task specific devices that requires low latency which processor based devices can't offer due to OS overhead. So I would like to first of ...
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1answer
68 views

Interconnect between different blocks of SoC from different vendors

So I am planning to do a learning project of installing embedded linux into to SoC. One from smartphone vendor Spreadtrum SC7731 and the other from generic smart devices vendor Ingenic JZ4725B. Since ...
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1answer
420 views

Connect I2C Oled via USB to Linux Box [duplicate]

I connected a 1.3" SH1106 Oled via the I2C pins to a i2c-to-usb adapter (UMFT201XB from FTDI) and on my Linux Box (Z83 mini pc with Ubuntu 18.04) I can see the device under /dev/ttyUSB0. This is the ...
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2answers
374 views

Errors were encountered loading footprints: kicad_plugin.cpp : FootprintEnumerate() : line 1786

I am newbie in working with KiCad So for first time i tried to generate footprint of one negetive voltage source from here and here: And the Sketch is like this : button and i get this error in my ...
0
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1answer
292 views

Safe shutdown Embedded Linux on Power-Down

I am not very experienced with Embedded Linux, just some projects with the Raspberry Pi. I would like to know if there are any recommended ways to shutdown the Embedded Linux if the device's power ...
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2answers
1k views

What is the role of the ROOT COMPLEX in a microprocessor system (PCI Express)

I have been learning about the Linux kernel and the most common bus type i always encounter is the PCI bus. As an electronics Engineer, i decided to look at how this bus works as it seems to be the ...
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2answers
726 views

USB 3.0 VS MIPI CSI-2 camera interface on Embedded Linux system. Which one is better from both hardware and software perspective?

I have a Sony FCB series camera (1920x1080) and looking for a better interface protocol to connect it with processors like NXP, TI or any similar embedded processor. The camera has a LVDS out port ...
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1answer
146 views

How do I connect a bno055 chip to a Linux pc via an FTDI UART breakout sensor?

I want to create a C++ (or C) program that reads in a stream of Quaternion data from the bno055 Adafruit chip. My set-up at the moment has an Ubuntu PC as the controller. Plugged into the PC is a ...
2
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3answers
249 views

how to determine architecture core detail of ARM11 processor

I'm cross-compiling for an embedded Linux board, based in BCM5892 ARM11 processor. I need to know about architecture detail of this processor(‘armv6’, ‘armv6j’, ‘armv6k’, ‘armv6kz’, ‘armv6t2’, ‘...
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1answer
68 views

Why can't the bootloader save and log messages for us to view later [closed]

I have a problem whereby a remote BeagleBone device is taking hours to boot up. When it does, I don't see any problems in the kernel boot logs such as journalctl -b or journalctl -b -1 Without having ...
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0answers
278 views

How are MBIM transaction ID's supposed to be used?

Situation I am developing a product that will use this Sierra Wireless HL7618RD Cat 1 LTE modem. I am interfacing to the modem over USB using a small SoM running a Debian flavor of Linux. The modem is ...
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1answer
777 views

ST-LINK Version 2 on Arch Linux not working

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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0answers
45 views

Compiling Linux for an H8/532 microcontroller?

Can I compile and run Linux on an H8/532 microcontroller? From what I've read, it is possible for some of the models. Family: H8 Specific Model: HD6475328CP10 Research http://lkml.iu.edu/hypermail/...
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2answers
97 views

Building NXP QN9020 firmware on GNU/Linux?

I just inherited a project that is based on the NXP SDK samples, (not quite sure which one). It is currently being built with µVision 4; but I would like to convert the build system to use ...
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1answer
171 views

PCIe - EqualizationPhase

In linux, do lscpi command: we can see LnkSta2: EqualizationComplete-, EqualizationPhase1- Sometimes the EqualizationPhase1 is EqualizationPhase1+. Can you ...
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1answer
73 views

Set alternative editor for ModelSim

I want to set an alternative editor in ModelSim. I tried How to configure my favorite editor in ModelSim? and after I set the altEditor I get "unknown command external_editor". Unfortunately my ...
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1answer
250 views

How to convert a netlist to circuit diagram? [closed]

I was working on both verilog and ngspice. I found out a verilog can be converted into VLSI CSD design with microwind or qflow. My question is, Is it possible to convert an ngspice netlist to ...
2
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3answers
118 views

Why system energy is equal to 1/f?

I am studying Intel speed shift. I see a slide: Reference I don't understand, why the green line 1/f means system energy, I think more performance should need more energy as the red line (compute ...
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2answers
187 views

Linux (OS) on Custom Hardware (Custom Motherboard) [closed]

We are designing and producing our custom high-speed boards consisting of FPGA and gigabit ethernet signals. Hence, we are not professional for high-speed motherboard design but know some issues like ...
0
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1answer
42 views

Changing the Linux SDK in the embedded platform [closed]

I am using an embedded platform that has Linux SDK version 2. It supports only gcc 4.9.2. Is it possible to configure the system to run gcc 8?
3
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1answer
196 views

How to use the BeagleBone's PRU with a modern kernel?

I am trying to implement a basic LED blinking program on the PRU. Up till now what I found are guidelines for old kernel versions (old in the sense 3.8 to 4.4 kernel version). Details of my ...

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