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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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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Linux enc28j60 driver always times out on transmit

I've wired up an ENC28J60 module with an SPI interface to a Beaglebone Black development board running Linux 3.8, but I cannot get the device to TX (or RX) anything. Every attempt to TX times out and ...
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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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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 ...
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314 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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Finding RAM product/solution for tiny embedded linux system (<1GB)

I'm finding it quite difficult to navigate among the copious memory solutions available when selecting a RAM solution for a tiny embedded system I'm developing. I will run an OS such as PetaLinux on ...
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206 views

RXD line problem

Hi below is my setup block diagram to understand Setup description: I have two board , board 1 and board 2. Board 2 is third party board we purchase. Board 1 has on board SMPS which convert 230VAC to ...
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847 views

beaglebone black doesn't autoboot when powered over jack or vdd pins

I have a BBB and it works quite well however when I power it over the Barrel connector or over the vdd pins rather then use the usb connection it doesn't automatically boot. When I put the barrel ...
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403 views

How to “read” SSD LED display by sniffing it's i2c communications with master?

Firstly I apologise if this question is more of a Raspberry Pi/Linux question but I've scoured the Raspi/Linux stack exchange boards and googled until my fingers fell off so I'm trying here in the ...
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798 views

PCIe card powered but not recognized on custom interface

I have a black magic declink mini recorder card that I am trying to recognize on a small form factor linux machine (debian 3.2.46-1 x86_64). I have made a custom interface board with what I think are ...
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Raspberry Pi with SMBus SmartBattery

I'm trying to interface a Raspberry Pi with the mini-box OpenUPS. It claims to implement the Smart Battery SMBus specifications. I can read data from the device using the i2c_smbus_read_word_data() ...
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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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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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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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Linux Digital I/O Sparkfun IOIO-OTG

I would like to control two RF switches using 2 or 3 digital I/O lines accessible as a USB device in Linux. This is similar to 0x378 parallel ports in ancient i386/i486 hardware. I was hoping to use ...
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Custom PCIe DMA on Cyclone 10GX FPGA burst read stucks

I'm writing a custom DMA machine to read and write data to the host system from FPGA memory. I use the Altera PCIe IP core as end point device in Avalon-MM mode. BAR0 is set as 64bit bar, Avalon-MM ...
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How to set minicom to a baudrate of 6M?

I am using minicom to test the USART from my STM32. Now i want to test my USART at a baudrate of 6 MBaud, but if i type in minicom -b 6000000 it opens minicom ...
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1answer
202 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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644 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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1answer
117 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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1answer
79 views

Is there another way to interface with BeagleBone Black hardware

As an example, to turn on one of the on-board LED's you need to update the text file "/sys/class/leds/beaglebone:green:usr0" In writing some tests just turning on ...
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1answer
228 views

HSPICE -mp -mt options for Ubuntu

I was reading part of the hspice tutorial, I found that, there is a multiprocessing option: "hspice -mp [process_count] -mt [thread_count] -i input.sp -o output_file" "Note: Running both MP and MT ...
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1answer
58 views

Is it possible to access Emulating Data EEPROM of PIC32 using another PIC microcontroller?

I tried to use Flash memory of PIC32MX as eeprom (some address) to store data using microchip library , Is it possible to access created eeprom using another PIC32 microcontroller(i2c) or ARM ?
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315 views

Possible to use both CS1 and CS2 for SPI1 on Beaglebone?

I need to connect two SPI devices to Beaglebone. According to the documentation both SPI1_CS0 and SPI1_CS1 are available on the extension header: SPI1_D0, SPI1_D1 and SPI1_SCLK are available on P9[29]...
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334 views

Connection refused on debugging

I'm trying to debug my dev board here, using LPCXpresso v7.1.1 [Build 125] [2014-04-01] , Manjaro linux (Arch based), and a J-link programmer. Every time I tried to debug my program, I got an error: ...