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35 views

USB device to measures mains voltage [closed]

I'm looking for a usb device that I can connect to an outlet and measure the voltage. It doesn't have to have a high sample rate, once a second would be great. Resolution only needs to be about a ...
0
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0answers
42 views

Is it possible to encode a mpeg2-ts video with a FPGA linux core?

I need to take an unencrypted HDMI input, buffer that to memory, overlay it if possible, than encode it as mpeg2-ts and output it to an external device. I could do that with a raspberrypi and an ...
-1
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0answers
47 views

porting a linux driver to PIC

alright, basically, i want to use a SnadPIC, a 32-bit PIC MCU with OTG powered board (http://easypickit.weebly.com/) to interface with RTL8188SU, a single chip implementing 802.11gb/g/n, with ...
2
votes
0answers
23 views

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 ...
1
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0answers
38 views

Is there a way to disable an UART terminal? [closed]

I have an embedded PC running Linux (master) and communicating with an external board (slave) through an UART terminal. Only 3-wires are used: RX, TX and ground. The power of the slave board is also ...
0
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0answers
50 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 ...
2
votes
1answer
42 views

read all of 256MB NOR flash, but only erase first 139MB from Linux - uboot is all good [closed]

Background: I recently upgraded my 64 MB NOR flash on my PowerPC (P2020) embedded board to a 256 MB NOR flash. (The board has 2 GB of DDR RAM.) I had to decrease the page offset to provide enough ...
1
vote
1answer
62 views

Any Cortex-M3(LPC1768) compilers for Linux? [closed]

Are there any uVision alternatives for Ubuntu/Linux?, i know about LPCxpresso, but i just don't like it and its only for LPC MCUs. i tried Googling and it didn't help, I only saw results about ...
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1answer
94 views

Confused, Is raspberry pi a real device for learning embedded linux or just for hobby? [closed]

and sorry i couldn't think of a better title, please read this so you can understand what i am asking: I already bought the Pi, but as i see it has a fully featured pc like OS, what i'm seeking to ...
0
votes
1answer
47 views

How to troubleshoot a TI launchpad not running under Linux?

I have no experience with microcontrollers, except for a project a friend started with me and then abandoned midway. I still have the hardware and the code, want to complete the project, but I have ...
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3answers
73 views

Designing a Single Board linux computer [closed]

I'd like to design a single board Linux computer, maybe something ARM-based but I really don't know that much about the hardware side of computers. Does anyone know where I could get some information ...
0
votes
1answer
117 views

K150 PIC Programmer on linux with usbpicprog?

I'm to search a low cost PIC programmer to use with Debian Linux. On another post i see a comment about use the usbpicprog programs to write .hex files. With the usbpicprog.org softwares, you can ...
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0answers
69 views

AVR USB by atmega8a in linux

Im using linux ,I made AVR USB by atmega8a everything is correct in micro and pc ,I can led off and and on but ,I have problem i can’t do this by usb cable (error : Could not find USB device!),I’m ...
0
votes
1answer
131 views

ARM Processor or FPGA to video signal processing? [closed]

I want to design a PCB where a video camera will take images and they will be shown in a display HD. So I have several questions in order to achieve it: I would like to know what is the best option ...
3
votes
1answer
139 views

Composite HID gamepad descriptor works on Windows but not on Linux

I am building an USB adapter for an old game controller. So far everything is working fine. My HID descriptor looks like this: ...
0
votes
1answer
44 views

How to attach/interface an ARM Cortex SoC with an stm32 processor

I'm trying to work out the best way to attach / interface an stm32f processor with a Linux based ARM SoC? Is it possible for the stm32 to communicate with the ARM SoC via I2C ...are there any ...
4
votes
2answers
238 views

What is the difference between context switching and interrupt handling?

I'm an embedded developer. I haven't worked with RTOS/linux. I was going through RTOS concepts when I stumbled upon 'context switching'. I understand that when context switch occurs, all the registers ...
1
vote
1answer
75 views

New PowerVR Support Introduced to ARM Cortex-A Embeded Processors [closed]

I understand that ARM Cortex-A and their graphics processing is a highly problematic section in GNU/Linux world I have heard due to the fact that Open-GL is not so much developed to the extent it is ...
0
votes
1answer
76 views

nRF8001 DevKit usage with FPGA and Embedded Linux

I would like to develop an application with Nordic's nRF8001 DevKit. The master emulator of this kit is an USB Dongle and it is originally meant for PC connection. My final goal for the project is to ...
0
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1answer
204 views

libmodbus trouble with reading from slave

I have the following code for connection to a temperature sensor as my slave using the libmodbus library in C, ...
0
votes
0answers
201 views

SPI LCD Screen on OpenWrt based hardware using Atheros AR9331

I'd like to connect a graphics lcd 240x64px to my OpenWrt based hardware, which is based on Atheros AR9331 MIPS architecture. The development board I'm using has SPI outputs... I've been using the ...
1
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0answers
45 views

Connecting a Embedded Device from Cloud

I am working on a Embedded Device using Linux operating System. The device is having a local database for storing sensor information and motor state. This device will be used for controlling a motor ...
1
vote
1answer
145 views

External MMU for cortex-M

The Cortex-M processors are getting faster and more powerful. The Cortex-M7 has just been announced. Yet these cannot run Linux (other than uCLinux) because the chips lack an MMU - Memory Management ...
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0answers
239 views

AVR dragon, Ubuntu and avrdude failed to sync

Don't panic if this seems a huge question, I just tried to add as many details as posible, but I guess most of them can be ignored and still get to the point. I am trying to set up my avrdragon to ...
1
vote
1answer
71 views

What are similarities between RTC DS1374 and RTC DS1307

I mostly work in software and not good in reading Hardware data sheets. I need help in understanding the similarities between RTC DS1374 and RTC DS1307,From below link I could make out that both ...
1
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1answer
81 views

Update ATmega168 program with serial

I'm working with an ATmega168 with a Linux based board (TI DM365). The ATmgea168 communicates with the TI over UART. The Atmel is programmed using AVRMKII and is running fine. I was wondering if ...
1
vote
2answers
689 views

How to use k150 pic programmer on Linux?

I'm trying to start with PIC microcontrollers. I bought this programmer: http://www.kitsrus.com/pdf/k150v2.pdf and a 16F628A. But I'm not able to use it with my Arch Linux... How can I do that? Thx ...
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0answers
175 views

Beaglebone black i2c-1 file write error

I am using beaglebone black i2c2 pin 19 and 20 of p9. Somewhere in the bet it was told i2c2 has told accessed with i2c-1 in /dev folder. I am booting default amstrom linux from emmc. Hardware is ...
0
votes
2answers
199 views

Serial Over IP or USB over IP?

Need to connect remotely to a device using cellular GPRS gateway. Device supports RS-232 and USB. It boils done to two options: 1.- Serial Over TCP/IP (Serial to Ethernet - to GPRS, or Serial to ...
0
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0answers
48 views

Installation of IceCube2 on Linux

I am trying to install the Lattice IceCube2 software on my linux box (i am using Fedora 20 64bit) but i only get the message that the binary installer cannot be executed. Does anyone know how to ...
1
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2answers
113 views

Linux-friendly PICs to timestamp an intermittent 4 µs long TTL pulse

I've got an experimental box of tricks -- the console of an MRI scanner -- that spits out a 4 µs long, +5V TTL about every 100 ms, when something interesting happens. I'd like to ultimately create a ...
1
vote
1answer
251 views

How does UBI determine a NAND flash block is bad?

I understand that if a block erase fails it can be marked as bad. If a page write fails immediately it can also be marked bad. I have a board that shows "read disturb" and/or "program disturb" errors ...
0
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2answers
158 views

Is it possible to change a USB's enumerated descriptors (from the OS side) after plugging it in?

I don't mean as in change the descriptors built into the device, but the descriptors that the OS has enumerated. Can this be done from the OS side without touching the USB device? For example, can I ...
0
votes
1answer
43 views

TI TLV320DAC32 vs TLV320DAC33

A board I'm working on has been populated with a TI TLV320DAC32 sound codec. My target O/S is Linux and quickly looking in sound/soc/codecs I see support for the TLV320DAC33. Octopart, DigiKey, even ...
5
votes
3answers
636 views

Is it normal to have SPI Clock with varying duty cycle?

I am working to get an SPI interfacing radio module on embedded Linux system. This particular module (RFM12B) is already ported onto Raspberry Pi. Now I am working on OMAP4 based systems. I noticed ...
1
vote
1answer
555 views

Xbee configuration with X-CTU on linux

I'm trying to configure an XBee with the X-CTU tool using Wine. I followed the steps given in this tutorial. I plug the USB in and check the kernel logs to see on which serial devices it has been ...
1
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0answers
49 views

LPC1343 take forever to mount in ISP mode on ubuntu. How to speed up the process? [closed]

When i plug the LPC1343 in isp mode on my usb port on a linux machine (ubuntu 14.04) , i have to wait between 10 and 20 seconds before the mount apeared. After that, i use the simpleflash.py python ...
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votes
2answers
72 views

Quartus II hangs when trying to create new project [closed]

I have Quartus II installed under Ubuntu 13.10. It starts up fine, but when I click "finish" on the "Create New Project" wizard, it loads infinitely, stuck at 0%, then stops responding. I have tried ...
0
votes
1answer
335 views

Most reliable Flash memory for an embedded Linux system?

What would be the most reliable Flash memory hardware to use for an embedded Linux system? I.e. one that has the least chance of losing data or getting corrupt when the power goes down? The Flash ...
3
votes
2answers
184 views

Periodic timer (64Hz) with ARM processor and (embedded) Linux

I want to call a function 64 times per second with a ARM processor which is running linux. (ex: Rasberry Pi or Freescale i.mx6). Ideally, I don't want too much jitter. I want to perform a task ...
0
votes
0answers
91 views

NAND: no devices available

I am trying to run FALCON MODE on zynq-microzed board. I am following README-falcon.But when i run nand read 82000000 kernel command, i get this error.. **no ...
2
votes
1answer
48 views

IEEE 802.11 standard on channels

Could someone please help me find (page#) where in the IEEE 802.11 standard it directly says that Access Points are responsible for choosing the channel/frequency to be used and not clients. I know ...
2
votes
0answers
41 views

Memory mapped peripheral on NAND bus

I have an embedded system that is not cost effective to roll a custom PCB therefore my access to certain buses are limited. I had the idea of hooking my FPGA up to the unused NAND port of the system ...
2
votes
4answers
454 views

USB as a local bus in an embedded system

Is USB a reasonable choice for a local bus? what are pros and cons? what reliability concerns are there? Bus spec device count ~4; peripheral devices are permanently connected to same PCB as host ...
1
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0answers
82 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: ...
1
vote
1answer
272 views

Why Linux doesn't get booted automatically only If I changed the BOOT.bin not the zImage, while in the first case it gets automatically booted

I have zynq board ( not the zedboard), it doesn't have all the peripherals of zedboard. I am facing some problem while booting the linux on zynq with my new BOOT.bin. When I used to put the sdcard in ...
0
votes
1answer
82 views

Synthesis of Verilog code in Cadence

I am trying to synthesize my Verilog code, which I wrote using Modelsim tool for 8-bit MAC in Cadence Encounter. The file that is generated after synthesis has to be re-checked for functionality in ...
0
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0answers
211 views

UART takes some “kicking” to start receiving data

I am using a UART on a single board computer (Olimex A13) and I am trying to send and receive data through the UART. On the send side I have no problems. The Olimex board sends data to the serial buss ...
1
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0answers
56 views

Enable and access AUART on iMX28

I designed my own PCB with a iMX28. I based my design on the mx28evk board and I use Yocto + Linux kernel 3.12 + the devicetree for iMX28EVK. Because my design is not the same than the mx28evk, I ...
1
vote
1answer
176 views

checking uart overrun and framing error flags in linux

Checking uart overrun and framing error flags in linux. In some microcontrollers I can access overrun and framing error flags programmatically. Is it possible to access these flags from command line?