Electronics Questions not on EE
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7 answers

arduino ADK + android LED blink example compiling errors

I'm trying to make a project using the arduino ADK board http://arduino.cc/en/Main/ArduinoBoardADK and a Sony Ericsson Xperia Play running android 2.3.4. For starters all I want to do is blink a led ...

7 answers | 21 mins ago by Marcel Căşvan on Stack Overflow stackoverflow.com
0 answers

Read ADC (Beaglebone Black) without closing File Descriptor

Is it possible to read the ADC of a Beaglebone Black or another embedded-linux system without closing the File descriptor? I tried it with a select before read(). select() returns 1, but read() ...

2 answers

How to define a primitive device in Proteus?

I'm trying to make my own full adder and some other devices as a sub-circuit in "Proteus" and use them several times in a bigger circuit. The problem is when you copy a sub-circuit you need to rename ...

2 answers | 27 mins ago by AmirAhmad on Stack Overflow stackoverflow.com
0 answers

How to import a big project to xilinx SDK and generate .elf?

I'm very new to zedboard. I have a big project, which has several hierarchical makefiles. I want to import the project into xilinx SDK, build it, and generate the elf file, and load it to Zedboard ...

1 answer

Qt for arm architecture

I simply want to install qt on odroid device (O.S - ubuntu, architecture - armv7). All my searches point to cross compiling qt. Isn't there simple solution? I mean why there isn't any link to download ...

1 answers | 54 mins ago by Mher Didaryan on Stack Overflow stackoverflow.com
0 answers

Problems using and LDR to play Audio from SD card

I've hit a bit of a roadblock with my project. I've tried for hours and can't seem to find out what is causing my problem. I'm trying to create a box that, when it's closed I can use bluetooth ...

0 answers

ESP8266 wifi module to read PHP file

Seeking advice on getting the arduino and the ESP8266 wifi module to read a PHP file on a web page (not LAN; i am using a domain name and hosting service for the webpage) that echoes '1' or '0'. If it ...

2 answers

ublox NEO 6m: UBX command sanity check (with Fletcher checksum!)

So I've been banging my head against my keyboard for a few days because I can't figure out how to get my new GPS shield to play nicely with my Teensy 3.1 (Arduino compatible) microcontroller. The GPS ...

1 answer

makefile search device, avrdude

I want to program my AVR ATmega644. Therefore I have two programmers. For compiling and programming I using a Makefile, so I only need to type in make or make prog in a command window and the whole ...

1 answers | 2 hours ago by paul_schaefer on Stack Overflow stackoverflow.com
0 answers

Arduino Begineer volume up down control by push buttons code

I have to control a digital potentiometer from a microcontroller. The microcontroller will be used to set the “value” of the digital potentiometer (variable resistor) based on digital ...

2 hours ago by Alan on Stack Overflow stackoverflow.com
0 answers

Linux how to locate source code that cause unknown signal 50

Running on ARM architecture, We defined SIGMAG as 50 and registed it in function "OsMsrOpen". In my program I called "OsMsrOpen"(The function to open the swipe magcard feature in POS terminal), and ...

1 answer

What's an efficient way to round a signed single precision float to the nearest integer?

float input = whatever; long output = (long)(0.5f + input); This is inefficient for my application on an MSP430, using the compiler-supplied floating point addition support library. I'm musing that ...

0 answers

Trying to redirect users to PHP page when they click on an embedded Vimeo video on Facebook

I'm trying to post a video hosted on Vimeo on my Facebook wall, but have the users redirected to a self hosted php webpage first. In that php webpage I send an email to myself to notify that someone ...

0 answers

Arduino WebClient not responding

I have been trying for about a week, looking through all of the stackoverflow posts and have yet to come to a solution. I have a .php file in a xampp server: <?PHP echo "<html> ...

0 answers

gcc; Aarch64; Armv8; enable crypto; -mcpu=cortex-a53+crypto

I am trying to optimize an Arm processor (Corte-A53) with an Armv8 architecture for crypto purposes. The problem is that however the compiler accepts -mcpu=cortex-a53+crypto etc it doesn't change ...

0 answers

why arm-none-eabi compiler generate main symbol which is not declared in source

I'm trying to debug an embedded program on ARM processor using gdb debugger (arm-non-eabi-gdb) and openocd. I installed “GNU ARM C++ OpenOCD Debugging plugin on eclipse. it's completely bare metal ...

1 answer

Are there General Purpose Boot Registers (GPBR) on a i.MX6 platform?

I've been using GPBRs on an Atmel AT91SAM9G45 platform for counting reboots within the bootloader. I would like to do the same on a i.MX6 platform based project, but I can't find any references to the ...

1 answers | 4 hours ago by Chris on Stack Overflow stackoverflow.com
1 answer

Using TI Linker Command File with Clang

When using TI (Texas Instrument) compiler, I am able to set a memory location of embedded micro-controller using C++ by simply ADC12IFG = 50;. Clang marks this code as error: indirection requires ...

1 answers | 4 hours ago by user1135541 on Stack Overflow stackoverflow.com
0 answers

Specifying input to putty terminal in command line

I am trying to control a LED(ON and OFF) using arduino board through my windows 8 laptop via Bluetooth module(hc-05) using Putty Terminal. But i don't want to give input to putty terminal manually ...

1 answer

Is there a ready solution for embedded c to use external string resource on serial flash?

I'm working on an SoC with 128K RAM, and currently the UART printing is too much so we have to reduce the code size by drawing it from memory. We've got an working 128Mb SPI serial FLASH on board, ...

1 answers | 7 hours ago by Ethansong on Stack Overflow stackoverflow.com
1 answer

Bizare class instantation in adafruit example

I can't figure out the benefit to initializing a class instance with this syntax Adafruit_8x8matrix matrix = Adafruit_8x8matrix();, when Adafruit_8x8matrix matrix; will do. Is there any kind of ...

1 answers | 8 hours ago by HSchmale on Stack Overflow stackoverflow.com
1 answer

Code sequences for TLS on ARM

The ELF Handling For Thread-Local Storage document gives assembly sequences for the various models (local exec/initial exec/general dynamic) for various architectures. But not ARM -- is there anywhere ...

4 answers

What's a good strategy for adjusting pole pieces?

One thing I fiddled with for a short bit once upon a time is adjusting the pole pieces on my Humbucker/P-90 equipped guitars. As a matter of fact, doing just that was the only way I could get my P-90 ...

4 answers | 9 hours ago by Jduv on Music: Practice & Theory music.stackexchange.com
1 answer

Determine FLOPS of our ASM program

We had to implement an ASM program for multiplying sparse matrices in the coordinate scheme format (COOS) as well as in the compressed row format (CSR). Now that we have implemented all these ...

1 answers | 10 hours ago by tom1991te on Stack Overflow stackoverflow.com
1 answer

Why can't Qt initialize the display on my new hardware

I don't expect anyone to have a solution to my specific problem, but I'm hoping an answer might lead me in the right direction. I have a Qt5.2 application compiled and working on my TI AM335x ...

1 answers | 11 hours ago by Mike on Stack Overflow stackoverflow.com
1 answer

Code to run Attiny85 with WS2812 integrated with RGB LED

I am trying to work with this chip: https://www.adafruit.com/products/1655? ... fgodFpsAow + a Attiny85 The code I am using is below, it works fine with an Arduino but not with the Attiny85 (just ...

1 answers | 11 hours ago by dstung on Stack Overflow stackoverflow.com
1 answer

Arduino: When pressing a button return only one output

I'm trying to make a fruit piano with my Arduino and right now I'm just using paint on paper. Still when I press the button I get multiple output of lines. How can I fix that. Here's a video of what ...

1 answer

get query id on click in esp8266 arduino

can someone kindly tell me how to get query id on click using the module chip and not wifishield? At this point, I just need someone to point me to the right direction (after days of searching), what ...

1 answers | 13 hours ago by JamAndJammies on Stack Overflow stackoverflow.com
5 answers

Faster 16bit multiplication algorithm for 8-bit MCU

I'm searching for an algorithm to multiply two integer numbers that is better than the one below. Do you have a good idea about that? (The MCU - AT Tiny 84/85 or similar - where this code runs has no ...

2 answers

What does a parallel port on an embedded system look like?

this may be a stupid question but it's been confusing me. I've been watching some videos on Embedded Systems and they're talking about parallel ports, the data, the direction and the amount used. I ...

2 answers | 14 hours ago by JamesDonnelly on Stack Overflow stackoverflow.com
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