An embedded system is a computer system designed to perform one or a few dedicated functions often with real-time computing constraints. It is embedded as part of a complete device often including hardware and mechanical parts.
4
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2answers
60 views
Pulling power off a battery stack at different voltages
If I'm powering a device with a series-connected stack of rechargeable batteries, can I pull different voltages at different points and route them to different components? I need to run a 12V ...
0
votes
1answer
49 views
Beginner resources device design/assembly [closed]
During the summer I would love to get into electrical engineering. As background, I'm a computer scientist and as such, I have a fairly decent grasp of basic circuit design and electricity, which ...
0
votes
1answer
52 views
Microcontroller with embedded radio and wake on radio
I am looking for a microcontroller that has radio and WOR (wake on radio) feature all in one...basically a system on chip solution with low power consumption.
I was checking suppliers like TI etc... ...
-2
votes
1answer
35 views
scope of embedded systems for electrical engineers [closed]
I am an electrical engineering student and have just completed my second year. Do I need to do a course of embedded systems to enhance my qualifications?
Does an embedded systems course hold a ...
5
votes
1answer
73 views
Examples of DRM on embedded systems
I'm tasked with implementing a DRM on an embedded system. The device would have a limited number of times which it can run, after which it would be disabled, until it syncs with a computer with an ...
1
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1answer
78 views
Sending command using USART
I am new to this kind of communication. I am able to send command from PC to AT90USB1287 microcontroller as well as able to get response using USB communication. Now i have connected another ...
0
votes
1answer
43 views
MSP430: How to set a gpio as output HIGH at same instant it is set as output in DIR register?
In our design, pin 4.7 of msp430 is connected to the KILL pin of the ON/OFF switch IC which is active LOW. So when ever I set the pin 4.7 as output in DIR register, the whole circuit turns OFF even ...
5
votes
6answers
269 views
Why do people create web server on a microcontroller?
I have come across people creating web servers using microcontrollers, why would someone do that? What are its applications? What skill set besides C language does one need in order to create such ...
-3
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0answers
41 views
Looking for an ADSL capable logic unit! [closed]
I'm looking for a product I can buy.
It must be a programmable RTU or PLC (both IEC 61131 Logic Engine) or a microcontroler (Oracle JRE).
It should be in a package which has ADSL connectivity and ...
-1
votes
1answer
49 views
Easiest & cheapest way to use embedded filesystem on SD card [closed]
I want to build a cheap, basic project which logs data to an SD card that can be removed and read using a normal card reader in a computer.
Requirements are fairly basic so performance is not ...
3
votes
0answers
71 views
Flow diagrams for embedded applications
I have embedded application which uses interrupts and dma. The main loop only sends data to PC.
How to design flow diagram of program? How to show interrupts and dma working on flow diagram?
I've ...
3
votes
1answer
59 views
what is an avr programmer for arduino?
I'm a beginner with Arduino . I'm reading a book called practical avr microcontrollers. Games gadgets in home automation with the microcontroller used in the arduino
From the beginning the book ...
6
votes
1answer
154 views
Solution for detecting a magnetic field
I have an Arduino based circuit that performs a mechanical job and I'd like the circuit to turn on when it detects a magnetic field. I want to use a magnet as a trigger for the circuit. When a magnet ...
3
votes
1answer
43 views
Storage in embedded linux
I am basically from a background of small microcontrollers(arm7,cortex-m series). As I started working with a cortex a8 board(beagleboard xm), I always wonder how to store applications in flash/ram ...
0
votes
1answer
73 views
Help required performing Single Master - Multiple(upto 16) Slave SPI Communication using MSP430
I am planning to use MSP430F6638 for SPI Communication between a single MSP430 Master and multiple MSP430 Slaves. I am using a 4x16 Multiplexer before each Slave for providing the Chip Select Signal. ...
-4
votes
0answers
82 views
Microcontroller selection [closed]
I am looking forward to your suggestions to find a cheap and best micro controller which is around $1-$2 for bulk volumes with following bare minimum features i)GPIO - 30 pin ii)ADC -( minimum 8-10 ...
3
votes
1answer
199 views
Working with FTDI library for accessing FPGA memory
I asked a related question here.
The board is Lattice MACHX02 1200 ZE.
I am using FTDI Library FTCSPI to access Lattice FPGA UFM through FTDI chip FT2232H. I configured the FPGA in SPI slave by using ...
6
votes
1answer
300 views
Microcontrollers with extreme high temperature range
I am looking for components which works at high temperature. Especially I am looking for microcontrollers which works at 180 °C to 200 °C. I am designing downhole electronics for oil and gas ...
0
votes
1answer
65 views
ARM Linux and UBoot - Can I make a read-only MTD writable?
I have several embedded Linux devices installed at customer sites. We have an updated Linux kernel we are prepared to deploy to these devices. The problem is that on these devices, the U-Boot ...
0
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0answers
28 views
Habing trouble booting code on an embedded SoC
I recently bought a freescale i.mx233 based OLinuXino-MICRO board to mess around with and give me some more power than the AVR uC's I've been doing abit with lately. However I'm having trouble getting ...
0
votes
0answers
50 views
Embedded project using Mux and Demux for antenna
In our current embedded project we are implementing a GPS ,GSM and Wifi Module. To connect these modules to external antenna board,separate SMA cables are used.As our design requires each of the ...
2
votes
2answers
150 views
ExternalDifferential ADC Values for PIC
I have a temperature sensor design that I'm using as a reference. It takes 2 RTD sensors and reads their values with a Dual Channel 16-bit Differential ADC. The ADC interfaces through the SPI bus.
...
1
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2answers
74 views
Embedded system with SMA connectors
I am developing an embedded system that performs GPS and Wifi operation with separate modules for each and two SMA connectors to connect the respective antennas. Once it is being installed, is there a ...
-1
votes
1answer
84 views
what type of electronics job would combine mathematics, electronic design and programming into one [closed]
There are quite a few different areas of jobs in the Electronics industry.
We have Analogue, Digital, Embedded, Telecommunications, Control and much more. What I wish to know is that what job would ...
1
vote
2answers
145 views
STM32 ARM header files for use with Eclipse and GCC
I'm a mechatronics (mechanical and electrical) engineering student and want to learn how to program ARM microprocessors. I've used Atmel ATMegas previously. I'm using a mac and being a student I ...
0
votes
1answer
47 views
Difference between best/worse-case latency
I am doing performance optimization of an inverse 8x8 Type-II DCT transform code using Xilinx Vivado HLS. I have generated the report but am unsure of the difference between the best-case latency and ...
0
votes
0answers
50 views
IBIS model simulation with spice model
I am designing a Data acquisition system with a Texas instruments ADC, Inamps and a ST micro electronics micro controller. I am getting spice models for my inamps, differential amplifiers etc. so that ...
-3
votes
2answers
101 views
where to begin learning PC board designing [closed]
can someone please guide the correct path to learn board designing for computers. being specific i am just keen to design a SBC(single board computer) just for hobby purposes my current knowledge is ...
2
votes
2answers
219 views
Can I generate 56kHz signal with MCU running at 1Mhz
I am new to embedded systems designing. I have to generate a 56kHz signal with a MCU running at 1Mhz. I want high accuracy. If I just use a timer, it gives me 55.55kHz.
Is there any way I can divide ...
1
vote
0answers
89 views
How to get rid of “Invalid opcode 0x002A at PC=0x004” in ISIS Proteus?
I have used ATmega 8 and have simulated a circuit to use interrupts, when i give an external interrupt i.e. when a push button is pressed all the LEDs connected to PORTB supposed to be lit up, but i ...
0
votes
2answers
128 views
What Happens when Read or Write Failures Occur on SD Card?
I have been happily backing up and copying SD (including microSD and SDHC) cards from a Linux PC using the following commands:
...
1
vote
2answers
79 views
Function called in ISR and Overlay Directive -Keil / 8051 core
My C code has an ISR, where a decision has to be made to execute a particular function "A". Now I know that its not good to run a function in an ISR. But in this case of my application, I do not see ...
2
votes
2answers
80 views
Communication between embdedded system and Mobile phone
I am software developer and new to the embedded systems.
I need to use a wireless communication method to send/receive data from embedded system and a mobile smart phone (Android - iPhone).
My target ...
0
votes
0answers
46 views
Can you help me find a suitable MIPS eval board
I'm a ARM guy but recent events have me needing to port some of our code base to a MIPS device and profile it. Mainly concerned with processor utilization.
The device target I'm looking for is a ...
2
votes
1answer
60 views
Embedded board level functional test at factory
My embedded project has a GSM and a GPS module. What is the best way to test the radios of these modules after the production of CCA like in a factory conditions.I was thinking of signal generators ...
-1
votes
1answer
66 views
Camera component for taking still images? [closed]
I am working with some friends on a project that needs to have an camera that takes photos, but we are needing to source just the sensor, with built in lens. One such solution I found was:
...
0
votes
2answers
158 views
RS 232 serial sniffing
We have a task in hand to sniff a RS232 protocol in a certain industrial automation setting(we have been asked to do this legally by the manufacturing company itself). We are planning to send a ...
6
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5answers
224 views
Programs resistant to hardware issues
I recall at one point reading about embedded development where the programmer took into account things like memory corruption and possibly other hardware issues. For example:
If an instruction in ...
0
votes
0answers
73 views
hardware platform with only ethernet and power [closed]
I'm new to embedded systems, I am a software engineer. I'm looking to make a small ethernet based server. Just needs ethernet and power, if it has more I will need a case which obscures the other ...
0
votes
1answer
90 views
Writing a method using MIPS code
I am trying to understand how convert C code to MIPS code and I have having trouble understanding why the stack pointer( $sp ) needs to be manipulated before and after the procedural code.Isn't the ...
1
vote
1answer
387 views
STM32F4 Discovery demonstation not working anymore
I purchased a STM32F4 Discovery quite recently, and when I initially unboxed the board, I hooked it up to my Mac, and the already programmed in demonstration was working 100%. I was able to view the ...
1
vote
1answer
161 views
Embedded system engineer's guide to GUI [closed]
For an engineer who solely knows C/C++ for programming microcontrollers, and has no idea about developing fancy GUI application for communication with his embedded systems, Which book and IDE might be ...
2
votes
0answers
101 views
JTAG Programming with LPC4330
Because the Example Virtual Serial Device project from NXPUSBLib contains a space in it's directory structure (specifically Example_VirtualSerialDevice/LPC43xx M4/...) I can not successfully download ...
5
votes
5answers
165 views
How to determinate a reasonable clock frequency for a MCU?
Currently my datalogger is running at 12Mhz, and sleeps 90% of the time. When it's active its mostly blocked by I/O like SD-card or UART.
I suspect the system would still work at 6 Mhz, but how do ...
1
vote
3answers
130 views
Microcontroller hanging during serial communication
I was working on a project in which microcontroller is communicating serially with computer.
Initially it works properly but after some duration (i.e 2-3 hours) microcontroller get hanged.
I think ...
5
votes
9answers
420 views
Microprocessors/Microcontrollers - Do registers have addresses?
My Embedded Systems professor keeps referring to the memory locations of registers as their respective "addresses". I'm confused by this; I was always under the impression that in any microprocessor, ...
0
votes
3answers
173 views
sEMG with ADS1299 from TI
What else besides an ADS1299 from TI and a 32bit microcontroller (like Teensy or Electric Imp) would I need to get an sEMG signal?
The ADS1299 is a "low-noise, 8-Channel, 24-Bit analog front-end for ...
2
votes
2answers
143 views
Searching for a Micro controller with a battery capability
I am working on a low power design, which will have a MCU powered by my regulated DC power supply from mains(220VAC). But when the Mains fail, I intend to have a battery connected to the chip that ...
1
vote
1answer
187 views
ARM + FPGA board for industrial Product development [closed]
I am using mini2440 board with external FPGA board, I am looking for one ARM+FPGA board with GPIO support.
As of now I am using mini2440 board with GPIO to control the hardware and sometimes using ...
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votes
2answers
108 views
Designing FIR filters [closed]
How can we realize a second order digital FIR filter without using a microcontroller. What assumptions would be taken?
