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.

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8 views

Read AS3953 NFC EEPROM when the chip is not supplied

I want to read/write AS3953 (NFC chip) through SPI (MSP430) and PCD (Samsung Galaxy S3 Mini). No problem for the first part (through MSP430 SPI). but when I want to read EEPROM values trough PCD, I ...
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1answer
26 views

working of Relay switch for driving high voltage ac appliances

Explain the working of relay switch for driving high voltage ac appliances? also explain how it works in embedded system?
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25 views

Push-button PMIC & Battery Charger [on hold]

I am looking for an IC that combines Push-button power management with a Single cell LiPo charger (USB source). The IC should have a push-button input to turn the system ON, as well as a PB output ...
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0answers
25 views

Getting started with embedded [on hold]

First of all, I am not an Electrical Engineer and I have very very less knowledge about it. But I do practice a lot computer programming and can easily learn a new language. I am on my Summer ...
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2answers
83 views

Statistically, which embedded system is the most used in Cryptography/Security? [closed]

I am considering to buy an embedded system development platform (electronic board + software) for Cryptography and Computer Security. Statistically, which embedded system is the most used in ...
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40 views

STM32 wont boot

I have an STM32F407VG on my board. I am able to bring it to the dfu mode. Then I am able to flash it using DfuSe, which also correctly recognizes the dfu device ...
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2answers
94 views

ADC calibration in ATTiny88

I'm writing an embedded app for ATtiny88 - one of its task is to measure voltages of serial connected two 12 V car batteries. The microcontroller is powered from around 4.5-5 V (LM317), measured ...
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0answers
36 views

Reference Material for Embedded Image Processing System [closed]

I would like to create an embedded system that takes a Full HD photo by pressing a button, processes and compresses it(for ex. to jpg) and then sends it via Bluetooth to the smartphone - where it's ...
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1answer
30 views

Flash memory read and write

I'm always disabling interrupts while writing to some sectors on Flash, but does Flash memory requires disabled interrupts even when you just want to read from it? Why yes and why not? Thanks for the ...
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0answers
12 views

IAP Flash LPC1788

Can this line cause a problem when reading from Flash, because of casting to BYTE pointer instead of DWORD? What will happen, and what data will be read? pointer_podatak = (BYTE*) IAP_BASE; ...
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1answer
29 views

Writing to and reading data from Flash using IAP

Here you can see functions I'm using to store data into Flash, but I'm getting data erased after power reset, so it's still in RAM not in Flash. ...
7
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1answer
545 views

Are there any standard testing methods for bare metal code

I want to know if bare metal code, especially things like device/peripheral initialization code has any testing methods since there is little to nothing that can go wrong when writing to registers ...
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0answers
25 views

Difference between sectors used for Flash and IAP?

Here is a picture of sectors on on-chip 512kb Flash memory on LPC 1788, and the question is what's the difference between sectors 0 to 19 and 20 to 29. Can 0 to 19 be used in IAP or not and ...
2
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0answers
36 views

GSM/3G SoC reverse engineering for GSM/3G Layer1/2 PacketAnalyzer

I want to develop a GSM/3G Packet Analyzer for study purposes, a somewhat more simplified version of OsmocomBB but without any TX modules. As some of you may know, even though OsmocomBB is open ...
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1answer
38 views

Choosing a RJ45 to WIFI adapater for use with Embedded Server

I wanted to build the classic web page that turns on and off an L.E.D. My plan was to use one of the Atmega line of micro-controllers with an enc28j60, which seems to be a popular solution to this ...
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1answer
62 views

heating problem - L7805C [duplicate]

I'm using a L7805C voltage regulator , to power an SMPS circuit. But its getting heated after 10 min or so , even if I've put a heat sync. SMPS IC is used to convert +5V to -9V.
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3answers
65 views

Benefit of (logically/virtually) separate I/O and memory bus

In my course on embedded systems, it is explained that memory inputs can be separated from I/O inputs using a "mode bit" for the address decoder. The most obvious advantage of this is that the amount ...
1
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3answers
80 views

Function to determine data size [closed]

I am using eeprom emulator which writes a page of flash of 60 bytes at once. Data to be written to that page is first stored in a 60 byte buffer (array of 60 elements) in ram and then transferred to ...
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0answers
21 views

eMMC array partitioning vs general flash memories one

I have some questions about an eMMC datasheet and its relation with its JEDEC standard and flash memories principles that could never been answered in other posts I read here that write size should ...
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0answers
92 views

How to test RS485 communication via PC terminal?

I've tested RS232 communication via terminal with LPC1788 ARM CPU, and it works, now I want to test RS485. I just want to make simple echo program, what is sent, that is returned. Problem is that CTS ...
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1answer
138 views

intel realsense vs kinect v1 vs kinect v2? What is the best depth camera to be controlled on an embedded device? [closed]

What would be the best of these depth cameras to be used in an embedded application? i know all of them provide SDKs for high level programming in PCs, but for an embedded application i think i would ...
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0answers
49 views

How to program custom iNemo M1 board with STM32F4 Discovery and ST-Link Utility?

I have developed my own ST iNemo based board, and I'm trying to program it with the Discovery board. The iNemo board is connected to the VCC pin of the discovery for the power supply while ...
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4answers
707 views

Interrupt handling in microcontrollers and FSM example

Initial question I have a general question about the handling of interrupts in microcontrollers. I am using the MSP430, but I think the question may be extended to other uCs. I would like to know ...
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1answer
49 views

Watchdog Reset VS Power Cycle

I am working on a system with a microcontroller than controls other microcontrollers, mainly sending commands to the other micros. I built in a Watchdog Overflow function on the 8051, which ...
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0answers
46 views

Problem in communication between STM32F429 with Ethernet PHY

I have problem in communication between STM32F429 with Ethernet PHY. I have Emcraft SOM(system on module) board, STM32F429 and Micrel Ethernet PHY IC interfaced or connected on SOM Board. I have taken ...
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1answer
123 views

Can ARM MBED be legally and robustly used in commercial products?

I'm looking for a simple but reliable microcontroller platform (chip plus API) for modules that will be integrated in a product that we are developing for a customer (in this case a 8 channels RS232 ...
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3answers
58 views

what is sensible to debug msp430? [closed]

As you know, msp430 launchpads have their own debugger, nothing else required to debug,on the other hand fet-debuggers are sold in high prices on ti.com,what the hack is that? and if i buy only ...
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2answers
176 views

How to test if my program for SPI communication is working correctly?

I have developed a simple code for learning about SPI in Arduino Due. The code is compiling properly and now I would like to learn the next step on how to test the code with the board and get the ...
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0answers
73 views

Logic Analyzer doesnt work in Keil uVision 5 with STM32F4 discovery

Logic Analyzer doesnt work in Keil with STM32F4 discovery (STM32F407VG). I am using uVision 5. All my drivers are up to date. The code gets compiled without any errors, however, I cant get the Logic ...
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2answers
37 views

Intel bga 1170 pinout

I have been researching this question: What is the pinout for an intel celeron N2930 soc? But I cannot find it in the datasheet, or on google. Thanks
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1answer
47 views

Multiple DTMF circuits able to detect the pressed keys but fails to read caller's number!

This is a follow-up question of "Multiple DTMF circuit interfaced to one microcontroller, will it work? Multiple DTMF circuit interfaced to one microcontroller, will it work? I used the ...
2
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1answer
34 views

Clock switching hangs when switching back to original source

MIGRATED TO EE.SE http://electronics.stackexchange.com/q/159634/69868 I am currently working on a project where the clock needs switching between the Primary Oscillator with PLL (POSCPLL) to the FRC ...
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0answers
57 views

Reverse-engineering VGA

I got a x86-based firewall, produced by Stonesoft. It has serial interface, but it would be easier to install new operating system if I would get VGA output from the device. I discovered promising ...
5
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2answers
166 views

Is it worth it to go full stack as an embedded engineer? [closed]

In big companies, they tend to separate embedded engineers by disciplines such as firmware, hardware, interface software, and PCB layout. Still, I think it's more fun to work 'full stack' and build ...
2
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3answers
69 views

Courses about deploying Linux on embedded systems

I am a new grad student in EE and am trying to take full advantage of my time here at the uni. I have always wanted to understand how to get Linux running on embedded platforms, but from the outside ...
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3answers
72 views

Could I use a surface mount thermistor to measure ambient temperature?

I'm working on a project where a device I'm using has this thermistor, a Murata NCP15WF104F03RC, to measure the temperature of the device itself. This is a surface mount thermistor. The implementation ...
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0answers
36 views

Establishment of a2dp bluetooth connection

I have a problem with establishment A2DP sink Bluetooth connection. I have Allwinner A13 development board and Realtek RTL8723AU Wifi-bluetooth module with installed Linux kernel 3.4.103, bluez 5.28, ...
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0answers
38 views

Can Fez Panda II run C/C++ without RLP?

For a project I'm working on, I need to program a Fez Panda 2 to run on C or C++ in order to gain the necessary speed of reading data. However, I have been told to 'ignore RLP' as the program needs ...
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1answer
64 views

Synchronized digital cameras

at the moment im doing some research. I want to create an embedded "application" with two digital cameras ( > 30fps, global shutter, >= 800x600 resolution ) on an Freescale Arm iMx. 6 Quad (i think ...
2
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2answers
408 views

Fesibility of using “computer RAM” with a microcontroller project

How feasible is it that I could connect the pins of some garden variety "computer RAM" to a microcontroller for use as external RAM? Is there specific hardware used on computer motherboards that help ...
0
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1answer
40 views

Memory addressing in eMMCs

I'm working for the first time on eMMCs and there's something not completely clear to me in their addressing system [explained in section 5.2 of JEDEC 5.0 standard] JEDEC says that, depending on the ...
0
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1answer
59 views

PCB software and companies that make [closed]

I am looking for a free software tool to make PCB for my circuit and submit it to a company to make it. My circuit components include surface mount devices and antennas. Any suggestions.
1
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1answer
125 views

Atmel printf formatting doesn't work, no formatting does work

We are running an Atmel AVR32 chip on our board, and recently discovered that printf with format/conversion specifiers doesn't work. A regular ...
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1answer
31 views

baudrate calculation from frame timings

I'm working to interface with an old serial protocol. All I have actually is the frame format and various timings. I need the baudrate to sync correctly and use the data properly. My frame is 15 ...
0
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0answers
79 views

XMega ADC is not working

I am working with ATXMega32D4 and trying to run a ADC Code. The output of the ADC is always pushing the maximum value, incase of a 8bit resolution unsigned mode, the output value is 255. The same ...
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0answers
66 views

USB to RS485 converter: Auto enable control

I have been trying to program infineon mcu via usb to rs485 converter. Procedure to check mcu is working fine: Query command sent using hercules : 0x80 Response sent by mcu : 0x55 (correct response) ...
1
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1answer
104 views

hlk-m30 WebClient example

I have started working on HLK-m30 WiFi module. I am developing the simple client on the module using simple AT commands. I have Opened socket TCP client and then Write data using the command. ...
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0answers
860 views

BCD to 7 segment display in verilog

I am trying to implement a BCD to seven segment display in verilog using modelsim as a simulator. When I am doing so I am getting this as my output: But when I am forcing the values I am getting the ...
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2answers
139 views

LCD interfacing with msp430

I am making a contact less tachometer based on magnets .I am using msp430g2253 micro controller and HD44780 lcd. I have done certain calculations for calculating rpm in the main code and now i want ...
0
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2answers
130 views

Why does the Intel Atom processor need so much thermal dissipation compared to similar ARM processors

When looking at cases designed around the Intel NUC Atom-based board it seems they put a lot of effort into thermal dissipation (i.e. the entire case is basically a big heatsink). Of course, these ...