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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Average current from a 4V lead acid battery

I am using three 4V rechargeable lead acid batteries in series as a power source for an embedded system. The logic system taps out 8V which is fed into an LM7805 and the 12V is used as input to an ...
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1answer
96 views

Embedded systems C/C++ [on hold]

What are areas of C and C++ programming languages an embedded system engineer need to know the best? I know that not all the areas of these languages are used in embedded systems, so which are the ...
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1answer
46 views

Software vs Hardware control

I was reading the Tivaware datasheet on GPIO: http://www.ti.com/lit/ug/spmu298a/spmu298a.pdf When I came across this(page 257): "where GPIO_DIR_MODE_IN specifies that the pin is programmed as a ...
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1answer
21 views

DATA_ALIGN Pragma - Tiva

What is the purpose of a pragma Data_Align in TI emb. compiler. The datasheet explanation: http://www.ti.com/lit/ug/spnu151j/spnu151j.pdf "The DATA_ALIGN pragma aligns the symbol in C, or the next ...
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1answer
33 views

What are LCD Display Drivers & LCD Display Controllers? What are their applications?

I have used graphic and alphanumeric LCDs. I have come across LCD Display Drivers & LCD Display Controllers ICs. When are they needed and what do they do?
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1answer
38 views

Programming cc2530 on Linux

I am trying to program a cc2530 mcu, all the example software and libraries are provided for IAR, but since I am on ubuntu, I am unable to use it, I have installed sdcc but I am still unclear as to ...
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33 views

BeagleBone Timer Trigger

Is it possible to lower timer constant which is 1 ms to microseconds? For example i want my LED to be ON for 15500 microseconds and off for 500 microseconds? ...
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0answers
37 views

Using a radio board with Contiki-OS on lpc1347 mcu

I am trying to build a port for Contiki on my lpc1347 board. So far I have been able to run a basic LED blinking/Hello_World Contiki process/program on my board. My next goal is to use a cc2530 radio ...
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1answer
58 views

Can i use MOSI/MISO pins from this schematic

Can i use MOSI/MISO pins from ATMEGA328 to use for ICSP programmers. I am already using clk and data as inputs to control my 7-segments. I want to use the icsp but i already used the miso/mosi pins ...
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2answers
63 views

embedded programming flashing program

Hello All, I'm new to this board and looking for some opinions. I've searched the board a bit and found similar questions but not quite what I'm looking for. I'm looking for some help deciding on an ...
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0answers
57 views

When C++ replaces C? [duplicate]

In which cases is C++ necessary when we are programming microcontrollers, what are the situations when C++ replaces C language? Just give some examples. I'm asking this because I want to start ...
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3answers
110 views

White noise generator for audio jamming ( from 250 Hz to 4.5 KHz )

I want to implement a white noise generator device for the purpose of audio recording jamming , as I can make the recorder record the noise and the speech together so any one try to record the ...
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1answer
23 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
33 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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2answers
120 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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53 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
110 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
39 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
40 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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13 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
45 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. ...
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1answer
554 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
30 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 ...
3
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1answer
71 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
47 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
66 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
70 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 ...
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3answers
85 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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27 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
159 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
288 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
77 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
746 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
57 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
57 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 ...
4
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1answer
139 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
63 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
369 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 ...
0
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1answer
135 views

Problem with update to Keil uVision 5 with STM32F4 discovery

My dev system 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
48 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
55 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
44 views

Clock switching hangs when switching back to original source

I am currently working on a project where the clock needs switching between the Primary Oscillator with PLL (POSCPLL) to the FRC and back again. I have initialised the Clock as the PRIPLL by using ...
2
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0answers
70 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 ...
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2answers
186 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
76 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
78 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
43 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
43 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
70 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 ...
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2answers
427 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 ...