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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Function to determine data size [on hold]

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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9 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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47 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
50 views

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

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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15 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 ...
7
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4answers
627 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
40 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
22 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
109 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
55 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
85 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
38 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
29 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
38 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 ...
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1answer
30 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
50 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
149 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 ...
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3answers
65 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
62 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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30 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
30 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
55 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
393 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 ...
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1answer
37 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 ...
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1answer
58 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.
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1answer
115 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
28 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 ...
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59 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
55 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) ...
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1answer
76 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
370 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
112 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 ...
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2answers
116 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 ...
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3answers
82 views

Integrating code for embedded systems [closed]

I wonder how looks integrating code for embdedded systems. Lets suppose there are 5 programmers and everyone is doing something different. Then I am supposed to integrate the code. How do I know if it ...
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0answers
164 views

CAN bus on STM32F429 receiving messages

I am using the STM32F429 HAL CUBE for a CAN bus implementaion. I am able to transmit some CAN bus messages, but my receive function is not working. Is it compulsory for receiving messages to write a ...
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0answers
69 views

ARM JTAG Debugging Internals

I want to learn how JTAG is interacting with ARM core more in detail. All explanations I have found so far are very basic and just cover JTAG tap controller with a simple state machine diagram. I ...
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1answer
46 views

lwIP webserver download

I'm using a STM32F4 with lwIP to host a website, and I also have an SD card which I save csv type files to using FatFS. Just wondering how I would allow users to download files directly from the SD ...
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2answers
79 views

How is data allocated in an assembly language using the instruction set?

Consider the following excerpt of assembly code written for the Nios II embedded processor architecture: ...
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0answers
46 views

AUTOSAR OS configuration example

As with version 3.0, AUTOSAR switched from OSEK-OIL to a XML based format in order to configure their OS. I'm looking now for an example of how this configuration can look like. The AUTOSAR ...
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1answer
110 views

lwIP - Best way to send data from microcontroller

Currently, I am using Server Side Includes to transfer data from my microcontroller to my webpage. The issue with this approach is that if I want to graph the data I have to store the SSI value in a ...
0
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1answer
107 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 ...
3
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2answers
93 views

CANUSB SJA1000 Filtering

I am using a CANUSB adapter connected to my car attempting to read out only CAN messages with 11-bit identifier 0x1D6. I need to do hardware filtering because software filtering is too slow for my ...
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2answers
70 views

Simulated Annealing Algorithm [closed]

What is the the Simulated Annealing Algorithm used for placement in FPGAs, complete description and in simple words.
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2answers
129 views

RTOS: Why Do We Need Special Post versions for ISRs?

In some RT kernels, if you want to post to a semaphore or flag from an ISR, you need to call an special version of the method, instead of the regular one called from a normal task. Examples: ...
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1answer
68 views

Anticipating processing delay in embedded systems

Background: I have been working with the STM32F3 discovery board and I am trying to implement some signal processing algorithms from the ground up. My problem is shown below in the graph. The more ...
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2answers
174 views

Using 10 bit ADC for only 8 bits on a PIC MCU

I have a PIC16f1824, which has a 10bit built-in ADC, but I only want 8 bit precision. I don't just want an 8 bit value, but actual 8 bit conversion i.e. higher samples per second at the cost of bits. ...
4
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1answer
86 views

How long/big is an I2C acknowledge?

I'd like to know, how long/big should be an ACK from a slave to its master? I am communicating with a module using the I2C protocol. But the large blank space in the middle, is this an ACK from the ...
14
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6answers
2k views

For embedded code, why should I use “uint_t” types instead of “unsigned int”?

I am writing an application in c for an STM32F105, using gcc. In the past (with simpler projects), I have always defined variables as char, ...
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1answer
45 views

Handling variable length commands with pauses in transmission

I have my embedded system and I send many different commands to it using PC via RS232. The issue is that each of command consists of different amount of bytes. What is more there is possibility that ...
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1answer
127 views

Compiling C++ on EFM32 microcontrollers

I would like to use some high-level libraries written in C++ for my EFM32 microcontroller. Unfortunately the Simplicity Studio IDE for the EFM32 does not seem to support C++. I am a bit confused ...