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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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1answer
35 views

How can I deploy linux/android image on specific embedded hardware? [on hold]

I am trying to build a Cortex-A53 embedded computer recently. But for the specific hardware design I have, which is definitely different with other's design in peripherals and port connections, how ...
-2
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0answers
17 views

How to merge two arxml files? [on hold]

Is there way to copy certain frames from one arxml to another? Any tool available in market ?
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0answers
31 views

Embedded Linux Custom Boot Sequence

I’m working on a custom boot sequence for my Arria 10 SoC Demo Board. Rbf files and U-Boot should be in QSPI Flash, and Linux Kernel and RootFS are in SDMMC. I have no idea how to reach MMC memory ...
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1answer
38 views

What is the procedure for going from discovery board to a deployable solution?

Just to clarify with some context: This voice based keyword detection requires an mbed discovery board; and I am sure some min flash size. Even for a hobby project, i.e. personal home automation, ...
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votes
1answer
49 views

SysTick Timer in ARM arch - Mazidi book part

In mazidi book ARM arch. , using the sysTick Counter... i read this part Program 5-1 loads the initial value to the maximum and dumps the current value of the SysTick on LEDs of PORTF as it ...
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votes
2answers
64 views

In-system programming of the SPI Flash chip [closed]

Device have Serial NOR Flash chip MX25L6406E located on the rear of the PCB (SO-8/SOIC-8 Package). Is it possible to program chip without desoldering it? (In-system programming). As I know, it depends ...
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votes
1answer
14 views

Connect three HC-05 Masters to three HC-05 slaves

I have 3 Bluetooth modules HC-05 connected to my laptop using an USB-TTL interface and 3 microcontrollers each one has its own HC-05 slave. These devices shall send values to my laptop (each slave ...
1
vote
3answers
103 views

What is the best way to step my signal from 5V to 3V3? [duplicate]

I have some analogue signals between 0 and 5 Volts being fed from a multiplexer into another board that only accepts signals up to 3v3. What is the best way to step down the voltage? The signal ...
1
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1answer
162 views

Relation between Mbits/s and MHz

I am trying to communicate with an ADC via SPI. In the datasheet, It is mentioned, that: The performance of the ADC161S626 is ensured over temperature at clock rates of 1 MHz to 5 MHz – DNL +0.8 /...
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votes
1answer
73 views

Calculate voltage of a 16-bit differential ADC that gives a two's complement value

I am working with a 16-bit differential ADC and I would like to know the difference between this latter and a single ended ADC especially: How to calculate voltage from the ADC value ? Is it like ...
-3
votes
1answer
91 views

need c program for 5 minutes timer [closed]

i am building a project for a cycling bath in which the motor goes up and down. the micrlimit switch senses up & down position. once switch is activated motor cuts off and timer starts. after 5 ...
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votes
0answers
39 views

SPI communication between STM32L4 and ADC161S626 [closed]

According to the datasheet, the communication between Master board (STM32 in my case) and ADC161S626 is a 3-wire communication (MISO, SCK and CS) I used two approaches to communicate with the device, ...
1
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0answers
54 views

Suggestions for a thin contact sensor to check if there is contact between two surfaces

I am doing a little experiment with my bagpack, making it into a smart bag by adding a contact sensor to pockets such that is any item is inserted the contact between surfaces break and vice versa. I ...
1
vote
0answers
133 views

Can anyone help me get this running? (ILI9806E TFT on a teensy 3.5)

I am at one of those points where I just can't seem to see the forest for the trees. My previous experience with TFTs has been pretty much 'plug and play' using adafruit's breakout board kit and ...
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0answers
28 views

GTX1050 DP to LCD eDP

i have tried to connect my GTX1050 to the flat LCD panel: Short brief what I have: GTX1050 with DisplayPort Out LCD N173HHE-G32 with 40 pin eDP in DisplayPort Cable eDP 40 pin cable and now what I ...
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0answers
22 views

Confusion in walking 1s test on data and address lines of DDR3 to figure out address/data line shorted/open connection

We have beaglebone black based custom board with 256MB DDR3 RAM and 4GB eMMC. We are having two different kinds of DDR3 for our boards. MT41K128M16JT - 16 Meg x 16 x 8 banks : Size 256MB MT41K256M16 –...
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votes
4answers
683 views

C struct v union in embedded programming - why? [closed]

Is there anything that a union can do that a struct cannot? I know that one might use a union to save memory space, but these days it hardly matters.
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0answers
60 views

Physical impact sensor for detecting mail dropped in letterbox

I would like to attach a sensor to the bottom of my letterbox so that when a parcel or a letter is dropped in it I would receive instant notification. Ideally the sensor would be able to be configured ...
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0answers
20 views

Can't read from HID device STM32f042

I am setting up a custom HID device on the STM3240f2. I've been mostly following the CustomHID example from STM. My Report Descriptor looks like this: ...
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0answers
62 views

How do I get started with my LCD display? (ILI9806E driver chip)

I recently acquired a new LCD display from a chinese firm that I would like to use in my project, however I have no idea where to begin with interfacing this with the rest of my system. I've created ...
1
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0answers
20 views

Write to File in Computer running IAR Workbench

I am currently writing and testing an embedded system in which I need to collect data from an accelerometer over a period of time. I already have functions that can read the data at a point in time ...
1
vote
1answer
68 views

Best way to handle 100 GPIO on AT32UC3C0128C

I want to monitor 100 GPIO pins on the AT32UC3C0128C and indicate the changes on the USART (RS-485 transceiver). In the code snippet below, I have set one of the pins as an input with the internal ...
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votes
1answer
25 views

Bridging 3G/LTE from cellphone to IOT device

I have an IOT device that needs to function as an access point, even without close by wifi signals, and then publish a wifi network. I know that I can achieve this with a 3G/LTE/GSM module but given ...
0
votes
1answer
48 views

Accessing I2C address of ADT7516 ( Temp sensor )

I have a BeagleBone Green and an EVAL board of ADT7516. I connected them by SDA and SCL pins and as they are to be connected with the PC by the usb port, they will have a common ground. After this ...
2
votes
1answer
136 views

Problems reading the Delkin Micro SD 16 GB using SPI

I have been working with SD Cards and micro SD Cards for a while. I am using Part1_Physical_Layer_Simplified_Specification_Ver6.00 for reference. I am able to do successful card initialization, ...
1
vote
3answers
114 views

Why Micro-controller Pin is connected to ground via Capacitors? [closed]

I am analyzing a circuit which uses an Micro-controller to measure analog signals rms in digital form. There is one connection of circuit that i am not sure what it does. See the Figure. Here Vref ...
2
votes
2answers
49 views

How to open up serial terminal for my USB device converter (or, how to enable VCP in linux)?

I am using a new Cyclone V SoC board by Enclustra (Mercury+ SA2) mounted on their PE-1 BaseBoard. To connect to the board serially on Windows platform, I have to connect the board which is detected ...
2
votes
1answer
76 views

Embedded Ethernet Solution w/ PoE+; SPI or MII?

I am currently undertaking my first hardware design attempt of an embedded Ethernet project w/ PoE+. I have experience working with embedded systems with Ethernet (mostly ARM M3/M4 processors with ...
-2
votes
1answer
68 views

Connecting Temperature sensor EVAL board (ADT7516) to the BeagleBone Green [closed]

I have a BeagleBone Green and an evaluation board of the temp sensor (ADT7516). I also have a 4-pin female jumper to grove 4 pin conversion cable. I am not an electronics student and have no idea ...
2
votes
2answers
56 views

socketCAN vs OEM drivers

I have a Kvaser mPCIE card on my embedded Linux machine. Most standard Unix distributions come with a socketCAN driver module which takes care of any CAN devices present in the system, hence I can ...
2
votes
2answers
74 views

Commercial Availability of Bare Metal Automation Controllers [closed]

When I think of commercial automation controllers, I typically see 2 levels of system complexity. First, at a lower level, PLC's programmable with ladder logic, structured text or another 61131-3 ...
1
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2answers
78 views

Inside a library of common functions (Instruction Set ----> High Level Program) is there information of how many clock cycles they use?

I am a Mathematical Person. So thinking from that perspective. To make my question slightly more concrete. I was thinking of controlling a hobby servo through a Uart serial data stream. I am ...
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0answers
48 views

NRF24 became noisy after a while

I'm making a gyro mouse using MPU6050, NRF24L01+ connected to STM32F103 board, all soldered to a strip-board. The STM32 reads the sensor and sends data via NRF24 to another NRF24 attached to a USB ...
0
votes
1answer
67 views

Finding the number of bytes written in a larger array [closed]

How can I read the total number of the bytes written into a larger array? For example if 10 bytes are written in a uint8_t array[100], how can I check if the written bytes are 10 and not 20 or 80 or ...
1
vote
4answers
82 views

Single AA cell depletion on series battery

I have a small embedded system that read some sensors every 10 minutes and uploads the data to a server every hour using a 3G module. I'm using 4 Energizer Lithium L91 AA cells in series to power the ...
0
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2answers
102 views

Getting Accelerometer values from MPU 6050

I m trying to read accelerometer values from mpu 6050 in atmega328p (Arduino UNO). I want an embedded c program that's why don't wanna use any external lib. So I read about I2C protocol, read the ...
3
votes
4answers
159 views

PID Tuning Issue

I'm having issues tuning a PID controller - specifically the I-term. First - here's a little info about my system: I'm heating a coil (R ~= 1.8 Ohms) to 750°F. My power delivery system is working ...
2
votes
3answers
167 views

Why did my micro-controller short out even though the alligator clip of the oscilloscope was connected to a ground pin?

I have a STM32F407G-Discovery board, and I bought a DS1054Z oscilloscope for the purposes of debugging. Before I did anything, I went through videos and articles about how to use it. From my very ...
5
votes
2answers
719 views

How to get 8MHz square signal out a pic18f45

I am using a Pic18F45K40 to control an ST7590 power line networking chip which requires an 8MHz clock signal to function. I read the datasheet and it looks like a 16MHz signal can be generated from ...
-3
votes
1answer
82 views

FPGA Applications [closed]

I am keen on learning about FPGA's. I am looking for some recommendations on cheap(reasonably) dev boards and suitable software suite. I am also looking for some real work applications that I can ...
0
votes
0answers
55 views

Embedding a javascript interpreter

I don't have an embedded or CS background, my experience is in web development. I've been doing small projects with Espruino https://www.espruino.com/, https://github.com/espruino/Espruino. It's a ...
0
votes
1answer
24 views

Is it possible to use multiple bluetooth profiles for a pair of devices?

I have a project in mind that uses Bluetooth and I'm currently doing some research. What I have in mind is to build an app that can send audio signal via bluetooth to a raspberry pi 3 and be able to ...
0
votes
0answers
38 views

Touch sensor identification

I'm trying to convert an old intercom, found in our office building, to do my bidding. The case has a built in mic, speaker, and a kind of touch sensor. I want to hook the three of them up to a NanoPi ...
1
vote
3answers
165 views

SPI interface returns only ones (0xFF)

I'm trying to register an SPI device to my Angstrom Linux (kernel version 3.10) in order to use an ADC chip (LTC2258) for my custom board. Processor that I2m using is Cyclone V, and FPGA handoffs ...
1
vote
2answers
151 views

STM32F4 custom board, low voltage on reset pin

I designed the following the STM32F407vgt6 custom board for a project. I recently soldered the parts, and powered the board up. I tried programming the board via an STM32F429 Discovery board through ...
0
votes
1answer
20 views

Connecting a Lithium battery directly to the GSM module

I have a GSM module (M66 from Quectel) and a single cell Lithium battery,Based on Datasheet module operated in the 3.3 ~ 4.6 V and as I know battery deliver 3.7 ~ 4.2 V based on it's sate of charge....
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votes
0answers
173 views

UART interrupt handling using FreeRTOS

I have two threads: 1. ReadFromUART(): It reads from UART (RX), parses the message and put a command on the messageQueue 2. CommandHandler(): If a message is present in the messageQueue, It execute ...
0
votes
0answers
32 views

busy bit of SD card is always one during voltage negotiation

I am working on SD card. Can anyone tell why host is unable to send CMD2. Are my arguments what I am sending from host are correct? In this, when the host is sending the following set of commands ...
-1
votes
2answers
89 views

Water level detection using non contact sonic sensors

I have been working on a project, where I need to find the water level of underground borewells with a diameter of around 6-10 inches and a depth of up to 100 meters. I have been researching a lot ...
0
votes
1answer
54 views

I2S Clock in Audio Codec on dev board, how is this working?

I'm using a dev board, the keil mcb4300. In the schematic, the audio codec UDA1380HN has the BCKI going to the SYSCLOCK. According to the codec data sheet: BCKI: bit clock input SYSCLOCK: system ...