Questions about programming parts (FPGAs, Flash, etc.) Many software programming questions should be asked instead on Stack Overflow.

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Controlling Arduino from Raspberry Pi

I am trying to simply send a digital output from the Raspberry Pi to trigger some code on an Arduino. I have setup the Pi with the digital output working fine (tested using LED) however, I cant seem ...
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1answer
28 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 ...
0
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1answer
25 views

Using a Arduino Pro Mini to power more than 2 servos

I don't know very much about Arduino, but from some basic research I have read that the Arduino Pro Mini can only support two servo motors. I am trying to create a set of reaction wheels using hard ...
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0answers
4 views

How to return the value in arundio function (that can be read by the connect device)? [migrated]

Right now I have an RC car program of arundio. The code is like this: ...
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0answers
7 views

Get the uploaded code from arduino by using arduino IDE 1.0.6 [migrated]

Recently bought a arduino device which already have program, it is model AR-293D and I have already connect it with my PC(windows 7) through usb when I open the IDE , It seems there is no function ...
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1answer
22 views

display multiple data

I want to display 4 different data on a multiplexed seven segment display .I am able to display 2 data for a certain interval ,now i want to expand this to 4.How to do this . ...
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0answers
31 views

Introdution to CUPL with Example?

I want to introduce with CUPL programming but i need a example.for example if i write a hex bcd to 7 seg decoder how i write it in CUPL?(I can write it with verilog but i want it into CUPL)
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2answers
61 views

Is PIC microcontroller PIC16C72 and PIC16F72 almost the same from a programmer's perspective?

I just wrote a program to use in PIC16F72. I was trying to simulate it on Proteus and I found that Proteus doesn't have that microcontroller in its library. I read somewhere that PIC16F72 and PIC16C72 ...
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3answers
58 views

Curious how does ALU addressing work like in Assembly code?

When writing assembly code, say R1 = R2 + R3, it is pretty easy to understand the addressing procedure because all registers are close to the ALU. But I find it hard to see how does the ALU go to the ...
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5answers
88 views

Editing/Hacking 8031 Eprom code

Not sure if this is the correct place to ask such a question, but here goes. Ok so I mess around with an old 80's drum machine a lot. It's based around an old 8031 Processor Program code is stored on ...
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0answers
26 views

How to open recent schmatic on Tanner Eda Tools v13.0

This is my first time working with Tanner Eda Tools. I designed the circuit and then I saved the T-spice and S-edit and exported the PDFs successfully. My first problem is that I couldn't open my ...
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1answer
77 views

LC-3 Programming

"Write a program in binary LC-3 machine language. Your program will compute the max of 10 numbers represented in 2's complement format and will store the result in register R5. Your program will begin ...
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2answers
67 views

Choice of the appopriate conditional statement

I'm measuring the width of a PWM puls with the external interrupt: ...
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1answer
55 views

PIN selecting problem over arduino

My schematic as below. I have connected 8 hall sensor as shown in picture. Problem i am facing here is SO, s1, s2 The Led light are not glowing .Even the forard voltage across is 3.9v. i have tested ...
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1answer
116 views

Temperature stabilization with PWM , PID controller with delay system

I am doing a project to control the temperature with PWM. I use peltier, thermistor,mcu and h-bridge mosfet. I want to reach a temperature with an error less than 0.05 and stay at that temperature ...
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3answers
140 views

I'm trying to implement interrupt from RB pins. But it doesn't work

I'm new to PIC programming. I made a program to get interrupt from RB pins. but it doesn't work. My code is as follows: ...
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0answers
50 views

Reading of data from USB2LPT cable IEEE 1284 controller

From PIC controller, I want to read parallel port data using this USB2LPT converter cable. At every print from PC, I just receive 0x1B, and then printing stops. I am using ...
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2answers
119 views

What would be a good language interpreter to implement into a Microcontroller [closed]

For beginners it is always a problem getting started with microcontrollers. The biggest problem is getting the whole system running and then programming it with C. C is a great language but it has its ...
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1answer
52 views

How does the PIC's PMCON1.WRERR bit actually work?

I know from the datasheet that it gets set automatically on a rising edge of the WR bit and cleared automatically on a successful completion. Thus, if it's still on, then something went wrong. So ...
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2answers
118 views

Can I use math functions in PIC16F877A code?

Can I use exponential (exp) math function in PIC16F877A code? For example like this: double a,ans; a=5.7; ans=exp(0.5);
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3answers
75 views

Globlal Variable Problem: Pic18f4550 and Pickit3 Debugging

I'm working on a project which includes the usage of the A/D converter module in the micro-controller (pic18f4550). I haven't had any problems in the past with the micro-controller using a pickit3 ...
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5answers
964 views

How to start reverse engineering a circuit?

I have an old controller card from a pc which had to control some stepper engines. But there are several problems with it: The pc isn't working anymore, and I have no access to the program which ...
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1answer
56 views

Is it possible to connect FT2232D's 3V3OUT pin to VCCIO for USB-JTAG programming?

I want to design a USB-JTAG Programmer with FT2232D. And I want to program Xilinx spartan3 FPGA with it, so I need 3.3 volt logic for VCCIO. Datasheet indicates that FT2232D has an internal regulator ...
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0answers
47 views

Elan microcontroller program not working

I am writing a program for an ELAN EM78P156NP using the WisePlus C Compiler, but my program is not responding when written on microcontroller. Below is the code written, please let me know any ...
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0answers
112 views

Programming pic24fv32ka301 only works after resetting by turn off

I am only able to program my pic24fv32ka301 after I turn the power off and on. When I try to program the pic without resetting the device, one of the two errors is displayed: ...
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1answer
66 views

ELAN EM78P156NP microcntroller programming

I am writing program for ELAN EM78P156NP using WisePlus C Compiler ,but my program is not responding when written on micro controller.I am putting the code below please let me know what is wrong with ...
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0answers
102 views

AtmelStudio 6.2 changes the ISP clock when I try to run a program

I'm having a strange problem with AtmelStudio. I took a few screenshots: Here, atmel studio is open and I check the project settings. ISP Clock is set to 125kHz. This is good. I also check the ...
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0answers
70 views

Using the UHD (USRP Hardware driver)

I've compiled and built an USRP Hardware Driver (UHD) and want to understand how this driver works. I need to understand the form in which it sends data to a USRP-device, but without using an actual ...
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2answers
98 views

No response from AVR microprocessor while programming

I've been attempting to program a few different micro-controllers using nothing but an FTDI 5V TTL cable and self-written software to bitbang the needed pins on the chips. Until now I had success only ...
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10answers
3k views

Do Electrical Engineers use microcontrollers? [closed]

I've always loved to program, and I just recently became interested in electronics and programming microcontrollers. It is very fun, but I am wondering if I am learning something useful that can get a ...
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3answers
106 views

Reprogram / modify existing products containing microcontrollers

Is it possible to reprogram a device containing a microcontroller if I know the name of the microcontroller and have the necessary equipment to program a clean microcontroller of the same type? To be ...
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0answers
61 views

ELAN microcontroller programming

I am new to ELAN microcontrollers , I am trying to program EM78P156N using UWTR from ELAN. I am facing problems as I do not know the correct procedure to program ELAN controllers. Can anybody please ...
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1answer
38 views

Optimum aspect ratio for storing data in Block RAMs

I am working on Xilinx virtex 4 FPGA. I want to store some filter coefficients in Block RAMs. Specifically, I have many sets of filter, each set having 64 coefficient, each coefficient is of 18 bits. ...
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5answers
1k views

Can an operational amplifier circuit be made entirely out of diode Nand and Nor gates?

I'm not sure whether this question has been asked before, but in researching my question, I came across this user's post (at If-else decision structure using op amps or any other non-programmable ...
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1answer
233 views

How to intitalize data in Program Memory

Im using MPLAB IDE & C18 compiler to program Pic18f2550. I have to initialize a const string in program memory to save space in RAM how do I do it ?
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2answers
257 views

Changing to relocatable code for PIC microcontrollers

I've come back to PIC programming after 10 years and I've been relearning everything. I'm looking at the section in the MPASM manual where it discusses relocatable code. And I've come to the ...
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2answers
666 views

Do I have to use external clock for ATmega ISP programming after changing fuse bits?

After programming an ATmega microcontroller via ISP (SPI) interface and changing the clock-related fuse bits, I'd like to reprogram it again. Will I have to connect it to an external clock now to do ...
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1answer
369 views

Possible to re-program microcontroller over Bluetooth?

I am looking at making an embedded design featuring an ARM Cortex M3 MCU and bluetooth. I would like to be able to update its firmware over Bluetooth periodically. Is this possible with the following ...
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1answer
126 views

Is there a way to avoid an infinite loop and reduce CPU power consumption when using PIC and timer0 interrupt?

I have made a simple program that runs on a P12F629 microcontroller, using MikroC. I need ...
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3answers
181 views

Where do you find out how to program a specific microprocessor?

I have experience with AVRs, by programming them through the SPI port, but right now I'm looking at a Holtek HT46R22 and I can't find anything about how to program this Microprocessor. My question is ...
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1answer
90 views

using mbed with gps

I am trying to program an mbed micro controller to work with a GlobalSat EM 406 GPS receiver and have got it outputting long and lat to a host computer using the information on: ...
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2answers
564 views

ISR - to flag or not to flag?

From what I read on the internet we should respond to interrupts as quickly as possible, when programming microcontrollers; and that flags should be avoided because they tend to compound over time. ...
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2answers
226 views

Memory locations in AVR hex file

I am trying to understand the hex file generated by the AVR Studio. I wrote a code in assembly. The code is as follows: ...
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2answers
84 views

What are the implications of a ROMLESS device?

I was looking through the microcontrollers area of Digikey and I noticed a device that i'm interested in although there is the description of "ROMLESS" in the program memory type. ...
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4answers
7k views

How different are 8-bit microcontrollers from 32-bit microcontrollers when it comes to programming them

Right, so we have 8-bit, 16-bit and 32-bit microcontrollers in this world at the moment. All of them are often used. How different is it to program 8-bit and 16-bit micrcontrollers? I mean, does it ...
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3answers
4k views

Programming an ATMega328 with Arduino bootloader via a FTDI USB-serial adapter

I would like your advice relating to using the Arduino IDE and avrdude to program an ATmega328 which is preloaded with an Arduino bootloader. I am using a USB to TTL-serial breakout board based on an ...
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1answer
110 views

Programming an EPROM using 8085 kit

I need to program an EPROM/EEPROM with the code for an 8085. I do not have a programmer. I can't buy one. But I have access to an 8085 kit. Can I use it to program the EPROM/EEPROM via an interface? ...
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1answer
285 views

Tutorials on embedded programing using Zynq 7020 with ARM processor

Just as the question states. I have been having trouble being able to just test out the programming side of the ARM processor on the TE0720 board. I have been searching online for how to setup the ...
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1answer
231 views

Program LPC1343 thru USB bootloader with the right FILE format

I'm having a real hardtime programming my LPC1343 with the method mentioned in this question (Can an LPC1343 accept its initial program over USB?). I am using a Linux machine and arm-none-eabi-gcc. I ...
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3answers
326 views

Why set PORTx before TRISx?

I was browsing through the example code that MikroE provides for PIC programming using MikroC, and they always set PORTx before setting TRISx. What is the reason for this? Since TRIS just selects ...