AVR

Great Reads

Never Buy A Garage Door Remote Again: Open Your Door With Your Android Phone (via Bluetooth)

by raddevus

Steps for building a device you can add to your existing garage door, which implements an atmega328, bluetooth (hc-05) and relay module which will allow you to open your garage door from any paired Android device.

An autonomous roving vehicle Part 2 of n

by Mike Hankey

Part 2 in an on going series of article featuring an Autonomus Rover

Debugging an Arduino project with GDB on Classic ATtiny and Small ATmega MCUs

by Bernhard Nebel

A tutorial for people who finally want to debug their Arduino projects that run on AVR MCUs using the GNU project debugger GDB

Introduction to Simulate External Interrupts Using Atmel Studio for AVR

by Dharmateja Challa

Tip on how to simulate external interrupts using Atmel Studio 7 for AVR Atmega MCUs

Latest Articles

Debugging an Arduino project with GDB on Classic ATtiny and Small ATmega MCUs

by Bernhard Nebel

A tutorial for people who finally want to debug their Arduino projects that run on AVR MCUs using the GNU project debugger GDB

Link-Time Optimization and Debugging of Object-Oriented Programs on AVR MCUs

by Bernhard Nebel

Link-time optimization and debugging OO programs do not work very well together, at least on AVR MCUs.

Motorcycle Signal Lights

by Matt McGuire

Using an Arduino Nano to control all the working lights on an old 1978 Suzuki GS500

Faster and More Efficient GPIOs on Arduino Without Modifying the Sketch

by Mohiuddin Awan

I am presenting a new implementation of Arduino GPIO functions which are faster and more efficient than the original functions.

All Articles

top

AVR

Never Buy A Garage Door Remote Again: Open Your Door With Your Android Phone (via Bluetooth)

27 Jul 2016 by raddevus

Java

Android

Bluetooth

An autonomous roving vehicle Part 2 of n

19 Jan 2014 by Mike Hankey

Part 2 in an on going series of article featuring an Autonomus Rover

Debugging an Arduino project with GDB on Classic ATtiny and Small ATmega MCUs

12 Mar 2022 by Bernhard Nebel

A tutorial for people who finally want to debug their Arduino projects that run on AVR MCUs using the GNU project debugger GDB

Introduction to Simulate External Interrupts Using Atmel Studio for AVR

21 Jun 2016 by Dharmateja Challa

Tip on how to simulate external interrupts using Atmel Studio 7 for AVR Atmega MCUs

Arduino

AVR

microcontroller

Link-Time Optimization and Debugging of Object-Oriented Programs on AVR MCUs

6 Jan 2022 by Bernhard Nebel

Link-time optimization and debugging OO programs do not work very well together, at least on AVR MCUs.

How Can I Get Microcontroller Data And Cut Bytes One By One ?

15 Sep 2014 by George Jonsson

You should decide on a format that works for you.The first choice you have is to decide between a binary or ASCII protocol.Both have their pros and cons, but simply putASCII is more readable, easier to debug and good if you want to hook your device up with HyperTerminal.It is a bit...

AVR

serial-port

How do I use a for loop?

23 Sep 2020 by Richard MacCutchan

There is even an online reference: Beginner's introduction to AVR assembler language[^].

Arduino

AVR

How do I use a for loop?

23 Sep 2020 by OriginalGriff

It's pretty simple: so simple I'm not giving you any code! Think about a for loop: for (a ; d ; c) b; a is the intialiazer: set a register to the number of elements in the array. Hint: ldi, anyone? b is the body of code inside the loop....

Arduino

AVR

Can someone explain this code please? I'm learning micro

23 Apr 2021 by CPallini

You could start reading a tutorial on AVR registers. See, for instance AVR I/O Register Configuration - Tutorials[^].

C++

AVR

problem with serial communicate between c# and ATMEGA16!

11 Sep 2014 by Member 11075997

hi guys ...i have a problem with c# serial component ! i want to send data with atmega16 into pc receive that with c# and show on a textbox ! i use this code for c# :using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using...

AVR

serial-port

problem with serial communicate between c# and ATMEGA16!

11 Sep 2014 by User 59241

Where you open the port add the line:serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.datareceived(v=vs.110).aspx[^]Use BeginInvoke()instead of Invoke().You should examine...

AVR

serial-port

How Can I Get Microcontroller Data And Cut Bytes One By One ?

15 Sep 2014 by Member 11075997

hello guys! this is my brief avr source code : int main(void){ sei();//Enable global interrupt USART_Init(MYUBRR ); DDRB |=(0

AVR

serial-port

How Can I Get Microcontroller Data And Cut Bytes One By One ?

15 Sep 2014 by OriginalGriff

Getting the data in C# is simple: just set up a SerialPort class instance, and handle the DataRecieved event. In that, you can fetch data byte-by-byte or as a group, and do with it what you will.Alternatively, set up a background worker thread to read data byte-by-byte from the SerialPort by...

AVR

serial-port

Problem setting-up AVR UART Wireless using RF433MHz

8 Sep 2015 by Sheriyar Siddiqui

I send signal from one MCU board to another using two wires from Tx of frist to Rx of second and vice versa, it did great as i was able to see result on LCD.Then i wanted to try wireless as i have to make a project next month to use in it.So i purchased RF 433MHz Transmitter and Receiver...

AVR

wireless

Updating arduino AVR boar to v. 1.6.12

10 Apr 2017 by Jochen Arndt

From the Arduino - ReleaseNotes[^]: Quote: ARDUINO 1.6.13 - 2016.11.22 ... avr: set default values for "upload.verify" and "program.verify" (allows compatibility with older IDE). It seems that you need board version 1.6.13 if you don't want to install a newer IDE version.

Arduino

AVR

Sending data (serial port) to AVR

15 Nov 2017 by Member 13523184

Hi, i have to make a code to send a data from visual to AVR to MCU and show it on 8 LED 7 segment display. This is my C# code, right now i can't check, if is it working so can you tell me, if is it possible to send data like this? 1st code And if is here someone, who can do Assembly...

AVR

serial-port

Object reference not set to an instance of an object error while running an application

26 Jan 2018 by OriginalGriff

This is one of the most common problems we get asked, and it's also the one we are least equipped to answer, but you are most equipped to answer yourself. Let me just explain what the error means: You have tried to use a variable, property, or a method return value but it contains null - which...

.NET

AVR

Microsoft

Send data from master avr to specific pin in slave avr

26 Apr 2018 by Member 13799356

Hello every one . I want to blink three different Led with master and slave avr eith spi protocol I have interfaced the two avr with spi protocol the problem is when i press one of the three push buttons the three leds blinks. Because the receive condition is the same for the three leds . So i...

embedded

AVR

Send data from master avr to specific pin in slave avr

26 Apr 2018 by Jochen Arndt

This is rather unclear without knowing what you have done so far. But all you have to do is sending data that indicates which button has been pressed. This requires the definition of a "protocol" that defines the meaning of the data transferred via SPI.

embedded

AVR

AVR assembly - led turn on/off using buttons

1 Nov 2019 by Member 14611851

I'm writing assembly code for the ATMEGA328P (arduino uno). i have a example from a book. 'Adjust the previous assignment so that the LED stays on even when you release the button. The LED must remain lit until the other button is pressed' the previous assignment was: 'Create a program that...

assembler

Arduino

AVR

How can in write this assembly program?

3 Oct 2019 by OriginalGriff

Start by reading up on the timer - and we have no idea which one that is, we don;t even know what processor family you are using, much less the actual model, or the rest of your hardware - and work out how to program it to a 0.5 second interval. This calculation will complete the last part of...

assembler

Arduino

AVR

AVR assembly - led turn on/off using buttons

3 Oct 2019 by Richard MacCutchan

You can find many samples at Tinkercad | From mind to design in minutes[^]

assembler

Arduino

AVR

How can in write this assembly program?

3 Oct 2019 by Mike Hankey

It appears you're using an Atmel chip, possibly an ATmega328P? Look in the datasheet, it will become your best friend, in the section on 16-bit timers (TIMER1) under the Modes of operation/Clear Timer on Compare section 13.9.2 page 125 and you will find the formula for the values you will need...

assembler

Arduino

AVR

AVR assembly - led turn on/off using buttons

1 Nov 2019 by Mike Hankey

Write you assignment in C and then look at the .lss file for the assembler code the compiler outputs.

assembler

Arduino

AVR

Can someone explain this code please? I'm learning micro

23 Apr 2021 by OriginalGriff

We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us...

C++

AVR

AVR assembler code to read a ds18b20 and...

27 Apr 2021 by Dave Kreskowiak

You might want to try forums dedicate to AVR if you're looking for someone to write code for you.

assembler

AVR

What’s the purpose of the given code? Are we using the timer in CTC mode? (AVR embedded C programming)

18 Oct 2022 by Rick York

How are we supposed to know? There is no timer visible in this excerpt of code. What is going to happen is the processor is going to spin in the while loop until the OFC1A bit is set in TIFR1. The bit shift operator (

embedded

AVR

Microproccessor and application

2 Dec 2022 by OriginalGriff

While we are more than willing to help those that are stuck, that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for...

AVR

Motorcycle Signal Lights

30 Jun 2018 by Matt McGuire

Using an Arduino Nano to control all the working lights on an old 1978 Suzuki GS500

An autonomous roving vehicle Part 1 of n

24 Nov 2013 by Mike Hankey

A start to finish project outlining the steps and pitfalls of creating an autonomous rover.

AVR Assembler 101

5 Mar 2014 by Mike Hankey

Learn the basic of the AVR micro controller and the assembly language

Faster and More Efficient GPIOs on Arduino Without Modifying the Sketch

13 Aug 2016 by Mohiuddin Awan

I am presenting a new implementation of Arduino GPIO functions which are faster and more efficient than the original functions.

Arduino

AVR

HWA: Hardware Abstraction for Microcontrollers

26 Aug 2015 by Christophe Duparquet

This article introduces a hardware abstraction tool for microcontroller programming.

Howto find out how much RAM your Arduino program uses

2 Apr 2014 by Jan Dolinay

This tip shows how to find out the memory usage for Arduino program

Can someone explain this code please? I'm learning micro

23 Apr 2021 by Dave Kreskowiak

This is a bunch of bit shifts, basically just changing numbers, but what does this actually mean to the hardware attached to the board? Only the person who wrote that code and put the hardware together will know.

C++

AVR

Can someone explain this code please? I'm learning micro

23 Apr 2021 by Julian Lambertin Gutierrez

int main(void) { DDRD=0B00000000; DDRB |=(1

C++

AVR

Updating arduino AVR boar to v. 1.6.12

10 Apr 2017 by Member 13118314

I am using IDE 1.6.9 after updating Arduino AVR Boards to v. 1.6.12, I can no longer upload to board. Going back to v. 1.6.11 and it works again.Tried this on Arduino Mega2560 and Nano. Same result.Any idea? i have just bought Arduino products from this site www.w11stop.com/ard-uino in pakistan....

Arduino

AVR

How can in write this assembly program?

4 Oct 2019 by Member 14611851

Write a program that makes all LEDs blink with a 0.5 second period(in assembly). Use the 16-bit timer 1uit (a) to determine the interval. Generate an interrupt every 0.5 seconds by counting the counter until an "output compare match" is reached. Indicate in your answer how you calculated the...

assembler

Arduino

AVR

How can in write this assembly program?

4 Oct 2019 by Member 14611851

.include "m328Pdef.inc" .def saveSR=r17 .def temp=r18 .org 0x0000 rjmp init .org OC1Aaddr rjmp TIMER init: ldi R16,high(RAMEND) out SPH, R16 ldi r16, low(RAMEND) out SPL, R16 ldi temp, high(31250) sts OCR1AH, temp ldi temp, low(31250) sts OCR1AL, temp ldi temp, (1

assembler

Arduino

AVR

How do I use a for loop?

23 Sep 2020 by imrolis

New to AVR assembly programing language and using Atmel Studio 7. I've done other assignments which they are very simple and easy to complete but I have no idea where to start using arrays and for loops. Write a program using a FOR loop type...

Arduino

AVR

AVR assembler code to read a ds18b20 and...

27 Apr 2021 by Member 14674342

... display temperature on 20 x 4 LCD Anybody got and AVR Assembler code ? Cheers, Peter What I have tried: banging my head against a wall, but that only hurts....

assembler

AVR

Microproccessor and application

2 Dec 2022 by ABX ENGINEERING

Write an assembly program to find the length of a string. The string is stored in the program memory and the length will be stored in the data memory What I have tried: I have tried but i did not get any understanding

AVR

Importing C language variable to javascript

19 Jul 2022 by Hamid Valinejad

I have a question about linking C and JavaScript languages. I have a variable like 'X' in my C program. I could use html, CSS and JavaScript inside my C code therefore I can show whatever I want inside a browser. Well there is my problem! I have...

Importing C language variable to javascript

20 Jul 2022 by Member 15078716

Here is an example to directly answer your question: Your question,"Importing C language variable to javascript". I am not certain that I understand your explaination of the need, so I am attempting to answer the posted question itself...

What’s the purpose of the given code? Are we using the timer in CTC mode? (AVR embedded C programming)

18 Oct 2022 by Waqas Ch

void delay() { TCNT1H = 0; TCNT1L = 0; OCR1A= 15625; TCCR1A = 0; TCCR1B = 0x05; while((TIFR1&(1

embedded

AVR