AVR is a 8- and 32-bit microcontroller core developed by Atmel. AVR was chosen as microcontroller for the popular Arduino SBCs.
7
votes
3answers
174 views
Switching from PIC to AVR [closed]
I have worked with PIC16 and PIC18s for over three years now and would like to get to know AVR as well. I have no specific project in mind, but would like to try around with the different ...
1
vote
1answer
54 views
How to power a 12v outdoor project with microprocessor?
Forgive me if this is a really basic question, but I'm still at the "consideration" stage of a basic LED project, thinking about lighting up one of those flexible LED strips from a microcontroller ...
0
votes
1answer
35 views
Fuse settigns in ATmega128 Micro controller
As I am working with ATmega128 new board. In AT128 datasheet described that The "ATmega128 is by default shipped in ATmega103 compatibility mode". So in ATmega103 mode not able to use both serial ...
0
votes
1answer
51 views
Why Atmel TWI doesnt support I2C START BYTE on TWI?
I would like to know why Atmel TWI doesnt support I2C start byte.
I am reading the AT32UC3C2512C datasheet on the TWI part, and I can see it doesnt support the START BYTE from I2C (it's on page 698), ...
5
votes
1answer
113 views
AVR Pin Dual Use: Input and Output at (seemingly) the same time
I have been working on a few different versions of a bicycle light control circuit which reads in various buttons and sets various outputs accordingly such as headlight, taillight, blinkers, etc.
My ...
2
votes
1answer
41 views
Wiring optical incremental encoder
I'm trying to connect an optical encoder (Bourns EN series) to AVR microcontroller, and a few things are not clear for me from the datasheet.
At first, datasheet says that the maximum supply current ...
0
votes
1answer
44 views
Understanding a circuit label in ICSP programmer for atmega
I am completely new in electronics. I wanted to make a programmer (or burner) to burn my program in my Atmel16a microcontroller. I found a circuit on the internet:
(source)
Everything is clear, ...
2
votes
2answers
125 views
Compare AVR programming tools
I am dealing with PICs for some time and now I want to learn how to use an AVR. I have 2 MCUs in here, the AT32UC3C2512C-A2UT and the ATXMEGA32A4U-AU but I still dont have any programming tools.
In ...
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votes
2answers
179 views
AVR - How to program an AVR chip in Linux
I recently got an AVRISmkII AVR programmer, and I have an ATtiny85 and ATmega328. I was wondering how I could program these chips (with the programmer) but when I try getting Atmel Studio 6 it is only ...
-2
votes
1answer
46 views
Choosing a good 4+ pin connector/cable for connecting AVRs [closed]
I'm working on a project where I2C and power is passed between multiple devices and am trying to select a good choice of connector/cable to use between devices which will be daisy chained.
The key ...
5
votes
5answers
293 views
Microcontrollers - Beginner questions
How do you determine how many sensors a microcontroller can use?
My understanding is you can't use C# directly on any microcontroller but you can use C# and communicate over the USB and look for a ...
1
vote
1answer
60 views
Unable to upload arduino sketch to Uno using AVR ISP MKII and Ubuntu 12.04
About a week ago, I tried to use my Arduino Uno to program a a standalone atmega328p with optiboot. Not only was I unsuccessful, but now I can't upload sketches to the original atmega chip. The "L" ...
2
votes
2answers
80 views
Arduino w/ Atmega328: can't clear the watchdog
I'm using the onboard software watchdog facility of an Atmega328 like documented here.
My purpose is to limit to 2 seconds the execution of a portion of code that could lead to endless computation.
...
0
votes
1answer
49 views
Converting AVR assembly to machine code - addressing registers?
In AVR Assembly - I want to work out the machine code representation of the following:
ANDI r18,$10
I know the opcode for ANDI is
...
0
votes
1answer
54 views
AVR programming and corresponding machine code
This is a question on a hand out, it asks:
What is the machine code that corresponds to the AVR Assembly Language Instruction inc r22? Enter your answer as a 16 ...
