AVR is the family of microcontrollers used in Arduino boards.
1
vote
2answers
67 views
Optimizing an Arduino code
I am working on project and using Arduino Pro Mini (Atmega328p running on 2xAA) to measure the time to charge a capacitor (when the volt level is high). This is the code I used while testing:
int ...
0
votes
4answers
50 views
How to program a CLK signal and its inverse with Arduino/AVR
Is it possible to simultaneously output a clock signal and it's inverse using the timer register(s)?
I'm using the following code in arduino to output a 1MHz signal on OC1A:
//Use Timer/Counter1 to ...
0
votes
1answer
27 views
Unable to upload code to the arduino nano
I tried to to upload a hex file I generated for the arduino nano using avrdude but I keep getting the error:
avrdude: stk500_2_ReceiveMessage(): timeout
First the arduino board stops doing whatever ...
0
votes
4answers
72 views
Float arithmetic vs. int arithmetic - is there any power penalty?
It is widely known that float arithmetic takes longer (that is, eats more cycles) than fixed-point (or integer, or bitwise arithmetic), and that surely is something to consider for speed- and ...
1
vote
1answer
31 views
Programming “Arduino” code to AT90S8515?
I found (from a previous life) an STK500 and a couple AT90S8515's in the recesses of my basement.. that I would like to put to use.
Is there a way in which I can write "arduino code" for the 8515? ...
0
votes
1answer
35 views
ATtiny461 PWM CTC mode help
I am a beginner at AVR and programming. I am using ATtiny461 and asked to make code to use timer in PWM and CTC mode and use interrupts and pin toggle, this code worked for me with normal timer and ...
1
vote
1answer
76 views
Software I2C - Atmega8
I am using Atmega8 with 12MHz crystal, on my breadbord. I can use SDA and SCL pins with default arduino library wire.h, and it works. But I want another pins to use I2C protocol.
I tried library, ...
0
votes
2answers
81 views
32u4 timer 4 pwm frequency help
I have extracted the following code from the multiwii project. It generates a ~490-500hz pwm signal on pin 6 which is used to drive an esc.
I want to change this frequency down to 50Hz to drive a ...
-1
votes
1answer
39 views
pwm timers, channels and pins
Ive got this code from multiwii project, which is relevant to the hardware 32u4 i have. It part of a function called initOutput()
In the comment it says "connect pin 6", which is the bit of that whic ...
0
votes
0answers
47 views
Programming an AVR using ISP
I am trying to program an atmega with arduino sketch using ISP only (mac user).
So I know how to burn a boot loader, and then to program the chip using the TX, RX. But I would like to program it ...
4
votes
1answer
75 views
Remove Bootloader on Arduinos
I am trying to move from arduinos to AVR C. Would somebody know how to remove the arduino bootloader from the microcontroller? Is there a different process for the different atmega microcontrollers ...
0
votes
1answer
97 views
Can't use base class and derived class functions
I have made two libraries and one test program.I have made my custom uart library.first i have included all functions for printing in single uart library file.but then i have made print library for ...
2
votes
1answer
152 views
Custom Arduino library problem
I have made my custom serial(UART) library.
So I made uart.h and uart.cpp files as following.
uart.h
#ifndef UART_H
#define UART_H
#include <avr/io.h>
#include <stdlib.h>
...
4
votes
1answer
450 views
Basic makefile for avr-gcc
I would like to make a makefile for compiling c programs for the arduino. I am somewhat familiar with make but have never used it with avr-gcc. What is the simplest way I could put the commands below ...
4
votes
1answer
73 views
How can I indicate that I am using ATmega2560 so that Arduino libraries understand it?
I am developing AVR microcontollers in Atmle Studio and sometimes I am using Arduino libraries(such as LiquidCrystal).
When I initialize LiquidCrystal lcd(12, 11, 5, 4, 3, 2); I don't think Arduino ...
0
votes
1answer
254 views
Arduino Attiny 85 IR library compiler error
I'm about to ask a question for the most common problem which everyone has with attiny85 and the IR library. I will try to make this question as simple as possible.
Few things about the lib and the ...
0
votes
1answer
62 views
AVR Timer1 OCR1A controls TIMER1_COMPB_vect interrupt!
I was struggling with timer interrupts in my project. I couldn't make it work properly. So I decided writing a simple code and I saw a very interesting case.
ISR(TIMER1_COMPB_vect)
{
PORTB ^= ...
0
votes
0answers
105 views
Can't get LCD(1602A v2) to communicate with AVR ATMEGA2560
I have written the following code to communicate with an LCD display yet I can not get data to appear on the screen. All I get is white boxes on the display. I am properly controlling the RW, RS and ...
1
vote
1answer
130 views
Porting Arduino code to AVR/C++ input not working?
So. I'm trying to read an input on the Arduino Nano using C++/AVR/Eclipse instead of the regular arduino IDE.
The code below is working in the arduino IDE
void setup() {
// put your setup code ...
0
votes
3answers
58 views
Modify the call stack of interrupts on Arduino
I'm working with Arduino's libraries. And my interest in the possibility to change the call stack of the SPI interrupt, this because I want: after the interrupt happen, the program could jump to other ...
0
votes
1answer
36 views
Unusual behaviour when moving data to PROGMEM
I've got some working code with a definition that looks like this:
const unsigned char DynTextPositions[10][4][4] = {
...
};
Which is defined / referenced via a header:
#include ...
0
votes
2answers
87 views
use arduino ide for USB isp programmer
A few years ago I programmed AVR atmega8 with Avr studio by USB isp programmer.
I was using C language. Now I would like to use arduino(C++) langauge and my external USB isp programmer. Is it ...
0
votes
2answers
101 views
Use Arduino Uno to program the on-board Atmega328 in C
I have an Arduino Uno board. I have seen how it is possible to program external AVR's through the Arduino Uno board, for instance an ATtiny. But I'm starting with c for atmel µc and I just want to ...
2
votes
1answer
225 views
Storing in a global variable using inline assembly
What I'm trying to do is pretty basic: I have a global variable and I'm trying to store some value in it (specifically, the SP_H and SP_L values).
The variable is an array of structs and I'm trying ...
0
votes
1answer
52 views
Which Arduino is compatible for atmega164pa
I am working on a project using 5 pins of ADC, 5 pins for PWM, and LCD. I need to use Atmega164pa. I would like to know how I can transfer it to Arduino. Is there any Arduino compatible with this ...
0
votes
0answers
88 views
Arduino Due - Multiple Serial Lines
I'm trying to interface with a serial device utilizing Serial1 (pins 18,19) on the Arduino Due. The normal serial port (Serial) is working just fine and is acting as a debug port at the moment - It's ...
0
votes
1answer
52 views
Arduino-like boards with other microcontrollers
Are there any Arduino-like board designs that are NOT using an AVR chip, but perhaps a chip like the Z80 or the 6502?
1
vote
4answers
2k views
New to Arduino: Should I learn C, C++ or both (C & C++)?
From what i've researched here is my thoughts on both
C++
I heard that you can create libraries using C++ in arduino. And you can use the Arduino IDE to do that stuff. Here is the proof
...
0
votes
2answers
501 views
Unable to flash bootloader on ATmega32U4 with AVR dragon
I am flashing a naked ATmega32U4, but the process fails in the end where it is verifying.
avrdude -c dragon_isp -p m32u4 -P usb -U flash:w:Caterina-Micro.hex -U lfuse:w:0xff:m -U hfuse:w:0xd8:m -U ...
1
vote
2answers
86 views
In system programming for avr?
I generally use sockets for AVRs in standalone circuits, but sometimes I sell my items and therefore I soldier the chip on the circuit. As you guess I can upgrade the code inside the chip with socket ...
2
votes
2answers
266 views
Can I program AVR Microcontrollers using Arduino Development board with AVR Studio?
I know and I can program any AVR microcontroller with Arduino IDE and Arduino Uno board. Can I use Arduino board with AVR Studio? Or I have to buy an AVR Development board?
1
vote
2answers
140 views
Is Arduino IDE enough to program with C or C++?
I am using Arduino IDE to program my ATmegas with bootloaders. I can directly manipulate ports, use timers, interrupts, PWM pins and timers, etc. Everything is working. But this question arises: Does ...
3
votes
1answer
191 views
How can I make pinMode calls faster?
I'm trying to use 3 pins as capacitive pins along side the Mozzi.
I had several attempts and so far the closest I had was using code from the ADCTouch library straight into the main code, but with ...
-1
votes
1answer
55 views
Can Arduino's open design be “scaled” to 64-bit CPUs?
If Arduino is OSH that simply uses 8-bit Atmel AVR MCU as a design component, then can Arduino somehow be tweaked to work with a 64-bit CPU/MCU? If so, what might this entail?
1
vote
3answers
301 views
How are Arduino's OSH if Atmel AVR is proprietary?
I keep reading how Arduinos are "open source", but my understanding of OSH is that all its components must be open source.
Arduino uses an Atmel AVR CPU - but Googling this shows the Atmel is ...
0
votes
1answer
271 views
Driving conveyor belts using Arduino Unos
We are planning to drive conveyor belts with Arduino Unos using stepper motors. We are planning to use easy drivers, so that we control at least 3 motors with one Uno. Currently we are still at an ...
0
votes
1answer
80 views
Interrupts don't work
I tried to run a sketch that tests my AVR's interrupts,
I have an UNoriginal Arduino Uno, and I've checked pins 2 and 3 like the following:
- at void setup()
attachInterrupt(2, inter, CHANGE);
- at ...
0
votes
1answer
29 views
AVR ATmega328p-pu operating circuit?
I used to work with PIC micro-controller so i know what it needs to work from operating circuit to crystal oscillators needed and other components to power it up , my question here where can i find ...
0
votes
1answer
64 views
Is it possible to use Arduino UNO programmer for other AVR microcontrollers?
I got an Arduino UNO which I started using with microc for avr to add more customizations.
I'm wondering if it is possible to use the Arduino UNO programmer to program other AVR microcontrollers (I ...
1
vote
1answer
257 views
ATmega32u4 bootloader
Hey all this would be my first encounter needing to burn the Arduino IDE bootloader onto a blank ATMega32u4 that I bought from Digikey.
What all do I need to buy in order to program the bootloader ...
4
votes
1answer
50 views
Does porting code to different MCU clock frequency affect serial baud rate?
Tried to upload my Arduino Uno sketch that writes to serial UART at 9600 baud rate onto my ATtiny2313 running at 1MHz. Not getting the signal on the ATtiny, does this have to do with my clock ...
0
votes
1answer
484 views
error: ‘sleep’ was not declared in this scope
I am trying to use the sleep function in lieu of delay(), but when I include sleep(), I get Sweep.cpp:60:10: error: ‘sleep’ was not declared in this scope
I read some place, about #include ...
0
votes
0answers
299 views
Arduino Mega 2560 as ISP for ATTINY2313 / ATMEGA328P
I have posted this on the Arduino forum also, but I give it more chance if posted here also.
I've been trying to use my Arduino Mega as an ISP for programming two different ATMEGA328P's and a ...
4
votes
1answer
235 views
Cannot compile C++11 code via Makefile
I am building my Arduino project with a makefile:
BOARD_TAG = uno
ARDUINO_PORT = /dev/ttyACM0
USER_LIB_PATH = /home/prakhar/dev/alfred/arduino/libraries
CPPFLAGS=-x c++ -std=c++11 -Wall ...
0
votes
1answer
63 views
Atmel STK500 and Atmel Studio
Is the Atmel STK500 worth using as a AVR programmer and Dev board? I am starting to get to into AVR programming with Atmel studio. I plan on purchasing the AVRDragon and also looking into purchasing ...
2
votes
1answer
1k views
Is it possible to program an Attiny85 with a USB-to-TTL converter?
I currently use my Arduino to program Attiny85. As I have one of these USB-to-TTL adapters I am wondering if it is possible to program Attiny85 with it, to free up my Arduino. I know it is possible to ...
0
votes
2answers
903 views
Using Arduino as USB Device?
I'm trying to get audio data from an ADC connected to an Arduino into a host PC. I've done some digging and found LUFA, which I think Arduino uses under the hood. Is it possible to use the Arduino as ...
1
vote
4answers
190 views
Using Arduino to learn AVR programming
I want to learn AVR C programming instead of arduino programming. I have an arduino UNO board and few Atmega328 chips that I bought, and Atmel studio for programming. Can I use Arduino Uno board as ...
3
votes
3answers
2k views
I bought USB > FT232RL, can I use it to program a bootloader onto an Arduino?
I bought this thing off of eBay:
eBay Link
Will it allow me to program an ATmega[xxx] (Arduino clone) with a bootloader?
--> If so, how would I go about it? What should I do, and what should I ...
8
votes
4answers
13k views
Arduino compatible's serial port not showing Mac OSX
I bought an Arduino-compatible Freaduino board atmega8 (I selected the board type as Arduino ng or older atmega8). I installed the Arduino IDE on Mac OS X and the FTDI drivers. But my serial port ...
