AVR is the family of microcontrollers used in Arduino boards.
0
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1answer
41 views
10 bit PWM on Arduino UNO
I am using this code to make 10 bit PWM on port number 9, it seems like everything printed is 0,1022 rather than printing 0, 512, 1023. Is there a problem in my code ?
I wired pin9 to A3 to get the ...
0
votes
1answer
20 views
Problem with microSD SPI mode in AVR
I'm trying to read a microSD block. But I don't know why it doesn't work.
I do:
CS_UP;
for(uint8_t i = 0; i <14; i++){ /* Send 74+ clocks */
spi_tranceiver(0xff);
}
_delay_ms(1); /* Wait 1 ms ...
1
vote
1answer
41 views
AVR timer overflow interrupt not working
My problem is an interrupt service routine (ISR) that seemingly never executes! Here's some info on my set up: I am flashing an avr attiny85. I have the bare bones of a project set up so far with ...
0
votes
1answer
22 views
avr-gcc -D is ignored
Im trying to use XCode to compile avr program with arduino libs but seems like something wrong with my Makefile because it throws me warnings like
# warning "F_CPU not defined for <util/delay.h&...
0
votes
2answers
31 views
Arduino uno board not detected when connected via USB no matter what OS
I was working with Arduino in Win 8.1, when suddenly it stopped work. I tried to reinstall the drivers and IDE several times, but it didn't solved.
In Win 8.1, when I plug the arduino, I get the pop ...
0
votes
1answer
34 views
Using Atmel Studio with Arduino Starter Kit (Uno MCU)
Can someone tell me if it's possible AND safe to use Atmel Studio with Arduino Starter Kit? I'm a newbie to firmware in general and I don't want to "brick" my Arduino Uno Microcontroller. I don't ...
1
vote
0answers
19 views
BASCOM-AVR stk500_2_ReceiveMessage(): timeout: -1
Arduino Uno R3
Windows 10
Bascom AVR
The ON is alright.
The LED flickers now and then.
The RX and TX flickers when I press the program button on Bascom but then disappears almost immediately.
...
0
votes
1answer
112 views
From Wiring to pure C
I'm using the Teensy 2.0 (atmega32u4) and decided to switch from Arduino IDE with Wiring to pure C. I think it's much more useful to master programming microcontrollers on that level. Wiring seems to ...
1
vote
2answers
65 views
AVR (Arduino Uno) Serial.print and Serial.println only printing 1 or 2 chars
I first used the Arduino IDE but now I'm using PlatformIO which is awesome. But I have some big trouble with Serial.print() and Serial.println(). To show this error I have the following example code:
...
1
vote
1answer
60 views
Atmega328p programming with Arduino libraries
I'm trying to use the serial communication to work between a naked AVR Atmega328p and a computer (OS X and Linux Ubuntu).
I can program the atmega (using a pololu programmer), I make it blink a LED ...
2
votes
1answer
94 views
Uploading .hex to ATTiny13 using Arduino
I would like to upload a .hex to ATTiny13V (or '13A) using Arduino Uno R3.
I think I know everything to do, but ATTiny13 ISP support and Arduino IDE is a bit search-and-find, and I have some grey-...
0
votes
3answers
99 views
Why can't the Atmel ATtiny family delay over a minute?
I have some really simple code and tested on an 8 MHz ATtiny85 and ATtiny2313. It's basically a blocking blink:
int relayPin = 7;
long offPeriod = 1 * 60 * 1000;
long onPeriod = 1 * 60 * 1000;
...
2
votes
0answers
42 views
Issues graduating to AVR-C
I'm trying to make the transition from coding in the arduino language to AVR-C, but I'm having some issues with my microcontrollers.
I don't have an ISP, so I'm using one of my Arudino UNOs with the ...
0
votes
0answers
39 views
Atmega328P and Arduino Studio and Pololu AVR - not working
I have standalone ATMega328p and I'm using external 16MHz oscillator, I hooked up and I triple checked my connections for Pololu AVR programmer and I make sure that I select a proper programmer \ ...
0
votes
3answers
73 views
Is the Arduino bootloader really the Atmel bootloader? Can I use Flip to upload?
I've been asked to do a small project using an Ada BlueFruit board. It has a ATMega32U4. The 32U4 comes from the factory with a bootloader pre-installed. I've never used an Arduino before, but I have ...
0
votes
0answers
20 views
USBasp USBTinyISP software interface differences?
In windows device manager, you can tell two common families of AVR programmers apart by looking at the properties page, details tab.
The USBasp programmer reports its USB Hardware ID is VID_16C0&...
1
vote
1answer
55 views
Complete Bread board arduino
I bought a ATmega328 microcontroller and burn the bootloader. Now I want to upload code directly from pc to the microcontroller on bread board. I have max232 ic for the communication but I recently ...
1
vote
4answers
158 views
Good book/reference for AVR coding in pure C/C++?
Can someone recommend a good book/reference for going vanilla (i.e. not using arduino simplified language) on e.g. ATtiny85? I will need to use the equivalents of analogRead() and digitalRead() quite ...
3
votes
1answer
65 views
Cannot enter programming mode on Arduino Uno
I have an Arduino Uno that I've been programming with an AVR Dragon through Atmel Studio 7.
I did two things in close proximity, and I'm not entire sure which action is the culprit. I tried using the ...
0
votes
2answers
63 views
does eeprom_write_block function of avr.eeprom.h writes a NULL terminated string or we have to manually null terminate it
http://www.nongnu.org/avr-libc/user-manual/group__avr__eeprom.html
I am trying to figure out that if we use eeprom_write_block function or eeprom_update_block function do we need to manually null ...
1
vote
1answer
75 views
Unable to replicate Arduino code into ATmega8 code
I am trying to replicate an LTC Audio Decoder code from Arduino Uno into AVR ATmega8 which I got from here.
My Arduino Uno code is working great. Here is my Arduino Uno code:
#define one_time_max ...
0
votes
1answer
91 views
Porting ATMega8 AVR based program to Intel Curie Processor
I'm currently trying to port a program called 'ArduinoUSBLinker' to work on my Arduino 101 (which has an Intel Curie CPU instead of the standard ATMega CPU).
The program is used to flash ESCs without ...
1
vote
3answers
106 views
can homemade arduino be powered up with battery?
I am new to arduino. It is costly for me to buy an arduino uno board. Therefore I am going to make a Arduino with breadboard at my home. I also want to make my Arduino portable. Arduino Uno boards can ...
0
votes
1answer
30 views
IO Control and Configuration
I am using Eclipse to program a ATMega2560 and would like to stay away from the Arduino library, While looking through AVR Examples I have seen the syntax
#include <avr/io.h>
PORTD.0 = 1
or
...
0
votes
0answers
672 views
Arduino IDE and avrdude - cannot upload sketch
Every time I want to upload a sketch (Mac OS X 10.11.4, Arduino IDE 1.6.7), I get the following error:
Sketch uses 1,066 bytes (3%) of program storage space. Maximum is 30,720 bytes.
Global ...
-1
votes
1answer
46 views
AVR has no vprintf_P?
Well this was unexpected. AVR libc has many the variants of printf, including vprintf, but is missing vprintf_P. Is this really just not present or implemented elsewhere?
2
votes
1answer
161 views
How to use printf with Arduino's serial ports without an intermediary buffer?
How to use printf with Arduino's streams without an intermediary buffer? The following seems unnecessary:
char buf[256];
sprintf(buf, ...);
Serial.print(buf);
Is there a way to connect ...
1
vote
0answers
27 views
Why am I only receiving the first address byte? (I2C Protocol)
Expecting the slave to ACKnowledge and return data, but it does not. This is my protocol. This is my Datasheet.
Also FYI I'm on an Arduino Fio but I am not inheriting the Arduino library.
#include &...
1
vote
1answer
70 views
How do I use SNAP protocol, correctly?
I've reviewed the documentation
I'm still a little lost when it comes to applying the functions. Each of the redundancy check methods take in an unsigned char and return an unsigned char.
Shouldn't ...
1
vote
1answer
195 views
How do I use an AtTiny85 (or other AtTiny) with Arduino?
Please mind that this is an "example" question.
How to make a "tiny arduino"?
I've ordered a bunch of ATtiny85's off E-bay, they're like tiny Arduino's.
I've set up the latest Arduino IDE and would ...
1
vote
0answers
115 views
Does Proteus simulate external interrupts properly using Arduino? I can't get them to work
I am trying to simulate an interrupt with an Arduino Uno in Proteus. This is the simple test code that I'm using:
void introutine()
{
digitalWrite(13,HIGH);
}
void setup()
{
pinMode(13,OUTPUT);
...
1
vote
1answer
52 views
Using AVR Timer Within an ISR
I'm trying to create an ISR which operates for 15 seconds when a particular button is pressed. I'm attempting to use the AVR functions on my Arduino Uno to start counting when it enters the ISR, then ...
-1
votes
1answer
58 views
Programming an ATtiny85
Recently I ordered some ATtiny85's from Jameco, and I've been trying to upload code to them through an Arduino Uno, following the instructions from this video on YouTube. I've been getting a lot of ...
-1
votes
1answer
601 views
Error uploading to ATtiny
I followed Great Scott's video on YouTube for uploading to an ATtiny85. When I tried I got the following error messages:
Arduino: 1.6.7 (Windows Vista), Board: "ATtiny85 (internal 8 MHz clock)"
...
0
votes
1answer
131 views
Timer/Counter programming Arduino
I'm trying to blink an LED on an ATMega328P (same MCU as Arduino I think..) using the internal timer but I'm stuck since it doesn't seem to light the LED at all....
#include <avr/io.h>
//#...
3
votes
2answers
597 views
Since double and float represent the same data type (usually), which is preferable?
It looks like on ATMega based boards, float and double are equivalent 32-bit (4-byte) data types.
However, on the Arduino Due, doubles are 64-bit (8-byte) where floats are 32-bit (4-byte), same as ...
0
votes
1answer
56 views
Switching LED on and off using microcontroller
I am new to microcontrollers and just become confused trying to solve the following problem:
An ATmega32 chip is connected to four on/off switches (SW0-SW3) and 4 LEDs (LED0-LED3). SWi is connected ...
1
vote
2answers
63 views
where I can find ground? [closed]
there is AVR AVR ATmega32 and a board within.
there is outputs for all ports (A, B, C, D) on board, and Vcc.
the problem is - I have no external GND output.
to watch current - I should search for ...
0
votes
1answer
144 views
How to upload Arduino sketches to Atmel chips
I am new in this Arduino coding world and I was trying to make a project. I normally used Arduino Unos all the time, but I was facing a problem and that is that the Arduino Uno has only 13 digital ...
2
votes
1answer
41 views
In UART, what mechanism sets the “new data received” flag back to 0?
I was reading documentation on UART on AVR and it looks simple: when a flag (bit RXC0 of register UCSR0A) is set to 1, it means the micro controller has new data for you, and you read this from ...
1
vote
2answers
162 views
AVR - How to know that there is collision between stack and heap or the memory has filled?
I am using the dynamic memory in AVR microcontroller, so How to know that there is collision between stack and heap or if the memory has been filled?
2
votes
2answers
449 views
How to program AVR in Mac OS X?
In our college we are using a module developed by IIT Bombay (called FIREBIRD V[ver 5]). It has ATmega2560 and ATmega8 microcontrollers (master and slave) with bootloader.
The staff uses AVR Studio ...
2
votes
0answers
33 views
SPI Interface between Arduino UNO and EVK1100 [closed]
I'm using Arduino Uno board as master and AVR32UC3A0512 as slave. I've written code for arduino using SPI.h library, and Atmel Studio 6.2 using spi.h. I'm sending data from arduino to atmel i.e from ...
0
votes
0answers
46 views
Arduino (or Breadboarduino) as I2C slave
I have a somewhat complex setup in which a number of sensors are queried, their results processed and then displayed. For various reasons, I don't want all of this to happen on a single 'duino. So I ...
1
vote
1answer
177 views
Why does my Arduino keep waking up?
This is my first post. Please excuse me if this is a repost, but I couldn't find a similar question via search.
I have some experience with Arduino and I'm looking to utilize AVR's sleep mode in a ...
0
votes
3answers
185 views
How to check if a pin is set from bank?
How would you go about checking if an input pin has been set using the entire bank? I am thinking that I need to use bit twiddling with a bit mask but I have not used this enough to figure out how to ...
2
votes
2answers
282 views
Burning arduino generate hex file to blank atmel chip
Is it possible to burn the hex file to a blank chip, generated by Arduino to burn using USBASP to that particular chip without using Arduino board ? Will the program work ?
My main goal is to use ...
1
vote
1answer
100 views
Timer (or other) interrupt happens while servicing an interrupt - how to accurately handle the second one?
This seems like a simple question but I'm not finding an answer so far: at a high level, say I have a timer interrupt and some input interrupt. The input arrives, the ISR is entered, interrupts are (...
0
votes
1answer
93 views
Arduino W5100 AVR
I'm trying to use a W5100 Arduino Ethernet Shield on a ATMega2560 using avr code.
There exists a library written in C, which should work http://www.seanet.com/~karllunt/w5100_webserv.zip from http://...
2
votes
1answer
359 views
Atmega168 Watchdog timer
I'm trying to use the watchdog timer to prevent the atmel from being stuck in a loop.
Right now, I have the watchdog timer in System Reset Mode, with a 8sec timer. I reset the timer in every loop ...
