Questions tagged [avr-gcc]
AVR-GCC is a compiler that takes C language high level code and creates a binary source which can be uploaded into an AVR micro controller.
68 questions
13
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2
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Will a .ino Arduino Sketch compile directly on GCC-AVR?
Okay, we all have seen those questions all over the web such as Arduino v.s. C++, or other similar questions. And a vast majority of the answers do not even touch compilation differences other than ...
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1
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Why does the use of serial.readBytes increase program size by 10kb?
If I put this in my arduino program, in main.cpp, I suddenly run out of memory for flash program size:
if(msgSize > 2) {
//sr::sequentialRead(&serialRead, newTram.hash);
uint8_t bytes[...
- 340
-1
votes
1
answer
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avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
I'm working on a linux machine with avrdude and avrgcc. NOT using Arduino IDE.
I'm using Arduino Nano 33 SENSE REV2 BLE, trying to upload a sample blink .c program and getting this error.
This is the ...
- 251
2
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2
answers
2k
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Own type definition using a struct does not name a type
I need to initialize several buttons and LEDs connected to my Arduino. To store data related to an individual button or LED, I decided to define my own data type using two different structs. One for a ...
- 45.2k
0
votes
1
answer
179
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How to run avr-gcov on a .ino sketch file
I am new to Arduino and gcov. I have a .ino sketch file, avr-gcov, and avr-gcc from Arduino library in the same directory. Could someone guide me to the steps I should take to run avr-gcov on my .ino ...
- 2,466
2
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0
answers
193
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TFT Screen with Arduino UNO does not display as expected
I have a 3.5" TFT LCD communicating in parallel connected to Arduino UNO.
I expect it draws a white circle on a black background but all it does is to show a white screen.
How to fix this?
main.c
...
- 173
0
votes
2
answers
318
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slower clock frequency than expected on attiny202
I am programming an attiny202 which as per datasheet can run up to 20Mhz, but after compiling/uploading this simple code to the attiny202 and watch the PA2 pin on the oscilloscope, I see that the pin ...
- 45.2k
1
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1
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386
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How do I build and upload a C++ program without the Arduino Library or IDE?
Note: This is a reference question (but feel free to write answers of your own!)
I want to use the AVR tools directly -- no arduino-builder or arduino-cli. I would also like compilation and uploading ...
- 317
0
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1
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Do I need to use resisters and ICes for specific sensors.What if I dont use it,Will it impact my arduino board some how like making it useless &faulty
So I was reading about Simple AutomaticLight Controller using LDR. or with the help of LDRSenso. But I have LM393 Photoresistor (LDR) Sensor I like to know are they same thing or somewhat different. ...
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How to pass non-static class member to callback on avr platforms?
I am using the PubSubClient library in my own Arduino library. I'm having trouble with trying to assign a class member as the client library setCallback callback function.
MyClass.cpp:
#include <...
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1
vote
1
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Why do I have to burn the code to make it run? [closed]
Why do I have to burn the code twice to actually burn it on to the Arduino board? I have to execute this command twice - only then is the chip getting programmed.
I'm using this command to burn the ...
- 3,152
1
vote
2
answers
122
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Weird assembly output
I was taking a look at the disassembly for a loop of mine that seemed to be taking too long and I found these assembly instructions that I don't understand. Why does it load 0 into r25 and then do two ...
1
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1
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204
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Why my arduino board does not blink properly?
I have two files
blink1.cpp
typedef unsigned char int8_t;
typedef volatile int8_t * volatile port_type;
port_type portB = (port_type) 0x25;
port_type ddrB = (port_type) 0x24;
void delay_500ms()
{
...
- 45.2k
1
vote
1
answer
2k
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AVRdude does not read the FUSE byte values correctly
I am exploring the ATmega328p MCU via a standard Arduino UNO, with the help of avr-gcc toolchain and AVRdude (All in the WINAVR package). I have successfully programmed the board a few times with it. ...
- 5,739
11
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2
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Understanding the compilation/linking/upload process (so I don't have to use the IDE)
I have started to play with and arduino UNO quite recently (without any prior experience with micro-controllers). I would like to use emacs instead of the IDE, and I'd also like to know what the IDE ...
- 111
0
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3
answers
3k
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DigiSpark AT Tiny85 compile problem?
Friend asked me to find problem with compilation for his DigiSpark AT Tiny85 board.
We are trying to compile sketch from here:
https://forum.arduino.cc/index.php?topic=314773.0
But with no luck - ...
- 11
2
votes
3
answers
539
views
How can I control blinking of LED while in timer function?
When I am in the 30-second standby function, I want to turn the LED on and off at 5-second intervals.
How can I do what I want using the read_counter() function?
The problem here is that I am already ...
0
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1
answer
2k
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Timer0 overflow interrupt not working
I try to use the Timer0 of an Arduino Leonardo (ATmega32u) to trigger an interrupt at regular intervals, using plain avr-gcc (not the arduino library). I try to blink the built-in LED as test, but it ...
CommunityBot
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1
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Interleave disassembly + source with avr-objdump
I have a C program for the attiny85, that I want to disassemble and display with interleaved source code.
Here's my program:
test.c
#include <avr/io.h>
int main() {
for(int i=0; i<100; ...
- 45.2k
1
vote
2
answers
111
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Gratuitious instantiation of `Serial`, why?
Let's take a very simple sketch, any simple one-.ino sketch. Say, just a led blinker like this
void setup()
{
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, LOW);
}
void loop()
{
...
- 2,514
1
vote
1
answer
553
views
Reading port register and print
I am playing with port registers directly to improve speed on a Arduino micro. I have no problem writing them, like
PORTF &= B11101111
However, when I try to read and print it, things get funny ...
- 2,514
1
vote
1
answer
201
views
Compiling Error
I am trying to compile this code on arduino IDE...It showing error
code is
#include <IRremote.h>
int RECV_PIN = 6;
int led = 12;//1FE50AF
int led1 = 10;//1FED827
int led2 = 9; //1FEF807
int ...
- 2,514
0
votes
2
answers
94
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Atmega collecting and relaying interrupt calls
I like to collect all possible interrupt and relay them to an alternative handler interrupt table what the user can set.
In order to do this i have to:
1) collect all/any interrup request
2) ...
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1
vote
1
answer
1k
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Melzi 2.0 Board Firmware Upload problem
I'm trying to flash the repetier Firmware to my Prusa i3 3D Printer, which uses Melzi 2.0 board. I uploaded it successfully 2 days ago with same settings but now is failing always.
@avrdude -p ...
- 2,514
0
votes
1
answer
293
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Running Arduino code for Bluefruit LE on bare ATMega328
I need to hook up Bluefruit LE Breakout (nRF8001-based) to ATMega328 chip (to use it as wireless UART), and it seems like the library provided is for Arduino.
What I have is just bare ATMega328 (note ...
- 2,514
1
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0
answers
157
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Bootloader fails when two Arduinos are connected over serial port
I’d like to connect two Arduinos over serial port so that they can communicate with each other. Initially, I put all necessary code onto one device and now connected another via serial port. As soon ...
- 2,514
2
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2
answers
138
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Weird behavior (Couldn't pull the pin LOW)
I was trying to implement my own code to control a stepper motor on arduino uno, however I noticed that the pins were always HIGH despite what was written to them. I started to erase the code to leave ...
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-1
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1
answer
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Error compiling code for Arduino/Genuino Uno
Arduino: 1.8.6 Hourly Build 2017/10/20 02:33 (Windows 10), Board:
"Arduino/Genuino Uno"
c:\users\hp\desktop\arduino-nightly\hardware\tools\avr\bin../lib/gcc/avr/4.9.2/../../../../avr/bin/ar.exe:...
- 2,514
1
vote
2
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Why does my Arduino IDE hang/crash so often?
I've traditionally used a text editor with avr-gcc and makefiles for working with Arduino boards. I'm now trying to develop projects for the wider Arduino user-base, so I am trying to use the Arduino ...
- 2,514
10
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1
answer
4k
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Setting timer3 in CTC mode - conflict with servo library
I would like to set up a timer in order to call a function 800 times per second. I'm using the Arduino Mega and Timer3 with a prescaler of 1024. To choose the prescaler factor I've considered the ...
- 2,514
21
votes
2
answers
13k
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Would an infinite loop inside loop() perform faster?
When you're writing a typical sketch, you usually rely on loop() being called repeatedly for as long as the Arduino is running. Moving in and out of the loop() function must introduce a small overhead ...
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1
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2
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490
views
New Language - Interfacing with AVR
So I'm taking a class where the project is to create a new embedded language. We are using OCaml for the compiler, so I was looking for a way to interface with AVR or its C library in such a way as I ...
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2
votes
3
answers
2k
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Compiling code via terminal
How can I compile my code via terminal? I am working on a Chrome app that allows you to write, compile, and upload code to an Arduino, and I need to know this so I can use the command line compiler on ...
- 851
2
votes
2
answers
917
views
Passing arguments to LCD.print through another function
I'd like to write a function like this:
void lcdPositionPrint(int row, int col, content) {
lcdPosition(row, col);
LCD.print(content);
}
but I'm not certain how to declare "content", because ...
- 2,514
1
vote
1
answer
2k
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undefined reference to `PPMintIn::PPMintIn(int)'
I am making a new library that will utilize PinChangeInt's library.
My intention is to further simplify repetitive code by creating a library. (This is to allow for multiple PPM channels without ...
- 2,514
9
votes
3
answers
3k
views
How to write makefile-compatible sketches?
I'd like to write my sketches so that I can either build/upload them using the Arduino IDE, or optionally using GCC and a makefile.
I know about including the function declarations at the top, but is ...
- 2,514
1
vote
0
answers
88
views
Error Compiling any coding in Arduino IDE
I was using the example code of "Blink", and when I try to compile it, it pop out an error as below.
I tried to:
uninstall and installed back the Arduino IDE
installed different versions of Arduino ...
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2
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0
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1k
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Cannot program Mega2560 using Atmel Studio 6.2 and avrdude
So I will admit that I am a noob to Arduino. I have some experience programming microcontrollers, and that was back in the day (about 4 years ago - such as the Freescale 68HC12) so up until this point ...
- 2,514
2
votes
1
answer
814
views
Compilation error using arduino-mk on arch Linux (undefined reference to __dso_handle)
I'm compiling a simple sketch that reads values from an analog input
and activates a buzzer on a digital input.
working on an Arduino uno.
the sketch compiles and runs fine on windows and arch linux ...
- 2,514
2
votes
1
answer
1k
views
programming arduino in pure c
I'm trying to flash pure c-code to arduino Mega2560 board from linux using avr-gcc & avrdude. Compilation is done , now trying to flash using avr-dude, getting error as "avrdude: stk500_recv(): ...
- 2,514
4
votes
1
answer
10k
views
Does ATMega 328/2560 chips support JTAG-type programmer and hardware debugger?
As stated in www.Arduino.cc FAQ, "Can I use an Arduino board without the Arduino software? Sure. It's just an AVR development board, you can use straight AVR C or C++ (with avr-gcc and avrdude or AVR ...
- 2,514
5
votes
2
answers
184
views
Trouble with Timer 0
I'm taking my first wobbly steps outside the Arduino IDE and I'm not having much success with timers / interrupts. I can set a pin to output and light an LED with registers fine but I cannot for the ...
- 2,514
5
votes
4
answers
241
views
Where in datasheet is the warning about unreliability of reading PINxn?
I use atmega32u4 (but believe it applies to all models). Here is the datasheet.
Consider the following C program (I use AVR-GCC 5.4.0):
#include <avr/io.h>
int main(void)
{
PORTB |= 1 <&...
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votes
1
answer
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What are the benfits of global variables over static class members?
On an embedded system we use global variables often to keep dynamic memory consumption on heap and stack low. But global variables are also considered bad programming practice if they aren't used in a ...
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0
votes
3
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294
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Why atmega168/328p starts to reset?
First we set fuse bits:
avrdude -c usbasp -p atmega328p -U lfuse:w:0xFF:m -U hfuse:w:0xDF:m -U efuse:w:0x07:m # same for atmega168
In the following examples we use the following commands to compile ...
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0
votes
1
answer
289
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C++ State Machine / Wpmf-convesion
I'm quite a newbie using C ++. I am trying to implement in C ++, the state machine described in this link for C language:
https://barrgroup.com/Embedded-Systems/How-To/Coding-State-Machines.
I have ...
- 2,514
0
votes
1
answer
915
views
UECIDE: linker error with U8g2 library
This sketch:
#include <SPI.h>
#include <Wire.h>
#include <U8g2lib.h>
// OLED display.
U8G2_SSD1306_128X64_NONAME_1_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);
void setup()...
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0
votes
1
answer
2k
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Why serial communication does not work on atmega168/328p?
I expect from the following program serial.c to light the led on if I send key 1 from terminal, and light the led off when I send key 0 from terminal:
#define F_CPU 16000000UL
#define BAUD 9600
#...
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-1
votes
3
answers
1k
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avrdude flash issues
I want to burn a hex file to a custom ATmega2560 board. I use this USBasp programmer for flashing (firmware version 1.01) on my Mac OS X 10.12.6 system. All hex files are compiled with avr-gcc (GCC) 4....
- 2,514
1
vote
0
answers
301
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AVR-Toolchain for Arduino crashes on Mac OSX 10.11.6: Hints or debugging help needed
My Arduino IDE does not compile any project since I updated from Mac OSX 10.6.8 to 10.11.6.
I even tried reinstalling and also manually installing the original AVR-toolchain. But the behaviour did ...
- 2,514