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.

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Error downloading arduino:avr:1.8.6 in Arduino IDE with Network Proxy

With Arduino IDE v2.2.1, I've connected Arduino UNO board and it automatically tries download the avr board - however it repeatedly throws errors while downloading the boards. As the PC that I'm ...
Giri's user avatar
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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 ...
Md Jabir Hossain's user avatar
2 votes
0 answers
89 views

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 ...
ar2015's user avatar
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2 answers
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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 ...
Joe Cabezas's user avatar
1 vote
1 answer
222 views

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 ...
glibg10b's user avatar
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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. ...
user786's user avatar
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790 views

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 <...
Hemant Bhargava's user avatar
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1 answer
76 views

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 ...
user137442's user avatar
1 vote
1 answer
185 views

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() { ...
ar2015's user avatar
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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. ...
Kraken's user avatar
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3 answers
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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 ...
harun caliskanoglu's user avatar
2 votes
2 answers
2k views

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 ...
albert's user avatar
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1 answer
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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; ...
Timo's user avatar
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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 ...
Anubhav's user avatar
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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() { ...
AnT stands with Russia's user avatar
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1 answer
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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 ...
Jason M's user avatar
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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 ...
ezeg's user avatar
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0 answers
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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 ...
Edward Khor's user avatar
1 vote
1 answer
1k views

Error Compiling sketch for Arduino Uno(ld return 1)

I have got an telnet server with esp8266 + SoftwareSerial+ UNO, and here I want to on led with command ON . will be 1 or 2. It is for recive 1 or 2 numbered pins. And I extract pin from request with ...
TheGamerCoder's user avatar
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74 views

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) ...
Dankó Dávid's user avatar
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3 answers
3k views

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 - ...
Jan's user avatar
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AVR-GCC can't call function located on fixed address

I wrote the following code: #include <avr/io.h> __attribute__((noinline, section(".app_start"))) void app_start() //app_start section starts at 0xFA0 { //register_packet_dispatch(...
Dankó Dávid's user avatar
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749 views

compilation error when changing variable from char to String

I have a code with these two lines: char handshakecode = "S"; // Capital S char receive; The lines of code are placed in a separate void, and not setup or loop. When i change the two variables ...
Stefan Bahrawy's user avatar
2 votes
2 answers
102 views

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 ...
Anthropomorphous Dodecahedron's user avatar
5 votes
4 answers
210 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 <&...
Igor Liferenko's user avatar
1 vote
1 answer
5k views

How would I include Arduino libraries using AVR-gcc without the IDE?

I am writing my own code for the Arduino Uno. I compile my code with AVR-gcc, and then upload it with AVRdude. I am not using the Arduino software, but I do have it installed and working on my PC. I ...
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1 answer
2k views

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 ...
Simon Tagne's user avatar
2 votes
1 answer
295 views

How does the build process in Arduino IDE work for ESP8266

How does the build process for esp8266 work in arduino IDE. Arduino ide uses avr-gcc to compile programs For atmel micro controllers. Does it uses same for compiling programs for esp8266?
B45i's user avatar
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avr/io.h No such file or directory error when compiling using avr-gcc

I am trying to use the atmega328p as standalone microchip and program it. I ama using an Arduino Uno as ISP. I have written a simple program to test it however when I try to compile it using avr-gcc ...
404response's user avatar
1 vote
0 answers
253 views

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 ...
Georg W.'s user avatar
  • 111
-1 votes
3 answers
881 views

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....
jblaze's user avatar
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1 vote
0 answers
143 views

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 ...
zmechanic's user avatar
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-1 votes
1 answer
26k views

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:...
dragonwarrior's user avatar
1 vote
2 answers
918 views

Building mocoLUFA under OSX & Linux

I am attempting to build mocoLUFA under OS X el Capitan 10.11.6. [Editor: mocoLUFA (MIDI firmware for Arduino Uno)] I am using the specified LUFA version (LUFA101122) and I have tried building with ...
Mark's user avatar
  • 133
0 votes
1 answer
793 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()...
user avatar
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(): ...
sankar's user avatar
  • 93
2 votes
3 answers
2k views

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 ...
Jordan Baron's user avatar
1 vote
1 answer
1k views

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 ...
Regtoy's user avatar
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1 vote
1 answer
949 views

Volatile variable not updating from timer ISR

I know this is a problem that has come up many times but I can't seem to get this code fragment to update the count variable on an ATMEGA328P. I am using an Arduino Uno as a development board, with ...
user avatar
1 vote
1 answer
188 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 ...
Prayuktibid's user avatar
1 vote
1 answer
191 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&...
user840250's user avatar
1 vote
1 answer
233 views

How to detect Genuino 101 from inside the code?

I am using a custom library for Arduino Mega which uses AES library for AES-128 encryption. However, when I try to use that library in Intel Genuino 101 development board, it shows compilation error ...
goddland_16's user avatar
12 votes
2 answers
11k views

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 ...
RedDogAlpha's user avatar
2 votes
2 answers
6k 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 ...
Ehryk's user avatar
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2 votes
1 answer
764 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 ...
NivPgir's user avatar
  • 23
5 votes
2 answers
159 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 ...
Ashlyn Black's user avatar
0 votes
3 answers
242 views

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 ...
Igor Liferenko's user avatar
0 votes
1 answer
2k views

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 #...
Igor Liferenko's user avatar
1 vote
2 answers
527 views

Question about include statements and details in Arduino.h file from core library

This is more of a C/C++ question. However the files I am asking about are a part of the Arduino library. In /arduino-1.6.5-r5/hardware/arduino/avr/cores/arduino/Arduino.h : #ifndef Arduino_h #...
wgwz's user avatar
  • 149
0 votes
1 answer
269 views

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 ...
Roman Susi's user avatar