Questions tagged [compiler]
A compiler converts source code (C++, Java, etc) to machine code which is what the CPU runs.
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Is there a constant for the Maximum Unsigned Long value in an Arduino compiler?
I am writing a timer function that uses the micros() function which generates a unsigned long value. To compensate for a roll over condition, I would like to use the maximum value for that variable ...
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Using Arduino as a standalone compiler
I mostly program in C/C++ so I conviniently have a GCC compiler for all my compilations. I was wondering if there is a special compiler for Arduino that can be used just like the GCC Compiler? Because ...
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Multiple definition of "..." Compiler Error
I am creating a simple library to test how multiple files in an Arduino program works. I have three files. MotorController.ino:
#include <motor.h>
void setup() {
motorInitialize();
}
void ...
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Does the compiled binary of a sketch include uncalled functions from a library?
I am writing a GUI using a TFT display and the Adafruit GFX library and its default font on Arduino Nano.
I want to be memory efficient and I assumed that the 'optimise for size' default setting of ...
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Compiling error:passing as 'this' argument
I am trying to make a small keyboard class to handle two buttons(in the future >2) that are connected to my arduino UNO. The buttons being pressed are detected using interrupts. Here is the code:
...
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Arduino IDE c++ 11 raw string literal have issues with // in http://, complier thinks // is comment
char webpage[] PROGMEM = R"=====(
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/svg.js/2.6.6/svg.min.js"></script>
</head>
<body>
&...
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What is the Arduino compiler's version of `__unused` for function parameters?
When I first started with the Arduino environment I noticed that it had File | Preferences | Compiler Warnings set to None, so I set it to All - and there were many, many warnings in the supplied ...
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How to make the compiler ensure that local variables memory allocation won't cause any RAM overflow during execution?
Upon compiling a sketch using the Arduino IDE, a message like the following gets displayed in the console:
Global variables use 1540 bytes (75%) of dynamic memory, leaving 508 bytes for local ...
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1
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ld.exe:linker_script.ld:138 cannot move location counter backwards | ArduinoFFT Error
Board: Arduino Nano 33 BLE Sense
I'm pulling PCM data from an onboard microphone and running it through the arduinoFFT library (version 1.5.6) to obtain a spectrogram. Since the arduinoFFT library ...
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Arduino IDE - scope of the pre-processor "#define"
I'm creating an Arduino library and have 3 files - a "test.ino" program, and two library/class files: "testLibrary.h" and a "testLibrary.cpp".
The library makes use of ...
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Arduino constant vs Microchip PIC constant
2.2 THE BASICS OF C PROGRAMMING LANGUAGE book is has like this,
CONSTANTS
A constant is a number or a character having fixed value that cannot be changed during program execution. Unlike variables, ...
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Why are some letters reserved?
I wrote a function that takes characters and noticed that the Arduino Compiler treated some characters like system-reserved, and other like functions, and a few just like characters. Lowercase doesn't ...
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Force compiler to execute instructions sequentially?
Is there a way to force the Arduino compiler to compile individual commands sequentially? Looking at the disassembly, lines of the assembly code for different C/Arduino commands are mixed. I was ...
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Compiler error: final link failed: bad value collect2.exe
I work With VS Code v:1.59.1.
With extension vscode-arduino v:0.4.4
befor update of vscode. in version 1.58. all was ok. I can build and upload code for all mucrocontrollers.
but after the update, I ...
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Runtime compilation
I want to compile a sketch on Arduino Uno, while Arduino is running and not connected to anything else, and then run the compiled sketch automatically.
Is this feasible?
How?
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Pass a char array to a function that uses File as parameter
I am in serious need for help here. I have a rather small function that get's the number of files from within a given directory. Now, the directory name (that is the path) is stored in a char array ...
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Duplicate libraries while compiling for ESP32 in the Arduino IDE
I have just added the ESP32 toolchain to the Arduino IDE (v1.8.0) on Windows 10. To get the IDE to allow me to select ESP32 chips I had to place the Espressif folder in "D:\Program Files(x86)\Arduino\...
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Compiling source with Arduino.h with avr-g++
How should I include the Arduino libraries when I'm compiling from the the command line? I tried to do it like this:
avr-g++ -g -Os -Wall -mcall-prologues -mmcu=atmega328p -fno-exceptions -o blink....
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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 ...
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0
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Can data be stored in program storage space instead of dynamic memory?
I'm declaring an array at top level like so:
constexpr byte a[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }; // whatever data
I'm referencing the array in such a way that it's not optimized away. When ...
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Error compiling to ESP32 using Arduino: Operand 2 of 'l32r' has out of range value
I was trying to follow this tutorial and ran into a problem compiling on the Arduino IDE with an ESP32 board. https://eloquentarduino.github.io/2019/12/how-to-do-gesture-identification-on-arduino/
I ...
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How to compile Arduino Framework with GNU
I'm wondering if it's possible to use GNU (g++) to compile a arduino Sketch.
I wanna be able to unit test my code with catch2.
g++ -std=c++11 <filename> works well with catch2, but I obviously ...
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0
answers
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default in switch doesn't appear to execute
I have a situation where the default case in my switch statement doesn't appear to execute as expected. I wonder if there is some subtlety I'm missing here?
Given the following enum:
enum ...
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Are there documented Arduino class or file name restrictions?
I ran into a strange problem were the compiler could not find a header file that I knew existed.
The problem was I created a class called ArduinoEvent and put it in ArduinoEvent.hpp, but when I ...
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0
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Using SlickEdit to compile Arduino files
I would like to compile my Arduino sketches in SlickEdit. I have turned on the verbose compile output in the standard IDE and I can see the compile and switches, but it doesn't appear that there is a ...
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1
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I swear this worked yesterday!! - mysterious compiler error
I thought I finally had this working yesterday, the code compiled, and executed on the arduino, there were however some small quirks but today I went to fix a small timing issue, but got the following ...
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Can't use uint16_t in library
I wonder why the following minimal example sketch doesn't compile (unknown type name 'uint16_t'):
sketch_does_not_compile.ino:
#include "myheader.h"
void setup() {
char a[]="hello ...
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Global array doesn't get assigned the space it would take up in memory
I have this sketch:
const uint32_t len = 65536;
uint8_t arr[len];
void setup() {}
void loop() {}
The length of the array should fit into the dynamic memory. However, when I compile the sketch it ...
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2
answers
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GCC msg "note: in definition of macro 'max'" error message
I'm using the ATtiny x5 series board, compiling my project (.cpp.ino file). Whenever I use the max(a,b) macro, I receive this message:
"C:\Documents and Settings\<user>\Local Settings\...
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Problems with compiling more then one sketch in the Arduino IDE
I found this ESP8266-MQTT program on Github.
How can I compile this thing with the Arduino IDE?
I only can open one sketch at a time. If I try to compile this then parts of the program are missing for ...
0
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1
answer
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Weird problem with arduino
I wrote the code below and the result is not what I expected at all! I'm not sure why it's happening!
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
}
const uint8_t ...
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1
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What is causing this 'narrowing conversion' warning?
Because I'm still figuring out 'Arduino C' I leave all warnings on.
Recently I got this one:
narrowing conversion of '(int)(((unsigned char)bx_0) | ((unsigned char)bx_1))' from 'int' to 'const byte.....
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Error Compiling to Board Teensy LC
I wrote a simple switch program using a teensy LC and transistors, but the Arduino compiler will not compile for the Teensy LC. And not for just my program, but any program, including the example ...
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smaller program bigger sketch
I'm working on a program composed by several classes.
I reduced the size of a single class of (more or less) one hundred lines (4kb of stuff)
I expected a smaller sketch but surprisingly it is ...
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1
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Getting "Undefined reference to vtable for {classname}
I have a large collection of libraries that compile correctly but won't link. I am using Visual Micro for Visual Studio 2015. Here is the complete collection of error messages:
CommandPattern3.cpp.o:...
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Removing the L from F_CPU in assembly
I am developing a mixed c++ /asm project.
In the asm I am using F_CPU to do some busy waiting as follows. However, by default, the F_CPU is defined with a trailing L (for long). The asm is not able to ...
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3
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Is there an open source compiler for Arduino Sketch codes?
I am working on a web app to program some nodeMCU devices that were flashed with the arduinoOTA library.
http://esp8266.github.io/Arduino/versions/2.0.0/doc/ota_updates/ota_updates.html
I tried the ...
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