Questions tagged [compiler]
A compiler converts source code (C++, Java, etc) to machine code which is what the CPU runs.
38 questions
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Unnecessary recompille after connection error
I sometimes multitask during a large compile (wifi, etc libraries) and don't get back in time to press the ESP32 upload button. If the connection times out, the IDE recompiles all the source again. ...
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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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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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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 ...
- 106k
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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 ...
CommunityBot
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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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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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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 ...
CommunityBot
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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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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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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 ...
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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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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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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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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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