Questions tagged [class]
A custom structure in C++ (and various other languages) which can contain member data and functions. An instance of a class is called an object.
122 questions
0
votes
0
answers
147
views
Initializing both I2C devices of a RP2040 Rpi Pico with Earle Philhower Core
I'm using the Arduino IDE (v1.8.19) with the Earle Philhower core to program a Raspberry Pi Pico (RP2040) board.
I2C bus 0 of the Pico (pins 4 (SDA) and 5 (SCL) are coupled to a first MCP23017 port ...
- 1
-1
votes
1
answer
113
views
Class private variable values not accessible in public function
I'm experimenting with classes in Arduino code. I have the following small code snippet:
#include "Motor.h"
#include "Arduino.h"
Motor::Motor()
{
}
void Motor::Configure(...
- 3,391
2
votes
1
answer
135
views
How to pass Encoder object to constructor of a different class
I am trying to create a class (Arm) that controls an arm. The arms have 2 motors, each with an encoder, so I pass 4 integers for the pins and I am trying to pass 2 pointers (one for each encoder ...
- 634
1
vote
1
answer
3k
views
Invalid use of non-static member function
In order to explain my problem I used 3 classes: Actions, Triggers, and Combine.
Actions simulates an action function, that is defined externally.
Triggers has that function that needed to be executed....
- 18.3k
1
vote
0
answers
305
views
Using library functions in timer ISR ESP32
I'm trying to use a library function in my ISR function that uses the internal timer to trigger every 1 ms. The chip that I'm using is an ESP32-C3-MINI. Here is my current code:
main.cpp
#include <...
- 111
1
vote
1
answer
96
views
Cannot instantiate a parameterized object inside of another class
I'm having troubles understanding the inner workings of classes and such.
I have a class called Attributes that contains parameters. In my .ino, I can simply instantiate an object with Attributes ...
- 18.3k
1
vote
4
answers
1k
views
Instances of a class inside another class - is there a way to control the amount?
I have a class with 12 instances of a button, to create a keypad( meaning that this is the only case I use 12 instances). But this class can be just a button array of any other number between 1-12. I'...
- 18.3k
-1
votes
1
answer
364
views
How to pass Strem object to my class
I'm trying to creaper class wraper to use an Streamobject but I've an error when I try to compile.
My .hfile :
#include <Arduino.h>
class TestSerialListener {
public:
TestSerialListener(...
- 16.6k
1
vote
1
answer
152
views
How do I properly use an ISR inside a class definition?
I want to write a class for a model bike.
For controlling the steering I use a DC motor with two encoders.
To get the steering angle stAng of the bike, I attach a interrupt to the pin ST_ENC_A where ...
- 45.2k
-1
votes
2
answers
1k
views
How to properly put a u8g2 handle in a class
I'm trying to create a small battery powered alarm clock using an Arduino MKRZero and a generic SH1106-controlled, 128x64 pixel oled.
I started out just dumping all code into a single file named Clock....
CommunityBot
- 1
3
votes
2
answers
3k
views
Attach the Arduino ISR function to the class member
I intended to use a timer interrupt for limited instances of a class in my ESP32 Arduino project. My first code conception was as follows:
portEXIT_CRITICAL_ISR(&lock0);
}
...
- 174
1
vote
2
answers
2k
views
Call functions of one class from another class - Callback
I am new to C++ & I need to call functions of one class from another class. And so that the classes do not know anything about each other. How to do it in Arduino environment?
class Encoder {
...
- 27
2
votes
1
answer
2k
views
AttachInterrupt - fail to initiate inside a class [duplicate]
I'm trying to create a class that uses attachInterrupt, but get this error msg:
In member function 'void ledDoor::attach()':
ClosetLedStrip:31:82: error: invalid use of non-static member function
...
- 174
0
votes
1
answer
150
views
How does a callback function get revoke itself eg. Connect function get revoked when there is new connection
Further to my previous question here
Can anyone help me understand how the callback function gets revoked itself? The connect function, disconnect function.
BLE custom UUID code source here
Another ...
- 106k
0
votes
1
answer
100
views
Failure using references variables in classes [closed]
Theoretical Q
I'm having some trouble when using a referenced variable in a class.
Class A have an int a=0. Class B has an instance of Class A, and referencing int &a=A.a, and in the same manner ...
- 1,049