Buttons

Direct Button Reading

• buttons.read(gpio_num_t gpio) :

Button Names

• Enter
• Up
• Down
• Left
• Right
• LeftUp
• LeftDown
• RightUp
• RightDown

Example Usage

#include "Logic.hpp"
#include <iostream>

void logicMain() {
    while (true) {
        display.clear();

        if(buttons.read(Enter)) {
            display.drawSquareFilled(3, 3, 4, Rgb(255, 255, 255));
        }
        else if(buttons.read(Right)) {
            display.drawSquareFilled(6, 3, 4, Rgb(255, 255, 255));
        }
        else if(buttons.read(Down)) {
            display.drawSquareFilled(3, 6, 4, Rgb(255, 255, 255));
        }
        else if(buttons.read(Left)) {
            display.drawSquareFilled(0, 3, 4, Rgb(255, 255, 255));
        }
        else if(buttons.read(Up)) {
            display.drawSquareFilled(3, 0, 4, Rgb(255, 255, 255));
        }
        display.show(30);
    }
}

Event-based Button Handling

buttons.onChange

buttons.onChange([](std::bitset<MaxID> currentState, std::bitset<MaxID> buttonChange) {
    if (buttonChange[up] == 1) {

        std::cout << "Button Up has changed and is now ";

        if (currentState[Up] == 1) {
            std::cout << "pressed." << std::endl;
        } else {
            std::cout << "released." << std::endl;
        }
    }
});

buttons.onChange([](std::bitset<MaxID> currentState) {
    std::cout << "Button Up is now ";

    if (currentState[Up] == 1) {
        std::cout << "pressed." << std::endl;
    } else {
        std::cout << "released." << std::endl;
    }
});

buttons.onChange([]() {
        std::cout << "A button has changed. No more information available" << std::endl;
    });

buttons.onChange([](std::bitset<MaxID> currentState, std::bitset<MaxID> buttonChange) {
    std::cout << "You will see this only when Button Down changes, and the button is now ";

    if (currentState[Down] == 1) {
        std::cout << "pressed." << std::endl;
    } else {
        std::cout << "released." << std::endl;
    }
}, Down);

buttons.onChange([](bool isPressed) {
    std::cout << "You will see this only when Button Down changes" << std::endl;

    if (isPressed == 1) {
        std::cout << "pressed." << std::endl;
    } else {
        std::cout << "released." << std::endl;
    }
}, Down);


buttons.onChange([]() {
    std::cout << "You will see this only when Button Down changes" << std::endl;
}, Down);

buttons.onPress

buttons.onPress([](std::bitset<MaxID> currentState, std::bitset<MaxID> changed) {
    std::cout << "A button has been pressed. ";

    if (changed[Right] == 1) {
        std::cout << "It was the Right button" << std::endl;
    } else {
        std::cout << "It was not the Right button" << std::endl;
    }
});

buttons.onPress([](std::bitset<MaxID> currentState) {
    std::cout << "A button has been pressed. ";

    std::cout << "Buttons ";

    for(int i = 0; i < MaxID; i++) {
        if (currentState[i] == 1) {
            std::cout << i << ", ";
        }
    }

    std::cout << "are now pressed." << std::endl;
});

buttons.onPress([]() {
    std::cout << "A button has been pressed. No more information available" << std::endl;
});

buttons.onPress([]() {
    std::cout << "You will see this only when Button Left get pressed down." << std::endl;
}, Left);

buttons.onRelease

buttons.onRelease([](std::bitset<MaxID> currentState, std::bitset<MaxID> changed) {
    std::cout << "A button has been released. ";

    if (changed[Right] == 0) {
        std::cout << "It was the Right button" << std::endl;
    } else {
        std::cout << "It was not the Right button" << std::endl;
    }
});

buttons.onRelease([](std::bitset<MaxID> currentState) {
    std::cout << "A button has been released. ";

    std::cout << "Buttons ";

    for(int i = 0; i < MaxID; i++) {
        if (currentState[i] == 0) {
            std::cout << i << ", ";
        }
    }

    std::cout << "are now released." << std::endl;
});

buttons.onRelease([]() {
    std::cout << "A button has been released. No more information available" << std::endl;
});

buttons.onRelease([]() {
    std::cout << "You will see this only when Button Left gets released." << std::endl;
}, Left);