Shadowtrance
dbf850c434
- M5 Unit Modules library + M5 Unit Test app - Minor fixes for TodoList, TwoEleven, Snake, Brainfuck and Breakout - Fixed SerialConsole to use the uart controller as it was broken in one of the many updates - Fixed keyboard input in TwoEleven, Breakout, Magic8Ball and Snake - Bluetooth Media Keys app, supports pressing physical keys to trigger the corresponding buttonmatrix button - Epub Reader app
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/*
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* UnitDualButton.h - M5Stack Dual Button Unit (GPIO, Port B)
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*
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* Two independent momentary push buttons connected to GPIO pins.
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* Buttons are active-low - pressing pulls the pin to GND.
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* Internal pull-up resistors are enabled by the driver.
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*
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* Typical Port B pin assignment (M5Stack Core2):
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* Button A (red) - GPIO 36
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* Button B (blue) - GPIO 26
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*
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* Usage:
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* UnitDualButton btn;
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* Device* gpioCtrl = device_find_by_name("gpio0");
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* if (btn.begin(gpioCtrl, 36, 26)) {
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* bool a = btn.isButtonAPressed();
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* bool b = btn.isButtonBPressed();
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* }
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* // When done: btn.end() or let destructor release pins
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*/
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#pragma once
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#include <tactility/device.h>
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#include <tactility/drivers/gpio_controller.h>
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#include <cstdint>
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class UnitDualButton {
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public:
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~UnitDualButton();
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UnitDualButton() = default;
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UnitDualButton(const UnitDualButton&) = delete;
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UnitDualButton& operator=(const UnitDualButton&) = delete;
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UnitDualButton(UnitDualButton&&) = delete;
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UnitDualButton& operator=(UnitDualButton&&) = delete;
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// Pass a GPIO controller device
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// Acquire and configure both GPIO pins as inputs with pull-up.
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// controller: GPIO controller device (e.g. device_find_by_name("gpio0"))
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// pinA / pinB: physical GPIO pin numbers
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bool begin(Device* controller, gpio_pin_t pinA, gpio_pin_t pinB);
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// Release GPIO descriptors. Safe to call multiple times.
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void end();
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bool isPresent() const { return ready_; }
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// True when button A is pressed (active-low: pin reads low).
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bool isButtonAPressed() const;
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// True when button B is pressed (active-low: pin reads low).
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bool isButtonBPressed() const;
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private:
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GpioDescriptor* descA_ = nullptr;
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GpioDescriptor* descB_ = nullptr;
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bool ready_ = false;
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static bool readPin(GpioDescriptor* desc);
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};
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