fb7e7eb80b
Co-authored-by: Michal Obrembski <michal@obrembski.com> Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
39 lines
937 B
C++
39 lines
937 B
C++
#pragma once
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#include <array>
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#include <cstdint>
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#include "esphome/core/hal.h"
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namespace esphome {
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namespace gpio_expander {
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/// @brief A class to cache the read state of a GPIO expander.
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template<typename T, T N> class CachedGpioExpander {
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public:
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bool digital_read(T pin) {
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if (!this->read_cache_invalidated_[pin]) {
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this->read_cache_invalidated_[pin] = true;
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return this->digital_read_cache(pin);
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}
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return this->digital_read_hw(pin);
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}
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void digital_write(T pin, bool value) { this->digital_write_hw(pin, value); }
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protected:
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virtual bool digital_read_hw(T pin) = 0;
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virtual bool digital_read_cache(T pin) = 0;
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virtual void digital_write_hw(T pin, bool value) = 0;
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void reset_pin_cache_() {
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for (T i = 0; i < N; i++) {
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this->read_cache_invalidated_[i] = false;
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}
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}
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std::array<bool, N> read_cache_invalidated_{};
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};
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} // namespace gpio_expander
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} // namespace esphome
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