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58 lines
2.3 KiB
C++
58 lines
2.3 KiB
C++
#pragma once
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#ifdef USE_ESP32
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#include "esphome/core/hal.h"
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#include <driver/gpio.h>
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namespace esphome {
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namespace esp32 {
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// Static assertions to ensure our bit-packed fields can hold the enum values
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static_assert(GPIO_NUM_MAX <= 256, "gpio_num_t has too many values for uint8_t");
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static_assert(GPIO_DRIVE_CAP_MAX <= 4, "gpio_drive_cap_t has too many values for 2-bit field");
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class ESP32InternalGPIOPin : public InternalGPIOPin {
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public:
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void set_pin(gpio_num_t pin) { this->pin_ = static_cast<uint8_t>(pin); }
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void set_inverted(bool inverted) { this->pin_flags_.inverted = inverted; }
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void set_drive_strength(gpio_drive_cap_t drive_strength) {
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this->pin_flags_.drive_strength = static_cast<uint8_t>(drive_strength);
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}
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void set_flags(gpio::Flags flags) { this->flags_ = flags; }
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void setup() override;
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void pin_mode(gpio::Flags flags) override;
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bool digital_read() override;
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void digital_write(bool value) override;
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std::string dump_summary() const override;
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void detach_interrupt() const override;
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ISRInternalGPIOPin to_isr() const override;
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uint8_t get_pin() const override { return this->pin_; }
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gpio::Flags get_flags() const override { return this->flags_; }
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bool is_inverted() const override { return this->pin_flags_.inverted; }
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gpio_num_t get_pin_num() const { return static_cast<gpio_num_t>(this->pin_); }
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gpio_drive_cap_t get_drive_strength() const { return static_cast<gpio_drive_cap_t>(this->pin_flags_.drive_strength); }
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protected:
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void attach_interrupt(void (*func)(void *), void *arg, gpio::InterruptType type) const override;
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// Memory layout: 8 bytes total on 32-bit systems
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// - 3 bytes for members below
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// - 1 byte padding for alignment
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// - 4 bytes for vtable pointer
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uint8_t pin_; // GPIO pin number (0-255, actual max ~54 on ESP32)
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gpio::Flags flags_; // GPIO flags (1 byte)
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struct PinFlags {
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uint8_t inverted : 1; // Invert pin logic (1 bit)
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uint8_t drive_strength : 2; // Drive strength 0-3 (2 bits)
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uint8_t reserved : 5; // Reserved for future use (5 bits)
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} pin_flags_; // Total: 1 byte
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// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
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static bool isr_service_installed;
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};
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} // namespace esp32
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} // namespace esphome
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#endif // USE_ESP32
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