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47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
#pragma once
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#include "esphome/core/component.h"
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#include "esphome/core/gpio.h"
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#include "esphome/components/sensor/sensor.h"
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#include <cinttypes>
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namespace esphome {
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namespace ultrasonic {
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class UltrasonicSensorComponent : public sensor::Sensor, public PollingComponent {
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public:
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void set_trigger_pin(GPIOPin *trigger_pin) { trigger_pin_ = trigger_pin; }
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void set_echo_pin(InternalGPIOPin *echo_pin) { echo_pin_ = echo_pin; }
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/// Set the timeout for waiting for the echo in µs.
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void set_timeout_us(uint32_t timeout_us);
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// ========== INTERNAL METHODS ==========
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// (In most use cases you won't need these)
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/// Set up pins and register interval.
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void setup() override;
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void dump_config() override;
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void update() override;
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float get_setup_priority() const override;
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/// Set the time in µs the trigger pin should be enabled for in µs, defaults to 10µs (for HC-SR04)
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void set_pulse_time_us(uint32_t pulse_time_us);
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protected:
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/// Helper function to convert the specified echo duration in µs to meters.
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static float us_to_m(uint32_t us);
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/// Helper function to convert the specified distance in meters to the echo duration in µs.
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GPIOPin *trigger_pin_;
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InternalGPIOPin *echo_pin_;
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ISRInternalGPIOPin echo_isr_;
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uint32_t timeout_us_{}; /// 2 meters.
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uint32_t pulse_time_us_{};
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};
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} // namespace ultrasonic
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} // namespace esphome
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