mirror of
https://github.com/esphome/esphome.git
synced 2024-12-02 19:54:14 +01:00
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
#include "pulse_meter_sensor.h"
|
|
#include "esphome/core/log.h"
|
|
|
|
namespace esphome {
|
|
namespace pulse_meter {
|
|
|
|
static const char *const TAG = "pulse_meter";
|
|
|
|
void PulseMeterSensor::setup() {
|
|
this->pin_->setup();
|
|
this->isr_pin_ = pin_->to_isr();
|
|
this->pin_->attach_interrupt(PulseMeterSensor::gpio_intr, this, CHANGE);
|
|
|
|
this->last_detected_edge_us_ = 0;
|
|
this->last_valid_edge_us_ = 0;
|
|
}
|
|
|
|
void PulseMeterSensor::loop() {
|
|
const uint32_t now = micros();
|
|
|
|
// If we've exceeded our timeout interval without receiving any pulses, assume 0 pulses/min until
|
|
// we get at least two valid pulses.
|
|
const uint32_t time_since_valid_edge_us = now - this->last_valid_edge_us_;
|
|
if ((this->last_valid_edge_us_ != 0) && (time_since_valid_edge_us > this->timeout_us_)) {
|
|
ESP_LOGD(TAG, "No pulse detected for %us, assuming 0 pulses/min", time_since_valid_edge_us / 1000000);
|
|
this->last_valid_edge_us_ = 0;
|
|
this->pulse_width_us_ = 0;
|
|
}
|
|
|
|
// We quantize our pulse widths to 1 ms to avoid unnecessary jitter
|
|
const uint32_t pulse_width_ms = this->pulse_width_us_ / 1000;
|
|
if (this->pulse_width_dedupe_.next(pulse_width_ms)) {
|
|
if (pulse_width_ms == 0) {
|
|
// Treat 0 pulse width as 0 pulses/min (normally because we've not detected any pulses for a while)
|
|
this->publish_state(0);
|
|
} else {
|
|
// Calculate pulses/min from the pulse width in ms
|
|
this->publish_state((60.0 * 1000.0) / pulse_width_ms);
|
|
}
|
|
}
|
|
|
|
if (this->total_sensor_ != nullptr) {
|
|
const uint32_t total = this->total_pulses_;
|
|
if (this->total_dedupe_.next(total)) {
|
|
this->total_sensor_->publish_state(total);
|
|
}
|
|
}
|
|
}
|
|
|
|
void PulseMeterSensor::set_total_pulses(uint32_t pulses) { this->total_pulses_ = pulses; }
|
|
|
|
void PulseMeterSensor::dump_config() {
|
|
LOG_SENSOR("", "Pulse Meter", this);
|
|
LOG_PIN(" Pin: ", this->pin_);
|
|
ESP_LOGCONFIG(TAG, " Filtering pulses shorter than %u µs", this->filter_us_);
|
|
ESP_LOGCONFIG(TAG, " Assuming 0 pulses/min after not receiving a pulse for %us", this->timeout_us_ / 1000000);
|
|
}
|
|
|
|
void ICACHE_RAM_ATTR PulseMeterSensor::gpio_intr(PulseMeterSensor *sensor) {
|
|
// This is an interrupt handler - we can't call any virtual method from this method
|
|
|
|
// Get the current time before we do anything else so the measurements are consistent
|
|
const uint32_t now = micros();
|
|
|
|
// We only look at rising edges
|
|
if (!sensor->isr_pin_->digital_read()) {
|
|
return;
|
|
}
|
|
|
|
// Check to see if we should filter this edge out
|
|
if ((now - sensor->last_detected_edge_us_) >= sensor->filter_us_) {
|
|
// Don't measure the first valid pulse (we need at least two pulses to measure the width)
|
|
if (sensor->last_valid_edge_us_ != 0) {
|
|
sensor->pulse_width_us_ = (now - sensor->last_valid_edge_us_);
|
|
}
|
|
|
|
sensor->total_pulses_++;
|
|
sensor->last_valid_edge_us_ = now;
|
|
}
|
|
|
|
sensor->last_detected_edge_us_ = now;
|
|
}
|
|
|
|
} // namespace pulse_meter
|
|
} // namespace esphome
|