mirror/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2026-03-03 11:18:21 -07:00
Code Issues Packages Projects Releases Wiki Activity

Make pulse_meter PULSE filter report the pulse as soon as it can (#6014)

Browse Source
This commit is contained in:
Trent Houliston
2024-05-08 08:13:15 +10:00
committed by GitHub
parent f6a3784eba
commit b545d57236
3 changed files with 121 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
esphome/components/pulse_meter/pulse_meter_sensor.cpp
View File

@@ -24,11 +24,16 @@ void PulseMeterSensor::setup() {
if (this->filter_mode_ == FILTER_EDGE) {
this->pin_->attach_interrupt(PulseMeterSensor::edge_intr, this, gpio::INTERRUPT_RISING_EDGE);
} else if (this->filter_mode_ == FILTER_PULSE) {
// Set the pin value to the current value to avoid a false edge
this->pulse_state_.last_pin_val_ = this->isr_pin_.digital_read();
this->pulse_state_.latched_ = this->pulse_state_.last_pin_val_;
this->pin_->attach_interrupt(PulseMeterSensor::pulse_intr, this, gpio::INTERRUPT_ANY_EDGE);
}
}
void PulseMeterSensor::loop() {
const uint32_t now = micros();
// Reset the count in get before we pass it back to the ISR as set
this->get_->count_ = 0;
@@ -38,6 +43,20 @@ void PulseMeterSensor::loop() {
this->set_ = this->get_;
this->get_ = temp;
// If an edge was peeked, repay the debt
if (this->peeked_edge_ && this->get_->count_ > 0) {
this->peeked_edge_ = false;
this->get_->count_--;
}
// If there is an unprocessed edge, and filter_us_ has passed since, count this edge early
if (this->get_->last_rising_edge_us_ != this->get_->last_detected_edge_us_ &&
now - this->get_->last_rising_edge_us_ >= this->filter_us_) {
this->peeked_edge_ = true;
this->get_->last_detected_edge_us_ = this->get_->last_rising_edge_us_;
this->get_->count_++;
}
// Check if we detected a pulse this loop
if (this->get_->count_ > 0) {
// Keep a running total of pulses if a total sensor is configured
@@ -64,7 +83,6 @@ void PulseMeterSensor::loop() {
}
// No detected edges this loop
else {
const uint32_t now = micros();
const uint32_t time_since_valid_edge_us = now - this->last_processed_edge_us_;
switch (this->meter_state_) {
@@ -102,11 +120,14 @@ void IRAM_ATTR PulseMeterSensor::edge_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();
auto &state = sensor->edge_state_;
auto &set = *sensor->set_;
if ((now - sensor->last_edge_candidate_us_) >= sensor->filter_us_) {
sensor->last_edge_candidate_us_ = now;
sensor->set_->last_detected_edge_us_ = now;
sensor->set_->count_++;
if ((now - state.last_sent_edge_us_) >= sensor->filter_us_) {
state.last_sent_edge_us_ = now;
set.last_detected_edge_us_ = now;
set.last_rising_edge_us_ = now;
set.count_++;
}
}
@@ -115,33 +136,27 @@ void IRAM_ATTR PulseMeterSensor::pulse_intr(PulseMeterSensor *sensor) {
// Get the current time before we do anything else so the measurements are consistent
const uint32_t now = micros();
const bool pin_val = sensor->isr_pin_.digital_read();
auto &state = sensor->pulse_state_;
auto &set = *sensor->set_;
// A pulse occurred faster than we can detect
if (sensor->last_pin_val_ == pin_val) {
// If we haven't reached the filter length yet we need to reset our last_intr_ to now
// otherwise we can consider this noise as the "pulse" was certainly less than filter_us_
if (now - sensor->last_intr_ < sensor->filter_us_) {
sensor->last_intr_ = now;
}
} else {
// Check if the last interrupt was long enough in the past
if (now - sensor->last_intr_ > sensor->filter_us_) {
// High pulse of filter length now falling (therefore last_intr_ was the rising edge)
if (!sensor->in_pulse_ && sensor->last_pin_val_) {
sensor->last_edge_candidate_us_ = sensor->last_intr_;
sensor->in_pulse_ = true;
}
// Low pulse of filter length now rising (therefore last_intr_ was the falling edge)
else if (sensor->in_pulse_ && !sensor->last_pin_val_) {
sensor->set_->last_detected_edge_us_ = sensor->last_edge_candidate_us_;
sensor->set_->count_++;
sensor->in_pulse_ = false;
}
}
// Filter length has passed since the last interrupt
const bool length = now - state.last_intr_ >= sensor->filter_us_;
sensor->last_intr_ = now;
sensor->last_pin_val_ = pin_val;
if (length && state.latched_ && !state.last_pin_val_) { // Long enough low edge
state.latched_ = false;
} else if (length && !state.latched_ && state.last_pin_val_) { // Long enough high edge
state.latched_ = true;
set.last_detected_edge_us_ = state.last_intr_;
set.count_++;
}
// Due to order of operations this includes
// length && latched && rising (just reset from a long low edge)
// !latched && (rising || high) (noise on the line resetting the potential rising edge)
set.last_rising_edge_us_ = !state.latched_ && pin_val ? now : set.last_detected_edge_us_;
state.last_intr_ = now;
state.last_pin_val_ = pin_val;
}
} // namespace pulse_meter