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Check for missed pulse_meter ISRs in the main loop (#6126)

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This commit is contained in:
Trent Houliston
2025-05-01 22:29:12 +10:00
committed by GitHub
parent 836e5ffa43
commit d6699fa3c0
2 changed files with 37 additions and 17 deletions
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44
esphome/components/pulse_meter/pulse_meter_sensor.cpp
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@@ -18,6 +18,9 @@ void PulseMeterSensor::setup() {
this->pin_->setup();
this->isr_pin_ = pin_->to_isr();
// Set the pin value to the current value to avoid a false edge
this->last_pin_val_ = this->pin_->digital_read();
// Set the last processed edge to now for the first timeout
this->last_processed_edge_us_ = micros();
@@ -25,23 +28,37 @@ void PulseMeterSensor::setup() {
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->pulse_state_.latched_ = this->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;
// Swap out set and get to get the latest state from the ISR
// The ISR could interrupt on any of these lines and the results would be consistent
auto *temp = this->set_;
this->set_ = this->get_;
this->get_ = temp;
{
// Lock the interrupt so the interrupt code doesn't interfere with itself
InterruptLock lock;
// Sometimes ESP devices miss interrupts if the edge rises or falls too slowly.
// See https://github.com/espressif/arduino-esp32/issues/4172
// If the edges are rising too slowly it also implies that the pulse rate is slow.
// Therefore the update rate of the loop is likely fast enough to detect the edges.
// When the main loop detects an edge that the ISR didn't it will run the ISR functions directly.
bool current = this->pin_->digital_read();
if (this->filter_mode_ == FILTER_EDGE && current && !this->last_pin_val_) {
PulseMeterSensor::edge_intr(this);
} else if (this->filter_mode_ == FILTER_PULSE && current != this->last_pin_val_) {
PulseMeterSensor::pulse_intr(this);
}
this->last_pin_val_ = current;
// Swap out set and get to get the latest state from the ISR
std::swap(this->set_, this->get_);
}
const uint32_t now = micros();
// If an edge was peeked, repay the debt
if (this->peeked_edge_ && this->get_->count_ > 0) {
@@ -131,6 +148,9 @@ void IRAM_ATTR PulseMeterSensor::edge_intr(PulseMeterSensor *sensor) {
set.last_rising_edge_us_ = now;
set.count_++;
}
// This ISR is bound to rising edges, so the pin is high
sensor->last_pin_val_ = true;
}
void IRAM_ATTR PulseMeterSensor::pulse_intr(PulseMeterSensor *sensor) {
@@ -144,9 +164,9 @@ void IRAM_ATTR PulseMeterSensor::pulse_intr(PulseMeterSensor *sensor) {
// Filter length has passed since the last interrupt
const bool length = now - state.last_intr_ >= sensor->filter_us_;
if (length && state.latched_ && !state.last_pin_val_) { // Long enough low edge
if (length && state.latched_ && !sensor->last_pin_val_) { // Long enough low edge
state.latched_ = false;
} else if (length && !state.latched_ && state.last_pin_val_) { // Long enough high edge
} else if (length && !state.latched_ && sensor->last_pin_val_) { // Long enough high edge
state.latched_ = true;
set.last_detected_edge_us_ = state.last_intr_;
set.count_++;
@@ -158,7 +178,7 @@ void IRAM_ATTR PulseMeterSensor::pulse_intr(PulseMeterSensor *sensor) {
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;
sensor->last_pin_val_ = pin_val;
}
} // namespace pulse_meter