Fork of the espurna firmware for `mhsw` switches
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// -----------------------------------------------------------------------------
// Event Counter Sensor
// Copyright (C) 2017 by Xose Pérez <xose dot perez at gmail dot com>
// -----------------------------------------------------------------------------
#pragma once
#include "Arduino.h"
#include "BaseSensor.h"
class EventSensor : public BaseSensor {
public:
// ---------------------------------------------------------------------
// Public
// ---------------------------------------------------------------------
EventSensor(): BaseSensor() {
_count = 1;
_sensor_id = SENSOR_EVENTS_ID;
}
~EventSensor() {
_enableInterrupts(false);
}
// ---------------------------------------------------------------------
void setGPIO(unsigned char gpio) {
_gpio = gpio;
}
void setMode(unsigned char mode) {
_mode = mode;
}
void setInterruptMode(unsigned char mode) {
_interrupt_mode = mode;
}
void setDebounceTime(unsigned long debounce) {
_debounce = debounce;
}
// ---------------------------------------------------------------------
unsigned char getGPIO() {
return _gpio;
}
unsigned char getMode() {
return _mode;
}
unsigned char getInterruptMode() {
return _interrupt_mode;
}
unsigned long getDebounceTime() {
return _debounce;
}
// ---------------------------------------------------------------------
// Sensors API
// ---------------------------------------------------------------------
// Initialization method, must be idempotent
// Defined outside the class body
void begin() {
pinMode(_gpio, _mode);
_enableInterrupts(true);
}
// Descriptive name of the sensor
String description() {
char buffer[20];
snprintf(buffer, sizeof(buffer), "INTERRUPT @ GPIO%d", _gpio);
return String(buffer);
}
// Type for slot # index
magnitude_t type(unsigned char index) {
_error = SENSOR_ERROR_OK;
if (index == 0) return MAGNITUDE_EVENTS;
_error = SENSOR_ERROR_OUT_OF_RANGE;
return MAGNITUDE_NONE;
}
// Current value for slot # index
double value(unsigned char index) {
_error = SENSOR_ERROR_OK;
if (index == 0) {
double value = _events;
_events = 0;
return value;
};
_error = SENSOR_ERROR_OUT_OF_RANGE;
return 0;
}
// Handle interrupt calls
void handleInterrupt(unsigned char gpio) {
(void) gpio;
static unsigned long last = 0;
if (millis() - last > _debounce) {
_events = _events + 1;
last = millis();
}
}
protected:
// ---------------------------------------------------------------------
// Interrupt management
// ---------------------------------------------------------------------
void _attach(EventSensor * instance, unsigned char gpio, unsigned char mode);
void _detach(unsigned char gpio);
void _enableInterrupts(bool value) {
static unsigned char _interrupt_gpio = GPIO_NONE;
if (value) {
if (_interrupt_gpio != GPIO_NONE) _detach(_interrupt_gpio);
_attach(this, _gpio, _interrupt_mode);
_interrupt_gpio = _gpio;
} else if (_interrupt_gpio != GPIO_NONE) {
_detach(_interrupt_gpio);
_interrupt_gpio = GPIO_NONE;
}
}
// ---------------------------------------------------------------------
// Protected
// ---------------------------------------------------------------------
volatile unsigned long _events = 0;
unsigned long _debounce = EVENTS_DEBOUNCE;
unsigned char _gpio;
unsigned char _mode;
unsigned char _interrupt_mode;
};
// -----------------------------------------------------------------------------
// Interrupt helpers
// -----------------------------------------------------------------------------
EventSensor * _event_sensor_instance[10] = {NULL};
void ICACHE_RAM_ATTR _event_sensor_isr(unsigned char gpio) {
unsigned char index = gpio > 5 ? gpio-6 : gpio;
if (_event_sensor_instance[index]) {
_event_sensor_instance[index]->handleInterrupt(gpio);
}
}
void ICACHE_RAM_ATTR _event_sensor_isr_0() { _event_sensor_isr(0); }
void ICACHE_RAM_ATTR _event_sensor_isr_1() { _event_sensor_isr(1); }
void ICACHE_RAM_ATTR _event_sensor_isr_2() { _event_sensor_isr(2); }
void ICACHE_RAM_ATTR _event_sensor_isr_3() { _event_sensor_isr(3); }
void ICACHE_RAM_ATTR _event_sensor_isr_4() { _event_sensor_isr(4); }
void ICACHE_RAM_ATTR _event_sensor_isr_5() { _event_sensor_isr(5); }
void ICACHE_RAM_ATTR _event_sensor_isr_12() { _event_sensor_isr(12); }
void ICACHE_RAM_ATTR _event_sensor_isr_13() { _event_sensor_isr(13); }
void ICACHE_RAM_ATTR _event_sensor_isr_14() { _event_sensor_isr(14); }
void ICACHE_RAM_ATTR _event_sensor_isr_15() { _event_sensor_isr(15); }
static void (*_event_sensor_isr_list[10])() = {
_event_sensor_isr_0, _event_sensor_isr_1, _event_sensor_isr_2,
_event_sensor_isr_3, _event_sensor_isr_4, _event_sensor_isr_5,
_event_sensor_isr_12, _event_sensor_isr_13, _event_sensor_isr_14,
_event_sensor_isr_15
};
void EventSensor::_attach(EventSensor * instance, unsigned char gpio, unsigned char mode) {
if (!_validGPIO(gpio)) return;
_detach(gpio);
unsigned char index = gpio > 5 ? gpio-6 : gpio;
_event_sensor_instance[index] = instance;
attachInterrupt(gpio, _event_sensor_isr_list[index], mode);
#if SENSOR_DEBUG
DEBUG_MSG("[SENSOR] GPIO%d interrupt attached to %s\n", gpio, instance->description().c_str());
#endif
}
void EventSensor::_detach(unsigned char gpio) {
if (!_validGPIO(gpio)) return;
unsigned char index = gpio > 5 ? gpio-6 : gpio;
if (_event_sensor_instance[index]) {
detachInterrupt(gpio);
#if SENSOR_DEBUG
DEBUG_MSG("[SENSOR] GPIO%d interrupt detached from %s\n", gpio, _event_sensor_instance[index]->description().c_str());
#endif
_event_sensor_instance[index] = NULL;
}
}