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