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238 lines
7.6 KiB
238 lines
7.6 KiB
// -----------------------------------------------------------------------------
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// Event Counter Sensor
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// Copyright (C) 2017-2019 by Xose Pérez <xose dot perez at gmail dot com>
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// -----------------------------------------------------------------------------
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#if SENSOR_SUPPORT && EVENTS_SUPPORT
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#pragma once
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#include <Arduino.h>
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#include "../debug.h"
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#include "BaseSensor.h"
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#include <atomic>
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// we are bound by usable GPIOs
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#define EVENTS_SENSORS_MAX 10
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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() {
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_count = 2;
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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 setPinMode(unsigned char pin_mode) {
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_pin_mode = pin_mode;
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}
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void setInterruptMode(unsigned char interrupt_mode) {
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_interrupt_mode = interrupt_mode;
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}
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void setDebounceTime(unsigned long ms) {
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_isr_debounce = microsecondsToClockCycles(ms * 1000);
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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 getPinMode() {
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return _pin_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 _isr_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, _pin_mode);
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_counter = 0;
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_enableInterrupts(true);
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_ready = 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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// Descriptive name of the slot # index
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String description(unsigned char index) {
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return description();
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};
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// Address of the sensor (it could be the GPIO or I2C address)
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String address(unsigned char index) {
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return String(_gpio);
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}
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// Type for slot # index
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unsigned char type(unsigned char index) {
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if (index == 0) return MAGNITUDE_COUNT;
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if (index == 1) return MAGNITUDE_EVENT;
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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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auto copy = _counter.load();
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if (index == 0) {
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_counter = 0ul;
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return copy;
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} else if (index == 1) {
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return (copy > 0) ? 1.0 : 0.0;
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}
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return 0.0;
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}
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// Handle interrupt calls from isr[GPIO] functions
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void ICACHE_RAM_ATTR handleInterrupt(unsigned char gpio) {
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// clock count in 32bit value, overflowing:
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// ~53s when F_CPU is 80MHz
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// ~26s when F_CPU is 160MHz
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// see: cores/esp8266/Arduino.h definitions
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//
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// Note:
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// To convert to / from normal time values, use:
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// - microsecondsToClockCycles(microseconds)
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// - clockCyclesToMicroseconds(cycles)
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// Since the division operation on this chip is pretty slow,
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// avoid doing the conversion here
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auto cycles = ESP.getCycleCount();
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if (cycles - _isr_last > _isr_debounce) {
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auto counter = _counter.load();
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_counter.store(counter + 1ul);
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_isr_last = cycles;
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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(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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if (value) {
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_detach(_gpio);
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_attach(_gpio, _interrupt_mode);
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} else {
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_detach(_gpio);
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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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// XXX: cannot have default values with GCC 4.8
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std::atomic<unsigned long> _counter;
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unsigned long _isr_last = 0;
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unsigned long _isr_debounce = microsecondsToClockCycles(EVENTS1_DEBOUNCE * 1000);
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unsigned char _gpio = GPIO_NONE;
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unsigned char _pin_mode = INPUT;
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unsigned char _interrupt_mode = RISING;
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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[EVENTS_SENSORS_MAX] = {nullptr};
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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(unsigned char gpio, unsigned char mode) {
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if (!gpioValid(gpio)) return;
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unsigned char index = gpio > 5 ? gpio-6 : gpio;
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if (_event_sensor_instance[index] == this) return;
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if (_event_sensor_instance[index]) detachInterrupt(gpio);
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_event_sensor_instance[index] = this;
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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_P(PSTR("[SENSOR] GPIO%d interrupt attached to %s\n"), gpio, this->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 (!gpioValid(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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_event_sensor_instance[index] = nullptr;
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#if SENSOR_DEBUG
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DEBUG_MSG_P(PSTR("[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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}
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}
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#endif // SENSOR_SUPPORT && EVENTS_SUPPORT
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