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199 lines
5.7 KiB
199 lines
5.7 KiB
// -----------------------------------------------------------------------------
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// Abstract sensor class (other sensor classes extend this class)
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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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typedef enum magnitude_t {
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MAGNITUDE_NONE = 0,
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MAGNITUDE_TEMPERATURE,
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MAGNITUDE_HUMIDITY,
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MAGNITUDE_PRESSURE,
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MAGNITUDE_CURRENT,
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MAGNITUDE_VOLTAGE,
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MAGNITUDE_POWER_ACTIVE,
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MAGNITUDE_POWER_APPARENT,
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MAGNITUDE_POWER_REACTIVE,
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MAGNITUDE_ENERGY,
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MAGNITUDE_ENERGY_DELTA,
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MAGNITUDE_POWER_FACTOR,
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MAGNITUDE_ANALOG,
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MAGNITUDE_DIGITAL,
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MAGNITUDE_EVENTS,
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MAGNITUDE_PM1dot0,
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MAGNITUDE_PM2dot5,
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MAGNITUDE_PM10,
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MAGNITUDE_CO2,
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MAGNITUDE_MAX,
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} magnitude_t;
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#define GPIO_NONE 0x99
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#define SENSOR_ERROR_OK 0 // No error
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#define SENSOR_ERROR_OUT_OF_RANGE 1 // Result out of sensor range
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#define SENSOR_ERROR_WARM_UP 2 // Sensor is warming-up
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#define SENSOR_ERROR_TIMEOUT 3 // Response from sensor timed out
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#define SENSOR_ERROR_UNKNOWN_ID 4 // Sensor did not report a known ID
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#define SENSOR_ERROR_CRC 5 // Sensor data corrupted
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#define SENSOR_ERROR_I2C 6 // Wrong or locked I2C address
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class BaseSensor {
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public:
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// Constructor
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BaseSensor() {}
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// Destructor
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~BaseSensor() {}
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// Initialization method, must be idempotent
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virtual void begin() {}
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// Loop-like method, call it in your main loop
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virtual void tick() {}
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// Pre-read hook (usually to populate registers with up-to-date data)
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virtual void pre() {}
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// Post-read hook (usually to reset things)
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virtual void post() {}
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// Descriptive name of the sensor
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virtual String name() {}
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// Descriptive name of the slot # index
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virtual String slot(unsigned char index) {}
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// Type for slot # index
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virtual magnitude_t type(unsigned char index) {}
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// Current value for slot # index
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virtual double value(unsigned char index) {}
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// Specific for I2C sensors
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unsigned char lock_i2c(unsigned char address, size_t size, unsigned char * addresses) {
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// Check if we should release a previously locked address
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if (_previous_address != address) {
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i2cReleaseLock(_previous_address);
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}
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// If we have already an address, check it is not locked
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if (address && !i2cGetLock(address)) {
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_error = SENSOR_ERROR_I2C;
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// If we don't have an address...
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} else {
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// Trigger auto-discover
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address = i2cFindAndLock(size, addresses);
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// If still nothing exit with error
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if (address == 0) _error = SENSOR_ERROR_I2C;
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}
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_previous_address = address;
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return address;
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}
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// Return sensor status (true for ready)
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bool status() { return _error == 0; }
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// Return sensor last internal error
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int error() { return _error; }
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// Number of available slots
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unsigned char count() { return _count; }
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// Handle interrupt calls
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virtual void handleInterrupt(unsigned char gpio) {}
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// Interrupt attach callback
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void attached(unsigned char gpio) {
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#if SENSOR_DEBUG
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DEBUG_MSG("[SENSOR] GPIO%d interrupt attached to %s\n", gpio, name().c_str());
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#endif
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}
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// Interrupt detach callback
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void detached(unsigned char gpio) {
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#if SENSOR_DEBUG
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DEBUG_MSG("[SENSOR] GPIO%d interrupt detached from %s\n", gpio, name().c_str());
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#endif
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}
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protected:
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// Attach interrupt
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void attach(BaseSensor * instance, unsigned char gpio, unsigned char mode);
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// Detach interrupt
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void detach(unsigned char gpio);
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int _error = 0;
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bool _dirty = true;
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unsigned char _count = 0;
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// I2C
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unsigned char _previous_address = 0;
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unsigned char _address = 0;
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};
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// -----------------------------------------------------------------------------
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// Interrupt helpers
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// -----------------------------------------------------------------------------
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BaseSensor * _isr_sensor_instance[16] = {NULL};
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void _sensor_isr(unsigned char gpio) {
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if (_isr_sensor_instance[gpio]) {
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_isr_sensor_instance[gpio]->handleInterrupt(gpio);
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}
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}
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void _sensor_isr_0() { _sensor_isr(0); }
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void _sensor_isr_2() { _sensor_isr(2); }
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void _sensor_isr_4() { _sensor_isr(4); }
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void _sensor_isr_5() { _sensor_isr(5); }
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void _sensor_isr_12() { _sensor_isr(12); }
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void _sensor_isr_13() { _sensor_isr(13); }
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void _sensor_isr_14() { _sensor_isr(14); }
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void _sensor_isr_15() { _sensor_isr(15); }
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void (*_sensor_isrs[16])() = {
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_sensor_isr_0, NULL, _sensor_isr_2, NULL, _sensor_isr_4, _sensor_isr_5,
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NULL, NULL, NULL, NULL, NULL, NULL,
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_sensor_isr_12, _sensor_isr_13, _sensor_isr_14, _sensor_isr_15
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};
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void BaseSensor::attach(BaseSensor * instance, unsigned char gpio, unsigned char mode) {
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detach(gpio);
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if (_sensor_isrs[gpio]) {
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_isr_sensor_instance[gpio] = instance;
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attachInterrupt(gpio, _sensor_isrs[gpio], mode);
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instance->attached(gpio);
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}
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}
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void BaseSensor::detach(unsigned char gpio) {
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if (_isr_sensor_instance[gpio]) {
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detachInterrupt(gpio);
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_isr_sensor_instance[gpio]->detached(gpio);
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_isr_sensor_instance[gpio] = NULL;
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}
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}
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