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150 lines
4.2 KiB
150 lines
4.2 KiB
// -----------------------------------------------------------------------------
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// MAX6675 Sensor
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// Uses MAX6675_Thermocouple library
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// Copyright (C) 2017-2018 by Xose Pérez <andrade dot luciano at gmail dot com>
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// -----------------------------------------------------------------------------
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#if SENSOR_SUPPORT && MAX6675_SUPPORT
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#pragma once
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#include "Arduino.h"
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#include "BaseSensor.h"
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#include <vector>
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#include <MAX6675.h>
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#define MAX6675_READ_INTERVAL 3000
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class MAX6675Sensor : public BaseSensor {
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public:
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// ---------------------------------------------------------------------
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// Public
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// ---------------------------------------------------------------------
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MAX6675Sensor(): BaseSensor() {
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_sensor_id = SENSOR_MAX6675_ID;
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}
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~MAX6675Sensor() {
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}
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// ---------------------------------------------------------------------
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// ---------------------------------------------------------------------
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void setCS(unsigned char pin_cs) {
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if (_pin_cs == pin_cs) return;
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_pin_cs = pin_cs;
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_dirty = true;
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}
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void setSO(unsigned char pin_so) {
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if (_pin_so == pin_so) return;
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_pin_so = pin_so;
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_dirty = true;
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}
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void setSCK(unsigned char pin_sck) {
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if (_pin_sck == pin_sck) return;
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_pin_sck = pin_sck;
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_dirty = true;
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}
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// ---------------------------------------------------------------------
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// Sensor API
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// ---------------------------------------------------------------------
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// Initialization method, must be idempotent
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void begin() {
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if (!_dirty) return;
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//// MAX6675
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int units = 1; // Units to readout temp (0 = raw, 1 = ˚C, 2 = ˚F)
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if (_max) delete _max;
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_max = new MAX6675(_pin_cs,_pin_so,_pin_sck,units);
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_count = 1;
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_ready = true;
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_dirty = false;
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}
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// Loop-like method, call it in your main loop
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void tick() {
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static unsigned long last = 0;
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if (millis() - last < MAX6675_READ_INTERVAL) return;
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last = millis();
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last_read = _max->read_temp();
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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), "MAX6675 @ CS %d", _gpio);
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snprintf(buffer, sizeof(buffer), "MAX6675 ");
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return String(buffer);
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}
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String address(unsigned char index){
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return String("@ address");
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}
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// Address of the device
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// Descriptive name of the slot # index
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String slot(unsigned char index) {
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if (index < _count) {
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// char buffer[40];
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// uint8_t * address = _devices[index].address;
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// snprintf(buffer, sizeof(buffer), "%s (%02X%02X%02X%02X%02X%02X%02X%02X) @ GPIO%d",
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// chipAsString(index).c_str(),
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// address[0], address[1], address[2], address[3],
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// address[4], address[5], address[6], address[7],
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// _gpio
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// );
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return description();
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}
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return String();
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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 < _count) return MAGNITUDE_TEMPERATURE;
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return MAGNITUDE_NONE;
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}
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// Pre-read hook (usually to populate registers with up-to-date data)
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void pre() {
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_error = SENSOR_ERROR_OK;
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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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return last_read;
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}
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protected:
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// ---------------------------------------------------------------------
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// Protected
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// ---------------------------------------------------------------------
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unsigned int _pin_cs = MAX6675_CS_PIN;
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unsigned int _pin_so = MAX6675_SO_PIN;
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unsigned int _pin_sck = MAX6675_SCK_PIN;
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bool _busy = false;
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double last_read = 0;
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MAX6675 * _max = NULL;
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};
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#endif // SENSOR_SUPPORT && MAX6675_SUPPORT
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