You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
4.2 KiB
143 lines
4.2 KiB
// -----------------------------------------------------------------------------
|
|
// MAX6675 Sensor
|
|
// Uses MAX6675_Thermocouple library
|
|
// Copyright (C) 2017-2018 by Xose Pérez <andrade dot luciano at gmail dot com>
|
|
// -----------------------------------------------------------------------------
|
|
|
|
#if SENSOR_SUPPORT && MAX6675_SUPPORT
|
|
|
|
#pragma once
|
|
|
|
#include "Arduino.h"
|
|
#include "BaseSensor.h"
|
|
#include <vector>
|
|
#include <MAX6675.h>
|
|
|
|
#define MAX6675_READ_INTERVAL 3000
|
|
|
|
class MAX6675Sensor : public BaseSensor {
|
|
|
|
public:
|
|
|
|
// ---------------------------------------------------------------------
|
|
// Public
|
|
// ---------------------------------------------------------------------
|
|
|
|
MAX6675Sensor(): BaseSensor() {
|
|
_sensor_id = SENSOR_MAX6675_ID;
|
|
_count = 1;
|
|
}
|
|
|
|
~MAX6675Sensor() {
|
|
}
|
|
|
|
// ---------------------------------------------------------------------
|
|
// ---------------------------------------------------------------------
|
|
|
|
void setCS(unsigned char pin_cs) {
|
|
if (_pin_cs == pin_cs) return;
|
|
_pin_cs = pin_cs;
|
|
_dirty = true;
|
|
}
|
|
|
|
void setSO(unsigned char pin_so) {
|
|
if (_pin_so == pin_so) return;
|
|
_pin_so = pin_so;
|
|
_dirty = true;
|
|
}
|
|
|
|
void setSCK(unsigned char pin_sck) {
|
|
if (_pin_sck == pin_sck) return;
|
|
_pin_sck = pin_sck;
|
|
_dirty = true;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------
|
|
// Sensor API
|
|
// ---------------------------------------------------------------------
|
|
|
|
// Initialization method, must be idempotent
|
|
void begin() {
|
|
|
|
if (!_dirty) return;
|
|
|
|
//// MAX6675
|
|
int units = 1; // Units to readout temp (0 = raw, 1 = ˚C, 2 = ˚F)
|
|
if (_max) delete _max;
|
|
_max = new MAX6675(_pin_cs, _pin_so, _pin_sck, units);
|
|
|
|
_ready = true;
|
|
_dirty = false;
|
|
|
|
}
|
|
|
|
// Loop-like method, call it in your main loop
|
|
void tick() {
|
|
static unsigned long last = 0;
|
|
if (millis() - last < MAX6675_READ_INTERVAL) return;
|
|
last = millis();
|
|
last_read = _max->read_temp();
|
|
}
|
|
|
|
// Descriptive name of the sensor
|
|
String description() {
|
|
char buffer[20];
|
|
//snprintf(buffer, sizeof(buffer), "MAX6675 @ CS %d", _gpio);
|
|
snprintf(buffer, sizeof(buffer), "MAX6675");
|
|
return String(buffer);
|
|
}
|
|
|
|
String address(unsigned char index) {
|
|
return String("@ address");
|
|
}
|
|
|
|
// Address of the device
|
|
// Descriptive name of the slot # index
|
|
String slot(unsigned char index) {
|
|
if (index < _count) {
|
|
// char buffer[40];
|
|
// uint8_t * address = _devices[index].address;
|
|
// snprintf(buffer, sizeof(buffer), "%s (%02X%02X%02X%02X%02X%02X%02X%02X) @ GPIO%d",
|
|
// chipAsString(index).c_str(),
|
|
// address[0], address[1], address[2], address[3],
|
|
// address[4], address[5], address[6], address[7],
|
|
// _gpio
|
|
// );
|
|
return description();
|
|
}
|
|
return String();
|
|
}
|
|
|
|
// Type for slot # index
|
|
unsigned char type(unsigned char index) {
|
|
if (index < _count) return MAGNITUDE_TEMPERATURE;
|
|
return MAGNITUDE_NONE;
|
|
}
|
|
|
|
// Pre-read hook (usually to populate registers with up-to-date data)
|
|
void pre() {
|
|
_error = SENSOR_ERROR_OK;
|
|
}
|
|
|
|
// Current value for slot # index
|
|
double value(unsigned char index) {
|
|
return last_read;
|
|
}
|
|
|
|
protected:
|
|
|
|
// ---------------------------------------------------------------------
|
|
// Protected
|
|
// ---------------------------------------------------------------------
|
|
|
|
unsigned int _pin_cs = MAX6675_CS_PIN;
|
|
unsigned int _pin_so = MAX6675_SO_PIN;
|
|
unsigned int _pin_sck = MAX6675_SCK_PIN;
|
|
bool _busy = false;
|
|
double last_read = 0;
|
|
MAX6675 * _max = NULL;
|
|
|
|
|
|
};
|
|
|
|
#endif // SENSOR_SUPPORT && MAX6675_SUPPORT
|