110 lines
3.9 KiB
C++
110 lines
3.9 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include "../inc/MarlinConfigPre.h"
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#ifndef FLOWMETER_PPL
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#define FLOWMETER_PPL 5880 // Pulses per liter
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#endif
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#ifndef FLOWMETER_INTERVAL
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#define FLOWMETER_INTERVAL 1000 // milliseconds
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#endif
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// Cooling device
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class Cooler {
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public:
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static uint16_t capacity; // Cooling capacity in watts
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static uint16_t load; // Cooling load in watts
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static bool enabled;
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static void enable() { enabled = true; }
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static void disable() { enabled = false; }
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static void toggle() { enabled = !enabled; }
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static uint8_t mode; // 0 = CO2 Liquid cooling, 1 = Laser Diode TEC Heatsink Cooling
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static void set_mode(const uint8_t m) { mode = m; }
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#if ENABLED(LASER_COOLANT_FLOW_METER)
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static float flowrate; // Flow meter reading in liters-per-minute.
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static bool flowmeter; // Flag to monitor the flow
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static volatile uint16_t flowpulses; // Flowmeter IRQ pulse count
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static millis_t flowmeter_next_ms; // Next time at which to calculate flow
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static void set_flowmeter(const bool sflag) {
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if (flowmeter != sflag) {
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flowmeter = sflag;
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if (sflag) {
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flowpulses = 0;
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flowmeter_next_ms = millis() + FLOWMETER_INTERVAL;
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}
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}
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}
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// To calculate flow we only need to count pulses
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static void flowmeter_ISR() { flowpulses++; }
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// Enable / Disable the flow meter interrupt
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static void flowmeter_interrupt_enable() {
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attachInterrupt(digitalPinToInterrupt(FLOWMETER_PIN), flowmeter_ISR, RISING);
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}
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static void flowmeter_interrupt_disable() {
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detachInterrupt(digitalPinToInterrupt(FLOWMETER_PIN));
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}
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// Enable / Disable the flow meter interrupt
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static void flowmeter_enable() { set_flowmeter(true); flowpulses = 0; flowmeter_interrupt_enable(); }
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static void flowmeter_disable() { set_flowmeter(false); flowmeter_interrupt_disable(); flowpulses = 0; }
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// Get the total flow (in liters per minute) since the last reading
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static void calc_flowrate() {
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// flowrate = (litres) * (seconds) = litres per minute
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flowrate = (flowpulses / (float)FLOWMETER_PPL) * ((1000.0f / (float)FLOWMETER_INTERVAL) * 60.0f);
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flowpulses = 0;
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}
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// Userland task to update the flow meter
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static void flowmeter_task(const millis_t ms=millis()) {
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if (!flowmeter) // !! The flow meter must always be on !!
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flowmeter_enable(); // Init and prime
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if (ELAPSED(ms, flowmeter_next_ms)) {
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calc_flowrate();
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flowmeter_next_ms = ms + FLOWMETER_INTERVAL;
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}
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}
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#if ENABLED(FLOWMETER_SAFETY)
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static bool flowfault; // Flag that the cooler is in a fault state
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static bool flowsafety_enabled; // Flag to disable the cutter if flow rate is too low
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static void flowsafety_toggle() { flowsafety_enabled = !flowsafety_enabled; }
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static bool check_flow_too_low() {
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const bool too_low = flowsafety_enabled && flowrate < (FLOWMETER_MIN_LITERS_PER_MINUTE);
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flowfault = too_low;
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return too_low;
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}
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#endif
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#endif
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};
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extern Cooler cooler;
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