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