Marlin 2.0 for Flying Bear 4S/5
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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;