171 lines
6.0 KiB
C++
171 lines
6.0 KiB
C++
/**
|
|
* Marlin 3D Printer Firmware
|
|
* Copyright (C) 2019 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 <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include "../../inc/MarlinConfig.h"
|
|
|
|
#if ENABLED(SPINDLE_LASER_ENABLE)
|
|
|
|
#include "../gcode.h"
|
|
#include "../../module/stepper.h"
|
|
|
|
uint8_t spindle_laser_power; // = 0
|
|
|
|
/**
|
|
* M3: Spindle Clockwise
|
|
* M4: Spindle Counter-clockwise
|
|
*
|
|
* S0 turns off spindle.
|
|
*
|
|
* If no speed PWM output is defined then M3/M4 just turns it on.
|
|
*
|
|
* At least 12.8KHz (50Hz * 256) is needed for spindle PWM.
|
|
* Hardware PWM is required. ISRs are too slow.
|
|
*
|
|
* NOTE: WGM for timers 3, 4, and 5 must be either Mode 1 or Mode 5.
|
|
* No other settings give a PWM signal that goes from 0 to 5 volts.
|
|
*
|
|
* The system automatically sets WGM to Mode 1, so no special
|
|
* initialization is needed.
|
|
*
|
|
* WGM bits for timer 2 are automatically set by the system to
|
|
* Mode 1. This produces an acceptable 0 to 5 volt signal.
|
|
* No special initialization is needed.
|
|
*
|
|
* NOTE: A minimum PWM frequency of 50 Hz is needed. All prescaler
|
|
* factors for timers 2, 3, 4, and 5 are acceptable.
|
|
*
|
|
* SPINDLE_LASER_ENABLE_PIN needs an external pullup or it may power on
|
|
* the spindle/laser during power-up or when connecting to the host
|
|
* (usually goes through a reset which sets all I/O pins to tri-state)
|
|
*
|
|
* PWM duty cycle goes from 0 (off) to 255 (always on).
|
|
*/
|
|
|
|
// Wait for spindle to come up to speed
|
|
inline void delay_for_power_up() { safe_delay(SPINDLE_LASER_POWERUP_DELAY); }
|
|
|
|
// Wait for spindle to stop turning
|
|
inline void delay_for_power_down() { safe_delay(SPINDLE_LASER_POWERDOWN_DELAY); }
|
|
|
|
/**
|
|
* ocr_val_mode() is used for debugging and to get the points needed to compute the RPM vs ocr_val line
|
|
*
|
|
* it accepts inputs of 0-255
|
|
*/
|
|
|
|
inline void set_spindle_laser_ocr(const uint8_t ocr) {
|
|
WRITE(SPINDLE_LASER_ENABLE_PIN, SPINDLE_LASER_ENABLE_INVERT); // turn spindle on (active low)
|
|
analogWrite(SPINDLE_LASER_PWM_PIN, (SPINDLE_LASER_PWM_INVERT) ? 255 - ocr : ocr);
|
|
}
|
|
|
|
#if ENABLED(SPINDLE_LASER_PWM)
|
|
|
|
void update_spindle_laser_power() {
|
|
if (spindle_laser_power == 0) {
|
|
WRITE(SPINDLE_LASER_ENABLE_PIN, !SPINDLE_LASER_ENABLE_INVERT); // turn spindle off (active low)
|
|
analogWrite(SPINDLE_LASER_PWM_PIN, SPINDLE_LASER_PWM_INVERT ? 255 : 0); // only write low byte
|
|
delay_for_power_down();
|
|
}
|
|
else { // Convert RPM to PWM duty cycle
|
|
constexpr float inv_slope = 1.0f / (SPEED_POWER_SLOPE),
|
|
min_ocr = (SPEED_POWER_MIN - (SPEED_POWER_INTERCEPT)) * inv_slope, // Minimum allowed
|
|
max_ocr = (SPEED_POWER_MAX - (SPEED_POWER_INTERCEPT)) * inv_slope; // Maximum allowed
|
|
int16_t ocr_val;
|
|
if (spindle_laser_power <= SPEED_POWER_MIN) ocr_val = min_ocr; // Use minimum if set below
|
|
else if (spindle_laser_power >= SPEED_POWER_MAX) ocr_val = max_ocr; // Use maximum if set above
|
|
else ocr_val = (spindle_laser_power - (SPEED_POWER_INTERCEPT)) * inv_slope; // Use calculated OCR value
|
|
set_spindle_laser_ocr(ocr_val & 0xFF); // ...limited to Atmel PWM max
|
|
delay_for_power_up();
|
|
}
|
|
}
|
|
|
|
#endif // SPINDLE_LASER_PWM
|
|
|
|
bool spindle_laser_enabled() {
|
|
return !!spindle_laser_power; // READ(SPINDLE_LASER_ENABLE_PIN) == SPINDLE_LASER_ENABLE_INVERT;
|
|
}
|
|
|
|
void set_spindle_laser_enabled(const bool enable) {
|
|
// Enabled by PWM setting elsewhere
|
|
spindle_laser_power = enable ? 255 : 0;
|
|
#if ENABLED(SPINDLE_LASER_PWM)
|
|
update_spindle_laser_power();
|
|
#else
|
|
if (enable) {
|
|
WRITE(SPINDLE_LASER_ENABLE_PIN, SPINDLE_LASER_ENABLE_INVERT);
|
|
delay_for_power_up();
|
|
}
|
|
else {
|
|
WRITE(SPINDLE_LASER_ENABLE_PIN, !SPINDLE_LASER_ENABLE_INVERT);
|
|
delay_for_power_down();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if SPINDLE_DIR_CHANGE
|
|
|
|
void set_spindle_direction(const bool reverse_dir) {
|
|
const bool dir_state = (reverse_dir == SPINDLE_INVERT_DIR); // Forward (M3) HIGH when not inverted
|
|
if (SPINDLE_STOP_ON_DIR_CHANGE && spindle_laser_enabled() && READ(SPINDLE_DIR_PIN) != dir_state)
|
|
set_spindle_laser_enabled(false);
|
|
WRITE(SPINDLE_DIR_PIN, dir_state);
|
|
}
|
|
|
|
#endif
|
|
|
|
void GcodeSuite::M3_M4(const bool is_M4) {
|
|
|
|
planner.synchronize(); // wait until previous movement commands (G0/G0/G2/G3) have completed before playing with the spindle
|
|
|
|
#if SPINDLE_DIR_CHANGE
|
|
set_spindle_direction(is_M4);
|
|
#endif
|
|
|
|
/**
|
|
* Our final value for ocr_val is an unsigned 8 bit value between 0 and 255 which usually means uint8_t.
|
|
* Went to uint16_t because some of the uint8_t calculations would sometimes give 1000 0000 rather than 1111 1111.
|
|
* Then needed to AND the uint16_t result with 0x00FF to make sure we only wrote the byte of interest.
|
|
*/
|
|
#if ENABLED(SPINDLE_LASER_PWM)
|
|
if (parser.seen('O')) {
|
|
spindle_laser_power = parser.value_byte();
|
|
set_spindle_laser_ocr(spindle_laser_power);
|
|
}
|
|
else {
|
|
spindle_laser_power = parser.intval('S', 255);
|
|
update_spindle_laser_power();
|
|
}
|
|
#else
|
|
set_spindle_laser_enabled(true);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* M5 turn off spindle
|
|
*/
|
|
void GcodeSuite::M5() {
|
|
planner.synchronize();
|
|
set_spindle_laser_enabled(false);
|
|
}
|
|
|
|
#endif // SPINDLE_LASER_ENABLE
|