Marlin_Firmware/Marlin/src/feature/caselight.cpp

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/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 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 HAS_CASE_LIGHT
uint8_t case_light_brightness = CASE_LIGHT_DEFAULT_BRIGHTNESS;
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bool case_light_on = CASE_LIGHT_DEFAULT_ON;
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/**
* The following are needed because ARM chips ignore a "WRITE(CASE_LIGHT_PIN,x)" command to the pins that
* are directly controlled by the PWM module. In order to turn them off the brightness level needs to be
* set to off. Since we can't use the pwm register to save the last brightness level we need a variable
* to save it.
*/
uint8_t case_light_brightness_sav; // saves brighness info so can restore when "M355 S1" received
bool case_light_arg_flag; // flag to notify if S or P arguement type
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#ifndef INVERT_CASE_LIGHT
#define INVERT_CASE_LIGHT false
#endif
void update_case_light() {
SET_OUTPUT(CASE_LIGHT_PIN);
if (!(case_light_arg_flag && !case_light_on))
case_light_brightness_sav = case_light_brightness; // save brightness except if this is an S0 arguement
if (case_light_arg_flag && case_light_on)
case_light_brightness = case_light_brightness_sav; // restore last brightens if this is an S1 arguement
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if (case_light_on) {
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if (USEABLE_HARDWARE_PWM(CASE_LIGHT_PIN))
analogWrite(CASE_LIGHT_PIN, INVERT_CASE_LIGHT ? 255 - case_light_brightness : case_light_brightness);
else
WRITE(CASE_LIGHT_PIN, INVERT_CASE_LIGHT ? LOW : HIGH);
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}
else {
if (USEABLE_HARDWARE_PWM(CASE_LIGHT_PIN))
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analogWrite(CASE_LIGHT_PIN, INVERT_CASE_LIGHT ? 255 : 0);
else
WRITE(CASE_LIGHT_PIN, INVERT_CASE_LIGHT ? HIGH : LOW);
}
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}
#endif // HAS_CASE_LIGHT