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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;
- bool case_light_on = CASE_LIGHT_DEFAULT_ON;
-
- /**
- * 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
-
- #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
-
- if (case_light_on) {
- 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);
- }
- else {
- if (USEABLE_HARDWARE_PWM(CASE_LIGHT_PIN))
- analogWrite(CASE_LIGHT_PIN, INVERT_CASE_LIGHT ? 255 : 0 ); // turn the light off
- WRITE(CASE_LIGHT_PIN, INVERT_CASE_LIGHT ? HIGH : LOW);
- }
- }
-
- #endif // HAS_CASE_LIGHT
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