120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
//backlight.cpp
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#include "backlight.h"
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#include "macros.h"
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#include <avr/eeprom.h>
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#include <Arduino.h>
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#include "eeprom.h"
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#include "pins.h"
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#include "fastio.h"
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#include "Timer.h"
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#ifdef LCD_BL_PIN
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#define BL_FLASH_DELAY_MS 25
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bool backlightSupport = 0; //only if it's true will any of the settings be visible to the user
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int16_t backlightLevel_HIGH = 0;
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int16_t backlightLevel_LOW = 0;
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uint8_t backlightMode = BACKLIGHT_MODE_BRIGHT;
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int16_t backlightTimer_period = 10;
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LongTimer backlightTimer;
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static void backlightTimer_reset() //used for resetting the timer and waking the display. Triggered on user interactions.
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{
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if (!backlightSupport) return;
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backlightTimer.start();
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backlight_update();
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}
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void force_bl_on(bool section_start)
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{
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if (section_start)
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{
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backlightMode = BACKLIGHT_MODE_BRIGHT;
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if (backlightLevel_HIGH < 30) backlightLevel_HIGH = 30;
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}
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else
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{
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backlightMode = eeprom_read_byte((uint8_t *)EEPROM_BACKLIGHT_MODE);
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backlightLevel_HIGH = eeprom_read_byte((uint8_t *)EEPROM_BACKLIGHT_LEVEL_HIGH);
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}
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backlight_update();
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}
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void backlight_wake(const uint8_t flashNo)
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{
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if (!backlightSupport) return;
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if (flashNo)
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{
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uint8_t backlightMode_bck = backlightMode;
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for (uint8_t i = 0; i < (((backlightMode_bck == BACKLIGHT_MODE_AUTO) && !backlightTimer.running()) + (flashNo * 2)); i++)
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{
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backlightMode = !backlightMode; //toggles between BACKLIGHT_MODE_BRIGHT and BACKLIGHT_MODE_DIM
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backlight_update();
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_delay(BL_FLASH_DELAY_MS);
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}
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backlightMode = backlightMode_bck;
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}
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backlightTimer_reset();
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}
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void backlight_save() //saves all backlight data to eeprom.
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{
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eeprom_update_byte((uint8_t *)EEPROM_BACKLIGHT_LEVEL_HIGH, (uint8_t)backlightLevel_HIGH);
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eeprom_update_byte((uint8_t *)EEPROM_BACKLIGHT_LEVEL_LOW, (uint8_t)backlightLevel_LOW);
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eeprom_update_byte((uint8_t *)EEPROM_BACKLIGHT_MODE, backlightMode);
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eeprom_update_word((uint16_t *)EEPROM_BACKLIGHT_TIMEOUT, backlightTimer_period);
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}
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void backlight_update()
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{
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if (!backlightSupport) return;
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if (backlightMode == BACKLIGHT_MODE_AUTO)
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{
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if (backlightTimer.expired((uint32_t)backlightTimer_period * 1000ul)) analogWrite(LCD_BL_PIN, backlightLevel_LOW);
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else if (backlightTimer.running()) analogWrite(LCD_BL_PIN, backlightLevel_HIGH);
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else {/*do nothing*/;} //display is dimmed.
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}
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else if (backlightMode == BACKLIGHT_MODE_DIM) analogWrite(LCD_BL_PIN, backlightLevel_LOW);
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else analogWrite(LCD_BL_PIN, backlightLevel_HIGH);
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}
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void backlight_init()
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{
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//check for backlight support on lcd
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SET_INPUT(LCD_BL_PIN);
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WRITE(LCD_BL_PIN,HIGH);
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_delay(10);
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backlightSupport = !READ(LCD_BL_PIN);
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if (!backlightSupport) return;
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//initialize backlight
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backlightMode = eeprom_read_byte((uint8_t *)EEPROM_BACKLIGHT_MODE);
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if (backlightMode == 0xFF) //set default values
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{
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backlightMode = BACKLIGHT_MODE_AUTO;
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backlightLevel_HIGH = 130;
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backlightLevel_LOW = 50;
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backlightTimer_period = 10; //in seconds
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backlight_save();
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}
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backlightLevel_HIGH = eeprom_read_byte((uint8_t *)EEPROM_BACKLIGHT_LEVEL_HIGH);
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backlightLevel_LOW = eeprom_read_byte((uint8_t *)EEPROM_BACKLIGHT_LEVEL_LOW);
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backlightTimer_period = eeprom_read_word((uint16_t *)EEPROM_BACKLIGHT_TIMEOUT);
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SET_OUTPUT(LCD_BL_PIN);
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backlightTimer_reset();
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}
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#else //LCD_BL_PIN
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void force_bl_on(_UNUSED bool section_start) {}
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void backlight_update() {}
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void backlight_init() {}
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void backlight_save() {}
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void backlight_wake(_UNUSED const uint8_t flashNo) {}
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#endif //LCD_BL_PIN
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