91 lines
2.2 KiB
C++
91 lines
2.2 KiB
C++
/*
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* Copyright (C) EdgeTX
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*
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* Based on code named
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* opentx - https://github.com/opentx/opentx
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* th9x - http://code.google.com/p/th9x
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* er9x - http://code.google.com/p/er9x
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* gruvin9x - http://code.google.com/p/gruvin9x
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*
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* License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "hal/gpio.h"
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#include "stm32_gpio.h"
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#include "stm32_timer.h"
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#include "edgetx_types.h"
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#include "board.h"
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#include "globals.h"
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#include "lcd_driver.h"
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void backlightLowInit( void )
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{
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gpio_init(BACKLIGHT_GPIO, GPIO_OUT, GPIO_PIN_SPEED_LOW);
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gpio_clear(BACKLIGHT_GPIO);
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}
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void backlightInit()
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{
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// PIN init
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gpio_init_af(BACKLIGHT_GPIO, BACKLIGHT_GPIO_AF, GPIO_PIN_SPEED_LOW);
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stm32_timer_enable_clock(BACKLIGHT_TIMER);
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BACKLIGHT_TIMER->ARR = 100;
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BACKLIGHT_TIMER->PSC = BACKLIGHT_TIMER_FREQ / 1000000 - 1; // 10kHz (same as FrOS)
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BACKLIGHT_TIMER->CCMR1 = TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1PE; // PWM mode 1
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BACKLIGHT_TIMER->CCER = TIM_CCER_CC1E | TIM_CCER_CC1NE;
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BACKLIGHT_TIMER->CCR1 = 0;
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BACKLIGHT_TIMER->EGR = TIM_EGR_UG;
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BACKLIGHT_TIMER->CR1 |= TIM_CR1_CEN; // Counter enable
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BACKLIGHT_TIMER->BDTR |= TIM_BDTR_MOE;
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}
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uint8_t lastDutyCycle = 0;
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void backlightEnable(uint8_t dutyCycle)
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{
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BACKLIGHT_TIMER->CCR1 = dutyCycle;
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if(!dutyCycle) {
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//experimental to turn off LCD when no backlight
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if(lcdOffFunction) lcdOffFunction();
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}
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else if(!lastDutyCycle) {
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if(lcdOnFunction) lcdOnFunction();
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else lcdInit();
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}
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lastDutyCycle = dutyCycle;
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}
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void backlightFullOn()
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{
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backlightEnable(BACKLIGHT_LEVEL_MAX);
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}
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void lcdOff() {
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backlightEnable(0);
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}
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void lcdOn() {
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if(lcdOnFunction) lcdOnFunction();
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else lcdInit();
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backlightEnable(BACKLIGHT_LEVEL_MAX);
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}
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bool boardBacklightOn;
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bool isBacklightEnabled()
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{
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return boardBacklightOn;
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}
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