88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
/*
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* Copyright (C) OpenTX
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*
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* Based on code named
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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 "opentx.h"
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void backlightInit()
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{
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// PIN init
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.GPIO_Pin = BACKLIGHT_GPIO_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_Init(BACKLIGHT_GPIO, &GPIO_InitStructure);
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GPIO_PinAFConfig(BACKLIGHT_GPIO, BACKLIGHT_GPIO_PinSource, BACKLIGHT_GPIO_AF);
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// TIMER init
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#if defined(PCBX12S)
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if (IS_HORUS_PROD()) {
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BACKLIGHT_TIMER->ARR = 100;
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BACKLIGHT_TIMER->PSC = BACKLIGHT_TIMER_FREQ / 10000 - 1; // 1kHz
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BACKLIGHT_TIMER->CCMR2 = TIM_CCMR2_OC4M_1 | TIM_CCMR2_OC4M_2; // PWM
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BACKLIGHT_TIMER->CCER = TIM_CCER_CC4E;
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BACKLIGHT_TIMER->CCR4 = 0;
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BACKLIGHT_TIMER->EGR = 0;
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BACKLIGHT_TIMER->CR1 = TIM_CR1_CEN; // Counter enable
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}
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else {
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BACKLIGHT_TIMER->ARR = 100;
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BACKLIGHT_TIMER->PSC = BACKLIGHT_TIMER_FREQ / 10000 - 1; // 1kHz
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BACKLIGHT_TIMER->CCMR1 = TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2; // PWM
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BACKLIGHT_TIMER->CCER = TIM_CCER_CC1E | TIM_CCER_CC1NE;
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BACKLIGHT_TIMER->CCR1 = 100;
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BACKLIGHT_TIMER->EGR = 1;
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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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#elif defined(PCBX10)
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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->CCMR2 = TIM_CCMR2_OC3M_1 | TIM_CCMR2_OC3M_2 | TIM_CCMR2_OC3PE; // PWM mode 1
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BACKLIGHT_TIMER->CCER = TIM_CCER_CC3E | TIM_CCER_CC3NE;
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BACKLIGHT_TIMER->CCR3 = 100;
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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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#endif
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}
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void backlightEnable(uint8_t dutyCycle)
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{
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#if defined(PCBX12S)
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if (IS_HORUS_PROD()) {
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BACKLIGHT_TIMER->CCR4 = dutyCycle;
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}
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else {
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BACKLIGHT_TIMER->CCR1 = BACKLIGHT_LEVEL_MAX - dutyCycle;
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}
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#elif defined(PCBX10)
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BACKLIGHT_TIMER->CCR3 = BACKLIGHT_LEVEL_MAX - dutyCycle;
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#endif
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if (dutyCycle == 0) {
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BACKLIGHT_TIMER->BDTR &= ~TIM_BDTR_MOE;
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}
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else if ((BACKLIGHT_TIMER->BDTR & TIM_BDTR_MOE) == 0) {
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BACKLIGHT_TIMER->BDTR |= TIM_BDTR_MOE;
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}
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}
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