Snapshot of JC3636W518EN kit before demo folder cleanup
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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/*
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* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "ESP_PanelLog.h"
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#include "ESP_PanelBacklight.h"
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static const char *TAG = "ESP_PanelBacklight";
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ESP_PanelBacklight::ESP_PanelBacklight(int io_num, bool light_up_level, bool use_pwm):
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_is_initialized(false),
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_use_pwm(use_pwm),
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_light_up_level(light_up_level),
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_io_num(io_num),
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_timer_config(ESP_PANEL_BACKLIGHT_LEDC_TIMER_CONFIG_DEFAULT()),
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_channel_config(ESP_PANEL_BACKLIGHT_LEDC_CHANNEL_CONFIG_DEFAULT(io_num, light_up_level))
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{
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}
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ESP_PanelBacklight::ESP_PanelBacklight(const ledc_timer_config_t &timer_config, const ledc_channel_config_t &channel_config):
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_is_initialized(false),
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_use_pwm(true),
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_timer_config(timer_config),
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_channel_config(channel_config)
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{
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}
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ESP_PanelBacklight::~ESP_PanelBacklight()
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{
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ESP_PANEL_ENABLE_TAG_DEBUG_LOG();
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if (!_is_initialized && !del()) {
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ESP_LOGE(TAG, "Delete device failed");
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}
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ESP_LOGD(TAG, "Destroyed");
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}
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bool ESP_PanelBacklight::begin(void)
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{
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ESP_PANEL_CHECK_FALSE_RET(_io_num >= 0, false, "Invalid IO number");
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ESP_PANEL_ENABLE_TAG_DEBUG_LOG();
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ESP_LOGD(TAG, "begin start");
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if (_use_pwm) {
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ESP_LOGD(TAG, "Use PWM(LEDC) to control");
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ESP_PANEL_CHECK_ERR_RET(ledc_timer_config(&_timer_config), false, "LEDC timer config failed");
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ESP_PANEL_CHECK_ERR_RET(ledc_channel_config(&_channel_config), false, "LEDC channel config failed");
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} else {
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ESP_LOGD(TAG, "Use GPIO to control");
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gpio_config_t io_config = ESP_PANEL_BACKLIGHT_GPIO_CONFIG_DEFAULT(_io_num);
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ESP_PANEL_CHECK_ERR_RET(gpio_config(&io_config), false, "GPIO config failed");
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ESP_PANEL_CHECK_ERR_RET(gpio_set_level((gpio_num_t)_io_num, _light_up_level), false, "GPIO set level failed");
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}
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_is_initialized = true;
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ESP_LOGD(TAG, "begin end");
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return true;
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}
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bool ESP_PanelBacklight::setBrightness(uint8_t percent)
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{
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ESP_PANEL_CHECK_FALSE_RET(_is_initialized, false, "Device has not been initialized");
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ESP_LOGD(TAG, "Set brightness to %d%%", percent);
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percent = percent > 100 ? 100 : percent;
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if (_use_pwm) {
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uint32_t duty_cycle = (BIT(_timer_config.duty_resolution) * percent) / 100;
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ledc_channel_t channel = _channel_config.channel;
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ledc_mode_t mode = _channel_config.speed_mode;
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ESP_PANEL_CHECK_ERR_RET(ledc_set_duty(mode, channel, duty_cycle), false, "LEDC set duty failed");
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ESP_PANEL_CHECK_ERR_RET(ledc_update_duty(mode, channel), false, "LEDC update duty failed");
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} else {
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bool level = (percent > 0) ? _light_up_level : !_light_up_level;
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ESP_PANEL_CHECK_ERR_RET(gpio_set_level((gpio_num_t)_io_num, level), false, "GPIO set level failed");
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}
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return true;
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}
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bool ESP_PanelBacklight::on(void)
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{
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return setBrightness(100);
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}
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bool ESP_PanelBacklight::off(void)
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{
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return setBrightness(0);
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}
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bool ESP_PanelBacklight::del(void)
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{
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ESP_PANEL_CHECK_FALSE_RET(_is_initialized, false, "Device has not been initialized");
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if (_use_pwm) {
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ledc_mode_t mode = _channel_config.speed_mode;
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ledc_channel_t channel = _channel_config.channel;
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ESP_PANEL_CHECK_ERR_RET(ledc_stop(mode, channel, _light_up_level), false, "LEDC stop failed");
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} else {
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gpio_reset_pin((gpio_num_t)_io_num);
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}
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_is_initialized = false;
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ESP_LOGD(TAG, "Delete device");
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return true;
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}
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+139
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/*
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* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <stdint.h>
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#include "driver/ledc.h"
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/**
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* @brief Backlight LEDC default configuration macros
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*
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*/
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#define ESP_PANEL_BACKLIGHT_LEDC_TIMER_CONFIG_DEFAULT() \
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{ \
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.speed_mode = LEDC_LOW_SPEED_MODE, \
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.duty_resolution = LEDC_TIMER_10_BIT, \
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.timer_num = LEDC_TIMER_0, \
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.freq_hz = 5000, \
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.clk_cfg = LEDC_AUTO_CLK, \
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}
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#define ESP_PANEL_BACKLIGHT_LEDC_CHANNEL_CONFIG_DEFAULT(io_num, on_level) \
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{ \
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.gpio_num = io_num, \
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.speed_mode = LEDC_LOW_SPEED_MODE, \
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.channel = LEDC_CHANNEL_0, \
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.intr_type = LEDC_INTR_DISABLE, \
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.timer_sel = LEDC_TIMER_0, \
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.duty = 0, \
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.hpoint = 0, \
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.flags = { \
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.output_invert = !on_level, \
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}, \
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}
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/**
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* @brief Backlight GPIO default configuration macro
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*
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*/
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#define ESP_PANEL_BACKLIGHT_GPIO_CONFIG_DEFAULT(io_num) \
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{ \
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.pin_bit_mask = BIT64(io_num), \
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.mode = GPIO_MODE_OUTPUT, \
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.pull_up_en = GPIO_PULLUP_DISABLE, \
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.pull_down_en = GPIO_PULLDOWN_DISABLE, \
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.intr_type = GPIO_INTR_DISABLE, \
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}
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/**
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* @brief The backlight device class
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*
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*/
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class ESP_PanelBacklight {
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public:
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/**
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* @brief Construct a new backlight device in a simple way, the `begin()` function should be called after this
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*
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* @note This function uses some default values to config the backlight device, please use `config*()` functions to
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* change them
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*
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* @param io_num GPIO number
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* @param light_up_level Level when light up
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* @param use_pwm Use PWM(LEDC) if set to true
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*/
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ESP_PanelBacklight(int io_num, bool light_up_level, bool use_pwm);
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/**
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* @brief Construct a new backlight device with using PWM(LEDC) in a complex way, the `begin()` function should be
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* called after this
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*
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* @param timer_config LEDC timer configuration
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* @param channel_config LEDC channel configuration
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*/
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ESP_PanelBacklight(const ledc_timer_config_t &timer_config, const ledc_channel_config_t &channel_config);
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/**
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* @brief Destroy the backlight device
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*
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*/
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~ESP_PanelBacklight();
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/**
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* @brief Startup the backlight device
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*
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* @return true if success, otherwise false
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*/
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bool begin(void);
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/**
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* @brief Set the brightness of the backlight by percent
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*
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* @note This function should be called after `begin()`
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* @note When not using PWM, calling this function only controls the backlight switch and cannot adjust
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* the brightness
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*
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* @param percent The brightness percent, 0-100
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*
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* @return true if success, otherwise false
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*/
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bool setBrightness(uint8_t percent);
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/**
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* @brief Turn on the backlight
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*
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* @note This function should be called after `begin()`
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* @note This function is same as `setBrightness(100)`
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*
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* @return true if success, otherwise false
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*/
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bool on(void);
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/**
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* @brief Turn off the backlight
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*
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* @note This function should be called after `begin()`
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* @note This function is same as `setBrightness(0)`
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*
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* @return true if success, otherwise false
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*/
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bool off(void);
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/**
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* @brief Delete the backlight device, release the resources
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*
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* @note This function should be called after `begin()`
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*
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* @return true if success, otherwise false
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*/
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bool del(void);
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private:
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bool _is_initialized;
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bool _use_pwm;
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bool _light_up_level;
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uint8_t _io_num;
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ledc_timer_config_t _timer_config;
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ledc_channel_config_t _channel_config;
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};
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