devttl/xiaozhi-esp32
1
0
Fork 0
forked from xiaozhi/xiaozhi-esp32
Code Pull Requests Activity

使用定时器调节屏幕亮度

Browse Source
This commit is contained in:
Terrence
2025-02-14 01:15:10 +08:00
parent 9b8db4a551
commit 8ace1095e9
6 changed files with 75 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
main/display/lcd_display.cc
View File

@@ -6,6 +6,8 @@
#include <driver/ledc.h>
#include <vector>
#include <esp_lvgl_port.h>
#include <esp_timer.h>
#include "board.h"
#define TAG "LcdDisplay"
@@ -13,7 +15,6 @@
LV_FONT_DECLARE(font_awesome_30_4);
LcdDisplay::LcdDisplay(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_t panel,
gpio_num_t backlight_pin, bool backlight_output_invert,
int width, int height, int offset_x, int offset_y, bool mirror_x, bool mirror_y, bool swap_xy,
@@ -23,6 +24,18 @@ LcdDisplay::LcdDisplay(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_
width_ = width;
height_ = height;
// 创建背光渐变定时器
const esp_timer_create_args_t timer_args = {
.callback = [](void* arg) {
LcdDisplay* display = static_cast<LcdDisplay*>(arg);
display->OnBacklightTimer();
},
.arg = this,
.dispatch_method = ESP_TIMER_TASK,
.name = "backlight_timer",
.skip_unhandled_events = true,
};
ESP_ERROR_CHECK(esp_timer_create(&timer_args, &backlight_timer_));
InitializeBacklight(backlight_pin);
// draw white
@@ -79,12 +92,16 @@ LcdDisplay::LcdDisplay(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_
lv_display_set_offset(display_, offset_x, offset_y);
}
SetBacklight(100);
SetupUI();
SetBacklight(brightness_);
}
LcdDisplay::~LcdDisplay() {
if (backlight_timer_ != nullptr) {
esp_timer_stop(backlight_timer_);
esp_timer_delete(backlight_timer_);
}
// 然后再清理 LVGL 对象
if (content_ != nullptr) {
lv_obj_del(content_);
@@ -132,7 +149,7 @@ void LcdDisplay::InitializeBacklight(gpio_num_t backlight_pin) {
.speed_mode = LEDC_LOW_SPEED_MODE,
.duty_resolution = LEDC_TIMER_10_BIT,
.timer_num = LEDC_TIMER_0,
.freq_hz = 20000,//背光pwm频率需要高一点，防止电感啸叫
.freq_hz = 20000, //背光pwm频率需要高一点，防止电感啸叫
.clk_cfg = LEDC_AUTO_CLK,
.deconfigure = false
};
@@ -141,6 +158,23 @@ void LcdDisplay::InitializeBacklight(gpio_num_t backlight_pin) {
ESP_ERROR_CHECK(ledc_channel_config(&backlight_channel));
}
void LcdDisplay::OnBacklightTimer() {
if (current_brightness_ < brightness_) {
current_brightness_++;
} else if (current_brightness_ > brightness_) {
current_brightness_--;
}
// LEDC resolution set to 10bits, thus: 100% = 1023
uint32_t duty_cycle = (1023 * current_brightness_) / 100;
ledc_set_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH, duty_cycle);
ledc_update_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH);
if (current_brightness_ == brightness_) {
esp_timer_stop(backlight_timer_);
}
}
void LcdDisplay::SetBacklight(uint8_t brightness) {
if (backlight_pin_ == GPIO_NUM_NC) {
return;
@@ -151,10 +185,12 @@ void LcdDisplay::SetBacklight(uint8_t brightness) {
}
ESP_LOGI(TAG, "Setting LCD backlight: %d%%", brightness);
// LEDC resolution set to 10bits, thus: 100% = 1023
uint32_t duty_cycle = (1023 * brightness) / 100;
ESP_ERROR_CHECK(ledc_set_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH, duty_cycle));
ESP_ERROR_CHECK(ledc_update_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH));
// 停止现有的定时器（如果正在运行）
esp_timer_stop(backlight_timer_);
Display::SetBacklight(brightness);
// 启动定时器，每 5ms 更新一次
ESP_ERROR_CHECK(esp_timer_start_periodic(backlight_timer_, 5 * 1000));
}
bool LcdDisplay::Lock(int timeout_ms) {