1.项目结构
在 aithinker_Ai-M6X_SDK\examples\lvgl\demos目录中新建一个文件夹, 可以直接cv lvgl文件夹修改, 例如我新建的目录 lvgltest2 结构如下
image.png
2.项目代码
1) 页面代码
在demos目录中新建test(名称自定)文件夹, 新建 lv_demo_test.c和 lv_demo_test.h文件,来编写页面代码
lv_demo_test.h文件, 用来定义方法和引入依赖
/**
* @file lv_demo_test.h
*
*/
#ifndef LV_DEMO_TEST_H
#define LV_DEMO_TEST_H
#ifdef __cplusplus
extern "C" {
#endif
/*********************
* INCLUDES
*********************/
#include "../lv_demos.h"
/**********************
* GLOBAL PROTOTYPES
**********************/
void lv_demo_test(void);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /*LV_DEMO_TEST_H*/
lv_demo_test.c 文件用来写页面代码, 添加一个标题, 创建两个button
-
lv_theme_default_init()设置主题 -
lv_scr_act()获取当前屏幕指针 -
lv_style_init()样式对象初始化 -
lv_style_set_text_opa()设置样式 -
lv_label_create()创建文本 -
lv_label_set_text()设置文本值 -
lv_obj_add_style()设置定义的样式 -
lv_btn_create()创建按钮 -
lv_obj_set_pos()设置位置坐标
/**
* @file lv_demo_test.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_demo_test.h"
#if LV_USE_DEMO_TEST
#if LV_MEM_CUSTOM == 0 && LV_MEM_SIZE < (38ul * 1024ul)
#error Insufficient memory for lv_demo_widgets. Please set LV_MEM_SIZE to at least 38KB (38ul * 1024ul). 48KB is recommended.
#endif
/**********************
* TYPEDEFS
**********************/
// 定义枚举, 三种屏幕大小
typedef enum {
DISP_SMALL,
DISP_MEDIUM,
DISP_LARGE,
} disp_size_t;
/**********************
* STATIC PROTOTYPES
**********************/
/**********************
* STATIC VARIABLES
**********************/
static disp_size_t disp_size;
static lv_style_t style_text_opacity;
static lv_style_t style_title;
static const lv_font_t * font_large;
static const lv_font_t * font_normal;
/**********************
* GLOBAL FUNCTIONS
**********************/
void lv_demo_test(void) {
// 判断设备尺寸
if(LV_HOR_RES <= 320) disp_size = DISP_SMALL;
else if(LV_HOR_RES < 720) disp_size = DISP_MEDIUM;
else disp_size = DISP_LARGE;
// 先将large字体和normal字体修改为默认大小
font_large = LV_FONT_DEFAULT;
font_normal = LV_FONT_DEFAULT;
// 根据屏幕大小 设置字体大小
if (disp_size == DISP_LARGE) {
#if LV_FONT_MONTSERRAT_24
font_large = &lv_font_montserrat_24;
#else
LV_LOG_WARN("LV_FONT_MONTSERRAT_24 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
#endif
#if LV_FONT_MONTSERRAT_16
font_normal = &lv_font_montserrat_16;
#else
LV_LOG_WARN("LV_FONT_MONTSERRAT_16 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
#endif
} else if (disp_size == DISP_MEDIUM) {
#if LV_FONT_MONTSERRAT_20
font_large = &lv_font_montserrat_20;
#else
LV_LOG_WARN("LV_FONT_MONTSERRAT_20 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
#endif
#if LV_FONT_MONTSERRAT_14
font_normal = &lv_font_montserrat_14;
#else
LV_LOG_WARN("LV_FONT_MONTSERRAT_14 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
#endif
} else { /* disp_size == DISP_SMALL */
#if LV_FONT_MONTSERRAT_18
font_large = &lv_font_montserrat_18;
#else
LV_LOG_WARN("LV_FONT_MONTSERRAT_18 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
#endif
#if LV_FONT_MONTSERRAT_12
font_normal = &lv_font_montserrat_12;
#else
LV_LOG_WARN("LV_FONT_MONTSERRAT_12 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
#endif
}
#if LV_USE_THEME_DEFAULT
// 设置默认主题
lv_theme_default_init(
NULL, // 没指定 则为默认主题
lv_palette_main(LV_PALETTE_BLUE), // 主颜色为蓝色
lv_palette_main(LV_PALETTE_RED), // 次颜色为红色
LV_THEME_DEFAULT_DARK, // 设置主题为暗色模式
font_normal // 字体
);
#endif
// 设置字体透明度
lv_style_init(&style_text_opacity);
lv_style_set_text_opa(&style_text_opacity, LV_OPA_50);
// 设置标题字体大小
lv_style_init(&style_title);
lv_style_set_text_font(&style_title, font_large);
// 标题
lv_obj_t * title = lv_label_create(lv_scr_act());
lv_label_set_text(title, "Test Title");
lv_obj_add_style(title, &style_title, 0);
lv_obj_add_style(title, &style_text_opacity, 0);
// 创建按钮
lv_obj_t * btn1 = lv_btn_create(lv_scr_act());
// 设置定位
lv_obj_set_pos(btn1, 60, 40);
// 复制btn1
lv_obj_t * btn2 = lv_btn_create(lv_scr_act());
// 设置定位
lv_obj_set_pos(btn2, 60, 80);
// 给按钮添加文字
lv_obj_t * label1 = lv_label_create(btn1);
lv_label_set_text(label1, "Button 1");
lv_obj_t * label2 = lv_label_create(btn2);
lv_label_set_text(label2, "Button 2");
}
#endif
2) 配置页面代码
在 demos/lv_demos.h 文件中引入 lv_demo_test.h文件, 也可以不用判断LV_USE_DEMO_TEST, 我这主要沿用了之前lvgl项目的代码
/**
* @file lv_demos.h
*
*/
#ifndef LV_DEMOS_H
#define LV_DEMOS_H
#ifdef __cplusplus
extern "C" {
#endif
/*********************
* INCLUDES
*********************/
#include "lvgl.h"
#if LV_USE_DEMO_TEST
#include "test/lv_demo_test.h"
#endif
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /*LV_DEMO_H*/
在 lvgltest2\lv_conf.h文件 可以看到 lvgltest2\lv_conf.h文件中还有其他配置, 用来开放lvgl的一些功能, 比如开放button功能等, 默认这些都是开启的
image.png
配置 LV_USE_DEMO_TEST为1, 引入刚刚写的页面
image.png
3) 执行代码
main.c 执行 lv_demo_test 方法
- 初始化开发板
- 初始化lvgl
- 初始化显示驱动
- 初始化输入设备驱动
- 绘制屏幕
- 循环执行任务队列
/**
* @file main.c
* @brief
*
* Copyright (c) 2021 Bouffalolab team
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
*
*/
#include "board.h"
#include "bflb_gpio.h"
#include "bflb_l1c.h"
#include "bflb_mtimer.h"
#include "lv_conf.h"
#include "lvgl.h"
#include "lv_port_disp.h"
#include "lv_port_indev.h"
#include "lcd.h"
#include "demos/lv_demos.h"
/* lvgl log cb */
void lv_log_print_g_cb(const char *buf)
{
printf("[LVGL] %s", buf);
}
int main(void)
{
board_init();
printf("lvgl case\r\n");
/* lvgl init */
lv_log_register_print_cb(lv_log_print_g_cb);
lv_init();
// 初始化显示驱动
lv_port_disp_init();
// 初始化输入设备驱动
lv_port_indev_init();
// 屏幕绘制
lv_demo_test();
// 任务队列用于管理后台任务，例如绘制屏幕、处理用户输入等
lv_task_handler();
printf("lvgl success\r\n");
while (1) {
lv_task_handler();
bflb_mtimer_delay_ms(1);
}
}
3. 结果
image.png
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