LVGL仿真

Linux

一、基于SDL2

1. SDL2安装 安装地址URL

   url：http://www.libsdl.org/download-2.0.php
   ./configure 
   make 
   sudo make install

   或者

   sudo apt-get update && sudo apt-get install -y build-essential libsdl2-dev

2. 下载基于SDL2编译的包

   git clone --recursive https://github.com/lvgl/lv_sim_vscode_sdl

3. 编译运行

   ./bulid/bin/demo

   提示error while loading shared libraries libSDL-1.2.so.0
   没找到库，需重新安装

   sudo apt-get install --reinstall libsdl1.2debian

   旧的仿真环境删除，由lv_port_pc_eclipse替换

   https://github.com/lvgl/lv_port_pc_eclipse.git

   CFLAGS ?= -O3 -I$(LVGL_DIR)/ $(WARNINGS) -I../SDL2-2.0.14/_instal/include
   LDFLAGS ?= -L../SDL2-2.0.14/_instal/lib -lSDL2 -lm -lpthread

   运行

   ./demo

二、基于framebuffer

下载源码

git clone --recursive https://github.com/lvgl/lv_port_linux_frame_buffer

编译后 打开命令行终端

ctrl+alt+F2     #(1234)退出F7

Windows

同linux基于SDL2

• 下载windows SDL2

• mingw32安装SDL2
  i686-w64-mingw32复制到环境路径

  where g++

  若提示_beginthreadex _endthreadex错误,则因为mingw32版本不够，需改动main.c

#include <windows.h>
// SDL_CreateThread(tick_thread, "tick", NULL);
CreateThread(NULL,0,tick_thread,0,0,0);

使用lv_port_pc_eclipse

lib/libSDL2.dll.a和include/SDL2放入对应文件夹，删除makefile多余规则

WSL

最简洁

• 安装SDL2库

  sudo apt install libsdl2-dev

• 使用lv_port_pc_vscode

  git clone --recursive https://github.com/lvgl/lv_port_pc_vscode

• 编译运行

  cmake -B build

字体仿真

修改取字库文件

static uint8_t *__user_font_getdata(int offset, int size){
    //如字模保存在SPI FLASH, SPIFLASH_Read(__g_font_buf,offset,size);
    //如字模已加载到SDRAM,直接返回偏移地址即可(sdram_fontddr+offset);
    FILE *fp;
    fp=fopen("/d/myFont2.bin","rb");
    if (fp == 0)
    {
        LV_LOG_WARN("open error");
    }
    else
    {
        // LV_LOG_WARN("open OK");
        fseek(fp,offset,SEEK_SET);
        fread(__g_font_buf,size,1,fp);
        fclose(fp);        
    }
    return __g_font_buf;
}