Simulator project for LVGL embedded GUI Library

The LVGL is written mainly for microcontrollers and embedded systems however you can run the library on your PC as well without any embedded hardware. The code written on PC can be simply copied when your are using an embedded system.

Using a PC simulator instead of an embedded hardware has several advantages:

• Costs $0 because you you don't have to buy or design PCB
• Fast because you don't have to design and manufacture PCB
• Collaborative because any number of developers can work in the same environment
• Developer friendly because much easier and faster to debug on PC

Requirements

This project is configured for VSCode and only tested on Linux, although this may work on OSx or WSL. It requires a working version of GCC, GDB and make in your path.

To allow debugging inside VSCode you will also require a GDB extension or other suitable debugger.

• SDL a low level driver library to use graphics, handle mouse, keyboard etc.

Usage

Get the PC project

Clone the PC project and the related sub modules:

git clone --recursive https://github.com/Theo-Tsang/lvgl_v3s_prj

Install SDL

You can download SDL from https://www.libsdl.org/

On on Linux you can install it via terminal:

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

Setup

To allow custom UI code an lv_conf.h file placed at ui/simulator/inc will automatically override this projects lv_conf.h file. By default code under ui is ignored so you can reuse this repository for multiple projects. You will need to place a call from main.c to your UI's entry function.

To build and debug, press F5. You should now have your UI displayed in a new window and can access all the debug features of VSCode through GDB.

To allow temporary modification between simulator and device code, a SIMULATOR=1 define is added globally.

New

lv_examples/src/lv_demo_smarthome -> UI of SmartHome project .

you need to modified main.c

int main(int argc, char **argv)
{
  (void)argc; /*Unused*/
  (void)argv; /*Unused*/

  /*Initialize LVGL*/
  lv_init();            // 初始化lvgl    

  /*Initialize the HAL (display, input devices, tick) for LVGL*/
  hal_init();           // 这里单片机就是硬件初始化，模拟器中是模拟器初始化(修改配置)

  // lv_demo_widgets();    // 这个函数就是演示的demo(修改示例)
  lv_demo_smarthome(0.5);

  while (1) {
    /* Periodically call the lv_task handler.
     * It could be done in a timer interrupt or an OS task too.*/
    lv_task_handler();  // lvgl的任务处理，主要处理事件响应
    usleep(5 * 1000);   // 休眠10ms
  }

  return 0;
}

演示视频：