# External
(lcd_driver_Modem)=
## Overview

Mainly used for repositories of SDK 2.4 and later. This method is recommended: place the display driver outside the SDK to run, and create a new display driver.
<br>
## Directory structure 

Here, the sf32lb52-lcd_n16r8 board, display module (nv3051f display driver + gt911 touch driver), and aw9364 backlight driver chip are used as examples:<br>
```
nv3051f_driver
│
├──NV3051F
│   ├──nv3051f
│   │   ├──nv3051f           #屏驱的实现
│   │   └──SConscript        #编译链接文件
│   │
│   ├──gt911                #gt911触控驱动的目录
│   │   ├──gt911.c          #触控驱动的c文件
│   │   ├──gt911.h          #触控驱动的头文件
│   │   └──SConscript        #编译链接文件
│   │
│   ├──aw9364                #aw9364背光驱动芯片，背光设备“lcdlight”
│   │   ├──aw9364.c          #背光驱动芯片的c文件
│   │   ├──aw9364.h          #背光驱动芯片的头文件
│   │   └──SConscript        #编译链接文件
│   │ 
│   ├──project
│   │   └──Kconfig.proj      #屏幕模组的menuconfig菜单定义和屏驱IC、触控IC、背光IC的宏定义处
│   │
│   └──src
│       ├──main              #屏幕调试工程, 调用“lcd”和“touch"设备
│       └──SConscript        #编译链接文件
│ 
└──SiFli-SDK
```
## Pull the SiFli-SDK repository code.
First install the required environment. You can refer to [Quick Start](https://docs.sifli.com/projects/sdk/latest/sf32lb52x/quickstart/index.html). If you have already installed the environment, you can directly [pull the SDK repository code](https://docs.sifli.com/projects/sdk/latest/sf32lb52x/quickstart/install/script/windows.html#sifli-sdk).