# Compile SDK
Compile SSD201 SDK

## Compile uboot

- Environment configuration

  ```shell
  export ARCH="arm"
  export CROSS_COMPILE=arm-linux-gnueabihf-
  ```

-  Select model related config

  ```shell
  # Config file directory ssd20x-uboot-open/configs, compile WT2012
  make WT2012_defconfig
  ```

- Compile

  ```shell
  make clean
  make -j4
  ```

- **Replace flash images**

  ```shell
  cp ${SDK_PATH}/ssd20x-uboot-open/u-boot_spinand.xz.img.bin ${SDK_PATH}/ssd20x-images-open/WT2012/boot/u-boot_spinand.xz.img.bin
  cp ${SDK_PATH}/ssd20x-uboot-open/u-boot_spinand.xz.img.bin ${SDK_PATH}/ssd20x-images-open/WT2012/uboot_s.bin
  ```
  
- Flash selection

  ```shell
  cd ${SDK_PATH}/ssd20x-images-open/partition
  ./part.sh # The default flash configuration is 128MB (1Gbit). 256MB (2Gbit) flash requires 2G parameters.
  cp cis.bin ${SDK_PATH}/ssd20x-images-open/WT2012
  ```
  
- For a detailed introduction to the binary files involved in UBOOT partition creation, please refer to: [Development - Application Development Reference - System Related - SSD_System Partition](http://wx.comake.online/doc/doc/TAKOYAKI_DLC00V050_20211216/)


## Compile kernel

- Environment configuration

  ```shell
  export ARCH="arm"
  export CROSS_COMPILE=arm-linux-gnueabihf-
  ```

- Select model config

  ```shell
  #Config file driectory ssd20x-kernel-open/arch/arm/configs
  cd ${SDK_PATH}/ssd20x-kernel-open
  make WT2012_defconfig
  ```
  
- Compile

  ```shell
  make clean
  make -j4
  ```

- **Replace images**

  ```shell
  cp ./arch/arm/boot/uImage.xz ${SDK_PATH}/ssd20x-images-open/WT2012/kernel
  ```

## Make file system

- The ubi partition file system is in the `ssd20x-rootfs-open/ssd20x` directory. Unzip the file system and add custom software to make it effective. It is unnecessary to compile the system image for the second time. Take adding applications in 'ssd202' as an example:

  ```shell
  cd ${SDK_PATH}/ssd20x-rootfs-open/ssd201
  tar zxvf root-sstar.tar.gz  # root-sstar.tar.gz is the root-sstar generated by compiling openwrt
  cp ${Youer_Files} ${SDK_PATH}/ssd20x-rootfs-open/ssd201/root-sstar/usr
  ```
  
- After adding the file, execute the packaging scripts of the corresponding partition file system

  ```shell
  sudo apt-get install mtd-utils # Packaging dependencies mtd-utils. You need to install this tool in advance
  cd ${SDK_PATH}/ssd20x-rootfs-open
  ./mk_tools.sh
  ./mk_ubi.sh ssd201
  ```

- Replace

  ```shell
  mv root.ubi ${SDK_PATH}/ssd20x-images-open/WT2012
  ```

## Compile openwrt

-  If openwrt supports additional software functions, it is necessary to compile the sdk and replace images. But if you simply develop UI or drivers, you don't need to perform these steps:

  ```shell
  #Get openwrt source code
  git clone https://gitee.com/qiming-zhixian/ssd2xx-openwrt-open.git
  cd ssd2xx-openwrt-open
  git clone https://gitee.com/qiming-zhixian/ssd20x-kernel-open.git
  cd 18.06
  #Update download package feeds
  export GIT_SSL_NO_VERIFY=1
  ./scripts/feeds update -a
  ./scripts/feeds install -a
  #Make the adapted model config effective -> 18.06/wtconfig/WT2xxx
  make WT2012_wt
  #Compile and generate images path18.06/bin/targets/sstar/ssd20x/WT2012
  make V=s -j4
  #Replace flash images
  cp bin/targets/sstar/ssd20x/WT2012/WT2012-uImage.xz ${SDK_PATH}/ssd20x-images-open/WT2012/kernel
  cp bin/targets/sstar/ssd20x/WT2012/WT2012-root-ubi.img ${SDK_PATH}/ssd20x-images-open/WT2012/root.ubi
  ```