板子做工精致很有份量，拿在手里沉甸甸的，各种接口一应俱全——USB、TF 卡座、SIM卡座、4G模块卡座、网口、RGB LCD接口、LVDS、RS485、CAN、各种音频口、TV-in/TV-Out，板上还自带一个RTL8723du wifi/蓝牙二合一模块，作为一块主打工业控制的主控板这些接口实属绰绰有余了。手里的板子是256MB内存 256MB nand flash版本（这个是低配版本，还有个512MB 8GB emmc的高配版本），飞凌开发文档中提到已经移植好了Qt5开发环境，所以这个内存跑跑Qt的UI程序是再合适不过了，可惜手里没有匹配的开箱即用的LCD显示屏不然接上直接能试试出厂自带的Qt测试程序了。
提供的开发资料中已经包含有Ubuntu 20.04 的虚拟机文件，因为是直接用的Linux版本系统，所以需要自己搭建开发环境，以下所涉内容都是在装有Ubuntu 20.04的PC上进行操作，而且，因为以前在安装过T113-S3的开发环境，所以在编译SDK过程中并没有碰到其他因缺少依赖软件报的错误。
T113-i longan linux开发环境搭建
解压sdk
代码语言：javascript复制cat OK113i-linux-sdk.tar.bz2* | tar jx -C ~/Dev/sdk/T113-i/编译前的准备
除了 gcc，ncurse，bison，autoconf，wget，patch，texinfo，zlib，dos2unix 之外需要安装如下：
代码语言：javascript复制sudo apt-get install git
sudo apt-get install gnupg
sudo apt-get install flex
sudo apt-get install bison
sudo apt-get install gperf
sudo apt-get install build-essential
sudo apt-get install zip
sudo apt-get install curl
sudo apt-get install libc6-dev
sudo apt-get install libncurses5-dev:i386
sudo apt-get install x11proto-core-dev
sudo apt-get install libx11-dev:i386
sudo apt-get install libreadline6-dev:i386
sudo apt-get install libgl1-mesa-glx:i386
sudo apt-get install libgl1-mesa-dev
sudo apt-get install g -multilib
sudo apt-get install mingw32
sudo apt-get install tofrodos
sudo apt-get install python-markdown
sudo apt-get install libxml2-utils
sudo apt-get install xsltproc
sudo apt-get install zlib1g-dev:i386
sudo apt-get install gawk
sudo dpkg-reconfigure dash 选择no
sudo apt-get install libgl1-mesa-dev:i386
sudo apt install u-boot-tools初次编译内核
代码语言：javascript复制./build.sh config
Welcome to mkscript setup progress
All available platform:
0. linux
Choice [linux]: 0
All available board:
0. ok113i
Choice [ok113i]: 0
All available flash:
0. default
1. nor
2. nand
Choice [default]: 0
All available display_type:
0. tvout_pal
1. tvout_ntsc
2. lcd_800x480
3. lcd_1024x600
4. mipi_1024x600
5. lvds_1280x800
Choice [tvout_pal]: 2
Relocating the buildroot SDK from /home/forlinx/work/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host to /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host ...
/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk
File "<string>", line 1
import os.path; print os.path.relpath('/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/arch/arm/configs/OK113I_linux_defconfig', '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/arch/arm/configs')
^
SyntaxError: invalid syntax
ERROR: Can't find kernel defconfig!python 报系统库语法错误，根据经验是系统python版本问题，首先查看系统中python版本号
代码语言：javascript复制python --version
Python 3.8.10不出意外的话编译系统依赖python 2.7，所以切换到python 2.7版本，具体操作如下： 首先，查看系统有几个python版本
代码语言：javascript复制update-alternatives --list python
/usr/bin/python2
/usr/bin/python3然后，通过如下切换到想要的版本
代码语言：javascript复制update-alternatives --config python
There are 2 choices for the alternative python (providing /usr/bin/python).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/bin/python3 2 auto mode
1 /usr/bin/python2 1 manual mode
2 /usr/bin/python3 2 manual mode
Press <enter> to keep the current choice[*], or type selection number: 1切换后，再确认python 版本：
代码语言：javascript复制python --version
Python 2.7.18最后再试一次：
代码语言：javascript复制./build.sh config
Welcome to mkscript setup progress
All available platform:
0. linux
Choice [linux]: 0
All available board:
0. ok113i
Choice [ok113i]: 0
All available flash:
0. default
1. nor
2. nand
Choice [default]: 0
All available display_type:
0. tvout_pal
1. tvout_ntsc
2. lcd_800x480
3. lcd_1024x600
4. mipi_1024x600
5. lvds_1280x800
Choice [lcd_1024x600]: 2
This buildroot SDK has already been relocated!
/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk
INFO: kernel defconfig: generate /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/.config by /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/arch/arm/configs/OK113I_linux_defconfig
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
HOSTCC scripts/kconfig/confdata.o
HOSTCC scripts/kconfig/expr.o
LEX scripts/kconfig/lexer.lex.c
YACC scripts/kconfig/parser.tab.[ch]
HOSTCC scripts/kconfig/lexer.lex.o
HOSTCC scripts/kconfig/parser.tab.o
HOSTCC scripts/kconfig/preprocess.o
HOSTCC scripts/kconfig/symbol.o
HOSTLD scripts/kconfig/conf
*** Default configuration is based on 'OK113I_linux_defconfig'
#
# configuration written to .config
#
make: Entering directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/buildroot/buildroot-201902'
GEN /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/Makefile
Config.in.legacy:1769:warning: choice value used outside its choice group
/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/buildroot/buildroot-201902/configs/OK113I_linux_defconfig:3159:warning: override: reassigning to symbol BR2_PACKAGE_OTA_BURNBOOT
#
# configuration written to /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/.config
#
make: Leaving directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/buildroot/buildroot-201902'
INFO: buildroot defconfig is OK113I_linux_defconfig 编译内核试试：
代码语言：javascript复制./build.sh kernel
ACTION List: mkkernel;========
Execute command: mkkernel
INFO: build kernel ...
INFO: prepare_buildserver
INFO: Prepare toolchain ...
toolchain_archivedir=/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/build/toolchain/gcc-linaro-5.3.1-2016.05-x86_64_arm-linux-gnueabi.tar.xz
build server start.
(cd /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/build && [ -x mkkernel.sh ] && ./mkkernel.sh)
CLEAN scripts/basic
CLEAN scripts/kconfig
CLEAN include/config include/generated
CLEAN .config
Using default config /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/arch/arm/configs/OK113I_linux_defconfig ...
make[1]: Entering directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/build'
......
......
make[1]: Leaving directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/build'
[NAND]: Build module driver
make: Entering directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/modules/nand'
[NAND] NOT buid as ko
make: Leaving directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/modules/nand'
make: Entering directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/modules/nand'
[NAND] NOT buid as ko
make: Leaving directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/modules/nand'
[NAND]: Build done
[ GPU]: Build module driver
make: Entering directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/modules/gpu'
Nothing to do for unsupport configuration
make: Leaving directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/modules/gpu'
make: Entering directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/modules/gpu'
Nothing to do for unsupport configuration
make: Leaving directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/modules/gpu'
[ GPU]: Build done
---build dts for sun8iw20p1 ok113i-----
'/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/build/arch/arm/boot/dts//board.dtb' -> '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/staging/sunxi.dtb'
Copy modules to target ...
16149 blocks
25241 blocks
build_ramfs
Copy boot.img to output directory ...
sun8iw20p1 compile Kernel successful
INFO: Prepare toolchain ...
toolchain_archivedir=/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/build/toolchain/gcc-linaro-5.3.1-2016.05-x86_64_arm-linux-gnueabi.tar.xz
Using default config /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/arch/arm/configs/OK113I_linux_defconfig ...
make[1]: Entering directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/build'
GEN Makefile
*** Default configuration is based on 'OK113I_linux_defconfig'
#
# No change to .config
#
make[1]: Leaving directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/build'
---build dts for sun8iw20p1 ok113i-----
make[1]: Entering directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/build'
DTC arch/arm/boot/dts/board.dtb
make[1]: Leaving directory '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/build'
'/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/build/arch/arm/boot/dts//board.dtb' -> '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/staging/sunxi.dtb'
'/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/kernel/staging/sunxi.dtb' -> '/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/sunxi.dtb'
INFO: build kernel OK.内核编译完后OK113i-linux-sdk/out目录需要注意，这个是所有的编译输出目录，后面buildroot编译完也是在这个目录编译输出的。此目录中如下几个目录需要特别记住：
- 编译内核的交叉编译工具链
在
OK113i-linux-sdk/out/gcc-linaro-5.3.1-2016.05-x86_64_arm-linux-gnueabi目录下就是编译内核的交叉编译工具链。 - buildroot的交叉编译工具链
在
OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/bin/中arm-linux-gnueabi-g等，编译应用程序的时候使用这个编译工具。 - 内核编译输出目录
在
OK113i-linux-sdk/out/kernel目录下就是内核编译目录位置，具体结构如下所示：
├── build # 编译生成的临时文件
│ ├── arch
│ ├── block
│ ├── certs
│ ├── crypto
│ ├── drivers #编译生成的驱动模块在此目录中
│ ├── fs
│ ├── include
│ ├── init
│ ├── ipc
│ ├── kernel
│ ├── lib
│ ├── Makefile
│ ├── mm
│ ├── modules.builtin
│ ├── modules.builtin.modinfo
│ ├── modules.order
│ ├── Module.symvers
│ ├── net
│ ├── scripts
│ ├── security
│ ├── sound
│ ├── source -> /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4
│ ├── System.map
│ ├── usr
│ ├── virt
│ ├── vmlinux
│ └── vmlinux.o
└── staging
└── sunxi.dtb #猜测是设备树比如内核编译后wifi模块的驱动文件就存放在OK113i-linux-sdk/out/kernel/build/drivers/net/wireless/rtl8723du目录下的8723du.ko
kernel menuconfig 配置
代码语言：javascript复制build.sh menuconfig上面设置的config居然是out目录下的文件，重新编译会被覆盖。
编译阶段打印使用这个配置/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/kernel/linux-5.4/arch/arm/configs/OK113I_linux_defconfig，试着改这个试试。
buildroot 编译
代码语言：javascript复制./build.sh rootfs默认全部编译运行build.sh，会有如下打印有用信息，此处记录下：
编译Qt测试程序时候的打印
代码语言：javascript复制...
/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/bin/arm-linux-gnueabi-g -c -pipe -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os --sysroot=/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot -O2 -O3 -Wall -W -D_REENTRANT -fPIC -DQT_NO_UITOOLS -DQT_NO_DEBUG -DQT_WEBKITWIDGETS_LIB -DQT_PRINTSUPPORT_LIB -DQT_WIDGETS_LIB -DQT_WEBKIT_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -I. -I/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/qt5 -I/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/qt5/QtWebKitWidgets -I/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/qt5/QtPrintSupport -I/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/qt5/QtWidgets -I/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/qt5/QtWebKit -I/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/qt5/QtGui -I/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/qt5/QtNetwork -I/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/qt5/QtCore -I. -I. -I/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/mkspecs/devices/linux-buildroot-g -o settings.o settings.cpp
/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/bin/qmake -o Makefile /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/platform/framework/auto/qt_demo/terminal/terminal.pro ) && make -f Makefile
build emmc rootfs
PARTITION_FEX=/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/device/config/chips/t113_i/configs/ok113i/longan/sys_partition.fex
ROOTFS_FEX_LINE=64
ROOTFS_FEX_STR= size = 2097152
ROOTFS_FEX_SIZE= 2097152
EXT4_SIZE=1073741824(1073741824/1024/1024)
/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/device/config/chips/t113_i/configs/ok113i/longan/sys_partition.fex rootfs.fex size is 2097152
EXT4_SIZE= 2097152*512=1073741824
Creating filesystem with parameters:
Size: 1073741824
Block size: 4096
Blocks per group: 32768
Inodes per group: 8192
Inode size: 256
Journal blocks: 4096
Label:
Blocks: 262144
Block groups: 8
Reserved blocks: 0
Reserved block group size: 63
Created filesystem with 8976/65536 inodes and 94920/262144 blocks
/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/build/bin/make_ext4fs -s -l 1073741824 /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/rootfs.ext4 /home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/target可以知道：
sysroot=/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/arm-buildroot-linux-gnueabi/sysroot- 移植好的qmake所在路径：
OK113i-linux-sdk/out/t113_i/ok113i/longan/buildroot/host/bin/qmake - Qt示例工程源代码在
/home/luoyang/Dev/sdk/T113-i/OK113i-linux-sdk/platform/framework/auto/qt_demo目录 - 编译好的驱动模块都在
OK113i-linux-sdk/out/t113_i/ok113i/longan/dist目录下面：
OK113i-linux-sdk/out/t113_i/ok113i/longan/dist$ tree
.
├── 8723du.ko
├── c2590_mipi.ko
├── gc030a_mipi.ko
├── gc0310_mipi.ko
├── gc2385_mipi.ko
├── gc5025_mipi.ko
├── imx278_2lane_mipi.ko
├── imx278_mipi.ko
├── imx386_2lane_mipi.ko
├── imx386_mipi.ko
├── md5.ko
├── modules.alias
├── modules.alias.bin
├── modules.builtin
├── modules.builtin.alias.bin
├── modules.builtin.bin
├── modules.dep
├── modules.dep.bin
├── modules.devname
├── modules.order
├── modules.softdep
├── modules.symbols
├── modules.symbols.bin
├── Module.symvers
├── nvp6158.ko
├── ov2680_mipi.ko
├── ov5640.ko
├── ov8858_r2a_4lane.ko
├── sha1_generic.ko
├── sp5409_mipi.ko
├── sunxi-ce.ko
├── vf-test.ko
├── xr819s.ko
├── xr829.ko
├── xradio_btlpm.ko
└── xr_usb_serial_common.ko最后总结
板子出厂的rootfs中包含的基础软件是真的很全面，基本可以做到开箱即用了，wifi驱动也已经适配了，wpa_supplicant、bluealsa、bluez、alsa、tinyalsa等工具软件也已经包含。因为目前手头没有能直接可用的显示屏，所以HMI显示和视频解码等高级功能没法体验。不过对于喜欢折腾的先适配一块触摸显示屏还是很有必要的，这样可玩性更高。
