2 部署开发环境

开发前需要安装好Linux操作系统，推荐使用Ubuntu 16.04 64bit发行版，连接网线并配置好网络，后续操作需要连接互联网安装或下载相关软件包。

开发板与计算机连接

1. 计算机使用USB转TTL串口转接线与开发板的DEBUG串口(JP1)连接
2. 运行串口调试应用程序，并选择对应的串口设备

计算机端的串口配置参数如下：

• 波特率：115200
• 数据位: 8bit
• 校验方式：None
• 停止位：1bit
• 流控：Disable

图2-1 MYS-6ULX-IND接口定义 图2-2 MYS-6ULX-IoT接口定义 图2-3 MYB-6ULX接口定义 图2-4 MYS-6ULX安装MYB-6ULX侧面图

安装必备软件包

sudo apt-get install build-essential git-core libncurses5-dev \
flex bison texinfo zip unzip zlib1g-dev gettext u-boot-tools \
g++ xz-utils mtd-utils gawk diffstat gcc-multilib python git \
make gcc g++ diffstat bzip2 gawk chrpath wget cpio texinfo

建立工作目录

建立工作目录，方便设置统一的环境变量路径。拷贝产品光盘中的源码到工作目录下，同时设置DEV_ROOT变量，方便后续步骤的路径访问。

mkdir -p ~/MYS6ULx-devel
export DEV_ROOT=~/MYS6ULx-devel
cp -r <DVDROM>/02-Images $DEV_ROOT
cp -r <DVDROM>/03-Tools $DEV_ROOT
cp -r <DVDROM>/04-Source $DEV_ROOT

配置编译工具

• Linaro交叉编译器: gcc version 4.9.3 20141031 (prerelease) (Linaro GCC 2014.11)
• Yocto交叉编译器: gcc version 5.3.0 (GCC)

这里有两个编译器，一个是Linaro提供，另一个是由Yocto构建的，建议使用Yocto提供的，以便和文件系统统一。

Linaro编译器

cd $DEV_ROOT
tar -xvjf 03-Tools/Toolchain/\
gcc-linaro-4.9-2014.11-x86_64_arm-linux-gnueabihf.tar.xz
export PATH=$PATH:$DEV_ROOT/\
gcc-linaro-4.9-2014.11-x86_64_arm-linux-gnueabihf/bin
export CROSS_COMPILE=arm-linux-gnueabihf-
export ARCH=arm

执行完上述命令后输入"arm-linux-gnueabihf-gcc -v"，若有输出版本信息，说明设置成功，以上设置只对当前终端有效。如需永久修改，请修改用户配置文件。

$ arm-linux-gnueabihf-gcc -v
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabihf-gcc
COLLECT_LTO_WRAPPER=/home/kevinchen/MYS6ULx/\
gcc-linaro-4.9-2014.11-x86_64_arm-linux-gnueabihf/bin/../
libexec/gcc/arm-linux-gnueabihf/4.9.3/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: /home/buildslave/workspace/BinaryRelease/label/
x86_64/target/arm-linux-gnueabihf/snapshots/
gcc-linaro-4.9-2014.11/configure SHELL=/bin/bash --with-bugurl=
https://bugs.linaro.org 
--with-mpc=/home/buildslave/workspace/BinaryRelease/label/x86_64
/target/arm-linux-gnueabihf/_build/builds/destdir/x86_64-unknown
-linux-gnu --with-mpfr=/home/buildslave/workspace/
BinaryRelease/label/x86_64/target/arm-linux-gnueabihf/_build/bui
lds/destdir/x86_64-unknown-linux-gnu
--with-gmp=/home/buildslave/workspace/BinaryRelease/label/x86_64
/target/arm-linux-gnueabihf/_build/builds/destdir/x86_64-unknown
-linux-gnu --with-gnu-as --with-gnu-ld --disable-libstdcxx-pch -
-disable-libmudflap --with-cloog=no --with-ppl=no --with-isl=no 
--disable-nls --enable-multiarch --disable-multilib --enable-c99
--with-tune=cortex-a9 --with-arch=armv7-a --with-fpu=vfpv3-d16 
--with-float=hard --with-mode=thumb --disable-shared --enable-
static --with-build-sysroot=/home/buildslave/workspace/BinaryRel
ease/label/x86_64/target/arm-linux-gnueabihf/_build/sysroots/arm
-linux-gnueabihf --enable-lto --enable-linker-build-id --enable-
long-long --enable-shared --with-sysroot=/home/buildslave/worksp
ace/BinaryRelease/label/x86_64arm-linux-gnueabihf/_build/builds/
destdir/x86_64-unknown-linux-gnu/libc --enable-languages=c,c++,
fortran,lto -enable-fix-cortex-a53-835769 --enable-checking=rele
ase --with-bugurl=https://bugs.linaro.org
--with-pkgversion='Linaro GCC 2014.11' --build=x86_64-unknown-li
nux-gnu --host=x86_64-unknown-linux-gnu --target=arm-linux-gnuea
bihf
--prefix=/home/buildslave/workspace/BinaryRelease/label/x86_64/t
arget/arm-linux-gnueabihf/_build/builds/destdir/x86_64-unknown-l
inux-gnu
Thread model: posix
gcc version 4.9.3 20141031 (prerelease) (Linaro GCC 2014.11)

Yocto编译工具链

Yocto提供的工具链有两种，一种是底层开发的meta-toolchain，另一种是用于应用开发的工具链。前者和Linaro类似，后者包含应用开发中的相关库，可以直接使用pkg-config工具来解决头文件或库文件的依赖关系。MYS-6ULX的资源包中有提供两种工具链。

Yocto编译器是以SDK工具包方式来提供，需要先安装SDK包后，才可以使用。安装方法如下：

以普通用户权限执行shell脚本，运行中会提示安装路径，默认在/opt目录下，同时会提示输入用户密码以便有写入目录的权限。安装完成后，可以使用"source"或"."命令加载工链接环境到当前终端。

例子把应用开发工具链安装在了/opt/myir-imx6ulx-fb/4.1.15-2.0.1目录下。

./myir-imx-fb-glibc-x86_64-fsl-image-qt5-cortexa7hf-\
neon-toolchain-4.1.15-2.0.1.sh 
Freescale i.MX Release Distro SDK installer version 4.1.15-2.0.1
================================================================
Enter target directory for SDK (default: /opt/myir-imx-fb/4.1.15
-2.0.1): 
/opt/myir-imx6ulx-fb/4.1.15-2.0.1                                        
Do You are about to install the SDK to "/opt/myir-imx6ulx-fb/4.1
.15-2.0.1". Proceed[Y/n]? Y
[sudo] password for kevinchen: 
Extracting SDK..................................................
................................................................
...............done
Setting it up...done
SDK has been successfully set up and is ready to be used.
Each time you wish to use the SDK in a new shell session, you ne
ed to source the environment setup script e.g.
. /opt/myir-imx6ulx-fb/4.1.15-2.0.1/environment-setup-cortexa7hf\
-neon-poky-linux-gnueabi

验证SDK工具链是否安装正确，先使用"source"命令加载Yocto的环境配置文件，然后查看编译器版本。

source /opt/myir-imx6ulx-fb/4.1.15-2.0.1/environment-setup-corte
xa7hf-neon-poky-linux-gnueabi
arm-poky-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-poky-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/opt/myir-imx6ulx-fb/4.1.15-2.0.1/sysroots/x
86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-p
oky-linux-gnueabi/5.3.0/lto-wrapper
Target: arm-poky-linux-gnueabi
Configured with: ../../../../../../work-shared/gcc-5.3.0-r0/gcc-
5.3.0/configure --build=x86_64-linux --host=x86_64-pokysdk-linux
--target=arm-poky-linux-gnueabi --prefix=/opt/myir-imx6ulx-fb/4.
1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr --exec_prefix=/opt/
myir-imx6ulx-fb/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr 
--bindir=/opt/myir-imx6ulx-fb/4.1.15-2.0.1/sysroots/x86_64-pokys
dk-linux/usr/bin/arm-poky-linux-gnueabi
--sbindir=/opt/myir-imx6ulx-fb/4.1.15-2.0.1/sysroots/x86_64-poky
sdk-linux/usr/bin/arm-poky-linux-gnueabi --libexecdir=/opt/myir-
imx6ulx-fb/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/usr/libexe
c/arm-poky-linux-gnueabi --datadir=/opt/myir-imx6ulx-fb/4.1.15-2
.0.1/sysroots/x86_64-pokysdk-linux/usr/share --sysconfdir=/opt/m
yir-imx6ulx-fb/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/etc 
--sharedstatedir=/opt/myir-imx6ulx-fb/4.1.15-2.0.1/sysroots/x86_
64-pokysdk-linux/com
--localstatedir=/opt/myir-imx6ulx-fb/4.1.15-2.0.1/sysroots/x86_6
4-pokysdk-linux/var --libdir=/opt/myir-imx6ulx-fb/4.1.15-2.0.1/s
ysroots/x86_64-pokysdk-linux/usr/lib/
arm-poky-linux-gnueabi --includedir=/opt/myir-imx6ulx-fb/4.1.15-
2.0.1/sysroots/x86_64-pokysdk-linux/usr/include --oldincludedir=
/opt/myir-imx6ulx-fb/4.1.15-2.0.1/sysroots/x86_64-pokysdk-linux/
usr/include --infodir=/opt/myir-imx6ulx-fb/4.1.15-2.0.1/
sysroots/x86_64-pokysdk-linux/usr/share/info
--mandir=/opt/myir-imx6ulx-fb/4.1.15-2.0.1/sysroots/x86_64-pokys
dk-linux/usr/share/man 
--disable-silent-rules --disable-dependency-tracking 
--with-libtool-sysroot=/home/kevinchen/mys-imx6ul/fsl-release-yo
cto/build/tmp/sysroots/x86_64-nativesdk-pokysdk-linux --with-gnu
-ld --enable-shared 
--enable-languages=c,c++ --enable-threads=posix --enable-multili
b --enable-c99 
--enable-long-long --enable-symvers=gnu --enable-libstdcxx-pch \
--program-prefix=arm-poky-linux-gnueabi- --without-local-prefix 
--enable-lto --enable-libssp 
--enable-libitm --disable-bootstrap --disable-libmudflap --with-
system-zlib 
--with-linker-hash-style=gnu --enable-linker-build-id --with-ppl
=no --with-cloog=no 
--enable-checking=release --enable-cheaders=c_global --without-i
sl 
--with-gxx-include-dir=/not/exist/usr/include/c++/5.3.0 
--with-build-time-tools=/home/kevinchen/mys-imx6ul/fsl-release-y
octo/build/tmp/sysroots/x86_64-linux/usr/arm-poky-linux-gnueabi/
bin --with-sysroot=/not/exist 
--with-build-sysroot=/home/kevinchen/mys-imx6ul/fsl-release-yoct
o/build/tmp/sysroots/mys6ul14x14 
--enable-poison-system-directories --with-mpfr=/home/kevinchen/m
ys-imx6ul/fsl-release-yocto/build/tmp/sysroots/x86_64-nativesdk-
pokysdk-linux --with-mpc=/home/kevinchen/mys-imx6ul/fsl-release-
yocto/build/tmp/sysroots/
x86_64-nativesdk-pokysdk-linux --enable-nls --with-arch=armv7-a
Thread model: posix
gcc version 5.3.0 (GCC)

同样方法请自行安装底层开发的工具链meta-toolchain。安装两个工具链，请指定不同目录，请勿使用相同目录，出现文件相互覆盖情形。