Ubuntu环境下Pixhawk原生固件PX4的编译

Ubuntu下Pixhawk原生固件PX4的编译这个问题困扰了两天时间，可能是博主脑力不够，主要是环境搭建不起来，主要原因应该是路径的原因，最后在大师傅的帮助下还好成功将路径搭建好，成功编译。

下面就跟大家分享一下环境搭建的过程。

1.操作环境

每次写文章，环境一定要介绍的，不同的环境总会出现不同的问题

我的环境是Windows下面安装虚拟机，虚拟机跑Ubuntu

Windows：win10 64位

虚拟机：VMware Workstation 12 Pro  12.1.0 build-3272444

Ubuntu：Ubuntu15.10

2.编译环境搭建

（1）权限设置

官方提示：

Warning Never ever fix permission problems by using 'sudo'. It will create more permission problems in the process and require a system reinstallation to fix them.
意思是你会遇到权限问题，不要用sudo解决，那样会带来更多问题，但是我没听他的，我没用，最后也是实现了

官方提供指令

sudo usermod -a -G dialout $USER

然后注销，重新登录生效

（2）安装

更新包列表，安装下面编译PX4的依赖包。PX4主要支持的系列：

    NuttX based hardware: Pixhawk, Pixfalcon
    Snapdragon Flight hardware: Snapdragon
    Raspberry Pi hardware: Raspberry Pi 2
    Host simulation: jMAVSim SITL and Gazebo SITL

注意：安装Ninja Build System可以比make更快进行编译。如果安装了它就会自动选择使用它进行编译。

sudo add-apt-repository ppa:george-edison55/cmake-3.x -ysudo apt-get updatesudo apt-get install python-argparse git-core wget zip \    python-empy qtcreator cmake build-essential genromfs -y# simulation toolssudo apt-get install ant protobuf-compiler libeigen3-dev libopencv-dev openjdk-7-jdk openjdk-7-jre clang-3.5 lldb-3.5 -y

卸载模式管理器

sudo apt-get remove modemmanager

更新包列表和安装下面的依赖包。务必安装指定的版本的包

sudo add-apt-repository ppa:terry.guo/gcc-arm-embedded -ysudo apt-get updatesudo apt-get install python-serial openocd \    flex bison libncurses5-dev autoconf texinfo build-essential \    libftdi-dev libtool zlib1g-dev \    python-empy <span style="color:#FF0000;">gcc-arm-none-eabi</span> -y

上面代码中红色部分大家需要一高警惕，gcc-arm-none-eabi版本导致PX4/Firmware编译错误，现在apt-get安装的gcc-arm-none-eabi基本上是4.9的版本，但是这个固件需要gcc-arm-none-eabi 4.8de 版本，所以最后安装好以后，查看你的gcc-arm-none-eabi版本，如果是4.9需要手动安装4.8的版本，安装gcc-arm-none-eabi 4.8的版本的方法如下：

sudo apt-get remove gcc-arm-none-eabi<span id="transmark"></span>wget https://launchpadlibrarian.net/186124160/gcc-arm-none-eabi-4_8-2014q3-20140805-linux.tar.bz2tar xjvf gcc-arm-none-eabi-4_8-2014q3-20140805-linux.tar.bz2sudo mv gcc-arm-none-eabi-4_8-2014q3 /opt#手动修改文件sudo vim /etc/profile#在最后添加路径export PATH=/opt/gcc-arm-none-eabi-4_8-2014q3/bin:$PATH#保存退出，为使添加的路径生效，执行指令source /etc/profile

【Warning】上面红色的路径一定要添加正确，不然问题很多，我第一次就输入错误，结果结果开不了机了，反复输入密码。博主装的是Ubuntu 64位系统，而上述arm-none-eabi是直接下载的编译好的32位，还需要安装一个东西

sudo apt-get install lsb-core

可以检查arm-none-eabi 4.8.4是否安装成功，输入以下指令：

~$ arm-none-eabi-g++ -vUsing built-in specs.COLLECT_GCC=arm-none-eabi-g++COLLECT_LTO_WRAPPER=/opt/gcc-arm-none-eabi-4_8-2014q3/bin/../lib/gcc/arm-none-eabi/4.8.4/lto-wrapperTarget: arm-none-eabiConfigured with: /home/build/work/GCC-4-8-build/src/gcc/configure --target=arm-none-eabi --prefix=/home/build/work/GCC-4-8-build/install-native --libexecdir=/home/build/work/GCC-4-8-build/install-native/lib --infodir=/home/build/work/GCC-4-8-build/install-native/share/doc/gcc-arm-none-eabi/info --mandir=/home/build/work/GCC-4-8-build/install-native/share/doc/gcc-arm-none-eabi/man --htmldir=/home/build/work/GCC-4-8-build/install-native/share/doc/gcc-arm-none-eabi/html --pdfdir=/home/build/work/GCC-4-8-build/install-native/share/doc/gcc-arm-none-eabi/pdf --enable-languages=c,c++ --enable-plugins --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared --disable-threads --disable-tls --with-gnu-as --with-gnu-ld --with-newlib --with-headers=yes --with-python-dir=share/gcc-arm-none-eabi --with-sysroot=/home/build/work/GCC-4-8-build/install-native/arm-none-eabi --build=i686-linux-gnu --host=i686-linux-gnu --with-gmp=/home/build/work/GCC-4-8-build/build-native/host-libs/usr --with-mpfr=/home/build/work/GCC-4-8-build/build-native/host-libs/usr --with-mpc=/home/build/work/GCC-4-8-build/build-native/host-libs/usr --with-isl=/home/build/work/GCC-4-8-build/build-native/host-libs/usr --with-cloog=/home/build/work/GCC-4-8-build/build-native/host-libs/usr --with-libelf=/home/build/work/GCC-4-8-build/build-native/host-libs/usr --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-pkgversion='GNU Tools for ARM Embedded Processors' --with-multilib-list=armv6-m,armv7-m,armv7e-m,armv7-rThread model: singlegcc version 4.8.4 20140725 (release) [ARM/embedded-4_8-branch revision 213147] (GNU Tools for ARM Embedded Processors) 

如果出现如上信息，交叉编译环境搭建就搭建成功了
（3）代码编译
根据PX4中文维基官网教程。
安装Git

sudo apt-get install git-all

下载代码

mkdir -p ~/srccd ~/srcgit clone https://github.com/PX4/Firmware.git

初始化 
先进入Firmware文件夹，进而进行初始化、更新子模块操作，耐心的等待……

cd Firmwaregit initgit submodule update --init --recursive

权限
编译时会遇到权限问题，执行指令

sudo chmod 777 -R *

-R 是对文件下面包含的子文件权限问题，* 是对所有文件的权限问题
编译

make px4fmu-v2_default

注意到“make”是一个字符命令编译工具，“px4fmu-v2”是硬件版本，“default”是默认配置，所有的PX4编译目标遵循这个规则。
最后附一张编译成功的代码，如果这样你还有问题，请给我留言。

-- nuttx-px4fmu-v2-default-- The ASM compiler identification is GNU-- Found assembler: /opt/gcc-arm-none-eabi-4_8-2014q3/bin/arm-none-eabi-gcc-- Found PythonInterp: /usr/bin/python (found version "2.7.10") -- Using C++03-- Release build type: RelWithDebInfo-- Adding UAVCAN STM32 platform driver-- Configuring done-- Generating done-- Build files have been written to: /home/lihongwei/Documents/Firmware/build_px4fmu-v2_default#+@Tools/check_submodules.shPX4 CONFIG: px4fmu-v2_defaultScanning dependencies of target git_mavlinkScanning dependencies of target git_uavcanScanning dependencies of target git_gencppScanning dependencies of target git_genmsg[  0%] Generating git_init_mavlink_include_mavlink_v1.0.stamp[  0%] Generating git_init_src_modules_uavcan_libuavcan.stamp[  0%] Generating git_init_Tools_genmsg.stamp[  0%] Generating git_init_Tools_gencpp.stamp[  0%] Built target git_uavcan[  0%] Built target git_mavlink[  0%] Built target git_genmsg[  0%] Built target git_gencppScanning dependencies of target git_nuttxScanning dependencies of target git_matrixScanning dependencies of target mixer_genScanning dependencies of target libuavcan_dsdlc[  0%] Generating git_init_NuttX.stamp[  1%] Generating git_init_src_lib_matrix.stamp[  1%] Generating mixer_multirotor.generated.h[  1%] Running dsdl compiler[  1%] Built target git_matrix[  1%] Built target git_nuttxScanning dependencies of target git_eclScanning dependencies of target xml_gen[  1%] Built target mixer_gen[  1%] Generating git_init_src_lib_ecl.stamp[  1%] Generating parameters.xml[  1%] Built target git_eclScanning dependencies of target msg_genScanning dependencies of target nuttx_export_px4fmu-v2[  2%] Generating uORB topic multi headers for nuttx[  2%] Building NuttX for px4fmu-v2[  2%] Generating uORB topic headers[  2%] Built target libuavcan_dsdlcScanning dependencies of target nuttx_export_px4io-v2[  2%] Building NuttX for px4io-v2make[4]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.make[4]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.make[4]: warning: -jN forced in submake: disabling jobserver mode.make[4]: warning: -jN forced in submake: disabling jobserver mode.[  3%] Generating airframes.xml[  3%] Built target xml_gen[  3%] Built target msg_gen[  4%] Generating nuttx_export_px4io-v2.stamp[  4%] Built target nuttx_export_px4io-v2Scanning dependencies of target io_prebuild_targets[  4%] Built target io_prebuild_targetsScanning dependencies of target px4io-v2[  4%] Building C object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/controls.c.obj[  5%] Building C object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/adc.c.obj[  5%] Building C object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/px4io.c.obj[  5%] Building C object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/registers.c.obj[  6%] Building C object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/safety.c.obj[  6%] Building C object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/__/systemlib/up_cxxinitialize.c.obj[  6%] Building C object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/__/systemlib/perf_counter.c.obj[  6%] Building CXX object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/mixer.cpp.obj[  6%] Building CXX object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/__/systemlib/mixer/mixer.cpp.obj[  7%] Building CXX object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/__/systemlib/mixer/mixer_group.cpp.obj[  7%] Building CXX object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/__/systemlib/mixer/mixer_multirotor.cpp.obj[  7%] Building CXX object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/__/systemlib/mixer/mixer_simple.cpp.obj[  7%] Building C object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/__/systemlib/pwm_limit/pwm_limit.c.obj[  8%] Building C object src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/__/__/lib/rc/st24.c.obj[  8%] Building C object 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src/modules/px4iofirmware/CMakeFiles/px4io-v2.dir/__/systemlib/hx_stream.c.obj[ 10%] Linking CXX executable px4io-v2[ 10%] Built target px4io-v2Scanning dependencies of target fw_io[ 11%] Generating px4io-v2.bin[ 11%] Built target fw_io[ 12%] Generating extras/px4io-v2.bin[ 12%] Generating romfs.oScanning dependencies of target romfs[ 12%] Linking C static library libromfs.a[ 12%] Built target romfs[ 12%] Generating nuttx_export_px4fmu-v2.stamp[ 12%] Built target nuttx_export_px4fmu-v2Scanning dependencies of target prebuild_targets[ 12%] Built target prebuild_targetsScanning dependencies of target platforms__common[ 12%] Building C object src/platforms/common/CMakeFiles/platforms__common.dir/px4_getopt.c.obj[ 12%] Linking C static library libplatforms__common.a[ 12%] Built target platforms__commonScanning dependencies of target drivers__stm32Scanning dependencies of target platforms__nuttxScanning dependencies of target drivers__stm32__adcScanning dependencies of target 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15%] Building C object src/drivers/stm32/CMakeFiles/drivers__stm32.dir/drv_input_capture.c.obj[ 15%] Built target platforms__nuttxScanning dependencies of target drivers__led[ 15%] Building CXX object src/drivers/led/CMakeFiles/drivers__led.dir/led.cpp.obj[ 16%] Building CXX object src/drivers/device/CMakeFiles/drivers__device.dir/device_nuttx.cpp.obj[ 16%] Linking C static library libdrivers__stm32.a[ 16%] Built target drivers__stm32[ 16%] Linking CXX static library libdrivers__led.a[ 16%] Linking CXX static library libdrivers__stm32__tone_alarm.a[ 16%] Built target drivers__led[ 16%] Building CXX object src/drivers/device/CMakeFiles/drivers__device.dir/cdev.cpp.obj[ 16%] Built target drivers__stm32__tone_alarmScanning dependencies of target drivers__px4fmuScanning dependencies of target drivers__boards__px4fmu-v2Scanning dependencies of target drivers__px4io[ 16%] Building CXX object src/drivers/px4fmu/CMakeFiles/drivers__px4fmu.dir/fmu.cpp.obj[ 16%] Building C object 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