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Qt在工业上的使用场景包括工业自动化、嵌入式系统、汽车行业、航空航天、医疗设备、制造业和物联网应用。Qt被用来开发工业设备的用户界面、控制系统、嵌入式应用和其他工业应用，因其跨平台性和丰富的功能而备受青睐。 Qt能够为工业领域带来什么好处：
- Qt提供了强大的图形引擎，使开发人员能够创建具有吸引力和高性能的用户界面
- Qt允许开发人员根据具体需求定制用户界面和功能。这对于满足不同行业和项目的独特需求至关重要，使工业应用能够实现个性化的解决方案
- Qt提供了丰富的库和工具，涵盖了各种应用程序开发需求，包括图形、网络通信、多媒体处理、数据存储等。这简化了工业应用程序的开发流程
- Qt可以轻松与各种硬件设备和通信协议集成，这对于工业自动化和控制系统来说非常重要，因为它们需要与各种传感器、执行器和其他工业设备进行通信 创龙科技基于全志双核Cortex-A7@1.2GHz处理器T113-i，精心设计的全国产工业开发板，它提供了Qt的运行环境，可以让我们快速的部署工业领域的用户交互界面，控制系统等。 接下来我们来聊聊如何在创龙科技T113-i工业开发板上部署Qt应用。 开发板Qt运行环境开发板SDK准备- 创龙科技的资料中提供了开发板的SDK-T113-i_v1.0.tar.gz，需要解压ubuntu中解压出来：
rice@rice:~$ mkdir t113 //创建t113工作目录，然后将压缩包拷贝到此目录rice@rice:~$ cd t113....rice@rice:~/t113$ tar -zxvf SDK-T113-i_v1.0.tar.gzrice@rice:~/t113$ cd T113-i_v1.0/rice@rice:~/t113/T113-i_v1.0$ lsbrandy buildroot device install_tools.sh out rtos-dsp toolsbuild build.sh kernel platform test- 安装依赖软件，创龙科技提供了安装脚本：install_tools.sh，我们执行该脚本即可完成依赖工具的安装：
rice@rice:~/t113/T113-i_v1.0$ ./install_tools.sh[sudo] password for rice: Reading package lists... DoneBuilding dependency tree Reading state information... Donetexinfo is already the newest version (6.5.0.dfsg.1-2).0 upgraded, 0 newly installed, 0 to remove and 121 not upgraded.Reading package lists... DoneBuilding dependency tree Reading state information... Donepkg-config is already the newest version (0.29.1-0ubuntu2).0 upgraded, 0 newly installed, 0 to remove and 121 not upgraded.Reading package lists... Done......- 解压Buildroot dl--dl.tar.gz，其为 Buildroot dl 目录压缩包，用于存放从官网下载的开源软件包：
rice@rice:~/t113$ tar -xvf dl.tar.gz -C ~/t113/buildroot/buildroot-201902/构建Qt固件- 在编译固件前，先清理一下SDK的编译和配置生成文件：
rice@rice:~/t113/T113-i_v1.0$ ./build.sh distclean- 配置linux内核，处理器型号，显示方式，编译器等信息
rice@rice:~/t113/T113-i_v1.0$ ./build.sh configWelcome to mkscript setup progressAll available platform: 0. linuxChoice [linux]: 0All available linux_dev: 0. bsp 1. dragonboard 2. longan 3. tinyosChoice [longan]: 2All available kern_ver: 0. linux-5.4Choice [linux-5.4]: 0All available ic: 0. t113 1. t113_iChoice [t113_i]: 1All available board: 0. evb1 1. evb1_auto 2. evb1_auto_nand 3. evb1_auto_nor 4. tlt113-evm-emmc 5. tlt113-evm-nand 6. tlt113-minievm-emmc 7. tlt113-minievm-nandChoice [tlt113-evm-nand]: 5All available output_configs: 0. hdmi 1. lvds-lcd 2. mipi-lcd 3. tft-lcd 4. cvbsChoice [hdmi]: 0All available flash: 0. default 1. norChoice [default]: 0All available build_root: 0. buildroot-201902 1. ubuntuChoice [buildroot-201902]: 0All available gnueabi: 0. gnueabi 1. gnueabihfChoice [gnueabi]: 0rice@rice:~/t113/T113-i_v1.0$ source ./build/envsetup.sh- 我们采用一键编译 SPL、U-Boot、Linux 内核和 buildroot文件系统。
rice@rice:~/t113/T113-i_v1.0$ ./build.shACTION List: mklichee;========Execute command: mklichee INFO: ----------------------------------------INFO: build lichee ...INFO: chip: sun8iw20p1INFO: platform: linuxINFO: kernel: linux-5.4INFO: board: tlt113-evm-nandINFO: output: /home/rice/t113/T113-i_v1.0/out/t113_i/tlt113-evm-nand/longanINFO: ----------------------------------------INFO: build buildroot ...Prepare br toolchain gcc-linaro-5.3.1-2016.05-x86_64_arm-linux-gnueabi.tar.xz...make: Entering directory '/home/rice/t113/T113-i_v1.0/buildroot/buildroot-201902'...rice@rice:~/t113/T113-i_v1.0$ ./build.sh qtACTION List: mkqt;========Execute command: mkqt INFO: build Qt ...INFO: build arm-linux-gnueabi version's Qt/home/rice/t113/T113-i_v1.0/platform/framework/qt/qt-everywhere-src-5.12.5Using built-in specs.COLLECT_GCC=gccCOLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapperOFFLOAD_TARGET_NAMES=nvptx-noneOFFLOAD_TARGET_DEFAULT=1Target: x86_64-linux-gnuConfigured with: ../src/configure -v --with-pkgversion='Ubuntu 7.5.0-3ubuntu1~18.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnuThread model: posix.....- 打包系统镜像文件，执行之后，可以看到生成的固件文件，它默认生成两个版本的固件，分别是：nand固件和SD卡固件，我们是采用SD卡启动，所以使用SD卡固件。
rice@rice:~/t113/T113-i_v1.0$ ./build.sh packACTION List: mkpack ;========Execute command: mkpack INFO: packing firmware ...INFO: Use BIN_PATH: /home/rice/t113/T113-i_v1.0/device/config/chips/t113_i/bincopying tools filecopying configs filecopying product configs file/home/rice/t113/T113-i_v1.0/out/pack_out/aultls32.fex/home/rice/t113/T113-i_v1.0/out/pack_out/aultools.fex/home/rice/t113/T113-i_v1.0/out/pack_out/boot_package.cfg/home/rice/t113/T113-i_v1.0/out/pack_out/boot_package.fex...... dsp0.fex Len: 0x3fc78Vdsp0.fex Len: 0x4BuildImg 0Dragon execute image.cfg SUCCESS !----------image is at----------size:613M /home/rice/t113/T113-i_v1.0/out/t113_i_linux_tlt113-evm-nand-sdboot_uart0.imgpack finish运行环境验证下载运行实例- 将编译打包后的固件(t113_i_linux_tlt113-evm-nand-sdboot_uart0.img)放到windows上，通过工具PhoenixCard.exe烧录到SD卡上。将SD卡插到读卡器上，然后插进电脑：
- 创龙科技提供了qt的demo，我们将led_control的实例拷贝到板子上：
rice@rice:~/t113/qt-demos/led_control/bin$ scp led_control root@ip:~/创龙T113-i上运行实例root@T113-Tronlong:~# killall Launcherroot@T113-Tronlong:~# source /etc/qtenv.sh add /dev/input/event1 to Qt Application.find qt5 installed doneroot@T113-Tronlong:~# ./led_controlQt开发环境开发环境下载- Qt开发环境下载，作者是使用Qt 5.12.0，下载链接：https://download.qt.io/archive/qt/5.12/5.12.0/，Ubuntu需要下载：qt-opensource-linux-x64-5.12.0.run
开发环境交叉编译环境配置- 配置Debuggers
- 点击菜单栏"Tools -> Options"
- 击"Kits -> Debuggers -> Add -> Browse…"
- 选择目标平台的GDB，路径：/home/rice/t113/T113-i_v1.0/out/t113_i/tlt113-evm-nand/longan/buildroot/host/usr/bin/arm-linux-gnueabi-gdb
- 配置交叉工具链
- 点击菜单栏"Tools -> Options"
- 击"Kits -> Compilers -> Add -> GCC -> C++ -> Browse…"
- 选择目标平台的交叉工具链，路径：/home/rice/t113/T113-i_v1.0/out/t113_i/tlt113-evm-nand/longan/buildroot/host/usr/bin/arm-linux-gnueabi-g++
- 配置Qt Versions
- 点击菜单栏"Tools -> Options"
- 击"Kits -> Qt Versions -> Add -> GCC -> C++ -> Browse…"
- 选择目标平台的Qt Versions，路径：/home/rice/t113/T113-i_v1.0/platform/framework/qt/qt-everywhere-src-5.12.5/Qt_5.12.5/bin/qmake
- 配置Kits
- 点击菜单栏"Tools -> Options"
- 击"Kits -> Kits"
- 将 Name 修改为"T113"，Device type 选择"Generic Linux Device"，Compiler 的 C++选择"T113-GCC"，Debugger 选择"T113-Debugger"，Qt version 选择"T113-qt5"，点击 Apply，然后点击 OK 完成配置
开发Qt应用static QString ledPath = "/sys/class/leds/user-led0";void rice::ledInit(){ setLedStatus(0); ui->ledPushButton->setText("LED OFF"); ui->ledPushButton->setStyleSheet("border-width:1px;" "border-style:solid; " "border-color:white;" "background-color:rgba(88, 88, 88, 200)");}void rice::ledDeinit(){}bool rice::setLedStatus(int status){ QString cmd = "echo " + QString::number(status) + " > " + ledPath + "/brightness"; if (system(cmd.toStdString().c_str()) == -1) { printf("set led status failed!\n"); return false; } return true;}int rice::getLedStatus(void){ QString cmd = "cat " + ledPath + "/brightness"; FILE *fp = popen(cmd.toStdString().c_str(), "r"); if (fp == nullptr) { return -1; } char led_status[32]; if (fgets(led_status, sizeof(led_status), fp) == nullptr) { printf("fgets error: %s\n", cmd.toStdString().c_str()); pclose(fp); return -1; } pclose(fp); return atoi(led_status);}void rice::on_ledPushButton_clicked(){ int ledStatus = getLedStatus(); if (ledStatus == 0) { setLedStatus(1); ui->ledPushButton->setText("LED ON"); ui->ledPushButton->setStyleSheet("border-width:1px;" "border-style:solid; " "border-color:white;" "background-color:rgba(00, 205, 00, 255)"); } else { setLedStatus(0); ui->ledPushButton->setText("LED OFF"); ui->ledPushButton->setStyleSheet("border-width:1px;" "border-style:solid; " "border-color:white;" "background-color:rgba(88, 88, 88, 200)"); }}void rice::keyInit(){ keyFd = open(keyPath.toUtf8().data(), O_RDONLY); if(keyFd == -1) { printf("Can not open file(%s)", keyPath.toUtf8().data()); return; } ui->keyTextEdit->append("Key Monitor!\n"); ui->keyTextEdit->append("Key user0 pressed!"); keyNotify = new QSocketNotifier(this->keyFd, QSocketNotifier::Read, this); connect(this->keyNotify, SIGNAL(activated(int)), this, SLOT(keyHandler()));}void rice::keyDeinit(){}void rice::keyHandler(){ struct input_event buf; if(read(keyFd, &buf, sizeof(struct input_event)) > 0) { if(buf.code == KEY_PROG1 && buf.value == 1) { ui->keyTextEdit->append("Key user0 pressed!"); } }}void rice::dateInit(){ struct rtc_time rtc_tm_temp; dateFd = open(datePath.toUtf8().data(), O_RDONLY); if(dateFd == -1) { printf("Can not open file(%s)", keyPath.toUtf8().data()); return; } if(ioctl(dateFd, RTC_RD_TIME, &rtc_tm_temp) < 0) { printf("Get date failed"); return; } ui->yearLineEdit->setText(QString::number(rtc_tm_temp.tm_year + 1900)); ui->monthLineEdit->setText(QString::number(rtc_tm_temp.tm_mon + 1)); ui->dayLineEdit->setText(QString::number(rtc_tm_temp.tm_mday));}void rice::dateDeint(){}void rice::netInit(){ server = new QTcpServer(); socket = new QTcpSocket();}void rice::netDeint(){}void rice::netNewClientConnect(){ socket = server->nextPendingConnection(); connect(socket, &QTcpSocket::readyRead, this, &rice::netNewRcve);}void rice::on_netPushButton_clicked(){ int port = ui->portLineEdit->text().toInt(); if(ui->netPushButton->text() == tr("Open")) { if(ui->typeComboBox->currentText() == tr("Server")) { connect(server, &QTcpServer::newConnection, this, &rice::netNewClientConnect); if(!server->listen(QHostAddress::Any, port)) { printf("Listen failed\n"); return; } } else if(ui->typeComboBox->currentText() == tr("Client")) { QString ip = ui->ipComboBox->currentText(); socket->abort(); socket->connectToHost(ip, port); if(!socket->waitForConnected(3000)) { printf("Connect server failed"); return; } connect(socket, &QTcpSocket::readyRead, this, &rice::netNewRcve); } ui->netPushButton->setText("Close"); } else if(ui->netPushButton->text() == tr("Close")) { if(ui->typeComboBox->currentText() == tr("Server")) { socket->abort(); server->close(); } else if(ui->typeComboBox->currentText() == tr("Client")) { socket->disconnectFromHost(); } ui->netPushButton->setText("Open"); }}void rice::on_sendPushButton_clicked(){ if(socket->isOpen()) { socket->write(ui->sendLineEdit->text().toUtf8().data()); }}void rice::netNewRcve(){ ui->recvTextEdit->append(socket->readAll());}void rice::on_typeComboBox_currentIndexChanged(const QString &arg1){ if(arg1 == tr("Server")) { ui->ipComboBox->setEditable(false); } else { ui->ipComboBox->setEditable(true); }}Qt应用验证- 板载LED灯控制验证，当点击开关LED按钮时，LED灯会根据状态亮灭：
- 网络调试助手支持TCP客户端和TCP服务器两种类型，下面演示服务器验证。开发板上设置板子的IP，和端口号，然后通过PC上网络调试助手连接上板子，并克实现数据的收发：
- 服务器往客户端发送数据
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