前言

• 最近需要使用 RT-Thread smart 开发调试一些软件功能，由于软件功能平台无关，使用实际硬件操作，会耗费较多的时间在程序烧写环节。

• 打算使用 BSP qemu-virt64-aarch64 搭建一个 RT-Thread smart 的开发调试环境，可以开发验证一些平台无关的软件功能

环境搭建

• Win10 64位

• VMware Workstation Pro

• VS Code （ssh 远程）

• ubuntu 20.04

• RT-Thread master 最新分支： BSP qemu-virt64-aarch64

下载 RT-Thread

• 这里使用 gitee 的 RT-Thread 仓库，先通过 fork 的方式，把 RT-Thread fork 到自己的账号下

• ubuntu 中安装好 git qemu，通过 git 克隆一份 RT-Thread 最新代码

• 可以直接克隆 RT-Thread 官方的 git clone https://gitee.com/rtthread/rt-thread.git

scons 构建

• 进入 rt-thread/bsp/qemu-virt64-aarch64，直接 scons 可能会提示 scons 找不到，如果找不到，就安装一下 scons

zhangsz@zhangsz:~/rtt/smart/rt-thread/bsp/qemu-virt64-aarch64$ sconsCommand 'scons' not found, but can be installed with:sudo apt install scons

• 安装 scons 的方法： $ sudo apt install scons

• 运行 $ scons --menuconfig，进入Kconfig 图形配置界面，初步运行，会克隆 Linux 下的 RT-Thread env 工具 与 packages 软件包

交叉编译工具链

• 再次运行 scons 后，发现提示找不到 gcc 交叉编译工具链， aarch64-none-elf-gcc: not found

zhangsz@zhangsz:~/rtt/smart/rt-thread/bsp/qemu-virt64-aarch64$ scons
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
scons: building associated VariantDir targets: build
CC build/applications/console.o
sh: 1: aarch64-none-elf-gcc: not found
scons: *** [build/applications/console.o] Error 127
scons: building terminated because of errors.

• 下载工具链：可以使用 get_toolchain.py 下载，不过这个脚本默认没有在 RT-Thread 工程里面，需要手动创建一个

• 在 rt-thread/bsp/qemu-virt64-aarch64 目录下，新建一个 tools 目录，然后进入这个 rt-thread/bsp/qemu-virt64-aarch64/tools 目录，创建 get_toolchain.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-#
# Copyright (c) 2022, RT-Thread Development Team
#
# SPDX-License-Identifier: GPL-2.0
#
# Change Logs:
# Date           Author       Notes
# 2022-02-1      Bernard      The first version
#import os
import sys
import platformfrom ci import CItoolchains_config = {'arm':{'Linux': 'arm-linux-musleabi_for_x86_64-pc-linux-gnu_latest.tar.bz2','Windows': 'arm-linux-musleabi_for_i686-w64-mingw32_latest.zip'},'aarch64':{'Linux' : 'aarch64-linux-musleabi_for_x86_64-pc-linux-gnu_latest.tar.bz2','Windows' : 'aarch64-linux-musleabi_for_i686-w64-mingw32_latest.zip'},'riscv64':{'Linux': 'riscv64-linux-musleabi_for_x86_64-pc-linux-gnu_latest.tar.bz2','Windows': 'riscv64-linux-musleabi_for_i686-w64-mingw32_latest.zip'}
}if __name__ == '__main__':# download toolchainif len(sys.argv) > 1:target = sys.argv[1]else:target = 'arm'ci = CI()toolchain_path = os.path.join(os.path.abspath('.'), 'gnu_gcc')platform = platform.system()try:zfile = toolchains_config[target][platform]URL = 'http://117.143.63.254:9012/www/rt-smart/' + zfileexcept:print('not found target')exit(0)ci.downloadFile(zfile, URL)ci.extractZipFile(zfile, toolchain_path)ci.delFile(zfile)

• 在 rt-thread/bsp/qemu-virt64-aarch64/tools目录下，创建一个 ci.py 脚本

#!/usr/bin/env python
# -*- coding: utf-8 -*-#
# Copyright (c) 2022, RT-Thread Development Team
#
# SPDX-License-Identifier: GPL-2.0
#
# Change Logs:
# Date           Author       Notes
# 2022-02-1      Bernard      The first version
#import os
import sys
import shutil
import platform
import requests
import time
import zipfileclass CI:def downloadFile(self, name, url):headers = {'Proxy-Connection':'keep-alive'}r = requests.get(url, stream=True, headers=headers)length = float(r.headers['content-length'])f = open(name, 'wb')count = 0count_tmp = 0time1 = time.time()for chunk in r.iter_content(chunk_size = 512):if chunk:f.write(chunk)count += len(chunk)if time.time() - time1 > 2:p = count / length * 100speed = (count - count_tmp) / 1024 / 1024 / 2count_tmp = countprint(name + ': ' + '{:.2f}'.format(p) + '%')time1 = time.time()print(name + ': 100%')f.close()def extractZipFile(self, zfile, folder):# self.delTree(folder)if not os.path.exists(folder):os.makedirs(folder)if platform.system() == 'Windows':zip_file = zipfile.ZipFile(zfile)zip_list = zip_file.namelist()for item in zip_list:print(item)zip_file.extract(item, folder)zip_file.close()elif platform.system() == 'Linux':if zfile.endswith('tar.gz'):os.system('tar zxvf %s -C %s' % (zfile, folder))elif zfile.endswith('tar.bz2'):os.system('tar jxvf %s -C %s' % (zfile, folder))elif zfile.endswith('.zip'):os.system('unzip %s -d %s' % (zfile, folder))returndef zipFolder(self, folder, zfile):zip_filename = os.path.join(folder)zip = zipfile.ZipFile(zfile, 'w', compression=zipfile.ZIP_BZIP2)pre_len = len(os.path.dirname(folder))for parent, dirnames, filenames in os.walk(folder):for filename in filenames:pathfile = os.path.join(parent, filename)arcname = pathfile[pre_len:].strip(os.path.sep)zip.write(pathfile, arcname)zip.close()returndef touchDir(self, d):if not os.path.exists(d):os.makedirs(d)def gitUpdate(self, url, folder, branch = 'master'):cwd = os.getcwd()if os.path.exists(folder):os.chdir(folder)os.system('git pull origin')if branch != 'master':os.system('git checkout -b %s origin/%s' % (branch, branch))os.system('git submodule init')os.system('git submodule update')else:os.system('git clone %s %s' % (url, folder))os.chdir(folder)os.system('git submodule init')os.system('git submodule update')os.chdir(cwd)def installEnv(self, folder):env_path = foldercwd = os.getcwd()os.chdir(env_path)self.touchDir(os.path.join(env_path, 'local_pkgs'))self.touchDir(os.path.join(env_path, 'packages'))self.touchDir(os.path.join(env_path, 'tools'))self.gitUpdate('https://gitee.com/RT-Thread-Mirror/env.git', 'tools/script')self.gitUpdate('https://gitee.com/RT-Thread-Mirror/packages.git', 'packages/packages')kconfig = open(os.path.join(env_path, 'packages', 'Kconfig'), 'w')kconfig.write('source "$PKGS_DIR/packages/Kconfig"')kconfig.close()os.chdir(cwd)returndef pkgsUpdate(self, env_folder):self.touchDir(env_folder)self.installEnv(env_folder)os.environ['PKGS_DIR'] = env_folderos.system('python %s package --update' % (os.path.join(env_folder, 'tools', 'script', 'env.py')))returndef delTree(self, folder):if os.path.exists(folder):shutil.rmtree(folder)def delFile(self, file):if os.path.exists(file):os.remove(file)def appendFile(self, srcFile, otherFile):f = open(otherFile, 'r')s = f.read()f.close()f = open(srcFile, 'a')f.write(s)f.close()def copyTree(self, srcTree, dstTree):if os.path.exists(dstTree):shutil.rmtree(dstTree)shutil.copytree(srcTree, dstTree)def run(self, cmds):cwd = os.getcwd()cmds = cmds.split('\n')for item in cmds:item = item.lstrip()if item == '':continueif item[0] == '-':os.system(item[1:].lstrip())# keep current directoryos.chdir(cwd)returnif __name__ == '__main__':ci = CI()env_folder = os.path.abspath(os.path.join('.', 'env_test'))# ci.pkgsUpdate(env_folder)cmds = '''# test- dir- dir tools'''ci.run(cmds)

• 下载gcc 交叉编译工具链： qemu-virt64-aarch64 是 aarch64 平台

$ python3 get_toolchain.py aarch64 就可以下载 aarch64 的 gcc 交叉编译工具链了

• 在 rt-thread/bsp/qemu-virt64-aarch64 目录下创建 一个设置环境变量的 shell 脚本，如 smart_env.sh

#!/bin/bash# usage:
# source smart-env.sh [arch]
# example: source smart-env.sh          # arm
# example: source smart-env.sh aarch64  # aarch64# supported arch list
supported_arch="arm aarch64 riscv64 i386"def_arch="unknown"# find arch in arch list
if [ -z $1 ]
thendef_arch="arm" # default arch is arm
elsefor arch in $supported_archdoif [ $arch = $1 ]thendef_arch=$archbreakfidone
fi# set env
case $def_arch in "arm")export RTT_CC=gccexport RTT_EXEC_PATH=$(pwd)/tools/gnu_gcc/arm-linux-musleabi_for_x86_64-pc-linux-gnu/binexport RTT_CC_PREFIX=arm-linux-musleabi-;;"aarch64")export RTT_CC=gccexport RTT_EXEC_PATH=$(pwd)/tools/gnu_gcc/aarch64-linux-musleabi_for_x86_64-pc-linux-gnu/binexport RTT_CC_PREFIX=aarch64-linux-musleabi-;;"riscv64")export RTT_CC=gccexport RTT_EXEC_PATH=$(pwd)/tools/gnu_gcc/riscv64-linux-musleabi_for_x86_64-pc-linux-gnu/binexport RTT_CC_PREFIX=riscv64-unknown-linux-musl-;;"i386")export RTT_CC=gccexport RTT_EXEC_PATH=$(pwd)/tools/gnu_gcc/i386-linux-musleabi_for_x86_64-pc-linux-gnu/binexport RTT_CC_PREFIX=i386-unknown-linux-musl-;;*)  echo "unknown arch!"return 1
esac# export RTT_EXEC_PATH
export PATH=$PATH:$RTT_EXEC_PATHecho "Arch      => ${def_arch}"
echo "CC        => ${RTT_CC}"
echo "PREFIX    => ${RTT_CC_PREFIX}"
echo "EXEC_PATH => ${RTT_EXEC_PATH}"

• 下载 gcc 交叉编译工具链后， 在 rt-thread/bsp/qemu-virt64-aarch64 运行

• 设置 smart_env.sh 的执行权限 $ chmod +x smart_env.sh

$ source smart_env.sh aarch64，即可设置 qemu-virt64-aarch64 的 gcc 交叉编译工具链

编译 qemu-virt64-aarch64

• 配置好 gcc 交叉编译工具链后，就可以 scons 编译了

运行 qemu

• qemu-virt64-aarch64 目录下有个 qemu.sh，可以在 Linux shell 里面直接运行

zhangsz@zhangsz:~/rtt/smart/rt-thread/bsp/qemu-virt64-aarch64$ ./qemu.sh
65536+0 records in
65536+0 records out
67108864 bytes (67 MB, 64 MiB) copied, 0.0898412 s, 747 MB/s
[I/libcpu.aarch64.cpu] Using MPID 0x0 as cpu 0
[I/libcpu.aarch64.cpu] Using MPID 0x1 as cpu 1
[I/libcpu.aarch64.cpu] Using MPID 0x2 as cpu 2
[I/libcpu.aarch64.cpu] Using MPID 0x3 as cpu 3\ | /
- RT -     Thread Operating System/ | \     5.0.0 build Mar 18 2023 19:11:052006 - 2022 Copyright by RT-Thread team
[I/libcpu.aarch64.cpu] Secondary CPU 1 booted
[I/libcpu.aarch64.cpu] Sec />ry CPU 2 booted
[I/libcpu.aarch64.cpu] Secondary CPU 3 booted
m[0m
hello rt-threadmsh />
msh />ls
No such directory
msh />QEMU: Terminated

• 退出 qemu 的方法： CTRL + a 组合按一下，松开按键，再 按一下 x 键即可退出 qemu

小结

• 由于 Linux 的环境存在差异，如qemu 之前安装过，所以 qemu-virt64-aarch64 的交叉编译环境 搭建起来并没有遇到太多的问题，如果遇到环境依赖，需要根据提示，安装 ubuntu 相应的 软件包，如 qemu 与 qemu-system-aarch64

• 当前 RT-Thread master 分支的 qemu-system-aarch64 跑的是 RT-Thread，而不是 RT-Thread Smart，后面研究如何运行 RT-Thread Smart，并用于软件组件的开发调试