如何为使用 Debian 库的示例 "hello world" 程序配置 Yocto？
How to configure Yocto for an example "hello world" program which uses a Debian library?
我在我的 Debian VM 中构建了一个简单的软件。它尝试从 FTP 服务器下载文件。为此，我使用了 libcurl 库（libcurl-openssl-dev）。
现在我有一个 SAMA5D3x-Evalboard 可用。出于自学目的，我喜欢为它构建一个 Linux + 工具链。我找到了 Yocto 项目。元层概念似乎是管理不同平台的好方法 - 让我们试试吧！
我在网上找到了一些例子。但是没有涵盖 "hello world" + bigger lib.
的组合
我要：
获取 X-compile 工具链 + Linux 图像（包括我的 hello world + libcurl 共享对象）
我的做法：
- meta-atmel：用于 SAMA5D3x 评估板
- meta-debian：用于库 "libcurl-openssl-dev"
- meta-mySoftware：用于 hello world 程序
约束是：
- main.c - 你好世界程序的名称
- libcurl - c 库名（我选择了这个库，因为它有很多依赖项）
如何正确设置？如果有更好的想法欢迎提出！
Yocto 的安装和配置
I.) 安装工具链
I.1.) apt-get:
sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat libsdl1.2-dev xterm
I.2.) 选择。在代理
之后配置 git
git config --global core.gitproxy <gitproxy>
I.3.) 下载 Toolchain + 元包并检查 "right" commit
git clone git://git.yoctoproject.org/poky
cd poky
git checkout jethro
git clone git://github.com/linux4sam/meta-atmel.git
cd meta-atmel
git checkout jethro
cd ..
git clone git://git.openembedded.org/meta-openembedded
cd meta-openembedded
git checkout jethro
cd ..
II.) 为 SAMA5D3x 构建内核+rootfs
II.1) 创建新项目
source oe-init-build-env
新项目创建在 "build" 目录
通过 commandos
修改图层 "conf/bblayers.conf"
bitbake-layers add-layer "../meta-atmel"
bitbake-layers add-layer "../meta-openembedded/meta-oe"
bitbake-layers add-layer "../meta-openembedded/meta-networking"
bitbake-layers add-layer "../meta-openembedded/meta-python"
编辑 "conf/local.conf"
MACHINE ??= "sama5d3xek"
DL_DIR ?= "${TOPDIR}/../downloads"
DISTRO ?= "poky-atmel"
下载目录在构建环境之外。下载的源可用于不同的构建。
II.2) 创建图像
bitbake -c clean core-image-minimal
bitbake core-image-minimal
结果文件创建于 "tmp/deploy/images/sama5d3xek"
II.3) 闪存图像
需要 Atmel 的 sam-ba 工具。 Flash-Process 可以通过脚本自动执行（我们创建一个 tcl 文件）。自写工具 "buildAtmelImages.py" 复制 SAMA5D35 所需的映像文件，创建 u-boot 配置和 Flash-Script。一个例子：
python buildAtmelImages.py --help
python buildAtmelImages.py -s "/home/user/poky/build/tmp/deploy/images/sama5d3xek" -d "/home/user/images" -t "\\1.2.3.4\admin\images"
这里是 "buildAtmelImages.py" 的代码：
#!/usr/bin/python
# encoding: utf-8
'''
buildAtmelImages -- make yocto build images ready of the sam-ba flash tool
buildAtmelImages is a description
- reverse engineered /meta-atmel/scripts/nandflash.tcl script
- works only for the SAMA5D35
- params:
-s "<dir>" = source dir of the images generated by yocto. like "/home/user/poky/build/tmp/deploy/images/sama5d3xek"
-d "<dir>" = destination dir
-t "<dir/url>" = tcl refence dir. The path to the images, used to flash, is hard coded in the tcl script. typical example "\\192.168.1.2\admin\images" for an samba based network
- way of operation:
# hints:
I.) the SAMA5D3x implements some ECC features. This means that in every NAND sector are bits for error correction reserved.
This acts into 2 directions:
1.) the binary files have to be flashed by takeing care of the extra ECC bits. This is done by the sam-ba flash tool
2.) the kernel needs to take care, that the data stored on the NAND drive has some extra handling. This is managed by the meta-atmel package used by the yocto toolchain.
II.) u boot configuration
1.) the u boot configuration is placed into the NAND. But the configuration is not generated by the yocto toolchain. Atmel delivers a flashing script for its demo boards. This was reversed engineered into this python script.
The layout of the boot config is a defined memory space which is guared by an crc32(litle endian). The boot configuration is placed as ANSII string parameters. These parameters are seperated by a zero.
2.) because of the ecc the binary device tree(dtb) and kernel needs to be copied to memory before been executed. For that it is needed that u-boot loads them into ram before starting the kernel.
# operation:
First the generated images are copied. After the configuartion is generated and placed into the output dir. At least the tcl script is generated and placed into the output dir, as well.
@author: Stefan Jaritz
@copyright:
@license: license
@contact:
@deffield updated: Updated
'''
import sys
import os
import shutil
import binascii
import struct
from argparse import ArgumentParser
from argparse import RawDescriptionHelpFormatter
__all__ = []
__version__ = 0.1
__date__ = '2016-04-19'
__updated__ = '2016-04-19'
class _memorySeg():
def __init__(self, add, sf, df):
self.add = add
self.sf = sf
self.df = df
gArch = 'sama5d3xek'
gTCLfilename = 'SEK4.tcl'
gMemSetup = {
'bootloader' : _memorySeg(0x00000000, 'at91bootstrap-sama5d3xek.bin', 'bootloader.bin'),
'uboot' : _memorySeg(0x00040000, 'u-boot-sama5d3xek.bin', 'uboot.bin'),
'ubootEnv' : _memorySeg(0x000c0000, None, 'ubootEnv.bin'),
'ubootEnvRed' : _memorySeg(0x00100000, None, 'ubootEnv.bin'),
'dtb' : _memorySeg(0x00180000,'zImage-sama5d35ek.dtb', 'kernel.dtb'),
'kernel' : _memorySeg(0x00200000,'zImage', 'kernel'),
'rootfs' : _memorySeg(0x00800000,'core-image-minimal-sama5d3xek.ubi', 'rootfs.ubi')
}
gSourceDir = ''
gDestDir = ''
gTCLfilepath = ''
gECCcnfg = {
'at91sam9x5ek' : 0xc0c00405,
'at91sam9n12ek' : 0xc0c00405,
'sama5d3xek' :0xc0902405,
'sama5d3_xplained' : 0xc0902405,
'sama5d4ek' : 0xc1e04e07,
'sama5d4_xplained' : 0xc1e04e07
}
def _copyFiles ():
''' copies image files from source to the destination'''
global gMemSetup
for (k, ms) in gMemSetup.items():
if ms.sf is not None:
print("copy {k}".format(k=k))
shutil.copy(os.path.join(gSourceDir, ms.sf), os.path.join(gDestDir, ms.df))
def _genUBootCfg ():
global gMemSetup
global gSourceDir
global gDestDir
print("generate u-boot config")
bootCfgStr = "bootcmd=nand read 0x{dtbLoadAddr:X} 0x{dtbAddr:X} {dtbSize}; nand read 0x{kernelLoadAddr:X} 0x{kernelAddr:X} {kernelSize}; bootz 0x{kernelLoadAddr:X} - 0x{dtbLoadAddr:X}".format(
dtbLoadAddr=0x21000000,
dtbAddr=gMemSetup['dtb'].add,
dtbSize=os.path.getsize(os.path.join(gSourceDir, gMemSetup['dtb'].sf)),
kernelLoadAddr=0x22000000,
kernelAddr=gMemSetup['kernel'].add,
kernelSize=os.path.getsize(os.path.join(gSourceDir, gMemSetup['kernel'].sf))
)
bootVars = (
'bootdelay=0',
'baudrate=115200',
'stdin=serial',
'stdout=serial',
'stderr=serial',
'bootargs=console=ttyS0,115200 mtdparts=atmel_nand:256k(bootstrap)ro,512k(uboot)ro,256k(env),256k(env_redundant),256k(spare),512k(dtb),6M(kernel)ro,-(rootfs) rootfstype=ubifs ubi.mtd=7 root=ubi0:rootfs rw',
bootCfgStr
)
cfgMemCfg = bytearray(0x20000-5)
l = len(cfgMemCfg)
indx = 0
for v in bootVars:
l = len(v)
cfgMemCfg[indx:indx+l] = v.encode('utf-8')
indx += l + 1
crc = binascii.crc32(cfgMemCfg)
with open(os.path.join(gDestDir, gMemSetup['ubootEnv'].df), mode='wb') as f:
# crc32 as little endian
f.write(struct.pack('<I',crc))
f.write(bytearray(1))
f.write(cfgMemCfg)
f.close()
def _helper_genTCLFilename (idName):
pstr = os.path.join(gTCLfilepath ,gMemSetup[idName].df)
pstr = pstr.replace('/', '\')
return pstr.replace('\', '\\')
def _genFlashScript():
global gMemSetup
global gECCcnfg
global gTCLfilename
global gDestDir
global gArch
print("generate tcl script for sam-ba")
tclStr = """puts "-I- start flashing"
NANDFLASH::Init
NANDFLASH::NandHeaderValue HEADER 0x{pmeccConfig:X}
NANDFLASH::EraseAllNandFlash
NANDFLASH::SendBootFilePmeccCmd "{bootstrapFile}"
send_file {{NandFlash}} "{ubootFile}" 0x{ubootAddr:X} 0
send_file {{NandFlash}} "{ubootEnvFile}" 0x{ubootEnvAddr:X} 0
send_file {{NandFlash}} "{ubootEnvFileRed}" 0x{ubootEnvAddrRed:X} 0
send_file {{NandFlash}} "{dtbFile}" 0x{dtbAddr:X} 0
send_file {{NandFlash}} "{kernelFile}" 0x{kernelAddr:X} 0
NANDFLASH::NandSetTrimffs 1
send_file {{NandFlash}} "{rootfsFile}" 0x{rootfsAddr:X} 0
puts "-I- finished flashing"
""".format(
pmeccConfig=gECCcnfg[gArch],
bootstrapFile=_helper_genTCLFilename('bootloader'),
ubootFile=_helper_genTCLFilename('uboot'),
ubootAddr=gMemSetup['uboot'].add,
ubootEnvFile=_helper_genTCLFilename('ubootEnv'),
ubootEnvAddr=gMemSetup['ubootEnv'].add,
ubootEnvFileRed=_helper_genTCLFilename('ubootEnvRed'),
ubootEnvAddrRed=gMemSetup['ubootEnvRed'].add,
dtbFile=_helper_genTCLFilename('dtb'),
dtbAddr=gMemSetup['dtb'].add,
kernelFile=_helper_genTCLFilename('kernel'),
kernelAddr=gMemSetup['kernel'].add,
rootfsFile=_helper_genTCLFilename('rootfs'),
rootfsAddr=gMemSetup['rootfs'].add
)
with open(os.path.join(gDestDir, gTCLfilename), mode='w') as f:
f.write(tclStr)
f.close()
class _CLIError(Exception):
'''Generic exception to raise and log different fatal errors.'''
def __init__(self, msg):
super(_CLIError).__init__(type(self))
self.msg = "E: %s" % msg
def __str__(self):
return self.msg
def __unicode__(self):
return self.msg
def main(argv=None): # IGNORE:C0111
'''Command line options.'''
global gSourceDir
global gDestDir
global gTCLfilepath
if argv is None:
argv = sys.argv
else:
sys.argv.extend(argv)
program_name = os.path.basename(sys.argv[0])
program_version = "v%s" % __version__
program_build_date = str(__updated__)
program_version_message = '%%(prog)s %s (%s)' % (program_version, program_build_date)
program_shortdesc = __import__('__main__').__doc__.split("\n")[1]
program_license = '''%s
Created by Stefan Jaritz on %s.
Copyright 2016 organization_name. All rights reserved.
Licensed under the Apache License 2.0
http://www.apache.org/licenses/LICENSE-2.0
Distributed on an "AS IS" basis without warranties
or conditions of any kind, either express or implied.
USAGE
''' % (program_shortdesc, str(__date__))
try:
# Setup argument parser
parser = ArgumentParser(description=program_license, formatter_class=RawDescriptionHelpFormatter)
parser.add_argument("-s", "--source", dest="srcD", help="source path of the images [default: %(default)s]", default=os.getcwd())
parser.add_argument("-d", "--destination", dest="dstD", help="destination where the images and the flash script is copied [default: %(default)s]", default=os.getcwd() )
parser.add_argument("-t", "--tclFilePath", dest="tclD", help="TCL script path. The path where the TCL file gona be located [default: %(default)s]", default='' )
parser.add_argument('-V', '--version', action='version', version=program_version_message)
# Process arguments
args = parser.parse_args()
gSourceDir = args.srcD
gDestDir = args.dstD
gTCLfilepath = args.tclD
shutil.rmtree(gDestDir, ignore_errors=True)
os.makedirs(gDestDir)
print("start")
_copyFiles()
_genUBootCfg()
_genFlashScript()
print("finished")
return 0
except KeyboardInterrupt:
### handle keyboard interrupt ###
return -1
except Exception as e:
indent = len(program_name) * " "
sys.stderr.write(program_name + ": " + repr(e) + "\n")
sys.stderr.write(indent + " for help use --help")
return -2
if __name__ == "__main__":
sys.exit(main())
III.) 创建自己的包
yocto-layer create own
bitbake-layers add-layer "../meta-own"
修改example.bb
SRC_URI = "file://testFTP.c"
S = "${WORKDIR}"
DEPENDS ="curl"
do_compile() {
${CC} testFTP.c -o testFTP ${CFLAGS} -lcurl
}
do_install() {
install -d ${D}${bindir}
install -m 0755 testFTP ${D}${bindir}
}
现在加入"layer.conf"
IMAGE_INSTALL_append = " vim testftp"
现在 vim 编辑器和包含 testFTP 二进制文件的 testftp 配方安装在根文件系统 "user/bin" 中。
刷机完成后，启动SAMA5D35 Evalboard。以 "root" 身份登录。输入："testFTP" 或 "vim" 并享受输出。
干杯！
我在我的 Debian VM 中构建了一个简单的软件。它尝试从 FTP 服务器下载文件。为此，我使用了 libcurl 库（libcurl-openssl-dev）。
现在我有一个 SAMA5D3x-Evalboard 可用。出于自学目的，我喜欢为它构建一个 Linux + 工具链。我找到了 Yocto 项目。元层概念似乎是管理不同平台的好方法 - 让我们试试吧！ 我在网上找到了一些例子。但是没有涵盖 "hello world" + bigger lib.
的组合我要：
获取 X-compile 工具链 + Linux 图像（包括我的 hello world + libcurl 共享对象）
我的做法：
- meta-atmel：用于 SAMA5D3x 评估板
- meta-debian：用于库 "libcurl-openssl-dev"
- meta-mySoftware：用于 hello world 程序
约束是：
- main.c - 你好世界程序的名称
- libcurl - c 库名（我选择了这个库，因为它有很多依赖项）
如何正确设置？如果有更好的想法欢迎提出！
Yocto 的安装和配置
I.) 安装工具链
I.1.) apt-get:
sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat libsdl1.2-dev xterm
I.2.) 选择。在代理
之后配置 gitgit config --global core.gitproxy <gitproxy>
I.3.) 下载 Toolchain + 元包并检查 "right" commit
git clone git://git.yoctoproject.org/poky
cd poky
git checkout jethro
git clone git://github.com/linux4sam/meta-atmel.git
cd meta-atmel
git checkout jethro
cd ..
git clone git://git.openembedded.org/meta-openembedded
cd meta-openembedded
git checkout jethro
cd ..
II.) 为 SAMA5D3x 构建内核+rootfs
II.1) 创建新项目
source oe-init-build-env
新项目创建在 "build" 目录 通过 commandos
修改图层 "conf/bblayers.conf"bitbake-layers add-layer "../meta-atmel"
bitbake-layers add-layer "../meta-openembedded/meta-oe"
bitbake-layers add-layer "../meta-openembedded/meta-networking"
bitbake-layers add-layer "../meta-openembedded/meta-python"
编辑 "conf/local.conf"
MACHINE ??= "sama5d3xek"
DL_DIR ?= "${TOPDIR}/../downloads"
DISTRO ?= "poky-atmel"
下载目录在构建环境之外。下载的源可用于不同的构建。
II.2) 创建图像
bitbake -c clean core-image-minimal
bitbake core-image-minimal
结果文件创建于 "tmp/deploy/images/sama5d3xek"
II.3) 闪存图像
需要 Atmel 的 sam-ba 工具。 Flash-Process 可以通过脚本自动执行（我们创建一个 tcl 文件）。自写工具 "buildAtmelImages.py" 复制 SAMA5D35 所需的映像文件，创建 u-boot 配置和 Flash-Script。一个例子：
python buildAtmelImages.py --help
python buildAtmelImages.py -s "/home/user/poky/build/tmp/deploy/images/sama5d3xek" -d "/home/user/images" -t "\\1.2.3.4\admin\images"
这里是 "buildAtmelImages.py" 的代码：
#!/usr/bin/python
# encoding: utf-8
'''
buildAtmelImages -- make yocto build images ready of the sam-ba flash tool
buildAtmelImages is a description
- reverse engineered /meta-atmel/scripts/nandflash.tcl script
- works only for the SAMA5D35
- params:
-s "<dir>" = source dir of the images generated by yocto. like "/home/user/poky/build/tmp/deploy/images/sama5d3xek"
-d "<dir>" = destination dir
-t "<dir/url>" = tcl refence dir. The path to the images, used to flash, is hard coded in the tcl script. typical example "\\192.168.1.2\admin\images" for an samba based network
- way of operation:
# hints:
I.) the SAMA5D3x implements some ECC features. This means that in every NAND sector are bits for error correction reserved.
This acts into 2 directions:
1.) the binary files have to be flashed by takeing care of the extra ECC bits. This is done by the sam-ba flash tool
2.) the kernel needs to take care, that the data stored on the NAND drive has some extra handling. This is managed by the meta-atmel package used by the yocto toolchain.
II.) u boot configuration
1.) the u boot configuration is placed into the NAND. But the configuration is not generated by the yocto toolchain. Atmel delivers a flashing script for its demo boards. This was reversed engineered into this python script.
The layout of the boot config is a defined memory space which is guared by an crc32(litle endian). The boot configuration is placed as ANSII string parameters. These parameters are seperated by a zero.
2.) because of the ecc the binary device tree(dtb) and kernel needs to be copied to memory before been executed. For that it is needed that u-boot loads them into ram before starting the kernel.
# operation:
First the generated images are copied. After the configuartion is generated and placed into the output dir. At least the tcl script is generated and placed into the output dir, as well.
@author: Stefan Jaritz
@copyright:
@license: license
@contact:
@deffield updated: Updated
'''
import sys
import os
import shutil
import binascii
import struct
from argparse import ArgumentParser
from argparse import RawDescriptionHelpFormatter
__all__ = []
__version__ = 0.1
__date__ = '2016-04-19'
__updated__ = '2016-04-19'
class _memorySeg():
def __init__(self, add, sf, df):
self.add = add
self.sf = sf
self.df = df
gArch = 'sama5d3xek'
gTCLfilename = 'SEK4.tcl'
gMemSetup = {
'bootloader' : _memorySeg(0x00000000, 'at91bootstrap-sama5d3xek.bin', 'bootloader.bin'),
'uboot' : _memorySeg(0x00040000, 'u-boot-sama5d3xek.bin', 'uboot.bin'),
'ubootEnv' : _memorySeg(0x000c0000, None, 'ubootEnv.bin'),
'ubootEnvRed' : _memorySeg(0x00100000, None, 'ubootEnv.bin'),
'dtb' : _memorySeg(0x00180000,'zImage-sama5d35ek.dtb', 'kernel.dtb'),
'kernel' : _memorySeg(0x00200000,'zImage', 'kernel'),
'rootfs' : _memorySeg(0x00800000,'core-image-minimal-sama5d3xek.ubi', 'rootfs.ubi')
}
gSourceDir = ''
gDestDir = ''
gTCLfilepath = ''
gECCcnfg = {
'at91sam9x5ek' : 0xc0c00405,
'at91sam9n12ek' : 0xc0c00405,
'sama5d3xek' :0xc0902405,
'sama5d3_xplained' : 0xc0902405,
'sama5d4ek' : 0xc1e04e07,
'sama5d4_xplained' : 0xc1e04e07
}
def _copyFiles ():
''' copies image files from source to the destination'''
global gMemSetup
for (k, ms) in gMemSetup.items():
if ms.sf is not None:
print("copy {k}".format(k=k))
shutil.copy(os.path.join(gSourceDir, ms.sf), os.path.join(gDestDir, ms.df))
def _genUBootCfg ():
global gMemSetup
global gSourceDir
global gDestDir
print("generate u-boot config")
bootCfgStr = "bootcmd=nand read 0x{dtbLoadAddr:X} 0x{dtbAddr:X} {dtbSize}; nand read 0x{kernelLoadAddr:X} 0x{kernelAddr:X} {kernelSize}; bootz 0x{kernelLoadAddr:X} - 0x{dtbLoadAddr:X}".format(
dtbLoadAddr=0x21000000,
dtbAddr=gMemSetup['dtb'].add,
dtbSize=os.path.getsize(os.path.join(gSourceDir, gMemSetup['dtb'].sf)),
kernelLoadAddr=0x22000000,
kernelAddr=gMemSetup['kernel'].add,
kernelSize=os.path.getsize(os.path.join(gSourceDir, gMemSetup['kernel'].sf))
)
bootVars = (
'bootdelay=0',
'baudrate=115200',
'stdin=serial',
'stdout=serial',
'stderr=serial',
'bootargs=console=ttyS0,115200 mtdparts=atmel_nand:256k(bootstrap)ro,512k(uboot)ro,256k(env),256k(env_redundant),256k(spare),512k(dtb),6M(kernel)ro,-(rootfs) rootfstype=ubifs ubi.mtd=7 root=ubi0:rootfs rw',
bootCfgStr
)
cfgMemCfg = bytearray(0x20000-5)
l = len(cfgMemCfg)
indx = 0
for v in bootVars:
l = len(v)
cfgMemCfg[indx:indx+l] = v.encode('utf-8')
indx += l + 1
crc = binascii.crc32(cfgMemCfg)
with open(os.path.join(gDestDir, gMemSetup['ubootEnv'].df), mode='wb') as f:
# crc32 as little endian
f.write(struct.pack('<I',crc))
f.write(bytearray(1))
f.write(cfgMemCfg)
f.close()
def _helper_genTCLFilename (idName):
pstr = os.path.join(gTCLfilepath ,gMemSetup[idName].df)
pstr = pstr.replace('/', '\')
return pstr.replace('\', '\\')
def _genFlashScript():
global gMemSetup
global gECCcnfg
global gTCLfilename
global gDestDir
global gArch
print("generate tcl script for sam-ba")
tclStr = """puts "-I- start flashing"
NANDFLASH::Init
NANDFLASH::NandHeaderValue HEADER 0x{pmeccConfig:X}
NANDFLASH::EraseAllNandFlash
NANDFLASH::SendBootFilePmeccCmd "{bootstrapFile}"
send_file {{NandFlash}} "{ubootFile}" 0x{ubootAddr:X} 0
send_file {{NandFlash}} "{ubootEnvFile}" 0x{ubootEnvAddr:X} 0
send_file {{NandFlash}} "{ubootEnvFileRed}" 0x{ubootEnvAddrRed:X} 0
send_file {{NandFlash}} "{dtbFile}" 0x{dtbAddr:X} 0
send_file {{NandFlash}} "{kernelFile}" 0x{kernelAddr:X} 0
NANDFLASH::NandSetTrimffs 1
send_file {{NandFlash}} "{rootfsFile}" 0x{rootfsAddr:X} 0
puts "-I- finished flashing"
""".format(
pmeccConfig=gECCcnfg[gArch],
bootstrapFile=_helper_genTCLFilename('bootloader'),
ubootFile=_helper_genTCLFilename('uboot'),
ubootAddr=gMemSetup['uboot'].add,
ubootEnvFile=_helper_genTCLFilename('ubootEnv'),
ubootEnvAddr=gMemSetup['ubootEnv'].add,
ubootEnvFileRed=_helper_genTCLFilename('ubootEnvRed'),
ubootEnvAddrRed=gMemSetup['ubootEnvRed'].add,
dtbFile=_helper_genTCLFilename('dtb'),
dtbAddr=gMemSetup['dtb'].add,
kernelFile=_helper_genTCLFilename('kernel'),
kernelAddr=gMemSetup['kernel'].add,
rootfsFile=_helper_genTCLFilename('rootfs'),
rootfsAddr=gMemSetup['rootfs'].add
)
with open(os.path.join(gDestDir, gTCLfilename), mode='w') as f:
f.write(tclStr)
f.close()
class _CLIError(Exception):
'''Generic exception to raise and log different fatal errors.'''
def __init__(self, msg):
super(_CLIError).__init__(type(self))
self.msg = "E: %s" % msg
def __str__(self):
return self.msg
def __unicode__(self):
return self.msg
def main(argv=None): # IGNORE:C0111
'''Command line options.'''
global gSourceDir
global gDestDir
global gTCLfilepath
if argv is None:
argv = sys.argv
else:
sys.argv.extend(argv)
program_name = os.path.basename(sys.argv[0])
program_version = "v%s" % __version__
program_build_date = str(__updated__)
program_version_message = '%%(prog)s %s (%s)' % (program_version, program_build_date)
program_shortdesc = __import__('__main__').__doc__.split("\n")[1]
program_license = '''%s
Created by Stefan Jaritz on %s.
Copyright 2016 organization_name. All rights reserved.
Licensed under the Apache License 2.0
http://www.apache.org/licenses/LICENSE-2.0
Distributed on an "AS IS" basis without warranties
or conditions of any kind, either express or implied.
USAGE
''' % (program_shortdesc, str(__date__))
try:
# Setup argument parser
parser = ArgumentParser(description=program_license, formatter_class=RawDescriptionHelpFormatter)
parser.add_argument("-s", "--source", dest="srcD", help="source path of the images [default: %(default)s]", default=os.getcwd())
parser.add_argument("-d", "--destination", dest="dstD", help="destination where the images and the flash script is copied [default: %(default)s]", default=os.getcwd() )
parser.add_argument("-t", "--tclFilePath", dest="tclD", help="TCL script path. The path where the TCL file gona be located [default: %(default)s]", default='' )
parser.add_argument('-V', '--version', action='version', version=program_version_message)
# Process arguments
args = parser.parse_args()
gSourceDir = args.srcD
gDestDir = args.dstD
gTCLfilepath = args.tclD
shutil.rmtree(gDestDir, ignore_errors=True)
os.makedirs(gDestDir)
print("start")
_copyFiles()
_genUBootCfg()
_genFlashScript()
print("finished")
return 0
except KeyboardInterrupt:
### handle keyboard interrupt ###
return -1
except Exception as e:
indent = len(program_name) * " "
sys.stderr.write(program_name + ": " + repr(e) + "\n")
sys.stderr.write(indent + " for help use --help")
return -2
if __name__ == "__main__":
sys.exit(main())
III.) 创建自己的包
yocto-layer create own
bitbake-layers add-layer "../meta-own"
修改example.bb
SRC_URI = "file://testFTP.c"
S = "${WORKDIR}"
DEPENDS ="curl"
do_compile() {
${CC} testFTP.c -o testFTP ${CFLAGS} -lcurl
}
do_install() {
install -d ${D}${bindir}
install -m 0755 testFTP ${D}${bindir}
}
现在加入"layer.conf"
IMAGE_INSTALL_append = " vim testftp"
现在 vim 编辑器和包含 testFTP 二进制文件的 testftp 配方安装在根文件系统 "user/bin" 中。
刷机完成后，启动SAMA5D35 Evalboard。以 "root" 身份登录。输入："testFTP" 或 "vim" 并享受输出。
干杯！