IS200EXAMG1A系统模块卡件
f或用户登录。它应该复制到$BASEFS/etc目录下：mv$DOWNLOAD/inittab$BASEFS/etc/4.3。根文件系统–最终步骤根文件系统必须包括文件组、密码和阴影，才能登录。默认文件已创建，必须从ftp站点下载。这些文件位于以下目录下：NRC_Dev_Env_Setup_Guide_v1.0状态：已发布33 development/host/scripts/passwd将这些文件下载到主机下载目录，然后使用以下命令将其移动到/etc目录：1。cd$下载2。mv group passwd shadow$BASEFS/etc以上说明已导致在开发PC的baselinefs目录上创建根文件系统。应将此根文件系统复制到用于开发的workingfs目录中。如果在任何时候需要恢复到基准文件系统，则可以删除工作文件系统，并将基准文件系统重新复制到工作文件系统中。以下命令将删除工作文件系统并从基线文件系统中重新创建它：1。cd$TARGET 2。rm-r-f工作区3。mkdir工作模式4。cp-r baselinefs/*workingfs可以随时重新输入此命令序列以重新启动基线软件。4.3.1 NFS安装的文件系统NFS安装的根文件系统是早期软件开发最有效的配置。它允许目标访问在开发PC上创建的根文件系统，就像它是本地文件系统一样。由于文件系统在开发PC上是本地的，所以只需将文件复制到正确的本地目录，就可以使新版本的应用程序软件对目标可用。网络流量会导致执行速度下降，但在开发的初始阶段不会被注意到，而且NFS的调试编辑下载周期要快得多。NFS根文件系统在Linux内核引导过程中装载。4.3.2.第一次目标引导向目标板通电后，Linux内核加载到内存中，启动脚本将完成必要的设置，您将看到登录提示。您可以使用开发PC上定义的根密码。成功登录后，需要更改根密码并创建一个用户帐户。要设置根密码并创建用户帐户，请输入以下命令：NRC_Dev_Env_Setup_Guide_v1.0状态：已发布34 1。密码root3 2。mkdir/home 3。adduser-h/home/admin-s/bin/ash-admin 4 4.4。BusyBox提示成功完成前面的所有步骤后，将显示BusyBox磅字符（#）提示。3系统将要求您输入密码，然后重新输入以进行验证。4这将创建管理员用户ID，并提示您输入帐户的密码。NRC_Dev_Env_Setup_Guide_v1.0状态：已发布35 5。添加应用程序软件以下部分描述了在目标上运行Hello World应用程序的过程，包括：● 在哪里获取代码● 如何编译它● 在根文件系统上存储可执行文件的位置● 如何执行程序● Eclipse如何适应和● 使用Eclipse。5.1.没有Eclipse Hello World应用程序的源代码和makefile可以在ftp站点的development/target/demo目录下找到。将两个文件下载到主机下载目录中，打开终端窗口并执行以下命令：1。mkdir$BUILD/demo 2。mv$DOWNLOAD/*$BUILD/demo3。cd$BUILD/demo 4。将hello.i386可执行文件复制到$WORKFS/usr/bin目录下的根文件系统。对于安装了NFS的根文件系统，将可执行文件复制到workingfs文件系统足以使其可供目标执行。
f or user logins. It shoud be copied under $BASEFS/etc directory: mv $DOWNLOAD/inittab $BASEFS/etc 4.3. Root Filesystem – Final Steps The root filesystem must include the files group, passwd and shadow to allow login. Default files have been created and must be downloaded from the ftp site. These files are available under the directory: NRC_Dev_Env_Setup_Guide_v1.0 Status: Released 33 develop/host/scripts/passwd Download these files to the host download directory and then move them to the /etc directory using the commands: 1. cd $DOWNLOAD 2. mv group passwd shadow $BASEFS/etc The instructions above have resulted in the creation of the root filesystem on the baselinefs directory on the development PC. This root filesystem should be copied into the workingfs directory intended to be used for development. If, at any time, there is a need to revert back to the baseline filesystem, the working filesystem can be deleted and the baseline filesystem can be recopied into the working filesystem. The following commands will delete the working filesystem and recreate it from the baseline filesystem: 1. cd $TARGET 2. rm -r -f workingfs 3. mkdir workingfs 4. cp -r baselinefs/* workingfs This sequence of commands can be re-entered at any time to restart with the baseline software. 4.3.1. NFS Mounted Filesystems An NFS mounted root filesystem is the most efficient configuration for early software development. It allows the target to access the root filesystem created on the development PC as if it where a local file system. Since the filesystem is local to the development PC, new versions of application software can be made available to the target simply by copying the files to the correct local directory. There will be a decrease in execution speed caused by network traffic but it will not be noticed during the initial phases of development and the debug-edit-download cycle is much faster with NFS. The NFS root filesystem is mounted during the Linux kernel boot process. 4.3.2. The First Target Boot After applying power to the target board the Linux kernel is loaded into memory and the start-up scripts will complete the necessary set-up, you will be presented with a login prompt. You can use root password as is defined on your development PC. Upon successful login it is necessary to change the root password and to create one user account. To set the root password and create a user account, enter following commands: NRC_Dev_Env_Setup_Guide_v1.0 Status: Released 34 1. password root3 2. mkdir /home 3. adduser -h /home/admin -s /bin/ash admin 4 4.4. The BusyBox prompt With the successful completion of all of the previous steps, you will be presented with the BusyBox pound character (#) prompt. 3You will be asked to enter a password and then re-enter it for verification. 4This creates the admin user ID and prompt you to enter the password for the account. NRC_Dev_Env_Setup_Guide_v1.0 Status: Released 35 5. Adding Application Software The following section describes the procedures for running the Hello World application on the target including: ● where to get the code ● how to compile it ● where to store the executable on the root filesystem ● how to execute the program ● how Eclipse fits in and ● using Eclipse. 5.1. Without Eclipse The source code and makefile for the Hello World application can be found under the develop/target/demo directory on the ftp site. Download both files into your host download directory, open a terminal window and execute the following commands: 1. mkdir $BUILD/demo 2. mv $DOWNLOAD/* $BUILD/demo 3. cd $BUILD/demo 4. make Copy the hello.i386 executable file onto the root filesystem under the $WORKFS/usr/bin directory. With an NFS mounted root filesystem, copying the executable to the workingfs filesystem is sufficient to make it available to the target for execution.
