明远智睿 IMX283 Linux编译手册

评估板对应的Linux版本及对应的源码文件见下表：
The corresponding Linux version of the evaluation board and the corresponding source code files are shown in the table below：

Linux程序交叉编译工具：gcc-4.4.4-glibc-2.11.1-multilib-1.0.tar.bz2
Linux program cross compiler tool:gcc-4.4.4-glibc-2.11.1-multilib-1.0.tar.bz2
Linux交叉编译工具配置文件：gcc-4.4.4-glibc-2.11.1-multilib-env
Linux cross compiler tool configuration file:gcc-4.4.4-glibc-2.11.1-multilib-env

1）源码目录
source code directory
$ mkdir -p ~/my-imx28/02_source

2）工具目录
tool directory
$ mkdir -p ~/my-imx28/03_tools

3）镜像目录
image dirrectory
$ mkdir -p ~/my-imx28/04_image

4）应用程序目录
application directory
$ mkdir -p ~/my-imx28/01_application

$ sudo apt-get update

更新完成后如下图所示：
it looks like below after the update

提示：如果编译主机的Linux是32位的，可以跳过此步骤。
tips: if Linux of compilation host is 32bit,then you can skip this step

$ sudo apt-get -y install aptitude

提示：上图为安装过aptitude后，再次执行安装命令的截图。
tips: the above image is the screenshots after re-execution of installation command when intallation of aptitude was completed.

$ sudo aptitude -y install ia32-libs

提示：上图为安装过aptitude和ia32-libs后，再次执行安装命令的截图。
tips: the above image is the screenshots after re-execution of installation command when intallation of aptitude and ia32-libs was completed

$ sudo apt-get -y install uboot-mkimage
提示：下图为安装过mkimage工具后，再次执行安装命令的截图。
tips: the following image is the screenshots after re-execution of installation command when intallation of mkimage was completed

make menuconfig对其具有依赖性质
make menuconfig is dependant to it
$ sudo aptitude -y install ncurses-dev

提示：上图为安装过ncurses-dev工具后，再次执行安装命令的截图。
tips: the above image is the screenshots after re-execution of installation command when intallation of aptitude and ia32-libs was completed

1）进入交叉编译工具链目录
enter cross compilation tool chain diretory
$ cd ~/my-imx28/03_tools/
2）复制Linux交叉编译工具到目录
copy Linux cross compilation tool to directory
将gcc-4.4.4-glibc-2.11.1-multilib-1.0.tar.bz2复制到“~/my-imx28/03_tools”，这一步自己采取相应的方式完成。
copy gcc-4.4.4-glibc-2.11.1-multilib-1.0.tar.bz2 to “~/my-imx28/03_tools”，this step need to be done in your own way。
3）解压Linux交叉编译工具
decompress Linux cross compilation tool
$ tar jxf gcc-4.4.4-glibc-2.11.1-multilib-1.0.tar.bz2

4）复制交叉编译工具配置文件
copy cross compilation tool configuration file
将gcc-4.4.4-glibc-2.11.1-multilib-env复制到“~/my-imx28/03_tools”，这一步自己采取相应的方式完成。
copy gcc-4.4.4-glibc-2.11.1-multilib-env to“~/my-imx28/03_tools”，this step need to be done in your own way
5）检查安装
check installation
$ source gcc-4.4.4-glibc-2.11.1-multilib-env
$ ${CROSS_COMPILE}gcc –v

将下载的“u-boot源码”复制到Linux开发主机的“~/my-imx28/02_source”。
copy“u-boot source code”downloaded to “~/my-imx6/02_source”of Linux development host
这一步自己采取相应的方式完成。
this step need to be done in your own way

$ cd ~/my-imx28/02_source/
$ tar jxf u-boot-2015.04.tar.bz2

$ sudo apt-get install libssl-dev

$ source ~/my-imx28/03_tools/gcc-4.4.4-glibc-2.11.1-multilib-env

$ cd ~/my-imx28/02_source/u-boot-2015.04

$ make distclean

• MY-IMX28-EVK配置示例：
  

example for MY-IMX28-EVK configuration
$ make mx28_evk_config

$ make u-boot.***
提示：这里为了提高编译速度，在make后面加了“-j4”。这里编译的Linux主机是双核4线程的，所以“-j”后面用了4，也就是采用4线程编译。“-j”后面的数字可以根据系统资源分配，但是不应该超过编译主机最大支持的线程数。
Tips：To speed up the compilation，add "-j4" after make.The Linux host used to compile is dual-core ,4 threads .So "-j" is followed by 4, which takes 4 threads to compile. The number behind "-j" is allocated based on system resources,but It should not exceed the maximum threads the host support

• 编译完成
  

complete compilation
提示：u-boot编译过程大概需要一、两分钟时间。
Tips: u-boot compiling process may take one or two minutes

• 编译文件
  

compile file
编译完成后通过ls命令即可看到编译得到的文件 u-boot.***
you can get the compiled file u-boot .*** with ls command after compilation
$ ls

• 目标文件
  

target file
MY-IMX28系列评估板的u-boot配置对应的目标文件名见下表：
The corresponding target file name for u-boot configuration of MY-IMX28 series evaluation board is shown in the table below

将下载的“linux源码”复制到Linux开发主机的“~/my-imx28/02_source”。
copy“linux source code”downloaded to “~/my-imx28/02_source”of Linux development host
这一步自己采取相应的方式完成。
this step should be done in your own way

$ cd ~/my-imx28/02_source/
$ tar jxf linux-3.14.54.tar.bz2

$ source ~/my-imx28/03_tools/gcc-4.4.4-glibc-2.11.1-multilib-env

• 进入linux源码目录
  

enter linux source code directory
$ cd ~/my-imx28/02_source/linux-3.14.54

• 清除临时文件
  

remove temporary file
$ make distclean

$ cp .mx28_config .config

• 执行编译
  

execute compilation
$ make zImage -j4

• 编译完成
  

complete compilation

• 目标文件
  

target file
arch/arm/boot/uImage即为编译得到的内核文件，使用ls命令可查看文件信息。
arch/arm/boot/uImage is the kernel file compiled，you can check file information with ls command
$ ls arch/arm/boot/uImage -la

评估板型号规格与设备树文件对应关系见下表：
The correspondence between the type of evaluation board and device tree is shown below：

• 以MY-IMX28-EVK为例
  

take MY-IMX28-EVK as an example
$ make imx28-evk.dtb

• 目标文件
  

target file
使用ls命令可查看编译得到的目标设备树文件信息：
You can browse the target device tree file information from compilation with ls command：
$ ls arch/arm/boot/dts/*.dtb

• 编译模块命令
  

command for compiling module
$ make modules

• 安装模块到指定目录
  

Install module to the specified directory
$ make modules_install INSTALL_MOD_PATH=./modules

• 打包模块文件
  

package the module file
$ cd modules
$ tar cjf ../modules.tar.bz2 *

• 进入工作目录
  

enter working directory
$ cd ~/my-imx28/01_application/

• 编写源代码
  

write souce code
$ vim hello.c
写入以下代码并保存
write following code and save

• include
  

int main(int argc, char **argv)
{
　　printf("Hello, MYZR!n");
　　return;
}

• 查看代码
  

view code
$ cat hello.c

• 配置环境变量
  

Configure environment variables
$ source ~/my-imx28/03_tools/gcc-4.4.4-glibc-2.11.1-multilib-env

• 编译
  

compile
$ ${CROSS_COMPILE}gcc hello.c -o hello.out

注意：上面的命令有包含“$”号，即“${CROSS_COMPILE}gcc”，是引用我们source时产生的环境变量。
Note:The above command contains “$”,which is “${CROSS_COMPILE}gcc”. It is the environment variable generated when referring to our source.

• 目标文件
  

target file
$ file hello.out

可以看到目标文件 hello.out 的属性。
you can see the property of target file hello.out

　　用以下的方式增加自己的应用：（把MY-IMX28_Born_ToolProfilesMX28 Linux UpdateOS Firmwarefilesimage-linux-31454/rootfs.tar.bz2复制到“~/my-imx28/04_image/”目录下）。
add your own application by the following means: (copy MY-IMX28_Born_ToolProfilesMX28 Linux UpdateOS Firmwarefilesimage-linux-31454/rootfs.tar.bz2 to directory of“~/my-imx28/04_image/”)

　　复制mkfs.ubifs，ubinize到电脑的“/usr/bin”目录下（如果电脑有这两个应用就不需要复制了）；复制build_rootfs和ubinize.cfg到“~/my-imx28/04_image/”目录。
copy mkfs.ubifs，ubinize to directory of“/usr/bin”of computer（if computer has both these two applications,the copy is not needed）；copy build_rootfs和ubinize.cfg to directory of “~/my-imx28/04_image/”

　　至此，我们在“~/my-imx28/02_source/”得到了除文件系统以外的一套烧录文件。包括“u-boot.***”、“imx28-evk.dtb”、“zImage”、“rootfs.tar.bz2”。
so far,we get a set of programing file under directory of “~/my-imx28/02_source besides file system ,including “u-boot.***”、“imx28-evk.dtb”、“zImage”、“rootfs.tar.bz2”

　　把文件“u-boot.***”、“imx28-evk.dtb”、“zImage”、“rootfs.tar.bz2复制到“MY-IMX28_Born_ToolProfilesMX28 Linux UpdateOS Firmwarefilesimage-linux-31454”目录下。按住REC按键，插上MINI USB线和电源线，接着打开MfgTool.exe,点击“扫描设备”，检测到HID设备时，松开REC按键,如下所示：
copy “u-boot.***”、“imx28-evk.dtb”、“zImage”、“rootfs.tar.bz2 to the directory of “MY-IMX28_Born_ToolProfilesMX28 Linux UpdateOS Firmwarefilesimage-linux-31454”.hold REC key,plug in MINI USB line and power cable,then open MfgTool.exe,click"scan device",detect HID device,release REC key,like below:


　　点击菜单的“Options”，然后在选项“Profiles”选择“MY-IMX28-3.14.54 NAND with uboot”，接着点击“确定”，最后点击“开始”。
click“Options”on menu，then select“MY-IMX28-3.14.54 NAND with uboot”on option of “Profiles”，then click“Enter”，finally click“start”

　　烧写成功后，点击“停止”就OK了。
when programing is successful,click"stop",to be completed
注意：如果你用的文件系统是rootfs-qt.tar.bz2，请选择“QT-MY-IMX28-3.14.54 NAND with uboot”烧写镜像。
note: if file system in use is rootfs-qt.tar.bz2, please choose “QT-MY-IMX28-3.14.54 NAND with uboot”as programing image

(1) Setup tftp server files        （下载并安装tftp）
Setup tftp server files (download and install tftp)
　　$ sudo apt-get install tftpd tftp openbsd-inetd
(2) make a tftp directory (新建tftp目录和改变其属性)
make a tftp directory (buid tftp directory and change its property)
Here we make /home/myzr/tftpt be a tftp directory.
　　$ mkdir /home/myzr/tftp
　　$ chmod 777 /home/myzr/tftp
(3) Open /etc/inetd.conf and edit it        (修改配置文件的tftp目录)
Open /etc/inetd.conf and edit it (change tftp directory of configured file)
　　$ sudo gedit /etc/inetd.conf
Coment this line :

• tftp dgram udp wait nobody /usr/***in/tcpd /usr/***in/in.tftpd /srv/tftp
  

Add new line:
tftp dgram udp wait nobody /usr/***in/tcpd /usr/***in/in.tftpd /home/myzr/tftp
(4)Restarting tftp service （重启tftp）
Restarting tftp service (reboot tftp)
　　$ sudo /etc/init.d/openbsd-inetd restart

(1) Install NFS server package （下载并安装nfs）
Install NFS server package.(download and install nfs)
　　$ sudo apt-get install nfs-kernel-server
(2) Create NFS directory:/home/myzr/nfsroot (新建nfs目录)
Create NFS directory:/home/myzr/nfsroot.(newly build nfs directory)
　　$ mkdir /home/myzr/nfsroot
(3) Configure mounted directory and authority （修改配置文件的nfs目录）
Configure mounted directory and authority.(change nfs directory of configuration file)
　　$ sudo gedit /etc/exports
Add the following line at the end of the file:
/home/myzr/nfsroot *(rw,sync,no_root_squash)
(4) Restart the NFS service （重启nfs）
Restart the NFS service.(reboot nfs)
　　$ sudo /etc/init.d/portmap restart
　　$ sudo /etc/init.d/nfs-kernel-server restart

(1) 把“u-boot.***”、“imx28-evk.dtb”、“zImage”、“filesystem.ubifs”复制到“/home/myzr/tftp”目录下。
copy “u-boot.***”、“imx28-evk.dtb”、“zImage”、“filesystem.ubifs”to the directory of “/home/myzr/tftp”
(2) 设置环境变量(板子和电脑网线直连)
set environment variables(directly connect board with computer lan line)
$ setenv ipaddr 192.168.3.104 （板子IP）

$ setenv serverip 192.168.3.110 （电脑IP）

(3) 烧写
program
$ run update_nand_kernel (烧写zImage)
$ run update_nand_kernel.(program zImage)

　　

$ run update_nand_fdt (烧写fdt)
$ run update_nand_fdt.(program fdt)

　　

$ run update_nand_filesystem (烧写文件系统)
$ run update_nand_filesyste.(program file system)

　　

插上USB转串口线和电源，开机后，差不多10秒后，在终端上敲回车键可以进入系统。
plug in USB to serial port line and power supply,enter key Enter to enter system in about 10 minutes after starting the device

　　

插上网线和电源，开机后，差不多10秒后，可以软件SecureCRT登录，板子默认以太网的IP为192.168.3.104，你可以设置电脑的IP为192.168.3.110，然后配置SecureCRT，输入用户名是root，密码myzr。如下图：
plug in lan line and power supply,you can login via software SecureCRT in about 10 minutes after starting the device,the board default ehternet IP as 192.168.3.104,you can set computer IP as 192.168.3.110,then configure SecureCRT,enter root as user name and myzr as password,like below:
　　
输入完后，点击”OK“就登录完成。
after entering is over,click "ok",the login is completed

　　插上MINI USB线，开机后，差不多10秒后，可以软件SecureCRT登录，板子默认USB的IP为192.168.4.104，你可以设置电脑的IP为192.168.4.110，然后配置SecureCRT，输入用户名是root，密码myzr。如下图：
plug in lan line and power supply,you can login via software SecureCRT in about 10 minutes after starting the device,the board default ehternet IP as 192.168.3.104,you can set computer IP as 192.168.3.110,then configure SecureCRT,enter root as user name and myzr as password,like below:
　　
输入完后，点击”OK“就登录完成。
after entering is over,click "ok",the login is completed

直接插上U盘，挂载后可看到U盘的内容。（不是QT系统，会自动挂载）
directly insert U disk,you can see the content of U disk after mounting(if it is not QT system,there will be an automatic mounting)

　　

直接插上SD卡，挂载后可看到SD卡的内容。（不是QT系统，会自动挂载）
directly SD card,you can see the content of SD card after mounting(if it is not QT system,there will be an automatic mounting)

　　

插上网线，直接用ping命令测试eth0和eth1网口。默认eth0的IP为192.168.3.104，我设置eth1为192.168.3.105。如下：
plug in lan line,test eth0 and eth1 network port directly with ping command. defaulted IP of eth0 is 192.168.3.104,let's set eth1 as 192.168.3.105,as below:

　　 　　

串口uat0的设备ttyAPP0,串口uat3的设备ttyAPP3。测试时，请短接发管脚。
device ttyAPP0 of serial port uat0,device ttyAPP3 of serial port uat3,please short connect transceiver pin in test.

　　


　　

GPIO_2_26,GPIO_2_25和GPIO_2_27已经在驱动配置为GPIO功能了，下面以管脚GPIO_2_26为例，计算GPIO_2_26的管脚号为2*32+26=90,测试如下：
GPIO_2_26,GPIO_2_25 and GPIO_2_27 were set as function of GPIO in driver configuration，take pin of GPIO_2_26 as an example to figure out the no.of pin of GPIO_2_26 is 2*32+26=90,the test as below:
　　

SPI接口为半双工模式，这里你只测发，通过示波器可观察到波形。方法一只发送0x55和0x75；方法二是发送字符串”myzr“。
SPI interface is semiduplex mode,here you only test the sending, you can see wave shape through oscilloscope .way number 1 is to only send 0x55 and 0x75,way number2 is to send charater string"myzr"

　　

　　“看门狗”，全称Watchdog timer，是一个在软件出错的时候可以复位计算机系统的硬件定时器。通常一个用户空间守护进程会在正常的时间间隔内通过/dev/watchdog 特殊设备文件来通知内核的Watchdog驱动，用户空间一切正常。如果用户空间出现问题（如RAM 错误，内核BUG 等），则通知将会停止，然后硬件Watchdog 将在超时后复位系统。
"watch dog",the full name is wathcdog timer,which is hardware timer to reset computer sytem when there is an error in software. usually a user space protect procedure will notice watchdog driver in kernel through special device /dev/watchdog in normal time interval that everything in user space is normal. if there is an error in user space(such as RAM error,kernel BUG and ect),the notice will be stopped,then hardware Watchdog will reset system after timeout.
　　测试程序中打开/dev/watchdog 设备文件，启动了Watchdog，每过一秒钟喂狗一次，系统不会重启。
/dev/watchdog device file will be opened in test program,and start Watchdog,feeding dog will happen once each second,system won't reboot.