linux 查看主板sn_如何使用您的工业边缘计算单元：第三章：使用你的JayBox 主板...

这篇文章是介器开源十一章节PlayBook的一部分，欢迎来给我们的提PR，我们的git地址是：https://github.com/Jieqiio/BaseJay/wiki

如何使用您的工业边缘计算单元：第三章：使用你的JayBox 主板

JayBox的主板和其他的linux主板类似，都是基于linux内核开发的系统，这个系统我们称之为BlueJayOS。使用的是高通的4G处理器，因此使用的是内核是基于高通定制的linux内核。

1. 登录终端

如果您是使用Linux，Mac电脑，则将电脑的网线接口插入到JayBox 主板，如果没有的话，需要购买一个USB/Type-C转千兆网口的转接器，电脑会自动获得IP地址，JayBox 主板的默认IP是10.100.1.254,用户名是xguard或者root,密码都是jieqi

登录后可以查看JayBox嵌入式系统的相关信息：

CPU信息

root@localhost:~# cat /proc/cpuinfoprocessor    : 0model name    : ARMv7 Processor rev 5 (v7l)BogoMIPS    : 38.40Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpaeCPU implementer    : 0x41CPU architecture: 7CPU variant    : 0x0CPU part    : 0xc07CPU revision    : 5Hardware    : Qualcomm Technologies, Inc MDM9607Revision    : 0000Serial        : 0000000000000000Processor    : ARMv7 Processor rev 5 (v7l)

系统信息

root@localhost:~# uname -aLinux localhost 3.18.20 #1 PREEMPT Mon Sep 2 14:34:31 CST 2019 armv7l GNU/Linuxroot@localhost:~# cat /proc/versionLinux version 3.18.20 (release@jieqi.io) (gcc version 4.9.2 (GCC) ) #1 PREEMPT Mon Sep 2 14:34:31 CST 2019

内存信息

root@localhost:~# free             total         used         free       shared      buffersMem:        157012       108964        48048          172            0-/+ buffers:             108964        48048Swap:            0            0            0root@localhost:~# cat /proc/meminfoMemTotal:         157012 kBMemFree:           48080 kBMemAvailable:     106732 kBBuffers:               0 kBCached:            58704 kBSwapCached:            0 kBActive:            66416 kBInactive:           9496 kBActive(anon):      17232 kBInactive(anon):      148 kBActive(file):      49184 kBInactive(file):     9348 kBUnevictable:           0 kBMlocked:               0 kBSwapTotal:             0 kBSwapFree:              0 kBDirty:                 4 kBWriteback:             0 kBAnonPages:         17232 kBMapped:             8100 kBShmem:               172 kBSlab:              15384 kBSReclaimable:       6024 kBSUnreclaim:         9360 kBKernelStack:        2176 kBPageTables:         1488 kBNFS_Unstable:          0 kBBounce:                0 kBWritebackTmp:          0 kBCommitLimit:       78504 kBCommitted_AS:     992240 kBVmallocTotal:     761856 kBVmallocUsed:       30464 kBVmallocChunk:     722940 kB

存储空间

root@localhost:~# df -hFilesystem                Size      Used Available Use% Mounted onubi0:rootfs              72.1M     46.1M     26.0M  64% /tmpfs                    64.0K      4.0K     60.0K   6% /devtmpfs                    76.3M     32.0K     76.3M   0% /runtmpfs                    76.3M     72.0K     76.3M   0% /var/volatiletmpfs                    76.3M         0     76.3M   0% /media/ramubi0:usrfs                8.6M     36.0K      8.6M   0% /data/dev/ubi1_0              38.8M     31.3M      7.5M  81% /firmwareubi2:appfs               15.2M     24.0K     15.2M   0% /vendor/appubi2:datafs              63.6M     10.4M     53.2M  16% /vendor/dataubi0:cachefs             58.3M     24.0K     55.3M   0% /cache

网络信息

JayBox主板不带Wifi，含有两个网络端口LAN和WAN，同时自带4G，标准版的主板不带eSIM，用户可以自己使用SIM卡，有没有4G,会体现在rmnet_data0这个网络适配器上，以下的的状态说明4G是正常连接中，JayBox检查到eSIM或者SIM卡后，会自动连接。

root@localhost:/bin# ifconfigbridge0   Link encap:Ethernet  HWaddr 22:0C:E6:EC:B7:4F          inet addr:192.168.1.254  Bcast:192.168.1.255  Mask:255.255.255.0          inet6 addr: fe80::200c:e6ff:fee9:b44c/64 Scope:Link          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:2770 errors:0 dropped:0 overruns:0 frame:0          TX packets:2596 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:0          RX bytes:231954 (226.5 KiB)  TX bytes:196048 (191.4 KiB)eth0      Link encap:Ethernet  HWaddr 6E:80:A8:BA:D1:30          inet6 addr: fe80::6c80:a8ff:feba:d130/64 Scope:Link          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:3051 errors:0 dropped:0 overruns:0 frame:0          TX packets:3701 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1000          RX bytes:350829 (342.6 KiB)  TX bytes:339391 (331.4 KiB)          Interrupt:108eth0.1    Link encap:Ethernet  HWaddr 6E:80:A8:BA:D1:31          inet addr:169.254.4.1  Bcast:169.254.4.255  Mask:255.255.255.0          inet6 addr: fe80::6c80:a8ff:feba:d131/64 Scope:Link          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:3051 errors:0 dropped:0 overruns:0 frame:0          TX packets:2556 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:0          RX bytes:295911 (288.9 KiB)  TX bytes:228848 (223.4 KiB)eth0.3    Link encap:Ethernet  HWaddr 6E:80:A8:BA:D1:33          inet addr:169.254.5.1  Bcast:169.254.5.255  Mask:255.255.255.0          inet6 addr: fe80::6c80:a8ff:feba:d133/64 Scope:Link          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:0 errors:0 dropped:0 overruns:0 frame:0          TX packets:1136 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:0          RX bytes:0 (0.0 B)  TX bytes:65975 (64.4 KiB)lo        Link encap:Local Loopback          inet addr:127.0.0.1  Mask:255.0.0.0          inet6 addr: ::1/128 Scope:Host          UP LOOPBACK RUNNING  MTU:65536  Metric:1          RX packets:33 errors:0 dropped:0 overruns:0 frame:0          TX packets:33 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:0          RX bytes:2604 (2.5 KiB)  TX bytes:2604 (2.5 KiB)rmnet0    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00          UP RUNNING  MTU:2000  Metric:1          RX packets:622 errors:0 dropped:0 overruns:0 frame:0          TX packets:745 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1000          RX bytes:81236 (79.3 KiB)  TX bytes:71936 (70.2 KiB)rmnet_data0 Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00          inet addr:10.42.120.164  Mask:255.255.255.248          inet6 addr: fe80::ea9c:f228:6c01:2574/64 Scope:Link          UP RUNNING  MTU:1500  Metric:1          RX packets:622 errors:0 dropped:0 overruns:0 frame:0          TX packets:745 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1000          RX bytes:75522 (73.7 KiB)  TX bytes:71936 (70.2 KiB)

2. 格式化EMMC

JayBox 标准配备有一颗8GB Toshiba 出品的工业级 Premium 级别的eMMC, 版本是5.1, 采用15nm工艺制造，最大数据传输速度是400MB/s ，工作温度是工业级的 -25 ̊C~85 ̊C, 目前的初始化系统没有格式化EMMC，首次使用需要先进行格式化，并制作文件系统后才能挂载使用。

2.1 确认EMMC已加载

ls /dev/mmcb*/dev/mmcblk0      /dev/mmcblk0rpmb

2.2 创建分区

fdisk /dev/mmcblk0The number of cylinders for this disk is set to 238592.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause problems with:1) software that runs at boot time (e.g., old versions of LILO)2) booting and partitioning software from other OSs   (e.g., DOS FDISK, OS/2 FDISK)Command (m for help): n (输入n，添加新分区)Command action   e   extended   p   primary partition (1-4)p (输入p，添加新分区为主分区)Partition number (1-4): 1 (输入1，添加分区号为1)First cylinder (1-238592, default 1): (回车，使用默认值)Using default value 1Last cylinder or +size or +sizeM or +sizeK (1-238592, default 238592): (回车，使用默认值)Using default value 238592Command (m for help): w (输入w，回写分区信息并退出程序)The partition table has been altered.Calling ioctl() to re-read partition table

2.3 查看块设备

上一步骤完成后会新生成一个mmcblk0p1的块设备，如下

ls /dev/mmc*/dev/mmcblk0      /dev/mmcblk0p1    /dev/mmcblk0rpmb

2.4.制作ext4文件系统

mkfs.ext4 /dev/mmcblk0p1root@localhost:~# mkfs.ext4 /dev/mmcblk0p1mke2fs 1.42.9 (28-Dec-2013)Discarding device blocks: doneFilesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)Stride=0 blocks, Stripe width=0 blocks477664 inodes, 1908734 blocks95436 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=195454566459 block groups32768 blocks per group, 32768 fragments per group8096 inodes per groupSuperblock backups stored on blocks:    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632Allocating group tables: doneWriting inode tables: doneCreating journal (32768 blocks): doneWriting superblocks and filesystem accounting information:done

2.5.挂载

手动挂载命令，

mount -t ext4 /dev/mmcblk0p1 /media/cardroot@localhost:~# df -hFilesystem                Size      Used Available Use% Mounted onubi0:rootfs              72.1M     45.8M     26.3M  63% /tmpfs                    64.0K      4.0K     60.0K   6% /devtmpfs                    76.3M     32.0K     76.3M   0% /runtmpfs                    76.3M     72.0K     76.3M   0% /var/volatiletmpfs                    76.3M         0     76.3M   0% /media/ramubi0:usrfs                8.6M     36.0K      8.6M   0% /data/dev/ubi1_0              38.8M     31.3M      7.5M  81% /firmwareubi2:appfs               15.2M     24.0K     15.2M   0% /vendor/appubi2:datafs              63.6M     10.4M     53.2M  16% /vendor/dataubi0:cachefs             58.3M     24.0K     55.3M   0% /cache/dev/mmcblk0p1            7.0G     16.4M      6.6G   0% /media/card

或重启设备，由系统开机自动挂载。

挂载完毕后，可以看到一个/media/card的分区，可用大小是6.6GB，接下就可以使用了。

3. 使用python

BlueJayOS内置2个版本的python，系统默认的是python2.7.9:

root@localhost:~# pythonpython             python2            python2.7          python3            python3.4          python3.4m

Python2.7.9的相关信息和默认安装包

root@localhost:~# pythonPython 2.7.9 (default, Sep  2 2019, 14:41:50)[GCC 4.9.2] on linux2Type "help", "copyright", "credits" or "license" for more information.>>> import sys as s>>> s.modules.keys()['copy_reg', 'sre_compile', '_sre', 'site', '__builtin__', 'sysconfig', 'atexit', '__main__', 'abc', 'posixpath', '_weakrefset', 'errno', 'sre_constants', 're', '_abcoll', 'types', '_warnings', 'genericpath', 'stat', 'zipimport', '_sysconfigdata', 'warnings', 'UserDict', 'sys', 'readline', 'os.path', 'sitecustomize', 'rlcompleter', 'signal', 'traceback', 'linecache', 'posix', 'exceptions', 'sre_parse', 'os', '_weakref']

Python3.4.3 的相关信息和默认安装包

root@localhost:~# python3Python 3.4.3 (default, Sep  2 2019, 14:41:56)[GCC 4.9.2] on linuxType "help", "copyright", "credits" or "license" for more information.>>> import sys as s>>> s.moduels.keys()Traceback (most recent call last):  File "", line 1, in AttributeError: 'module' object has no attribute 'moduels'>>> s.modules.keys()dict_keys(['encodings.latin_1', '_imp', 'zipimport', 'marshal', '_weakref', 'sysconfig', 'os', 'encodings.utf_8', 'genericpath', '_stat', 'sitecustomize', 'io', 'errno', 'signal', '_sysconfigdata', '_frozen_importlib', 'encodings.aliases', 'posix', 'codecs', 'abc', 'os.path', 'encodings.ascii', '_weakrefset', 'sys', '_io', 'readline', '_collections_abc', '_thread', 'encodings', 'rlcompleter', 'site', '_codecs', 'stat', '_warnings', '_sitebuiltins', 'builtins', '__main__', 'posixpath', 'atexit'])

4. 使用Perl

BlueJayOS内置Perl，版本是Perl 5.20.0

root@localhost:~# perlperl        perl5.20.0root@localhost:~# perl -versionThis is perl 5, version 20, subversion 0 (v5.20.0) built for arm-linux-gnueabiCopyright 1987-2014, Larry WallPerl may be copied only under the terms of either the Artistic License or theGNU General Public License, which may be found in the Perl 5 source kit.Complete documentation for Perl, including FAQ lists, should be found onthis system using "man perl" or "perldoc perl".  If you have access to theInternet, point your browser at http://www.perl.org/, the Perl Home Page.

5 使用GPIO

5.1 引脚编号

5.2 使有电平转换：

echo 11 > /sys/class/gpio/exportecho out > /sys/class/gpio/gpio11/directionecho 1 > /sys/class/gpio/gpio11/value

5.3 打开GPIO0

echo 0 > /sys/class/gpio/exportecho out > /sys/class/gpio/gpio0/directionecho 1 > /sys/class/gpio/gpio0/value

5.4 关闭GPIO_0

echo 0 > /sys/class/gpio/gpio0/value

5.5 再次打开

echo 1 > /sys/class/gpio/gpio0/value

以上为第三章节内容，我们陆续会推出以下新章节：

如何使用您的工业边缘计算单元

内容

第一章：了解您的JayBox 主板

第二章：开始使用您的JayBox 主板

第三章：使用你的JayBox 主板

第四章：使用易于编译的BaseJay开始编写程序

第五章：使用用Python编程

第六章：使用用C语言编程

第七章：使用BaseJay并编译你的应用

第八章：使用GPIO引脚进行物理计算

第9章：编程使用Modbus。

第10章：编程使用OPC-UA

第11章：使用MQTT的编程。

附录

附录A：命令行界面

附录B：JayBox 主板规格

附录C：JayBox主板4G及以太网带宽测试

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