一、实验目的和要求
u 了解嵌入式板卡一般情况
u 熟悉pcDuino的供电、调试串口等接线方式
u 熟悉Linux启动过程
u 熟悉通过Linux获得硬件数据
u 熟练掌握串口在PC上的使用
u 熟练掌握Linux的以太网和WiFi配置
u 熟练掌握Linux的SSH配置
u 熟练掌握PC上的SSH软件
u 掌握嵌入式板卡和PC建立文件共享的方式
u 寻找和安装交叉编译环境，理解交叉编译
u 熟悉嵌入式板卡的Linux下的编程环境
u 了解远程访问嵌入式板卡图形桌面的方式
二、实验内容和原理
1、启动板子
l 在PC上安装好USB串口驱动和串口终端软件
l 按照板卡的要求，将USB串口线与实验板卡连接好，并连接好以太网
l 接上HDMI线和HDMI显示器（可选）
l 拍摄板卡及连线
l 给板卡上电，记录启动过程的输出
2、网络连接
l 从串口终端软件登陆板卡的Linux，配置网络，从板卡和PC两端证明网络已连接
l 配置板卡上的Linux的SSH，可尝试采用各种不同的认证方式
l 从PC通过SSH登录板卡
l 看到多个不同端口的登陆（本机键盘/屏幕、串口和SSH）同时在线，并运用Linux的write来互相通信
3、文件传输
l 尝试各种与嵌入式板卡传递文件的方式并做比较
l 通过SAMBA共享
l 通过NFS共享（选做）
l 通过sftp传递
l 通过串口XModem协议传递
4、开发环境
l 选择和安装PC上的交叉编译环境
l 交叉编译C语言的浮点运算程序到板卡上去运行，证明所编译的程序是ARM的
l 尝试板卡上的三个语言的开发环境：C/C++、Python和Java
5、远程图形访问
l 尝试各种从PC远程访问板卡图形桌面的方式
l x-window（通过SSH）
l RDP
l VNC
6、扩展内容（可选）
l 板卡上的Linux默认设置以太网为DHCP方式，如何配置一个DHCP局域网并找到板卡的IP
l 配置嵌入式板卡上的SAMBA服务端，让PC可以读写嵌入式板卡上的目录
l 在PC上交叉编译用到STL库的C++程序到嵌入式板卡上运行
l 在PC上编译Java程序到嵌入式板卡上运行，尝试GUI、多线程和socket编程（可能要用到通过SSH执行远端X程序的手段）
l 寻找一种嵌入式板卡上用的GUI IDE。
三、实验步骤和结果记录
1、启动板子
安装 minicom
设置波特率和软流控等
给板卡上电，记录启动过程的输出
拍摄板卡及连线：
2、网络连接
l 从串口终端软件登陆板卡的Linux，配置网络，从板卡和PC两端证明网络已连接
pcDuino没有无线网卡,不能通过wifi上网。我的方案是用网线将pcDuino和笔记本连接起来,通过笔记本的共享wifi实现上网。
首先在网络管理器中新建一个共享连接：
当pcDuino通过网线连上笔记本时,选择连接新建的share网络
此时pcDuino的ip配置如图：
笔记本上的ip配置如图：
测试连通情况，从两边都能ping通：
pcDuino可以访问互联网: ping www.baidu.com
l 从笔记本通过SSH登录板卡:
l 配置板卡上的Linux的SSH，可尝试采用各种不同的认证方式:
配置rsa公钥到pcDuino上：
通过私钥，免密码ssh登陆:
l 看到多个不同端口的登陆（本机键盘/屏幕、串口和SSH）同时在线，并运用Linux的write来互相通信
现在可以看到串口,屏幕和ssh这3个tty:
ttymxc0,tty1和pts/0.
运用Linux的write来互相通信：
3、文件传输
尝试各种与嵌入式板卡传递文件的方式并做比较
l 通过SAMBA共享
安装samba：
建立共享目录mkdir/home/samba && chmod 777 /home/samba
修改配置文件/etc/samba/smb.conf,添加security=share,并在末尾添加
启动Samba服务 /etc/init.d/smbd retart
在文件管理器地址栏中输入smb://10.42.0.58/share,即可访问：
l -通过NFS
共享(选做)
安装nfs服务器
设置/etc/exports
重启nfs服务
挂载nfs
l 通过sftp传递
在/etc/ssh/sshd_config中添加下列设置：
Subsystem sftp internal-sftp
Match Group sftp
ChrootDirectory /home/samba
ForceCommand internal-sftp
AllowTcpForwarding no
笔记本访问sftp服务
l 过串口XModem
协议传递
安装rx
命令：
运行rx命令;再Ctrl+A,Z,S ,选择xmodem，就会跳出一个选择传送文件的界面，选择好文件后，回车
4、开发环境
l 选择和安装PC上的交叉编译环境
安装gcc-arm-linux-gnueabihf:
l 交叉编译C语言的浮点运算程序到板卡上去运行，证明所编译的程序是ARM的
l 尝试板卡上的三个语言的开发环境：C/C++、Python和Java
C/C++，JAVA和Python版本：
C/C++:
Python:
Java:
5、远程图形访问
l x-window（通过SSH）
通过ssh -X命令
l RDP
板子上安装xrdp
笔记本上rdp客户端可采用remmina和gnome-rdp等.remmina已在ubuntu上默认安装,可直接运行：
remmina配置：
连接
l VNC
在板子上安装tightvncserver
设置密码及在配置文件中将Xsession改为lxsession
依然通过remmina访问vnc，具体配置：
vnc连接：
6、扩展内容（可选）
l 板卡上的Linux默认设置以太网为DHCP方式，如何配置一个DHCP局域网并找到板卡的IP
我的板卡就是以 dhcp方式联网的,笔记本共享wifi到有线网卡,有线网卡担当dhcp服务器.
板卡IP如下：
l 配置嵌入式板卡上的SAMBA服务端，让PC可以读写嵌入式板卡上的目录
已经在上述步骤中完成
l 在PC上交叉编译用到STL库的C++程序到嵌入式板卡上运行
安装g++交叉编译环境g++-arm-linux-gnueabihf
g++程序及交叉编译:
运行c++程序:
l 在PC上编译Java程序到嵌入式板卡上运行，尝试GUI、多线程和socket编程（可能要用到通过SSH执行远端X程序的手段)
l 寻找一种嵌入式板卡上用的GUI IDE。
安装codelite
打开codelite
四、实验结果分析
l 画出所实际实施的连接示意图
l 给出实际拍摄的板卡连接照片
l 给出所用的器材的列表
pcDuino实验板 x 1
5V/1A电源 x 1
microUSB线 x 1
网线 x 1
l 给出拷贝得到的pcDuino启动时的输出文字，并逐行解释
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#U-boot版本和编译日期 U-Boot 2009.08 (Dec 11 2014 - 20:20:23) #硬件检测：CPU，温度传感器，时钟，主板等 #CPU型号 CPU: Freescale i.MX6 family TO1.2 at 792 MHz #温度传感器 Thermal sensor with ratio = 174 Temperature: 32 C, calibration data 0x54f4c669 #CPU信息 mx6q pll1: 792MHz mx6q pll2: 528MHz mx6q pll3: 480MHz mx6q pll8: 50MHz #设置时钟频率 ipg clock : 66000000Hz ipg per clock : 66000000Hz uart clock : 80000000Hz cspi clock : 60000000Hz ahb clock : 132000000Hz axi clock : 264000000Hz emi_slow clock: 132000000Hz ddr clock : 528000000Hz usdhc1 clock : 198000000Hz usdhc2 clock : 198000000Hz usdhc3 clock : 198000000Hz usdhc4 clock : 198000000Hz nfc clock : 24000000Hz #主板信息 Board: i.MX6Q-SABRESD: unknown-board Board: 0x63012 [POR ] #SD卡信息 Boot Device: MMC I2C: ready #内存信息 DRAM: 1 GB #串口检测 MMC: FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3 In: serial Out: serial Err: serial config_ipu_di_clk: freq = 148500000. wait for pll5 lock. config_ipu_di_clk: set pll5 clock to 297000000Hz. Found PFUZE100! deviceid=10,revid=11 #网卡检测 Net: got MAC address from IIM: 00:00:00:00:00:00 FEC0 [PRIME] Hit any key to stop autoboot: 0 mmc3(part 0) is current device #读入SD卡里的linux内核 ＃内核版本 ＃内核类型 ＃内核大小 ＃读入地址 ＃入口地址 MMC read: dev # 3, block # 2048, count 10240 ... 10240 blocks read: OK ## Booting kernel from Legacy Image at 10800000 ... Image Name: Linux-3.0.35-2666-gbdde708 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 4422312 Bytes = 4.2 MB Load Address: 10008000 Entry Point: 10008000 Verifying Checksum ... OK Loading Kernel Image ... OK OK #启动linux内核 Starting kernel ... # 解压内核 Uncompressing Linux... done, booting the kernel. #内核信息，版本号，gcc版本 Linux version 3.0.35-2666-gbdde708 ([email protected]) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #218 SMP PREEMPT Thu Dec 18 22:32:36 PST 2014 #CPU型号 CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache #主板 Machine: Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board #内存读写策略 Memory policy: ECC disabled, Data cache writealloc CPU identified as i.MX6Q, silicon rev 1.2 PERCPU: Embedded 7 pages/cpu @8c008000 s5472 r8192 d15008 u32768 #建立zonelists Built 1 zonelists in Zone order, mobility grouping on. Total pages: 194560 #终端设置 Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk0p1 rootwait fec_mac=4c:53:54:f4:c6:69 video=mxcfb0:dev=hdmi,[email protected],if=RGB24,bpp=32M #建立PID hash table PID hash table entries: 4096 (order: 2, 16384 bytes) #建立文件系统Dentry 和 Inode cache hast table Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) #检测内存 Memory: 512MB 256MB = 768MB total Memory: 764648k/764648k available, 283928k reserved, 0K highmem Virtual kernel memory layout: vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) DMA : 0xf4600000 - 0xffe00000 ( 184 MB) vmalloc : 0xc0800000 - 0xf2000000 ( 792 MB) lowmem : 0x80000000 - 0xc0000000 (1024 MB) pkmap : 0x7fe00000 - 0x80000000 ( 2 MB) modules : 0x7f000000 - 0x7fe00000 ( 14 MB) .init : 0x80008000 - 0x8003e000 ( 216 kB) .text : 0x8003e000 - 0x80b93ca8 (11608 kB) .data : 0x80b94000 - 0x80bff600 ( 430 kB) .bss : 0x80bff624 - 0x80c58d0c ( 358 kB) SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1 Preemptible hierarchical RCU implementation. NR_IRQS:624 MXC GPIO hardware sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms arm_max_freq=1GHz #串口终端配置 MXC_Early serial console at MMIO 0x2020000 (options ‘115200‘) bootconsole [ttymxc0] enabled Console: colour dummy device 80x30 Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280) #最大进程数 pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 512 #CPU测试和启动 CPU: Testing write buffer coherency: ok hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available CPU1: Booted secondary processor CPU2: Booted secondary processor CPU3: Booted secondary processor Brought up 4 CPUs SMP: Total of 4 processors activated (6324.22 BogoMIPS). print_constraints: dummy: #电压范围设置 NET: Registered protocol family 16 print_constraints: vddpu: 725 <--> 1300 mV at 700 mV fast normal print_constraints: vddcore: 725 <--> 1300 mV at 1150 mV fast normal print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal hw-breakpoint: found 6 breakpoint and 1 watchpoint registers. hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step. hw-breakpoint: maximum watchpoint size is 4 bytes. L310 cache controller enabled l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B bio: create slab <bio-0> at 0 mxs-dma mxs-dma-apbh: initialized print_constraints: SPKVDD: 4200 mV print_constraints: vmmc: 3300 mV #装载USB OTG驱动 SCSI subsystem initialized spi_imx imx6q-ecspi.0: probed spi_imx imx6q-ecspi.2: probed usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb Freescale USB OTG Driver loaded, $Revision: 1.55 $ #时钟和电压设置 set the i2c clk:100000 Hz mc_pfuze 1-0008: ID: 0,Full lay: 1 ,Metal lay: 1 mc_pfuze 1-0008: FAB: 0 ,FIN: 0 print_constraints: PFUZE100_SW1A: 300 <--> 1875 mV at 1300 mV print_constraints: PFUZE100_SW1B: 300 <--> 1875 mV at 300 mV print_constraints: PFUZE100_SW1C: 300 <--> 1875 mV at 1300 mV print_constraints: PFUZE100_SW2: 800 <--> 3950 mV at 3300 mV print_constraints: PFUZE100_SW3A: 400 <--> 1975 mV at 1500 mV print_constraints: PFUZE100_SW3B: 400 <--> 1975 mV at 1500 mV print_constraints: PFUZE100_SW4: 800 <--> 3950 mV at 3150 mV print_constraints: PFUZE100_SWBST: 5000 <--> 5150 mV at 5000 mV print_constraints: PFUZE100_VSNVS: 1200 <--> 3000 mV at 1800 mV print_constraints: PFUZE100_VREFDDR: at 750 mV print_constraints: PFUZE100_VGEN1: 800 <--> 1550 mV at 1500 mV print_constraints: PFUZE100_VGEN2: 800 <--> 1550 mV at 1500 mV print_constraints: PFUZE100_VGEN3: 1800 <--> 3300 mV at 2800 mV print_constraints: PFUZE100_VGEN4: 1800 <--> 3300 mV at 1800 mV print_constraints: PFUZE100_VGEN5: 1800 <--> 3300 mV at 3000 mV print_constraints: PFUZE100_VGEN6: 1800 <--> 3300 mV at 3300 mV imx-ipuv3 imx-ipuv3.0: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7) imx-ipuv3 imx-ipuv3.1: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7) mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 driver probed mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 dphy version is 0x3130302a MIPI CSI2 driver module loaded #装载声卡、蓝牙、无线驱动 Advanced Linux Sound Architecture Driver Version 1.0.24. Bluetooth: Core ver 2.16 NET: Registered protocol family 31 Bluetooth: HCI device and connection manager initialized Bluetooth: HCI socket layer initialized Bluetooth: L2CAP socket layer initialized Bluetooth: SCO socket layer initialized cfg80211: Calling CRDA to update world regulatory domain i2c-core: driver [max17135] using legacy suspend method i2c-core: driver [max17135] using legacy resume method Switching to clocksource mxc_timer1 FS-Cache: Loaded #配置网络协议：TCP、UDP、RPC NET: Registered protocol family 2 IP route cache hash table entries: 32768 (order: 5, 131072 bytes) TCP established hash table entries: 131072 (order: 8, 1048576 bytes) TCP bind hash table entries: 65536 (order: 7, 786432 bytes) TCP: Hash tables configured (established 131072 bind 65536) TCP reno registered UDP hash table entries: 512 (order: 2, 16384 bytes) UDP-Lite hash table entries: 512 (order: 2, 16384 bytes) NET: Registered protocol family 1 RPC: Registered named UNIX socket transport module. RPC: Registered udp transport module. RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. PMU: registered new PMU device of type 0 #电源管理 Static Power Management for Freescale i.MX6 wait mode is enabled for i.MX6 cpaddr = c0880000 suspend_iram_base=c0934000 PM driver module loaded IMX usb wakeup probe add wake up source irq 75 IMX usb wakeup probe cpu regulator mode:ldo_bypass _regulator_get: get() with no identifier mx6_cpu_regulator_init: failed to get pu regulator i.MXC CPU frequency driver #注册NTFS和JFFS2文件系统 nfs4filelayout_init: NFSv4 File Layout Driver Registering... Installing knfsd (copyright (C) 1996 [email protected]). NTFS driver 2.1.30 [Flags: R/W]. JFFS2 version 2.2. (NAND) 锟铰?2001-2006 Red Hat, Inc. fuse init (API version 7.16) msgmni has been set to 1493 alg: No test for stdrng (krng) io scheduler noop registered io scheduler deadline registered io scheduler cfq registered (default) mxc_mipi_dsi mxc_mipi_dsi: i.MX MIPI DSI driver probed MIPI DSI driver module loaded #视频输出配置 mxc_sdc_fb mxc_sdc_fb.0: register mxc display driver hdmi mxc_hdmi mxc_hdmi: Detected HDMI controller 0x13:0xa:0xa0:0xc1 fbcvt: [email protected]: CVT Name - 2.073M9 imx-ipuv3 imx-ipuv3.0: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7) Console: switching to colour frame buffer device 240x67 mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver ldb _regulator_get: get() with no identifier mxc_sdc_fb mxc_sdc_fb.2: register mxc display driver lcd mxc_sdc_fb mxc_sdc_fb.2: ipu0-di0 already in use mxc_sdc_fb: probe of mxc_sdc_fb.2 failed with error -16 mxc_sdc_fb mxc_sdc_fb.3: register mxc display driver ldb imx-sdma imx-sdma: loaded firmware 1.1 imx-sdma imx-sdma: initialized Serial: IMX driver imx-uart.2: ttymxc2 at MMIO 0x21ec000 (irq = 60) is a IMX imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX console [ttymxc0] enabled, bootconsole disabled console [ttymxc0] enabled, bootconsole disabled loop: module loaded No sata disk. GPMI NAND driver registered. (IMX) vcan: Virtual CAN interface driver CAN device driver interface flexcan netdevice driver FEC Ethernet Driver fec_enet_mii_bus: probed #USB设备检测 ehci_hcd: USB 2.0 ‘Enhanced‘ Host Controller (EHCI) Driver fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1 fsl-ehci fsl-ehci.0: irq 75, io base 0x02184000 fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00 usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 usb usb1: Product: Freescale On-Chip EHCI Host Controller usb usb1: Manufacturer: Linux 3.0.35-2666-gbdde708 ehci_hcd usb usb1: SerialNumber: fsl-ehci.0 hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected add wake up source irq 72 fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2 fsl-ehci fsl-ehci.1: irq 72, io base 0x02184200 fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00 #建立USB设备连接 usb usb2: New USB device found, idVendor=1d6b, idProduct=0002 usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 usb usb2: Product: Freescale On-Chip EHCI Host Controller usb usb2: Manufacturer: Linux 3.0.35-2666-gbdde708 ehci_hcd usb usb2: SerialNumber: fsl-ehci.1 hub 2-0:1.0: USB hub found hub 2-0:1.0: 1 port detected usbcore: registered new interface driver wusb-cbaf usbcore: registered new interface driver cdc_acm cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters usbcore: registered new interface driver uas Initializing USB Mass Storage driver... usbcore: registered new interface driver usb-storage USB Mass Storage support registered. usbcore: registered new interface driver usbserial USB Serial support registered for generic usbcore: registered new interface driver usbserial_generic usbserial: USB Serial Driver core USB Serial support registered for FTDI USB Serial Device usbcore: registered new interface driver ftdi_sio ftdi_sio: v1.6.0:USB FTDI Serial Converters Driver USB Serial support registered for Moschip 7840/7820 USB Serial Driver mos7840: 1.3.2:Moschip 7840/7820 USB Serial Driver usbcore: registered new interface driver mos7840 ARC USBOTG Device Controller driver (1 August 2005) mousedev: PS/2 mouse device common for all mice input: gpio-keys as /devices/platform/gpio-keys/input/input0 i2c-core: driver [isl29023] using legacy suspend method i2c-core: driver [isl29023] using legacy resume method snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc0 i2c /dev entries driver #linux图像采集卡检测 Linux video capture interface: v2.00 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video16 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video17 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video18 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video19 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video20 i2c-core: driver [mag3110] using legacy suspend method i2c-core: driver [mag3110] using legacy resume method imx2-wdt imx2-wdt.0: IMX2+ Watchdog Timer enabled. timeout=60s (nowayout=1) #蓝牙驱动 Bluetooth: Virtual HCI driver ver 1.3 Bluetooth: HCI UART driver ver 2.2 Bluetooth: HCIATH3K protocol initialized Bluetooth: Generic Bluetooth USB driver ver 0.6 usbcore: registered new interface driver btusb sdhci: Secure Digital Host Controller Interface driver sdhci: Copyright(c) Pierre Ossman mmc0: SDHCI controller on platform [sdhci-esdhc-imx.3] using DMA mmc1: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA sdhci sdhci-esdhc-imx.2: no write-protect pin available! mmc2: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA mxc_vdoa mxc_vdoa: i.MX Video Data Order Adapter(VDOA) driver probed VPU initialized mxc_asrc registered Galcore version 4.6.9.6622 Thermal calibration data is 0x54f4c669 Thermal sensor with ratio = 174 Anatop Thermal registered as thermal_zone0 anatop_thermal_probe: default cooling device is cpufreq! leds-gpio: probe of leds-gpio failed with error -16 usbcore: registered new interface driver usbhid usbhid: USB HID core driver usb 2-1: new high speed USB device number 2 using fsl-ehci usbcore: registered new interface driver snd-usb-audio mxc_hdmi_soc mxc_hdmi_soc.0: MXC HDMI Audio Cirrus Logic CS42888 ALSA SoC Codec Driver i2c-core: driver [cs42888] using legacy suspend method i2c-core: driver [cs42888] using legacy resume method mmc0: new high speed DDR MMC card at address 0001 mmcblk0: mmc0:0001 SEM08G 7.39 GiB mmcblk0boot0: mmc0:0001 SEM08G partition 1 2.00 MiB mmcblk0boot1: mmc0:0001 SEM08G partition 2 2.00 MiB mmcblk0: p1 mmcblk0boot1: unknown partition table mmcblk0boot0: unknown partition table wm8962 0-001a: customer id 0 revision D input: WM8962 Beep Generator as /devices/platform/imx-i2c.0/i2c-0/0-001a/input/input1 asoc: wm8962 <-> imx-ssi.1 mapping ok input: wm8962-audio DMIC as /devices/platform/soc-audio.5/sound/card0/input2 input: wm8962-audio Ext Spk as /devices/platform/soc-audio.5/sound/card0/input3 usb 2-1: New USB device found, idVendor=05e3, idProduct=0608 usb 2-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0 usb 2-1: Product: USB2.0 Hub hub 2-1:1.0: USB hub found imx_3stack asoc driver hub 2-1:1.0: 4 ports detected asoc: mxc-hdmi-soc <-> imx-hdmi-soc-dai.0 mapping ok ALSA device list: #0: wm8962-audio #1: imx-hdmi-soc NET: Registered protocol family 26 TCP cubic registered NET: Registered protocol family 17 can: controller area network core (rev 20090105 abi 8) NET: Registered protocol family 29 can: raw protocol (rev 20090105) can: broadcast manager protocol (rev 20090105 t) Bluetooth: RFCOMM TTY layer initialized Bluetooth: RFCOMM socket layer initialized Bluetooth: RFCOMM ver 1.11 Bluetooth: BNEP (Ethernet Emulation) ver 1.3 Bluetooth: BNEP filters: protocol multicast Bluetooth: HIDP (Human Interface Emulation) ver 1.2 NET: Registered protocol family 33 lib80211: common routines for IEEE802.11 drivers Registering the dns_resolver key type VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4 Bus freq driver module loaded Bus freq driver Enabled mxc_dvfs_core_probe DVFS driver module loaded kAFS: Red Hat AFS client v0.1 registering. regulator_init_complete: PFUZE100_VGEN6: incomplete constraints, leaving on regulator_init_complete: PFUZE100_VGEN3: incomplete constraints, leaving on regulator_init_complete: PFUZE100_VGEN2: incomplete constraints, leaving on regulator_init_complete: PFUZE100_VGEN1: incomplete constraints, leaving on snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 00:01:35 UTC (95) #ext3文件系统 EXT3-fs: barriers not enabled EXT3-fs (mmcblk0p1): warning: maximal mount count reached, running e2fsck is recommended kjournald starting. Commit interval 5 seconds EXT3-fs (mmcblk0p1): using internal journal EXT3-fs (mmcblk0p1): mounted filesystem with writeback data mode VFS: Mounted root (ext3 filesystem) on device 179:1. Freeing init memory: 216K ov5640_read_reg:write reg error:reg=300a ov5642_read_reg:write reg error:reg=300a ov5640_read_reg:write reg error:reg=300a #成功登录 #登录后的版本和文档信息 Last login: Thu Jan 1 08:00:05 CST 1970 on tty1 Welcome to Linaro 12.11 (GNU/Linux 3.0.35-2666-gbdde708 armv7l) * Documentation: https://wiki.linaro.org/ * Starting ISC DHCP IPv4 server[ OK ] * Exporting directories for NFS kernel daemon... exportfs: /etc/exports [2]: Neither ‘subtree_check‘ or ‘no_subtree_check‘ specified for expor. Assuming default behaviour (‘no_subtree_check‘). NOTE: this default has changed since nfs-utils version 1.0.x exportfs: /etc/exports [4]: Neither ‘subtree_check‘ or ‘no_subtree_check‘ specified for export "127.0.0.1/255.255.255.0:/home/nfs". Assuming default behaviour (‘no_subtree_check‘). NOTE: this default has changed since nfs-utils version 1.0.x [ OK ] * Starting NFS kernel daemon rpc.nfsd: address family inet6 not supportNFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directoy ed by protocol TCP NFSD: starting 90-second grace period rpc.mountd: svc_tli_create: could not open connection for udp6 rpc.mountd: svc_tli_create: could not open connection for tcp6 rpc.mountd: svc_tli_create: could not open connection for udp6 rpc.mountd: svc_tli_create: could not open connection for tcp6 [ OK ] [email protected]:~# [drm] Initialized drm 1.1.0 20060810 [drm] Initialized vivante 1.0.0 20120216 on minor 0 Starting xl2tpd: xl2tpd. * Starting Remote Desktop Protocol server ehci_fsl_bus_suspend begins, Host 1 ehci_fsl_bus_suspend ends, Host 1 [ OK ] init: plymouth-stop pre-start process (3184) terminated with status 1 init: tty1 main process (3185) killed by TERM signal |
l 如何通过Linux获得硬件及操作系统数据
CPU信息
内存信息
操作系统信息
gcc版本
文件系统
l 给出网络配置参数，截屏给出从板卡和PC两端得到的网络已连接的证明
auto lo
iface lo inet loopback
iface eth0 inet dhcp
l 给出SSH配置文件，并解释其中内容
Port 22
使用22号端口
Protocol 2
指定 sshd(8)
支持的SSH协议的版本号。
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
主机私钥文件的位置
UsePrivilegeSeparation yes
用户权限分离，创建用户子进程
KeyRegenerationInterval 3600
在SSH-1协议下，短命的服务器密钥将以3600秒为周期不断重新生成
ServerKeyBits 768
指定临时服务器密钥的长度。仅用于SSH-1。默认值是 768(位)。最小值
是 512
。
SyslogFacility AUTH
指定 sshd(8)
将日志消息通过AUTH日志子系统(facility)发送
LogLevel INFO
指定 sshd(8)
的日志等级(详细程度)为INFO
LoginGraceTime 120
限制用户必须在指定的时限内认证成功，0
表示无限制。默认值是 120
秒。
PermitRootLogin yes
允许root用户登录
StrictModes yes
指定是否要求 sshd(8)
在接受连接请求前对用户主目录和相关的配置文
件进行宿主和权限检查
RSAAuthentication yes
是否允许使用纯 RSA
公钥认证。仅用于SSH-1
IgnoreRhosts yes
是否在 RhostsRSAAuthentication
或 HostbasedAuthentication
过程中忽
略 .rhosts
RhostsRSAAuthentication no
是否使用强可信主机认证(通过检查远程主机名和关联的用户名进行认
证)。仅用于SSH-1。
HostbasedAuthentication no
这个指令与 RhostsRSAAuthentication
类似，但是仅可以用于SSH-2。
PermitEmptyPasswords no
是否允许密码为空的用户远程登录
ChallengeResponseAuthentication no
是否允许质疑-应答(challenge-response)认证
X11Forwarding yes
是否允许进行 X11
转发。
X11DisplayOffset 10
指定 sshd(8) X11
转发的第一个可用的显示区(display)数字。
PrintMotd no
指定 sshd(8)
是否在每一次交互式登录时打印 /etc/motd文件的内容.
PrintLastLog yes
指定 sshd(8)
是否在每一次交互式登录时打印最后一位用户的登录时间
TCPKeepAlive yes
指定系统是否向客户端发送 TCP keepalive
消息
AcceptEnv LANG LC_*
指定客户端发送的哪些环境变量将会被传递到会话环境中。
Subsystem sftp /usr/lib/openssh/sftp-server
配置一个外部子系统。仅用于SSH-2协议。
UsePAM yes
使用PAM验证
Subsystem sftp internal-sftp
指定使用sftp服务使用系统自带的internal-sftp
Match Group sftp
匹配sftp组的用户
ChrootDirectory /home/samba
用chroot将用户的根目录指定到/home/samba
ForceCommand internal-sftp
指定sftp命令
AllowTcpForwarding no
禁止用户使用端口转发
l 存在多个登陆时，如何看到不同端口的登陆，给出截屏结果
w命令：
l 给出嵌入式板卡上的SAMBA配置文件内容，并逐行解释
workgroup = WORKGROUP
设定 Samba Server
所要加入的工作组或者域
server string = %h server (Samba, Ubuntu)
设定 Samba Server
的注释
dns proxy = no
关闭dns代理服务。
log file = /var/log/samba/log.%m
设置Samba Server日志文件的存储位置以及日志文件名称
max log size = 1000
设置Samba Server日志文件的最大容量为1000KB
syslog = 0
不将日志信息写到syslog
panic action = /usr/share/samba/panic-action %d
当SAMBA崩溃时，执行某动作
security = share
用户访问Samba Server不需要提供用户名和口令
encrypt passwords = true
将认证密码加密
passdb backend = tdbsam
使用一个数据库文件来建立用户数据库
[share] 共享名
comment = share all 介绍
path = /home/samba 共享目录
browseable = yes 该共享可以浏览
public = yes 允许guest账户访问
writable = yes 可写
l 给出用各种方式传递文件的过程，并从易用性、速度、安全等方面做比较
sftp基于SSH协议，对文件进行加密，安全性最高；NFS，SAMBA基于TCP/IP协议，明文传输，安全性差；Xmodem同样是明文传输，安全性差。速度方面NFS最快，SAMBA其次，sftp因为加密缘故较慢，Xmodem最慢。
sftp，NFS，samba易用性都差不多，都有比较好的图形界面支持，Xmodem易用性差。
l 说明其他所做的扩展内容的情况
除了显示器外的其他可选的扩展内容：NFS， DHCP，SAMBA，交叉编译C++，PC上编译JAVA，IDE
五、讨论与心得
通过这次实验，掌握了PCduino开