Learn ZYNQ (8)

在zed的PS端运行spark（已成功）：

（1）设置uboot为sd卡启动rootfs：

"sdboot=if mmcinfo; then "
                        "run uenvboot; "
                        "echo Copying Linux from SD to RAM... && "
                        "fatload mmc 0 0x3000000 ${kernel_image} && "
                        "fatload mmc 0 0x2A00000 ${devicetree_image} && "
                        "bootm 0x3000000 - 0x2A00000; "
                "fi"

如果想从zImage启动，修改 include/configs/zynq_common.h 的sdboot 内容：

        "sdboot=echo (modified) Copying Linux from SD to RAM... && "

                "mmcinfo && "

                "fatload mmc 0 0x8000 zImage && "

                "fatload mmc 0 0x2A00000 ${devicetree_image} && "

                "bootz 0x8000 - 0x2A00000"

（2）devicetree.dts修改启动参数：

bootargs = "console=ttyPS0,115200 root=/dev/mmcblk0p2 rw earlyprintk rootfstype=ext4 rootwait devtmpfs.mount=0";

参考网站http://www.wiki.xilinx.com/Ubuntu+on+Zynq

（3）下载Uboot的rootfs镜像：

http://www.wiki.xilinx.com/file/view/zynq-ubuntu-core-12.10-core-armhf-rootfs.tar.xz/423293908/zynq-ubuntu-core-12.10-core-armhf-rootfs.tar.xz

（4）配置ip地址：

vi /etc/network/interfaces

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp

设置网络地址生效：

/etc/init.d/networking restart

自动获取ip地址

dhclient eth0

（5）安装Java

/* wrong 1

apt-get install python-software-properties

遇到add-apt-repository: command not found的错误请参考以下链接。

（http://www.thelinuxguy.nl/how-tos/how-to-fix-sudo-add-apt-repository-command-not-found-linux/）

apt-get install software-properties-common

add-apt-repository ppa:webupd8team/java 

apt-get update

apt-get install oracle-java7-installer

*/

/* wrong 2 此方法在后面sbt/sbt assembly会出错

apt-cache search jdk

apt-get install openjdk-7-jdk 

vi ~/.bashrc

JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-armhf/
JRE_HOME=${JAVA_HOME}/jre
export ANDROID_JAVA_HOME=$JAVA_HOME
export CLASSPATH=.:${JAVA_HOME}/lib:$JRE_HOME/lib:$CLASSPATH
export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin
export JAVA_HOME;
export JRE_HOME;
export CLASSPATH;
HOME_BIN=~/bin/
export PATH=${PATH}:${JAVA_PATH}:${HOME_BIN};

*/

方法2：下载jdkforarm

http://www.oracle.com/technetwork/java/javase/downloads/jdk7-arm-downloads-2187468.html

如果需要下载以前的版本：

http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html

JAVA_HOME=/root/jdk1.7.0_60

export PATH=${JAVA_HOME}/bin:$PATH

(6)安装hadoop:

wget http://mirror.nus.edu.sg/apache/hadoop/common/hadoop-2.4.0/hadoop-2.4.0.tar.gz

tar zxvf hadoop-2.4.0.tar.gz

export PATH=/root/hadoop-2.4.0/bin:$PATH

(7)安装Scala

wget http://www.scala-lang.org/files/archive/scala-2.9.3.tgz

tar zxvf scala-2.10.4.tgz

mv scala-2.10.4 /usr/share/scala

ln -s /usr/share/scala/bin/scala /usr/bin/scala

ln -s /usr/share/scala/bin/scalac /usr/bin/scalac

ln -s /usr/share/scala/bin/fsc /usr/bin/fsc

(8)安装Spark

wget http://d3kbcqa49mib13.cloudfront.net/spark-0.9.1-bin-hadoop2.tgz

tar zxvf spark-0.9.1-bin-hadoop2.tgz

cd spark-0.9.1-bin-hadoop2

sbt/sbt assembly

(注意这条命令后面不能有一杠，注意墙）

（这条命令如果失败似乎问题不大）

(9)测试

examples：http://spark.apache.org/examples.html

from random import random
def sample(p):
    x, y = random(), random()
    return 1 if x*x + y*y < 1 else 0

count = sc.parallelize(xrange(0, 1000)).map(sample)
             .reduce(lambda a, b: a + b)
print "Pi is roughly %f" % (4.0 * count / 1000)

如果开发板处于广域网，而且没有配置localhost机器名， 则会遇到此错误

拔掉网线再测试：

配置机器名字：

成功启动界面：

成功测试界面：