Morred's blog

2015年5月5日

Ubuntu Wi-Fi Networking setting

Ubuntu Wi-Fi Networking Setting

/etc/network/interfaces

Reference:http://elinux.org/BeagleBoardUbuntu

2015年5月4日

Raspberry Pi 2 規格介紹

Raspberry Pi 2 規格介紹

http://www.raspberrypi.com.tw/3964/raspberry-pi-2-model-b/

https://learn.adafruit.com/introducing-the-raspberry-pi-2-model-b?view=all

Install an SSH server for remote access:

$ sudo apt-get install openssh-server

修改相關設定

SSH預設port為22，使用預設值容易受攻擊，建議修改

sudo nano /etc/ssh/sshd_config

@# What ports, IPs and protocols we listen for (約第4、5行)
Port 22

將紅字部分修改為自己設定的port

存檔後，重新啟動Pi後完成修改

使用PuTTY連線

相關設定如上

Host Name(192.168.1.123)修改為RaspberryPi的IP

Port(1234)則使用剛剛自己設定的port

Reference：

http://blog.udn.com/nigerchen/2262865

https://wiki.ubuntu.com/ARM/RaspberryPi

Raspberry Pi2 Cross-compiler環境

Raspberry Pi2 Cross-compiler環境

http://blog.ittraining.com.tw/2015/02/raspberry-pi2-kernel.html#more

http://blog.xuite.net/zack_pan/blog/73179035-%E5%BB%BA%E6%A7%8BRaspberry+Pi+with+Arch+Linux+ARM

NTP

https://help.ubuntu.com/community/UbuntuTime

http://kirby86a.pixnet.net/blog/post/94619666-%E5%AE%89%E8%A3%9Dntp%E6%9C%8D%E5%8B%99

$sudo apt-get install ntp

setting->time&date

2015年5月2日

BBB make ARCH=arm menuconfig error

make[1]: *** [scripts/kconfig/mconf] Error 1

make: *** [menuconfig] Error 2

缺少lib

解决方法如下：

sudo apt-get install build-essential

sudo apt-get install libncurses5

apt-get install libncurses5-dev

安裝完即可進行

Reference：http://blog.csdn.net/incanus/article/details/7999232

2015年4月24日

Raspberry Pi 2 Model B note

Raspberry Pi 2 Model B note

RaspberryPi2 Ubuntu 14.04 LTS

下載.img檔案

Windows 環境利用SDFormatter將MicroSD格式化後，使用Win32DiskImager燒到MicroSD卡上

Raspberry Pi 2 Model B Serial Console

Reference：
https://wiki.ubuntu.com/ARM/RaspberryPi

http://yehnan.blogspot.tw/2013/09/raspberry-pi.html

http://www.raspberrypi.com.tw/1999/connect-to-raspberry-pi-via-serial/

http://elinux.org/R-Pi_configuration_file

https://www.kernel.org/doc/Documentation/kernel-parameters.txt

2015年4月21日

Beaglebone Black serial console

Beaglebone Black serial console

USB->TTL(FTDI FT232RL)

http://goods.ruten.com.tw/item/show?21106121243474

Driver:http://www.ftdichip.com/Drivers/CDM/CDM%20v2.10.00%20WHQL%20Certified.zip

(http://www.ftdichip.com/Drivers/VCP.htm)

Gnd->J1

RX->Pin4

TX->Pin5

But for me

Gnd->J1

RX->Pin5

TX->Pin4

Maybe TTL mark is wrong

Putty setting

Reference:http://dave.cheney.net/2013/09/22/two-point-five-ways-to-access-the-serial-console-on-your-beaglebone-black

Debian 設定

[Debian]修改時區及設定時間

dpkg-reconfigure tzdata

Asia->Taipei

ntpdate time.stdtime.gov.tw

Reference:http://blog.johnsonlu.org/linuxdebian-%E4%BF%AE%E6%94%B9%E6%99%82%E5%8D%80/

Beaglebone Black Flash Recommended Debian Images(BeagleBoard.org)

1.Download image file from BeagleBoard.org

http://beagleboard.org/latest-images

2.Unzip and using Win32 Disk Imager to write image to MicroSD

3.In /boot/uEnv.txt:

##enable BBB: eMMC Flasher:

#cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

Chang to:(remove the #)

##enable BBB: eMMC Flasher:

cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

In linux you must has root permission

sudo gedit /(your path)/boot/uEnv.txt

4.Put the MicroSD to the Beaglebone Black, hold down the S2 button and apply power.After the LED all on , you can release S2 button, and the program start erasing the flash.

5.When flash was finished, the Beaglebone Bleack will turn off. Take your MicroSD off and apply power again.

Reference:http://elinux.org/Beagleboard:BeagleBoneBlack_Debian

http://beagleboard.org/getting-started#update