UP board正在舉辦『2016 UP Board Virtual Hackathon』黑客松活動，只要手上有UP Board的朋友都可以參加，歡迎您將創意產品，藉由這場線上比賽分享給全世界，同時又有獎金可拿，耶。
報名網址：這裡。
參賽條件：握有UP board即可。
參賽產品：採用UP board的原創產品或專題實作。
參賽方式：將作品細節上傳至UP board官網，只會秀出您的作品主旨及參賽者大名。
獎金：從中選出最精采的5名優勝者，將獲合計超過台幣四萬元的高額獎金哦。
照著RPi.GPIO - UpWiki的範例，運用RPi.GPIO模組、撰寫Python程式來控制UP board的GPIO腳位。
UP board的腳位功能圖，其中Pin欄是板子的實體針腳編號，UP pinout則是UP板子SoC的腳位編號，Linux GPIO是Raspberry Pi板子的SoC腳位編號。底下範例一律使用Pin欄的編號。
我的環境是UP board、Ubilinux（ubilinux-3.0.iso），自行編譯OpenCV（Open Source Computer Vision Library），我抓的版本是3.1.0。
先更新套件清單並升級：
$ sudo apt-get update
$ sudo apt-get dist-upgrade -y
若是直接安裝現成的套件，指令如下：
$ sudo apt-get install libopencv-dev
不過得到的OpenCV版本通常過舊，因此自行下載原始碼，手動建置編譯。從OpenCV官方的安裝步驟，得知需要先安裝一堆相依套件。
建置與編譯所需工具：
$ sudo apt-get install build-essential gcc cmake pkg-config
抓原始檔需要的工具：
$ sudo apt-get install git
Python相關：
$ sudo apt-get install python python-dev python-numpy
圖形視窗程式庫：
$ sudo apt-get install libgtk2.0-dev
音訊視訊的編解碼、錄製、轉換、串流：
$ sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev
圖檔格式（選用性）：
$ sudo apt-get install libjpeg-dev libpng-dev libtiff-dev libjasper-dev
IEEE 1394相機介面（選用性）：
$ sudo apt-get install libdc1394-22-dev
TBB（Intel's Threading Building Blocks）（選用性）：
$ sudo apt-get install libtbb2 libtbb-dev
接著是OpenCV，原始碼檔案約580 MB，建置後需要2.6 GB，請先確認儲存空間是否足夠。
以git下載位於GitHub的OpenCV原始碼，得到目錄opencv，切換進去：
$ git clone https://github.com/Itseez/opencv.git
$ cd opencv
目前處於最新的版本分支，到OpenCV官網查詢後，得知目前釋出的正式版本為3.1.0，所以決定切換到該分支：
$ git checkout 3.1.0
新增目錄build存放建置結果，切換進去：
$ mkdir build
$ cd build
先執行cmake產生建置需要的設定檔：
$ cmake -DWITH_TBB:BOOL=TRUE -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local ..
其中「-DWITH_TBB:BOOL=TRUE「代表我們想要使用TBB，「-D CMAKE_INSTALL_PREFIX=/usr/local」代表之後要安裝的路徑，最後的「..」代表原始碼所在路徑。
然後開始建置：
$ make -j4
因為UP board的CPU有4顆核心，所以可下參數「-j4」充分利用，相當快，花了不到一小時。
最後終於出現完成的訊息：
...
[100%] Building CXX object modules/calib3d/CMakeFiles/opencv_test_calib3d.dir/test/test_main.cpp.o
Linking CXX executable ../../bin/opencv_traincascade
[100%] Built target opencv_traincascade
Linking CXX executable ../../bin/opencv_test_calib3d
[100%] Built target opencv_test_calib3d
Linking CXX shared module ../../lib/cv2.so
[100%] Built target opencv_python2
然後安裝：
$ sudo make install
執行指令更新程式庫：
$ sudo ldconfig
試著檢查OpenCV的版本：
$ pkg-config --modversion opencv
3.1.0
耶！
然後是是撰寫C++程式，顯示一張圖檔。新增檔案test.cpp，準備一張圖檔test.png，程式內容如下：
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc, char **argv)
{
Mat image = imread("test.jpg", CV_LOAD_IMAGE_COLOR);
namedWindow("test", WINDOW_AUTOSIZE);
imshow("test", image);
waitKey(0);
return 0;
}
以底下兩道指令之一進行編譯：
$ g++ -lopencv_core -lopencv_highgui -lopencv_imgcodecs test.cpp
$ g++ `pkg-config --libs opencv` test.cpp
執行：
$ ./a.out
啊哈，成功囉。
UP board的音訊輸出，除了HDMI與I2S，應該就剩下加裝USB音效卡。PS：但我不是100%確定。
嗯，怎麼辦呢，雖然我有HDMI螢幕，但沒有兩端都是HDMI的線材；還是要用能把HDMI轉成RGB D-sub與3.5mm耳機孔的轉接器呢？至於I2S，目前似乎尚未支援。
想起以前為Raspberry Pi買了一張USB音效卡，用了一陣子，後來就積灰塵，現在終於可以重見天日。
UP board在HDMI插槽旁邊，有個USB 3.0 Micro埠，根據此處文件，可以改為序列埠。
PS：另外還有兩個地方提供序列埠。
準備一條USB線， 一頭A公，插電腦，一頭Micro公，插UP board。我這條是2.0的線。
安裝好Linux系統（Ubilinux），之前都是插RJ-45網路線，現在讓我們來嘗試使用USB無線網卡吧。
我的網卡是這個：Edimax EW-7811Un 150Mbps Wireless 隱形USB無線網卡，其晶片是RTL8188CUS。
插入後，Linux應可自動辨識，並且自動載入驅動程式。
$ lsusb
Bus 001 Device 005: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]
但是下達指令ifconfig的話，並未出現網路介面wlan0，需要自己設定網路組態。
安裝相關設定套件：
$ sudo apt-get install wpasupplicant wireless-tools
修改檔案/etc/network/interfaces，新增部分以紅色標示。
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp
allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp
然後，新增∕修改/etc/wpa_supplicant/wpa_supplicant.conf，內容如下，請根據你自己的網路組態做修改：
ctrl_interface=/run/wpa_supplicant
update_config=1
network={
ssid="你的無線網路名稱"
psk="密碼"
proto=RSN
key_mgmt=WPA-PSK
pairwise=CCMP
auth_alg=OPEN
}
然後下指令，關閉∕啟動無線網路介面，或者重新開機：
$ sudo ifdown wlan0
$ sudo ifup wlan0
接著，應該就沒問題了。
$ sudo ifconfig
wlan0 Link encap:Ethernet HWaddr 80:1f:02:e2:93:2f
inet addr:192.168.1.41 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::821f:2ff:fee2:932f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:621 errors:0 dropped:0 overruns:0 frame:0
TX packets:409 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:71162 (69.4 KiB) TX bytes:73832 (72.1 KiB)
耶！
安裝好Linux系統（Ubilinux），讓我們來嘗試播放mp3音檔與mp4影片檔吧。
首先把一些mp3與mp4檔傳輸到UP board裡。Ubilinux預設已安裝SSH相關套件，所以可使用WinSCP來傳輸檔案。
然後開啟預設已安裝的VLC，
安裝好Linux系統（Ubilinux）之後，簡單試用一些查詢系統狀態的Linux指令吧。
首先，看看Linux核心版本吧。
$ uname -a
Linux ubilinux 4.4.0-ubi3-amd64 #1 SMP Debian 4.4.13-1 (2016-06-17) x86_64 GNU/Linux
$ cat /proc/version
Linux version 4.4.0-ubi3-amd64 (ubilinux@emutex.com) (gcc version 4.9.2 (Debian 4.9.2-10) ) #1 SMP Debian 4.4.13-1 (2016-06-17)
哦，4.4啊，跟官方說的一樣。
接著，查詢UP board的BIOS版本，
$ cat /sys/devices/virtual/dmi/id/bios_version
UPC1BM0S
看來是目前最新的，以後有機會的話，再嘗試更新囉。順帶一提，若要重置BIOS設定值，可拔掉RTC電池，等待10~15分鐘後再裝回去。
然後，查詢UP board板子本身的版本，
$ cat /sys/devices/virtual/dmi/id/board_version
V0.4
嗯，不知道代表什麼意義。
看看有多少記憶體：
$ free -h
total used free shared buffers cached
Mem: 3.3G 516M 2.8G 44M 21M 284M
-/+ buffers/cache: 209M 3.1G
Swap: 0B 0B 0B
嗯，總共應該有4 G才對，其他的，應該是分給GPU繪圖處理器了，可到BIOS調整；除此之外，也有些許部分被BIOS保留作為其他用途。
查詢儲存媒體eMMC的用量：
$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 10M 0 10M 0% /dev
tmpfs 673M 8.9M 664M 2% /run
/dev/mmcblk0p3 29G 2.5G 25G 9% /
tmpfs 1.7G 0 1.7G 0% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 1.7G 0 1.7G 0% /sys/fs/cgroup
/dev/mmcblk0p2 48M 119K 48M 1% /boot/efi
tmpfs 337M 4.0K 337M 1% /run/user/110
tmpfs 337M 4.0K 337M 1% /run/user/1000
嗯， 看來我手上這塊板子內建32 GB地eMMC。
查看網路卡取得的IP。我的UP board位於路由器之後，會從DHCP自動取得IP位址。
$ sudo ifconfig
eth0 Link encap:Ethernet HWaddr 00:07:32:3d:2d:7d
inet addr:192.168.1.71 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::207:32ff:fe3d:2d7d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1019 errors:0 dropped:0 overruns:0 frame:0
TX packets:1094 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:206884 (202.0 KiB) TX bytes:138338 (135.0 KiB)
Ubilinux源自Debian，通樣採用DEB/APT套件管理系統，讓我們更新套件清單，並且升級原已安裝的套件吧，指令如下：
$ sudo apt-get update
$ sudo apt-get dist-upgrade
...省略輸出...
試試安裝新套件吧，例如可查詢CPU狀態的cpufrequtils：
$ sudo apt-get install cpufrequtils
然後執行指令cpufreq-info：
$ cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 480 MHz - 1.92 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 480 MHz and 1.92 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 940 MHz.
analyzing CPU 1:
driver: intel_pstate
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 0.97 ms.
hardware limits: 480 MHz - 1.92 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 480 MHz and 1.92 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 1.20 GHz.
analyzing CPU 2:
driver: intel_pstate
CPUs which run at the same hardware frequency: 2
CPUs which need to have their frequency coordinated by software: 2
maximum transition latency: 0.97 ms.
hardware limits: 480 MHz - 1.92 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 480 MHz and 1.92 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 1.68 GHz.
analyzing CPU 3:
driver: intel_pstate
CPUs which run at the same hardware frequency: 3
CPUs which need to have their frequency coordinated by software: 3
maximum transition latency: 0.97 ms.
hardware limits: 480 MHz - 1.92 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 480 MHz and 1.92 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 1.68 GHz.
可看到有4個CPU核心，時脈為480 MHz到1.92 GH，動態調整。
嗯，那麼CPU溫度呢，先安裝套件Linux Monitoring Sensors：
$ sudo apt-get install lm-sensors
然後，執行指令sensors-detect設定該載入那些模組，如果不知道的話，最好通通使用預設值，直接按Enter就對了：
$ sudo sensors-detect
# sensors-detect revision 6209 (2014-01-14 22:51:58 +0100)
# System: AAEON UP-CHT01 [V1.0]
This program will help you determine which kernel modules you need
to load to use lm_sensors most effectively. It is generally safe
and recommended to accept the default answers to all questions,
unless you know what you're doing.
Some south bridges, CPUs or memory controllers contain embedded sensors.
Do you want to scan for them? This is totally safe. (YES/no):
Module cpuid loaded successfully.
Silicon Integrated Systems SIS5595... No
VIA VT82C686 Integrated Sensors... No
VIA VT8231 Integrated Sensors... No
AMD K8 thermal sensors... No
AMD Family 10h thermal sensors... No
AMD Family 11h thermal sensors... No
AMD Family 12h and 14h thermal sensors... No
AMD Family 15h thermal sensors... No
AMD Family 15h power sensors... No
AMD Family 16h power sensors... No
Intel digital thermal sensor... Success!
(driver `coretemp')
Intel AMB FB-DIMM thermal sensor... No
VIA C7 thermal sensor... No
VIA Nano thermal sensor... No
Some Super I/O chips contain embedded sensors. We have to write to
standard I/O ports to probe them. This is usually safe.
Do you want to scan for Super I/O sensors? (YES/no):
...省略...
Now follows a summary of the probes I have just done.
Just press ENTER to continue:
Driver `coretemp':
* Chip `Intel digital thermal sensor' (confidence: 9)
Driver `to-be-written':
* ISA bus, address 0xca0
Chip `IPMI BMC KCS' (confidence: 4)
* ISA bus, address 0xca8
Chip `IPMI BMC SMIC' (confidence: 4)
Note: there is no driver for IPMI BMC KCS yet.
Check http://www.lm-sensors.org/wiki/Devices for updates.
To load everything that is needed, add this to /etc/modules:
#----cut here----
# Chip drivers
coretemp
#----cut here----
If you have some drivers built into your kernel, the list above will
contain too many modules. Skip the appropriate ones!
Do you want to add these lines automatically to /etc/modules? (yes/NO)
Unloading cpuid... OK
然後執行指令sensors觀看：
$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +0.0°C (crit = +90.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +37.0°C (high = +90.0°C, crit = +90.0°C)
Core 1: +36.0°C (high = +90.0°C, crit = +90.0°C)
Core 2: +40.0°C (high = +90.0°C, crit = +90.0°C)
Core 3: +36.0°C (high = +90.0°C, crit = +90.0°C)
哎呀，好煩，上批踢踢跟網友鄉民大戰吧，咦，怎麼出現亂碼？
$ telnet ptt.cc
承蒙研揚科技公司好意，贈送一塊UP board。上一篇開箱拍拍照，介紹硬體規格，這一篇要開始安裝軟體囉。
概略步驟如下：
