Orange Pi Lite 2 is not just a consumer product, it is also designed for anyone who wants to use technology to create and innovate. It is a very simple, interesting and practical tool that you can use to build the world around you.<br>

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=== '''Hardware Features of Orange Pi Lite 2''' ===

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=== '''GPIO specifications''' ===

The following figure is the GPIO pin function diagram of Orange Pi Lite 2:

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| colspan=3| Orange Pi Lite 2 pin correspondence table

* TF card, minimum 8GB capacity, class 10, recommended brand TF card, such as SanDisk 16G TF card

* For a compiling host, the configuration should preferably meet the following conditions:

64bit CPU；<br>

8 GB memory and above<br>

</p>

The operating system is best:

'''Ubuntu14.04 (for compiling Android)'''<br>

'''Ubuntu18.04 (for compiling Linux source code)'''

The above software can be obtained through Github, Mega network disk and Baidu cloud disk.

</p>

lichee/bootloader/uboot_2014_sunxi_spl&nbsp;&nbsp;&nbsp;#boot0 Code directory<br>

lichee/linux-3.10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#Kernel code<br>

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Welcome to mkscript setup progress<br>

All available chips:<br>

# sun50iw1p1

# sun50iw2p1

Choice: 2<br>

All available platforms:

# android

# dragonboard

Choice: 0<br>

All available business:

# 5.1

# 4.4

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== '''Linux compilation environment setup''' ==

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Enter the root password and press enter

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Select 0 Build system with uboot / kernel / rootfs / image to enter the interface of development board model selection.

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Select orange pi lite2, enter the kernel version selection interface after entering<br>

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At present, the orangepi lite2 development board supports the kernel code of '''Linux 4.9 and mainline.''' Select one of them and press Enter to start downloading the corresponding SDK source code.<br>

The downloaded source code will be stored in the same directory of OrangePi_Build<br>

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<div style="border:1px solid #dddddd;background:#f1f1f1;padding:5px;">

$ ls ../OrangePi_Build -l OrangePi_Build<br>

'''OrangePiH6_mainline''' (The current kernel version is Linux5.3.5)</p>

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If GitHub fails to download the code, you can download the source code compression package of Linux SDK directly from Baidu Cloud Disk.<br>

Download link is:

=== '''Build a compilation environment''' ===

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├── scripts&nbsp;&nbsp;&nbsp;&nbsp;Script files used during compilation<br>

├── toolchain&nbsp;&nbsp;&nbsp;&nbsp;Cross-compilation toolchain used by the kernel and u-boot<br>

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=== '''Compile Linux and U-boot source code''' ===

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Select OrangePi lite2 and press Enter

The functions of each option are as follows:<br>

<div style="font-weight:700">

* 7 Update Uboot —— Update boot0 and u-boot and dtb configuration of SD card Linux system

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The final file generated by the compilation will be saved in the output directory<br>

<div style="background:#f1f1f1;border:1px solid #ddd;padding:5px;">

'''(3)Select Realtek 8812A USB WiFi in the kernel configuration and compile it into a kernel module'''

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'''(4)Recompile the kernel according to the method in `` Compiling Linux and U-boot Source '''''

Partially compiled log looks like this:

<div style="border:1px solid #dddddd;background:#f1f1f1;padding:5px;">

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Then choose 6 Update Module to update the kernel module according to the instructions in the section `` Compiling Linux and U-boot Source ''

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Next, you can start the system through the SD card and use the new 8812au.ko kernel module to drive the USB WIFI network card.

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Check whether the inserted TF card is consistent with the selected drive letter, click the "Restore Card" button to start formatting the TF

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'''(2)Then select firmware, select boot card.'''

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'''(3)Click "Burn Card" to start writing to the TF card and wait for the burning to complete.'''

After the Android firmware is successfully programmed, click the "Close" button, and then you can insert the TF card into the development board to start the system

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=== '''How to flash Linux firmware through Etcher''' ===

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=== '''Linux boot light description''' ===

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=== '''Login account and password''' ===

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=== '''extend rootfs partition''' ===

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<div style="border:1px solid #dddddd;background:#f1f1f1;padding:5px;">

<div style="font-weight:700;">

</tr>

<tr style="font-weight:700;">

<td>1.1G</td>

<td>/</td>

</tr>

<tr>

<td>devtmpfs</td>

<td>0</td>

<td>0%</td>

<td>/dev</td>

<tr>

<td>tmpfs </td>

<td>0</td>

<td>0%</td>

<td>/dev/shm</td>

<tr>

<td>tmpfs </td>

<td>/run</td>

</tr>

<tr>

<td>tmpfs</td>

<td>0</td>

<td>0%</td>

<td>/sys/fs/cgroup</td>

<td>/dev/mmcblk1p1</td>

<td>50M</td>

<td>/boot</td>

</tr>

</table>

<br>

<div style="font-weight:700;">

</tr>

<tr style="font-weight:700;">

<td>/</td>

</tr>

<tr>

<td>devtmpfs</td>

<td>0</td>

<td>0%</td>

<td>/dev</td>

<tr>

<td>tmpfs </td>

<td>0</td>

<td>0%</td>

<td>/dev/shm</td>

<tr>

<td>tmpfs </td>

<td>/run</td>

</tr>

<tr>

<td>tmpfs</td>

<td>0</td>

<td>0%</td>

<td>/sys/fs/cgroup</td>

<td>/dev/mmcblk1p1</td>

<td>50M</td>

<td>/boot</td>

</tr>

</table>

=== '''Recording playback test method''' ===

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<div style="border:1px solid #dddddd;background:#f1f1f1;padding:5px;">

WAVE 'Test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,<br>

　Stereo<br>

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<div style="border:1px solid #dddddd;background:#f1f1f1;padding:5px;">

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=== '''WIFI configuration method''' ===

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</div>

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== '''Introduction to serial debugging tools''' ==

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First you need to prepare a USB to TTL serial cable similar to the picture below:<br>

* Green-RX

* White-TX

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=== '''Use on Windows platform''' ===

In the process of using OrangePi for project development, in order to obtain more debugging information, OrangePi supports serial port information debugging by default. For developers, they only need to prepare the materials mentioned above to get serial debugging information. The serial debugging tools used by different host computers are similar. Basically, you can refer to the methods below to deploy. There are many tools for serial debugging on the Windows platform. The commonly used tool is putty. This section uses putty as an example to explain deployment.<br>

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Download the latest driver PL2303_Prolific_DriverInstaller_v130.zip, download and unzip.<br>

Select application installation as administrator<br>

Wait for the installation to complete

Putty can be downloaded from the following address, please choose the version suitable for your development environment.<br>

https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html

<p>Double-click the downloaded putty.exe directly to open putty. The software interface

is shown in the figure below.</p>

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　In Windows 7, we can check whether the serial port connection is normal and the device number of the serial port through the device manager. If the device is not recognized properly, please check if the driver is successfully installed. If there is a problem with the driver installation, you can try to scan and install the driver using 360 Driver Master.

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　Set the serial port to the corresponding port number (COM4), disable flow control, and set the speed to 115200

OrangePi is powered on and putty will automatically print serial port log information<br>

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=== '''Use on Linux platform''' ===

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There is not much difference between using putty on the Linux platform and the Windows platform. The following mainly describes the operation steps where there are differences. All operations are based on Ubuntu 14.04 system.<br>

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<div style="background:#f1f1f1;border:1px solid #ddd;padding:5px;">

$ sudo apt-get install putty<br>

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The serial number can be viewed through ls / dev / ttyUSB *<br>

Baud rate needs to be set to 115200<br>

And turn off flow control

== '''History''' ==

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