Rk3568 development board evaluation (II): development environment construction

author ：ouxiaolong

development environment ——

host ：Ubuntu18.04

Development board ： Feiling embedded OK3568-C Development board

Windows There are a lot of virtual machine software , At present, there are VMware and VirtualBox.VMware It is divided into charging Professional Edition Workstation Pro And non-commercial Free Edition Workstation Player, Recommended Workstation Player.

The compiler host used by the author here Ubuntu18.04, About Workstation and Ubuntu The installation author will not repeat here , There's a lot of information online , By default, the author has installed Workstation and Ubuntu.

01 Dependency library installation

1.1 Update the source list of the host

$sudo apt-get update

1.2 Install dependent tools

$sudo apt-get install repo git ssh make gcc libssl-devliblz4-toolexpect g++ patchelf chrpath gawk texinfo chrpathdIFfstatbinfmt-supportqemu-user-static live-build bison flex fakeroot cmakegcc-multilibg++-multilib unzip device-tree-compiler python-piplibncurses5-devbuild-essential vim tree

02TFTP Service environment construction and testing

TFTP Simple file transfer protocol , It's based on UDP Protocol a protocol implemented for simple file transfer between client and server , Suitable for low cost 、 Uncomplicated applications .

TFTP The protocol is specially designed for small file transfer , You can only get files from the server , Or write a file to the server , Can't list the contents , It can't be certified .

（1） Download and install tftp

$sudo apt-get install openbsd-inetd

（2） newly build tftp Directory and change its properties

$sudo mkdir /tftpboot

（3） modify /etc/inetd.conf file

$sudo vim /etc/inetd.conf

Add the following :

tftpdgram udp wait nobody /usr/sbin/tcpd/usr/sbin/in.tftpd /tftpboot

（4） start-up tftp

$sudo /etc/init.d/openbsd-inetd start

（5） Local testing

stay /tftpboot/ Create a new file in the directory test, Input content 、 preservation . Then open another terminal , Test file transfer .

– Enter the command tftp127.0.0.1

– Input gettest

– Input q You can quit

– after , Use ls Command can find that there is..., in the current directory test file , If the file and the server test The file is as like as two peas. , Indicates that the server is successfully set up .

（6） Development board testing

Development board download test

#tftp-g -l test -r test +IP Address

（ notes ：-l The file after downloading is the file name , You can customize ;-r Next is the file name of the server ）

03 Install and configure the cross compilation tool chain

stay Linaro There are many kinds on the official website GCC Cross compile toolchain , Because of what we use RK3568 The development board is a Cortex-A55 kernel 64 Bit development board , choice aarch64-linux-gnu.

Address ：https://releases.linaro.org/components/toolchain/binaries/latest-7/aarch64-linux-gnu/

There are many cross compilers in the diagram , We just need to focus on these two :

in the light of 32 Bit system gcc-linaro-7.5.0-2019.12-i686_aarch64-linux-gnu.tar.xz And for 64 Bit system gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz.

According to what you use Ubuntu Select the appropriate version for the system type , For example, I installed Ubuntu14.04 yes 64 Bit system , So I'm going to use gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz.

04 Cross compiler installation

Copy the cross compiler Ubuntu Medium /opt Under the table of contents ( No, opt Then create a new directory ), Do the following ：

1. decompression gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar

Use the following command

$sudotar -xvf gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar //

Must use super user mode .

2. edit ~/.bashrc file

$vi ~/.bashrc

Add a line at the end of the file

exportPATH=$PATH:/opt/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu/bin

Save and exit .

3. function source~/.bashrc Let the document take effect

$source ~/.bashrc

05 Cross compiler verification

Method 1 ：

Type... On the command line aarch64-l Then press tab Key to see if it will automatically complete

Method 2 ：

Input ：aarch64-linux-gnu-gcc-v

The above figure shows that the configuration is successful ！

It can be seen from the figure that the version number of the current cross compiler is 7.5.0, It indicates that the cross compilation tool chain is successfully installed （ notes ： The cross compiler version installed by the editor is 7.5.0,OK3568-C The source code package of the development board is 9.3.0 edition ）.

The command used when using the newly installed cross compiler is ：

aarch64-linux-gnu-gcc

The specific meaning of this command is as follows ：

1.aarch64 Indicates that this is a compilation aarch64 Compiler for architecture code .AArch64 yes ARMv8 An execution state of an architecture .

2.linux Indicates running on linux In the environment .

3.gnu Tabular embedded binary interface .

4.gcc Said is gcc Tools .

The best verification method is to compile a routine directly , Let's compile the first bare metal routine “hello.c” try .

$vim hello.c

Use the following command to view hello file information ：

$file hello

As you can see from the diagram hello yes 64 position LSB Of ELF Format file , The target machine architecture is ARMaarch64,, It shows that our cross compiler works normally .

Finally, download the program to the development board , After modifying user permissions, you can run .

It is worth noting that , stay RK3568 There is a cross compilation chain in the source code of , It's just that the version is older , In source prebuilts Under the table of contents . The author configures the tool chain mainly for application development .