Rockchip (EASY EAI) RV1126B Development (Compilation) Guide

Description of Development (Compilation) Method

This project is developed based on the EASY EAI Nano - TB (RK RV1126B) development board. Purchase link:

EASY EAI-Nano-TB RV1126B Development Board

1. Cross-Compilation (Recommended)

1.1 Advantages and Disadvantages

Advantages:

• Compilation is performed using an x86 architecture CPU, resulting in fast compilation speed.
• Source code editing is convenient, with support for various IDEs such as VS Code and Qt Creator in the development environment.

Disadvantages:

• The compilation environment requires installation and deployment.
• Program debugging and running operations are relatively less straightforward compared to local compilation.

1.2 Introduction to EASY-EAI Compilation Environment

The EASY-EAI compilation environment is an online compilation environment (with the development board online) independently developed by Guangzhou Lingmou Technology. It establishes a real-time synchronous mapping relationship between the PC terminal and the board terminal, ensuring that when cross-compiling on the PC terminal, it can be linked in real-time with the dependent libraries of the development board.

1.2.1 Installation and deployment methods

Compared with the traditional cross-compilation environment where the compilation toolchain is decompressed and system environment variables are configured, the EASY-EAI compilation environment features more convenient deployment and shields various compatibility issues. Detailed installation steps are provided in the article在《Getting Started Guide / Development Environment Preparation / Preparation and Update of Easy-Eai Compilation Environment》

1.2.2 Mounting the Embedded Device (Development Board)

First, enter the EASY-EAI compilation environment through the run.sh script:

Then, check the device's IP address via the serial port:

For specific operations of serial port debugging, refer to 《Getting Started Guide / Introduction to Development Board Debugging Methods / Serial Port Debugging》。

Return to the EASY-EAI compilation environment and try to ping the development board:

If the ping is successful, select an IP address (either eth0 or wlan0) and mount the root directory of the development board's rootfs to /mnt in the EASY-EAI compilation environment using the mount command as follows:

sudo mount -t nfs -o nolock 192.168.3.121:/ /mnt

Thus, any edits made to files in the /mnt directory of the EASY-EAI compilation environment will be automatically synchronized to the root directory of the development board's rootfs.

sudo load_rootfs 192.168.3.119

In addition, if you find typing the mount command cumbersome, you can use the pre-prepared mounting script load_rootfs:

1.3 Example of Regular Compilation Methods

【Baidu Netdisk】

Link: https://pan.baidu.com/s/13rdifPHyZwHFIvbvBC78jw?pwd=1234

Extraction code: 1234【Baidu Netdisk】Link: https://pan.baidu.com/s/13rdifPHyZwHFIvbvBC78jw?pwd=1234

Here are compilation examples of four regular compilation methods:

Each example includes a build.sh script and a source code file, as shown below.

We can enter any example, execute the ./build.sh operation, and a hello file will be generated.

Then, simply copy the generated file to any subdirectory of /mnt in the EASY-EAI compilation environment.

After accessing the board via serial port debugging, navigate to the location where the hello file was copied, as shown below:

cd /userdata/

Execute the ls command to check the directory, and you will find that the hello file has been synchronized:

ls

Run the hello file directly to see the result:

./hello

1.4 Description of Regular Compilation Methods

As indicated by the mapping relationship, the /mnt directory in the EASY-EAI compilation environment is the root directory of the development board. Since the dependent libraries of the cross-compilation tool are located on the development board, it is only necessary to specify the sysroot for the compiler as /mnt.

GCC/G++：

aarch64-linux-gnu-gcc --sysroot=/mnt hello_world.c -o hello
aarch64-linux-gnu-g++ --sysroot=/mnt hello_world.cpp -o hello

CMAKE：Include the following file in the CMakeList.txt file.

include ($ENV{HOME}/configs/cross.cmake)

QMAKE：The qmake tool is directly installed on the development board, so you can execute qmake directly in the EASY-EAI compilation environment. An example command is as follows:

/mnt/usr/bin/qmake xxxxxx.pro 
make

2. Local Compilation

2.1 Advantages and Disadvantages

Advantages:

• The development board can be used directly as a small computer, eliminating the need for cumbersome application deployment.

Disadvantages:

• Compilation is performed using the RV1126B CPU, which has relatively weak performance and slow compilation speed.
• Source code editing is difficult, with only the native vi editor available, and no support for various IDEs.

2.2 Usage Method

You can access the background of the development board using three methods: adb, debugging serial port, and ssh, then directly use the development board as a computer installed with the Ubuntu system.