Problem with setting up SDK and cross-compiler under Windows 11 and Ubuntu 22.04.3.

which steps have which errors ？

This may be a difficult process. You need to solve each problem individually.

First of all, thank you very much for answering my question.

1)Am I right in understanding that the Luckfox Pico Pro Max board is not capable of compiling the program itself? That's why I need another computer with Ubuntu LTS 22.04 installed on which I need to run SDK Environment Deployment? After installing the system on the PC, do I need to perform SDK Environment Deployment(on the PC)? I performed step 1.1 and on step 1.2 SDK Directory Structure I encountered the first problems, what else do I need to do to get started development?

2) I skipped the further steps of point 1 and tried to compile the project on a PC using Cross-Compilation. The first thing I tried to do was open the file vi ~/.bashrc , in it I did not find the PATH variable to specify the path to the cross-compilation tool, so I moved the cursor to the end of the file bashrc and tried to add the line export PATH=<SDK Directory>/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin:$PATH, replacing <SDK Directory> with my path according to the PC dirrectory/ but I can't make changes to the file.

When running the command arm-rockchip830-linux-uclibcgnueabihf-gcc gpio.c -o gpio I get an error arm-rockchip830-linux-uclibcgnueabihf-gcc: command not found.

Answering these questions will help me begin to understand the structure of my Luckfox Pico Pro Max board, so thank you very much for Your help!

It seems you are encountering a few issues while setting up the SDK and cross-compiler for your Luckfox Pico Pro Max board. I'll try to guide you step by step.

### 1) Understanding the Board and SDK Setup

You are correct in assuming that the Luckfox Pico Pro Max board does not have the capability to compile programs on its own. Instead, you need to use another computer (in your case, Windows 11 with Ubuntu 22.04.3 installed) to perform the SDK environment deployment. Here's a general outline of the process:

#### Steps for SDK Environment Deployment:

1. **Install Ubuntu or use WSL (Windows Subsystem for Linux)**: You are using Ubuntu 22.04.3, which is fine. If you're using WSL, make sure it's the latest version.

2. **Install dependencies**: You need to ensure the necessary dependencies are installed on Ubuntu for compiling and cross-compiling. You can do this by running:

   sudo apt update
   sudo apt install build-essential gcc-arm-none-eabi cmake libstdc++-arm-none-eabi-newlib

3. **Clone the SDK Repository**: If your SDK requires cloning from GitHub or another repository, you should follow the instructions for downloading the SDK.

#### Addressing the Problems:

1. **SDK Directory Structure Errors**: If you are stuck on this step, double-check the SDK structure provided in the manual. Make sure all necessary directories (such as `tools`, `src`, etc.) are in place.

2. **Cross-Compilation PATH setup**:

  When adding the path to your `~/.bashrc` file, you're right to place it at the end of the file. Here’s what to do:

  - Open `~/.bashrc`:

     nano ~/.bashrc

  - Add the following line at the end (replace `<SDK Directory>` with the correct path to your SDK's toolchain):

     export PATH=<SDK Directory>/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin:$PATH

  - Save the file (`Ctrl+X`, then `Y`, and press Enter).

  - Apply the changes by running:

     source ~/.bashrc

3. **Cross-Compiler Not Found Issue**:

  - If running the command `arm-rockchip830-linux-uclibcgnueabihf-gcc gpio.c -o gpio` results in a "command not found" error, it means the cross-compiler is not in your system's PATH. Make sure:

    - The path to the cross-compiler in your `~/.bashrc` is correct.

    - The cross-compiler is actually present in that directory.

    - After updating the `PATH`, verify that the cross-compiler is in your PATH by running:

       echo $PATH

      This will show you all directories currently included in your PATH. Verify if the directory with the cross-compiler is listed.

### Next Steps:

1. **Check the SDK and Toolchain Setup**: Ensure that your SDK is installed correctly, and the toolchain is properly set up. Run:

   arm-rockchip830-linux-uclibcgnueabihf-gcc --version

  If this command works, your toolchain is set up correctly.

2. **Compilation**: Once your environment is set up, you should be able to compile the code using the correct commands provided in the manual.

Let me know if you encounter any specific errors at these steps, and I can help further debug them.

Thank you so much for your help. It's just great.

I did everything according to the steps you indicated, I finally managed to edit and save my ~/.bashrc file. I put this line at the end of the file ~/.bashrc export

PATH=C:/tools/linux/toolchain/arm-rockchip 830-linux-uclibcgnueabihf/bin:$PATH.

I checked by going through the folders, there really is a compiler file at the end of the path. When executing the echo $PATH command, I get the following:

C:/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin:D:/PROGRAMMING/LuckFox/luckfox-pico-main/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin:D:/PROGRAMMING/LuckFox/luckfox-pico-main/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/wsl/lib:/mnt/c/Program Files/WindowsApps/CanonicalGroupLimited.Ubuntu22.04LTS_2204.5.10018.0_x64__79rhkp1fndgsc:/mnt/c/Program Files (x86)/Common Files/Intel/Shared Files/cpp/bin/Intel64:/mnt/c/Program Files (x86)/Common Files/Oracle/Java/javapath:/mnt/c/Program Files (x86)/NVIDIA Corporation/PhysX/Common:/mnt/c/Windows/system32:/mnt/c/Windows:/mnt/c/Windows/System32/Wbem:/mnt/c/Windows/System32/WindowsPowerShell/v1.0/:/mnt/c/Windows/System32/OpenSSH/:/mnt/c/Program Files (x86)/STMicroelectronics/STM32 ST-LINK Utility/ST-LINK Utility:/mnt/c/Program Files/Microsoft SQL Server/Client SDK/ODBC/110/Tools/Binn/:/mnt/c/Program Files (x86)/Microsoft SQL Server/120/Tools/Binn/:/mnt/c/Program Files/Microsoft SQL Server/120/Tools/Binn/:/mnt/c/Program Files/Microsoft SQL Server/120/DTS/Binn/:/mnt/c/Program Files (x86)/Windows Kits/8.1/Windows Performance Toolkit/:/mnt/c/Program Files (x86)/National Instruments/Shared/LabVIEW CLI:/mnt/c/Program Files (x86)/IVI Foundation/VISA/WinNT/Bin/:/mnt/c/Program Files/IVI Foundation/VISA/Win64/Bin/:/mnt/c/Program Files (x86)/IVI Foundation/VISA/WinNT/Bin:/mnt/c/Program Files/dotnet/:/mnt/c/dev/Git/cmd:/mnt/c/Program Files/nodejs/:/mnt/c/Program Files/PuTTY/:/mnt/d/PROGRAMMING/LuckFox/adb_fastboot:/mnt/d/PROGRAMMING/LuckFox/luckfox-pico-main/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf-gcc:/mnt/c/Users/NizorWorkS/AppData/Local/Microsoft/WindowsApps:/mnt/c/Program Files/Microsoft VS Code/bin:/mnt/c/Users/NizorWorkS/AppData/Roaming/npm:/snap/bin

The specified path to the compiler is indeed specified in the ~/.bashrc file,

C:/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin:

even 2 times another path was specified

D:/PROGRAMMING/LuckFox/luckfox-pico-main/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin

I also left the compiler file at this path. I hope this will not interfere with his further work? Or can it be somehow removed from the ~/.bashrc file?

When executing a command

arm-rockchip830-linux-uclibcgnueabihf-gcc --version

I get

arm-rockchip830-linux-uclibcgnueabihf-gcc: command not found

And one more thing confuses me, in windows the path is indicated via \ and in Linux via / do they need to be replaced when specifying the PATH?

It seems that I figured it out a little bit, I specified the path

/home/nizor/luckfox-pico/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin

in the ~/.bashrc file:

and now, when executing command

arm-rockchip830-linux-uclibcgnueabihf-gcc --version

I got

arm-rockchip830-linux-uclibcgnueabihf-gcc (crosstool-NG 1.24.0) 8.3.0 Copyright (C) 2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

As I understand it, is the compiler configured correctly?

Can I run the command arm-rockchip830-linux-uclibcgnueabihf-gcc gpio.c -o gpio to compile my project?

but I don't understand where the gpio.c file should be located and in which folder will the final gpio file be after compilation?

I have good news, I managed to set up the cross compiler and managed to compile my program. Now the problem is with transferring the file to the development board. I can't access it at 172.32.0.93, there is no such address on the network, there is only 172.32.0.70, and through it I can't perform the File Transfer item.

Look at these two links

https://wiki.luckfox.com/Luckfox-Pico/SSH-Telnet-Login

https://wiki.luckfox.com/Luckfox-Pico/Luckfox-Pico-File-Transfer