Shulou(Shulou.com)06/02 Report--

Today, I'm going to talk to you about how to use raspberry pie to build an embedded C++ debugging environment, which many people may not quite understand. In order to make you understand better, the editor summarized the following. I hope you can get something from this article.

Here we take the use of raspberry pie 4b as an example to illustrate the construction of an embedded C++ execution environment. Raspberry pie itself can be purchased directly from major shopping websites, with prices ranging from 300 to 500 yuan. All choose raspberry pie because it has a perfect system and is easy to use. But what needs to be explained is that most of the content described in this article is not limited to raspberry pie. Prepare raspberry pie to download image file

Open the system mirror download page of the official raspberry pie website:

Https://www.raspberrypi.org/downloads/raspbian/

We directly select the largest version in the red box. After the download is complete, we get the following files (the timestamp may be different):

2020-02-05-raspbian-buster-full.zip

Unzip the file to get the following image file:

2020-02-05-raspbian-buster-full.img burns and writes image files

First of all, choose a TF card above 8G, preferably above Class4. It is then formatted using SDCardFormator.

Start DiskImager and select the previously downloaded / unzipped image file.

Next, select the device. Since DiskImager does not automatically select the correct SD card, the drive letter must not be mistaken. Press the write button to start the write process.

Write successful.

Software download address

The development materials provided by the seller when buying raspberry pie should include these two softwares, and readers can also use the link below to download them.

SDCardFormator:

Https://www.sdcard.org/downloads/formatter/eula_windows/SDCardFormatterv5_WinEN.zip

DiskImageer:

Basic information of https://mirrors.tuna.tsinghua.edu.cn/osdn/sfnet/w/wi/win32diskimager/Archive/win32diskimager-1.0.0-install.exe settings

Insert the burnt TF card into the TF slot of the raspberry pie, connect the keyboard, mouse and monitor, and start the raspberry pie. After the raspberry pie starts, select the country and region and change the password. Next, set up a web link. If there is a wireless router, you can also use Wifi to connect. The operation of updating the software is optional, not necessary.

Click the [raspberry] icon in the upper left corner of the screen to enter the [Preferences]-[Raspberry PI Configurations] menu. Enter the [Interface] screen and select SSH to be valid and close the screen.

Enter the raspberry terminal screen, enter the ifconfig command, and record the ip address (for example: 192.168.3.233). If the IP address acquisition fails, you can reset it by entering the following command.

Sudo raspi-config

Remotely link raspberry pie

Enter the terminal screen of the Ubuntu host and enter the following command (address initializes the Ip address recorded during the raspberry pie):

Ssh pi@192.168.3.233

The first login will be a key, security-related tips, just accept it directly. Next, after entering the password, the following screen indicates that the login is successful. From then on, all operations on the raspberry pie side are done through this terminal window, eliminating the need for separate peripherals.

In addition to using the SSH command in Ubuntu, you can also use Putty to connect raspberry pie in Window, in much the same way.

Prepare C++ execution and debugging environment to install NFS service (Ubuntu development host)

Open a terminal window on the Ubuntu host and enter the following command to install the NFS service. After the service is installed, you can access the directory shared through NFS from the raspberry pie.

Sudo apt get install nfs-kernel-server enter the following command to edit the NFS configuration file.

Sudo vi / etc/exports

Add the following at the end of the file. The goal is to expose the content in / home/xwg/Raspberry and grant maximum permissions. You can decide on your own according to the location of the development environment.

/ home/xwg/RaspberryPi * (rw,sync,no_root_squash)

After the configuration file is modified and saved, enter the following command in the terminal window to start the NFS service.

Sudo / etc/init.d/nfs-kernel-server start

Connect to the development directory (raspberry pie)

Start the raspberry pie SSH client and enter the following command to mount the NFS directory shared by the Ubuntu host.

Mount-t nfs 192.168.3.202:/home/xwg/EasyARM / mnt-o nolock

The IP address in the command needs to be replaced with the address of the Utuntu host, and the directory needs to be the same as the directory shared earlier. After the installation is successful, you can go to the / mnt directory, and if you see the content shared by the Ubuntu host, it means that the mount is successful in the NFS directory. Using this directory, you can directly access the results of cross-compilation on the Ubuntu host without having to copy files every time.

Find the arm_cpp project you created in the previous article, enter the Debug directory, and enter the following command:

. / arm_cpp

The following should appear in the terminal:

Hello GCC/G++ Compiler!

Remote debugging and installation of GdbServer

Enter the following command in the raspberry pie terminal window to install gdbserver.

Sudo apt-get install gdbserver

Enter the following command to confirm the installation result. If you can pass or normal version information, the installation is successful.

Gdbserver-version

Install gdb-multiarch

Enter the following command in the terminal window of the Ubuntu host to install the multi-platform version of gdb.

Sudo apt-get install gdb-multiarch

After the installation is complete, confirm the installation results with the following command:

Gdb-multiarch-v

Reference Information:

Https://packages.ubuntu.com/bionic-updates/amd64/gdb-multiarch/download

Gdb debugging and remote debugging

Enter the arm_cpp/Debug directory through the raspberry pie terminal and enter the following command:

Gdbserver: 10000 arm_cpp

The raspberry pie terminal is as follows:

Enter the following command in the terminal window of the Ubuntu host to start gdb-multiarch.

Gdb-multiarch

The picture is shown as follows:

Enter the following command to link to the GdbServer on the raspberry side:

Target remote 192.168.3.233:10000

When the link is successful, the terminal screen of the Ubuntu host is shown as follows:

The terminal on the raspberry side is as follows:

Enter the c command execution program in the gdb screen. You can see the following output in the raspberry pie terminal:

At this point, the installation of the raspberry remote debugging environment is complete!

After reading the above, do you have any further understanding of how to use raspberry pie to build an embedded C++ debugging environment? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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