QEMU STM32 vscode debugging environment configuration

QEMU learn STM32

One 、qemu Of STM32 Virtualized environment

Two 、Demo Makefile analysis

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Preface

The front has been built through efforts QEMU Of STM32 Virtual environment and run Demo. meanwhile , Analysis of the Makefile In fact, you can develop and learn STM32 了 . But the command line adds gdb Debugging program is not convenient , If a worker wants to do a good job, he must sharpen his tools first . Let's do it today VSCode debugging .

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One 、gdb Debug embedded programs

Read it carefully Demo programmatic Makefile, My surprise discovery Demo The author provides QEMU
Debugging interface of running program .

# QEMU debug targets
$(QEMU_DBG_TARGETS): %_QEMUDBG : %_ALL
	-killall -q qemu-system-arm
	$(QEMU_ARM_DIR)qemu-system-arm -M stm32-p103 -gdb tcp::3333 -S -kernel demos/$*/main.bin

$(QEMU_DBG_PTY_TARGETS): %_QEMUDBG_PTY : %_ALL
	-killall -q qemu-system-arm
	$(QEMU_ARM_DIR)qemu-system-arm -M stm32-p103 -gdb tcp::3333 -S -kernel demos/$*/main.bin -serial pty
	
$(QEMU_DBG_TEL_TARGETS): %_QEMUDBG_TEL : %_ALL
	-killall -q qemu-system-arm
	$(QEMU_ARM_DIR)qemu-system-arm -M stm32-p103 -gdb tcp::3333 -S -kernel demos/$*/main.bin -serial tcp::7777,server

We found that gdb The debug port of is tcp：：3333, After we run the program , On the command line, you only need to pass gdb From your own computer 3333 Port connection debugging , Try it as shown in the figure below ：

Run after entering

Input

target remote localhost:3333

You can start debugging , But you need to input commands to end and run . We are used to being in IDE In the way of mouse debugging , So I searched , Find out VSCode That can be done .

Two 、 To configure VSCode

Time is limited ,ubunut install VSCode The method of is not mentioned here , Here is a direct cut to the topic .

Start by opening VSCode, Switch the working directory to the current project directory , Then press CTRL+SHIFT+D Enter the debugging mode as shown below

stay lannch.json Add the following to the file , You can also directly click Add configuration

{
    
    //  Use  IntelliSense  Learn about properties . //  Hover to see the description of an existing property . //  For more information , Please visit : https://go.microsoft.com/fwlink/?linkid=830387 "version": "0.2.0", "configurations": [
        {
    
            "name": "(gdb)  start-up ", "type": "cppdbg", "request": "launch", // Our STM32 Program path , It could be an absolute path  "program": "${
    workspaceFolder}/demos/systick/main.elf", "args": [], "stopAtEntry": false, "cwd": "${
    workspaceFolder}", "environment": [], "externalConsole": true, "MIMode": "gdb", // Yours arm-none-eabi-gdb Installation path for  "miDebuggerPath": "/usr/bin/arm-none-eabi-gdb", // Debugging on this machine is generally localhost: Port number  // If the program is running on another computer or development board （ In embedded linux Often encountered in debugging ） It can be  //ip: Port number , for example ：192.168.1.123：3333 "miDebuggerServerAddress": "localhost:3333", "setupCommands": [
                {
    
                    "description": " by  gdb  Enable neat printing ",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                }
            ]
        }
    ]
}

After configuration, you can run debugging .
First, run the following command on the terminal to start QEMU Loader ：

make systick_QEMUDBG_PTY

Then click the debug button to start debugging

It can run at full speed or be debugged in one step , Click in front of the code to add breakpoints , It is very convenient to use .

summary

I am a person who likes to toss , However, I'm really busy at work and have no time to write in detail , It's only for casting bricks to attract jade , It's not very detailed . Now the running environment and development debugging tools are ready , Next I will record my study ARM Compilation and Cortex-M3 The process of . Finally, I hope to realize a simple embedded operating system , It can realize multi task scheduling , I hope the interested students can study together . Of course , Implementing the operating system is a little harder than I thought , I am learning and making progress .