通过qemu 调试 FreeRTOS

发布时间：2026-04-18T21:04:21.695019 阅读：1284 分类：tech

一。准备编译环境
我的开发环境是Ubuntu24.04

a. 下载编译器

Arm Developer

Downloads | GNU Arm Embedded Toolchain Downloads – Arm Developer

Download the GNU Embedded Toolchain for ARM, an open-source suite of tools for C, C++, and Assembly programming for 32-bit ARM Cortex-A, ARM Cortex-M and Cortex-R families

如图：

b. 添加环境变量
vi /etc/profile
在文件最后添加
export PATH=$PATH:/usr/lib/gcc/gcc-arm-none-eabi-4_9-2014q4/bin
使能环境变量
source /etc/profile
注意：此命令只在当前终端有效，若需要在其它终端中使用，需要重启计算机。

c. 获取FreeRTOS源码并编译

git clone https://github.com/FreeRTOS/FreeRTOS.git --recurse-submodules

cd FreeRTOS/FreeRTOS/Demo/CORTEX_MPS2_QEMU_IAR_GCC/build/gcc
make

生成的镜像文件 output/RTOSDemo.out

二。启动测试
用下面命令启动虚拟机
qemu-system-arm -machine mps2-an385 -cpu cortex-m3 -kernel output/RTOSDemo.out -monitor none -nographic -serial stdio

三。代码调试
通过vscode打开这个demo的代码

code /FreeRTOS/FreeRTOS/Demo/CORTEX_MPS2_QEMU_IAR_GCC

在vscode中创建launch.json 和 tasks.json 内容如下图：

launch.json的内容如下：

{ "version": "0.2.0", "configurations": [

    {
        "name": "Launch QEMU RTOSDemo",
        "type": "cppdbg",
        "request": "launch",
        "program": "${workspaceFolder}/build/gcc/output/RTOSDemo.out",
        "cwd": "${workspaceFolder}",
        "miDebuggerPath": "arm-none-eabi-gdb",
        "miDebuggerServerAddress": "localhost:1234",
        "stopAtEntry": false,
        "preLaunchTask": "Run QEMU"
    },
]

}

tasks.json的内容如下：

{

"version": "2.0.0",
"tasks": [
    {
      "label": "Build QEMU",
      "type": "shell",
      "command": "make --directory=${workspaceFolder}/build/gcc",
      "problemMatcher": {
        "base": "$gcc",
        "fileLocation": ["relative", "${workspaceFolder}/build/gcc"]
      },
      "group": {
          "kind": "build",
          "isDefault": true
      }
    },
    {
      "label": "Run QEMU",
      "type": "shell",
      "command": "echo 'QEMU RTOSdemo started'; qemu-system-arm -machine mps2-an385 -cpu cortex-m3 -kernel ${workspaceFolder}/build/gcc/output/RTOSDemo.out -monitor none -nographic -serial stdio -s -S",
      "dependsOn": ["Build QEMU"],
      "isBackground": true,
      "problemMatcher": [
        {
          "pattern": [
            {
              "regexp": ".",
              "file": 1,
              "location": 2,
              "message": 3
            }
          ],
          "background": {
            "activeOnStart": true,
            "beginsPattern": ".",
            "endsPattern": "QEMU RTOSdemo started",
          }
        }
      ]
    }
]

}

按F5启动调试
如下图

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来源: linux.do查看原文

Downloads | GNU Arm Embedded Toolchain Downloads – Arm Developer

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