how to use pyocd

本文旨在记录pyocd的 烧录程序 包管理 MCU的debug

一、 list 命令

  1. -p 查看在线探针
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pyocd list -p
  #   Probe/Board    Unique ID                  Target
--------------------------------------------------------
  0   STM32 STLink   380016000B2D373637365744   n/a

  1. -t 查看在线的MCU
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pyocd list -t

二、 flash 命令

  1. 使用指定pack包(Keil.LCM32F0xx_DFP.0.4.70.pack)烧录指定hex(*.hex)到指定MCU(lcm32f037)
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pyocd flash -t lcm32f037 --pack ../Keil.LCM32F0xx_DFP.0.4.70.pack build/*.hex

三、cmd命令

  1. 读取指定 MCU 指定地址 指定长度
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pyocd cmd -t stm32g431cbtx -c "read32 0x1fff7800 4"
1fff7800:  ebeff8aa                               |....|
  1. 写入指定 MCU 指定地址 指定数据
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pyocd cmd -t stm32g431cbtx -c "write32 0x1fff7800 0xffeff8aa"
  1. 使用pyocd 烧录选项字 example: pyocd cmd -t TargetIC -c “Write_Option_Byte_Addr Value” 目前还有问题
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pyocd cmd -t stm32f103rc -c "write32  0x1FFF7800  0xebeff8aa"
  1. 查看pyocd cmsis管理的p

十、 vscode + Arm CMSIS Debugger + pyocd 调试代码

  1. 通用launch.json文件
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{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "CMSIS Debugger: pyOCD",
            "type": "gdbtarget",
            "request": "launch",
            "cwd": "${workspaceFolder}",
            "program": "${workspaceFolder}/build/at32_cdc.elf",
            "gdb": "arm-none-eabi-gdb",
            "definitionPath": "/home/ha/.local/share/cmsis-pack-manager/ArteryTek/AT32F402_405_DFP/2.1.1/SVD/AT32F405xx_v2.svd",

            "initCommands": [
                "monitor reset halt",
                "break main"
            ],
            "target": {
                "server": "pyocd",
                "port": "3333",
                "serverParameters": [
                    "--target",
                    "AT32F405CBT7",
                    "--pack",
                    "/home/ha/.local/share/cmsis-pack-manager/ArteryTek/AT32F402_405_DFP/2.1.1.pack"
                ],
                "options": {
                    "frequency": 1000000,
                    "allow_no_cores": true
                },
                "override": {
                    "memory_map": [
                        {
                            "name": "RAM",
                            "start": 536870912,
                            "size": 71680,
                            "access": "rwx"
                        },
                        {
                            "name": "FLASH",
                            "start": 134217728,
                            "size": 262144,
                            "access": "rx",
                            "is_boot_memory": true
                        }
                    ]
                },
            }
        }
    ]
}

  1. PS definitionPath 是制定SVD路径 可以查看寄存器表的信息 参考插件 Peripheral Inspector 描述

  2. PS 如果没有serverParameters描述, pyocd默认会将MCU识别成STM32F103RB 所以我们要在这里制定芯片名和pack包 因此这里等效于

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pyocd gdbserver -target AT32F405CBT7 --pack /home/ha/.local/share/cmsis-pack-manager/ArteryTek/AT32F402_405_DFP/2.1.1.pack --port 3333