RP2040 修改Flash大小 (软件)

硬件上很简单,8脚SOP Flash应该每个人都会更换,更换后再上电就进入DFU,在DFU里面随便放个固件就正常,当然,MicroPython总是认为只有2M Flash.

修改SDK(.../pico-sdk/src/rp2_common/pico_standard_link/memmap_default.ld).

MEMORY
{
    FLASH(rx) : ORIGIN = 0x10000000, LENGTH = 16384k
    RAM(rwx) : ORIGIN =  0x20000000, LENGTH = 256k
    SCRATCH_X(rwx) : ORIGIN = 0x20040000, LENGTH = 4k
    SCRATCH_Y(rwx) : ORIGIN = 0x20041000, LENGTH = 4k
}

修改调试配置(launch.json):

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Pico Debug",
            "cwd": "${workspaceRoot}",
            "executable": "${command:cmake.launchTargetPath}",
            "request": "launch",
            "type": "cortex-debug",
            "servertype": "openocd",
            // This may need to be "arm-none-eabi-gdb" for some previous builds
            "gdbPath" : "gdb-multiarch",
            "device": "RP2040",
            "configFiles": [
                // This may need to be "interface/picoprobe.cfg" for some previous builds
                "interface/cmsis-dap.cfg",
                "target/rp2040.cfg"
            ],
            "openOCDLaunchCommands": ["adapter speed 5000","set _FLASHSIZE 0x200000"],
            "svdFile": "${env:PICO_SDK_PATH}/src/rp2040/hardware_regs/rp2040.svd",
            "runToEntryPoint": "main",
            // Work around for stopping at main on restart
            "postRestartCommands": [
                "break main",
                "continue"
            ]
        }
    ]
}

MicroPython稍微麻烦一些,需要重新编译固件,不过不建议买更大容量的跑mpy,因为本身用途不大.