rt-thread/bsp/nuvoton/numaker-iot-ma35d1/nuwriter_scripts/pack-sd.json

{
    "image":
    [
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          "offset": "0x400",
          "file": "conv/header.bin",
          "type": 0
        },
        {
          "offset": "0x1000",
          "file": "ddrimg/enc_ddr3_winbond_512mb.bin",
          "type": 0
        },
        {
          "offset": "0x4000",
          "file": "../rtthread.bin",
          "type": 0
        }
    ]
}