sys: 0x600
bm:3
ERROR:   sd: invalid bootinfo magic code:0x0
ERROR:   invalid bootinfo image.
ERROR:   entering download mode.
ROM: usb download handler
usb2d_initialize : enter
Controller Run
usb rst int
SETUP: 0x80 0x6 0x100
usb rst int
SETUP: 0x0 0x5 0x3a
SETUP: 0x80 0x6 0x100
SETUP: 0x80 0x6 0x200
SETUP: 0x80 0x6 0x200
SETUP: 0x80 0x6 0x300
SETUP: 0x80 0x6 0x302
SETUP: 0x80 0x6 0x301
SETUP: 0x80 0x6 0x30a
SETUP: 0x0 0x9 0x1
usb_rx_bytes : len= 4096 pBuf= 0xc0838720
SETUP: 0x80 0x6 0x302
SETUP: 0x80 0x6 0x304


=======================
⋊> hack@morise ⋊> ~/k/f/vendor-sdk tree .                                                                                                  23:47:35
.
├── Bianbu-Minimal-K1-V2.3.5-20260601180942.zip
├── bootfs.ext4
├── env.bin
├── factory
│   ├── bootinfo_emmc.bin
│   ├── bootinfo_sd.bin
│   ├── bootinfo_spinand.bin
│   ├── bootinfo_spinor.bin
│   └── FSBL.bin
├── fastboot.yaml
├── flash-sdcard
├── flashserver
├── fw_dynamic.itb
├── genimage.cfg
├── partition_2M.json
├── partition_flash.json
├── partition_universal.json
├── rootfs.ext4
└── u-boot.itb

2 directories, 18 files
⋊> hack@morise ⋊> ~/k/f/vendor-sdk cat flash-sdcard                                                                                        23:47:38
#!/bin/bash
sgdisk -o /dev/mmcblk0
sgdisk -a 128 \
        -n 1:256:767 -t 1:8300 \
        -n 2:768:895 -t 2:8300 \
        -n 3:2048:4095 -t 3:8300 \
        -n 4:4096:8191 -t 4:8300 \
        -n 5:8192:532479 -t 5:8300 \
        -n 6:532480:4726783 -t 6:8300 \
        /dev/mmcblk0
dd if=factory/FSBL.bin of=/dev/mmcblk0p1 bs=512 seek=0 status=progress
dd if=env.bin of=/dev/mmcblk0p2 bs=512 seek=0 status=progress
dd if=fw_dynamic.itb of=/dev/mmcblk0p3 bs=512 seek=0 status=progress
dd if=u-boot.itb of=/dev/mmcblk0p4 bs=512 seek=0 status=progress
dd if=bootfs.ext4 of=/dev/mmcblk0p5 bs=1M status=progress
dd if=rootfs.ext4 of=/dev/mmcblk0p6 bs=1M status=progress