30 خطوط
1.6 KiB
Markdown
30 خطوط
1.6 KiB
Markdown
Place firmware files here and serve this directory as the existing TFTP
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server root. Checkout alone does not publish files over TFTP.
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Every transfer starts with sf probe 0:0. The reported total capacity must
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be exactly 16 or 32 MiB; an unknown or ambiguous result stops execution.
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The selected offsets and maximum sizes (hex bytes) are:
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| File | 16 MiB offset / maximum | 32 MiB offset / maximum |
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| --- | --- | --- |
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| u-boot-sunxi-with-spl.bin | 0 / 0x100000 | 0 / 0x200000 |
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| sun8i-v3s-licheepi-zero-dock.dtb | 0x100000 / 0x10000 | 0x200000 / 0x110000 |
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| zImage | 0x110000 / 0x500000 | 0x310000 / 0x500000 |
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| rootfs.squashfs | 0x610000 / 0x900000 | 0x810000 / 0x17f0000 |
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The 32 MiB layout allocates the remainder of flash to RootFS. These are
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selected project layouts, not partition tables read from the chip. DTB
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partitions and bootcmd must match the selected layout. A smaller actual
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RootFS region can be specified with --rootfs-size; larger overrides fail.
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Transfers reset and verify filesize=0 before TFTP, require successful
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transfer output and status, and compare the hexadecimal filesize with the
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local file and transfer count. First 32 bytes (U-Boot/DTB) or 64 bytes
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(Kernel/RootFS) are compared with the local file. Writes are read back at
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0x42800000 and compared in full. No automatic erase or retry is performed
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in transfer workflows. Flash must be erased before programming as needed.
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The separate erase workflow detects capacity and erases the entire chip,
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including firmware and saved environment. It verifies only the first 256
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bytes as FF, not every byte. No workflow automatically reboots the board.
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