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Updated LPC43xx USB DFU Notes (markdown)

jboone
2012-10-12 15:28:55 -07:00
parent 2965b094f2
commit df0cfeddfc
1 changed files with 5 additions and 3 deletions
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8
LPC43xx-USB-DFU-Notes.md

@@ -23,12 +23,14 @@ DFU boot downloads to RAM then executes. Need a DFU suffix, but also a header
Add DFU suffix and address prefix:
> /usr/local/bin/dfu-suffix --pid=0x000c --vid=0x1fc9 --did=0x0 -s 0 -a blinky.dfu
Create header:
> echo "0000000: da ff 02 00 ff ff ff ff" | xxd -g1 -r > header.bin
Create header (based on UM10503 section 5.3.3 "Boot image header format"):
> echo "0000000: da ff {blocksL} {blocksH} {hash0} {hash1} {hash2} {hash3}" | xxd -g1 -r > header.bin
where the 02 means 2 x 512 + 16 bytes ... this should be automated.
where {blocksL} and {blocksH} are the low and high bytes of the length of the .bin file + 16 bytes, measured in 512-byte frames. "02 00" means 2 x 512 + 16 bytes. (this should be automated.)
Assume rounded up.
{hash0}..{hash3} = 0xFF. The value is not used, based on the HASH_ACTIVE field in the first two bytes.
Add header
> cat header.bin blinky.dfu > load.dfu