7u83/stcgal
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

stc15/usb15: add password feature notes

Browse Source 
I'm not going to implement this right now as it is rather dangerous.
This commit is contained in:
Grigori Goronzy 2016-05-15 02:28:56 +02:00
parent 61a4fa0e4f
commit 7ba95eab68
1 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
doc/stc15-options.txt
View File

@ -111,7 +111,31 @@ in set options packet:
46 B9 6A 00 4B 04 00 00 5A A5 FF FF FF 00 FF FF
00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00 00 FF A8 FF EE FF E0 FF FD 03 FF FF FF FF FF
^^
MCSP
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
FF FD FF FF FF 75 BF F7 BC 9F 3A 80 16
^^
MCSY
password setting
the password is sent with packet type 0x07 and checked before erase with packet type 0x05. setting the password uses two fields.
index 22 of the option block encodes the password length in bytes (MCSP, see above). bit 3 in MCS3 decides whether the password
will be checked. if the bit is set, no password check occurs. if it is reset, a password check occurs.
quick dump from USB-ISP packets:
set: foobar
0000 ff ff ff 00 ff ff 00 05 ff ff ff ff ff ff ff 07 ................
0010 ff ff ff ff ff ff ff 07 ff 06 01 ff 6e ff 36 58 ............n.6X
0020 ff 00 ff f5 03 ff ff 0c ff ff ff ff ff ff ff 07 ................
0030 ff ff ff ff ff ff ff 07 ff ff ff ff ff ff ec 1a ................
0040 ff ff ff 99 7f f7 bc 38 9f 61 .......8.a
reset:
0000 ff ff ff 00 ff ff 00 05 ff ff ff ff ff ff ff 07 ................
0010 ff ff ff ff ff ff ff 07 ff 00 01 ff 6e ff 36 5e ............n.6^
0020 ff 00 ff fd 03 ff ff 04 ff ff ff ff ff ff ff 07 ................
0030 ff ff ff ff ff ff ff 07 ff ff ff ff ff ff ec 1a ................
0040 ff ff ff 99 7f f7 bc 38 9f 61 .......8.a