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Protocol
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Protocol
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# GXFP5120 Protocol Dump
# (revision #4)
Host Unknown (?) Goodix pack Packet End Of Transmission
>20 cc f2 3b 82 a0 09 00 a9 ae 06 00 [55 0e 52 00 00] 41 00 00
~~~~~~~~~~~ ~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~
| | | | | | | | (optional)
sequence# (+1 each req) | | checksum = a0+09+00 | | | checksum*
| | | | |
(rest is static: cc f2 xx 82) | length* = 9 | | payload (5 bytes)
| | |
flags = GOODIX_FLAGS_MSG_PROTOCOL | length* = 6
|
pid = GOODIX_CMD_QUERY_MCU_STATE
Host RTR signal (?) End Of Transmission
>4 bb f1 00 00
~~~~~~~~~~~ ~~~~~
(ready to receive) (optional)
Slave Goodix pack Packet
<256 a0 18 00 b8 ae 15 00 [02 02 31 00 00 00 01 00 90 63 00 00 00 00 00 00 00 00 19 19] 8c
~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| | | | | | |
| | checksum = a0+18+00 | | payload (20 bytes) checksum*
| | | |
| length* = 24 | length* = 21
| |
flags = GOODIX_FLAGS_MSG_PROTOCOL pid = GOODIX_CMD_QUERY_MCU_STATE (answer)
# `length*' means it matches the size of corresponding payload data
# `checksum*' means verified with `calc_checksum()' and is correct
# by Sdore, 2021
# www.sdore.me