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simplified message handling, switch from XOR checksum to CRC8 with polynomial 0x97.

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0x97 allows for detection of all 1-3 bit errors in a message of up to
119 bytes
(see https://www.faa.gov/aircraft/air_cert/design_approvals/air_software/media/TC-14-49.pdf)
This commit is contained in:
Martin Preuss
2023-04-07 23:22:40 +02:00
parent 4e1f08b567
commit 7eb462173c
33 changed files with 281 additions and 367 deletions
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8
aqhome/msg/msg_value2.h
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@@ -18,14 +18,6 @@
#define AQH_MSG_OFFS_VALUE2_TIMESTAMP 0
#define AQH_MSG_OFFS_VALUE2_VALUEID 4
#define AQH_MSG_OFFS_VALUE2_VALUETYPE 5
#define AQH_MSG_OFFS_VALUE2_VALUE 6
#define AQH_MSG_OFFS_VALUE2_DENOM 8
#define AQH_MSG_VALUE2_MINSIZE (AQH_MSG_OFFS_ALL_DATA_BEGIN+AQH_MSG_OFFS_VALUE2_DENOM+2)
#define AQH_MSG_VALUE2_TYPE_TEMP 1
#define AQH_MSG_VALUE2_TYPE_HUMIDITY 2