martin/aqhomecontrol
Public Access
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

36
avr/comproto_stats.asm
View File

@@ -23,26 +23,30 @@ CPRO_EnqueueComSendStats:
pop r16
brcc CPRO_EnqueueComSendStats_error
ldi r17, CPRO_PAYLOAD_FLAGS_UID | (6<<CPRO_PAYLOAD_FLAGS_SHIFT_NUM) ; seconds + 6 bytes payload
ldi r17, CPRO_PAYLOAD_FLAGS_UID | (8<<CPRO_PAYLOAD_FLAGS_SHIFT_NUM) ; seconds + 8 bytes payload
ldi r18, CPRO_CMD_COMSENDSTATS
push xh
push xl
rcall cproBeginMsgWithVariablePayload ; (R3, R4, R16, R17, R18, R19, R20, R21, X)
lds r16, comStatsPacketsOut ; 6: packets out
lds r16, comStatsPacketsOut ; packets out
st X+, r16
lds r16, comStatsPacketsOut+1
st X+, r16
lds r16, comStatsCollisions ; 8: collisions
lds r16, comStatsCollisions ; collisions
st X+, r16
lds r16, comStatsCollisions+1
st X+, r16
lds r16, comStatsAborted ; 10: aborted
lds r16, comStatsAborted ; aborted
st X+, r16
lds r16, comStatsAborted+1
st X+, r16
lds r16, comStatsSendNoBuffer ; sendNoBuffer
st X+, r16
lds r16, comStatsSendNoBuffer+1
st X+, r16
pop xl
pop xh
rcall comCalcAndAddChecksumByte
rcall comCalcAndAddChecksumByte ; (R16, R17, R18, R19, X)
; mark buffer as enqueued with PRIO "important" (higher retry count)
ldi r20, COM_BUFFER_PRIO_IMPORTANT
@@ -78,26 +82,38 @@ CPRO_EnqueueComRecvStats:
pop r16
brcc CPRO_EnqueueComRecvStats_error
ldi r17, CPRO_PAYLOAD_FLAGS_UID | (6<<CPRO_PAYLOAD_FLAGS_SHIFT_NUM) ; seconds + 6 bytes payload
ldi r17, CPRO_PAYLOAD_FLAGS_UID | (12<<CPRO_PAYLOAD_FLAGS_SHIFT_NUM) ; seconds + 6 bytes payload
ldi r18, CPRO_CMD_COMRECVSTATS
push xh
push xl
rcall cproBeginMsgWithVariablePayload ; (R3, R4, R16, R17, R18, R19, R20, R21, X)
lds r16, comStatsPacketsIn ; 6: packets in
lds r16, comStatsPacketsIn ; packets in
st X+, r16
lds r16, comStatsPacketsIn+1
st X+, r16
lds r16, comStatsRecvCrcErrs ; 8: CRC errors
lds r16, comStatsRecvCrcErrs ; CRC errors
st X+, r16
lds r16, comStatsRecvCrcErrs+1
st X+, r16
lds r16, comStatsRecvErrs ; 10: IO errors
lds r16, comStatsRecvErrs ; IO errors
st X+, r16
lds r16, comStatsRecvErrs+1
st X+, r16
lds r16, comStatsRecvNoBuffer ; no buffer
st X+, r16
lds r16, comStatsRecvNoBuffer+1
st X+, r16
lds r16, comStatsHandled ; handled
st X+, r16
lds r16, comStatsHandled+1
st X+, r16
lds r16, comStatsMissed ; missed
st X+, r16
lds r16, comStatsMissed+1
st X+, r16
pop xl
pop xh
rcall comCalcAndAddChecksumByte
rcall comCalcAndAddChecksumByte ; (R16, R17, R18, R19, X)
; mark buffer as enqueued with PRIO "important" (higher retry count)
ldi r20, COM_BUFFER_PRIO_IMPORTANT