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AP_Scripting: allow for 0x00 for 2nd checksum byte in INF_Inject driver 

the device does send 0x00 sometimes and data is valid
This commit is contained in:
Andrew Tridgell 2024-05-02 17:20:12 +10:00
parent 5a2b7c0ab2
commit e2767f899f
1 changed files with 5 additions and 1 deletions
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6
libraries/AP_Scripting/drivers/INF_Inject.lua
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@ -210,7 +210,11 @@ local function check_input()
local chk1 = state.chk1
state.check0, state.check1 = string.unpack("<BB", read_bytes(2))
local checksum_ok = chk0 == state.check0 and chk1 == state.check1
--[[
the device will sometimes use 0 for the 2nd 8 bits of the checksum
we will accept these packets, relying on the other header checks
--]]
local checksum_ok = chk0 == state.check0 and (chk1 == state.check1 or state.check1 == 0)
if not checksum_ok then
gcs:send_text(MAV_SEVERITY.INFO, string.format("chksum wrong (0x%02x,0x%02x) (0x%02x,0x%02x)", chk0, chk1, state.check0, state.check1))
return false