added UDP multicast support

dronecan / pydronecan

python DroneCAN code generation, interface and utilities

MIT License

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Closed tridge closed 1 year ago

tridge commented 1 year ago

this allows for both bxCAN and CANFD packets to be sent over UDP multicast

multicast address is 239.65.82.B, last octet is logical bus number UDP port number is 57732

packet format is

MAGIC 0x2934 16 bit
16 bit CCITT CRC over all bytes after CRC
16 bit flags
32 bit message ID
data[]

all data is little endian

standard URLs mcast: -> first bus mcast:0 -> first bus mcast:1 -> 2nd bus

magicrub commented 1 year ago

Is this something we want to add to the initial networking PR?

tridge commented 1 year ago

Is this something we want to add to the initial networking PR?

I think it should be separate, I want to get it into libcanard, pydronecan and GUI tool first