104 lines
2.3 KiB
Plaintext
104 lines
2.3 KiB
Plaintext
______________________________________
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Recap: message in CAN protocol
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↓ 11b ↓ 64b (8 bytes)
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+----+-----------------+ - - -
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| id | body | don’t care for now
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+----+-----------------+ - - -
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Priority is controlled by the ID: if a message with a higher ID is on the bus, lower messages will
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be silenced due to the design of CAN.
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______________________________________
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OBUS message specification
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ID:
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b bb bbbbbbbb
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| | ↓
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| ↓ module-ID: 2⁸=256
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↓ type: 2²=4
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priority bit (so that each type can send priority messages if need be, 0 = high priority, 1 = low priority)
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type:
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- 0 module-ID 0: controller, >0: info
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- 1 puzzel
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- 2 needy
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- 3 reserved for future use
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Payload:
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[ B B B B B B B B ]
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-
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↓
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type of the message (per module type)
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- - - - - - - - - - - - - - - - - - -
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Types for controller:
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- 0 acknowledge valid message
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[ X B B B B B B B ]
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- - ----------
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| ↓ reserved
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↓ module ID
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type
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- 1 hello
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[ X B B B B B B B ]
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--------------
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reserved
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- 2 game start
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[ X B B B B B B B ]
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-------- - - -
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time left ↓ ↓ #puzzle modules
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#strikes #max strikes
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- 3 state (every x ms – e.g. in the middle of each second)
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[ X B B B B B B B ]
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-------- - - -
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time left ↓ ↓ #puzzle modules left
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#strikes #max strikes
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- 4-6 solved, timeout, strikeout
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[ X B B B B B B B ]
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-------- - - -
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end time ↓ ↓ #puzzle modules left
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#strikes #max strikes
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- 7 info start
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[ X B B B B B B B ]
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-------- -----
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↓ reserved
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random seed
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- 8-255 reserved
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- - - - - - - - - - - - - - - - - - -
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Types for info:
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These are managed by MOANA: the Modules of OBUS Authority for Numbers Assignment.
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You can reach MOANA in the ~obus Mattermost channel.
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(none yet)
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- - - - - - - - - - - - - - - - - - -
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Types for modules:
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- 0 register
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[ X B B B B B B B ]
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--------------
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reserved
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- 1 strike
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[ X B B B B B B B ]
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↓ -----↓------
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#strikes reserved
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- 2 solved (not for needy modules)
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[ X B B B B B B B ]
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--------------
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reserved
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