Joined: 29 Jan 2015 Posts: 8 Location: india chennai
CAN is broadcast or multicast- if CAN have only one node?
Posted: Sun Feb 01, 2015 11:32 pm
CAN is broadcast or multicast- if CAN have only one node?
Ttelmah
Joined: 11 Mar 2010 Posts: 19378
Posted: Mon Feb 02, 2015 12:08 am
CAN is a broadcast bus. All nodes receive (at the hardware level) all data. Then the key is message filters. These determine whether a device accepts a packet. So two devices can talk to each other on the bus (within the limits of priority), as if they were talking without the other devices there. One of the bits in the messages can specify that a message is 'broadcast', in which case everyone sees it (BR=0).
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