Civil Engineering Reference
In-Depth Information
− global error interrupt for DLC errors and lost messages
− reception interrupt for each receive FIFO unit (fill level of FIFO is adjustable
individually)
− reception interrupt for each multi-purpose FIFO unit (fill level of FIFO is
adjustable individually)
− transmit interrupt for each multi-purpose FIFO unit (adjustable either on
every message, or on the last sent message)
− transmit interrupt for each transmission queue (adjustable either on every
message, or on the last sent message)
− transmit interrupt for every channel, where the message buffer is not assigned
to a multi-purpose FIFO nor to a transmission queue
− transmit abortion interrupt for every channel
− THL interrupt for every channel (adjustable either on every new entry or on
fill level)
− error interrupt for every channel (adjustable on various and multiple error
sources).
• Time stamp of reception.
• Transmission delay timers.
• Individual activation and deactivation of channels.
• Diagnostic capability: automatic routing of received messages from selectable or
all channels to be output on another (diagnostic) channel.
• Diagnostic mirroring capability: automatic routing of received and sent mes-
sages from selectable or all channels to be output on another (diagnostic) chan-
nel.
• Self-test modes with internal and external (including transceiver) loop, to fulfil
ISO safety requirements.
• Listen-only mode for bus analysis purposes.
3.3.2
Initialization of RS-CAN
3.3.2.1
Operation Modes
The RS-CAN module is able to communicate with several CAN channels, where
each channel may have its individual configuration. For this reason, besides the
global operation mode, there are operation modes for each channel. After a hard
reset, the RS-CAN module is globally disabled, which means that all operation
modes are set to
sleep mode
. As a general rule, the operation modes of the channels
always follow the global operation mode in the direction of shutdown or stopping,
but the channels can only be moved into the activation direction if the global opera-
tion mode already has this state.
Sleep Mode
After its entry upon a hard reset, the RS-CAN module automatically
initializes its local RAM, where messages, lists, queues, and configurations are sto-
