Description of all data structures, definitions and functions in the message layer:
Prototype
· CANMSG_DATA CAN MESSAGE OBJECT
· CANMSG_PARA MESSAGE CONFIGURATION
Prototype
· CanMsgInit() INITIALISE CAN SIGNALS
· CanMsgOpen() OPEN A CAN MESSAGE
· CanMsgIoCtl() SIGNAL I/O CONTROL
· CanMsgRead() READ CAN SIGNAL
· CanMsgWrite() WRITE CAN SIGNAL
· CanMsgCreate() CREATE CAN SIGNAL
· CanMsgDelete() DELETE CAN SIGNAL
· CanFrmSet() WRITE VALUE INTO CAN FRAME
· CanFrmGet() READ VALUE OUT OF CAN FRAMEThis layer is responsible for the CAN message construction. A collection of CAN signals can be combined to a CAN message. The mapping of the CAN signals can be changed during runtime or configured static.
Message Layer Architecture
The CAN message layer is configurable during compile time to minimize memory footprint and optimize performance. The following list shows the configuration parameters and their functionality:
Configuration | Meaning | Range | Default |
|---|---|---|---|
| This parameter enables (1) or disables (0) the CAN message management. | 0 / 1 | 1 |
| This parameter defines the maximal number of managed CAN messages. | 1 ... 32767 | 1
|
| This parameter enables (1) or disables (0) the argument checking of the CAN bus API functions. | 0 / 1 | 1 |