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提示！ The interfaces of this component contains inputs and outputs which drive and diagnose optional functionalities. With ⇘ CL2.GetProperty you can check, whether a driver supports a certain functionality or not. If not, its input and output values are irrelevant. |
This function of the ⇘ CAA_CanL2.library opens a CAN interface for subsequent access. Successful operation returns a handle on the CAN interface.
Not every hardware supports each baud rate. If a baud rate is not supported or if the interface cannot be opened due to different reasons, the function returns “CAA.gc_hINVALID”.
In this case the memory is allocated from the heap.
The function can be called several times on the same interface, so that multiple parts of a program can work on it. Upon the first call the baud rate must be set to a value greater than zero. In all subsequent calls the baud rate cannot be changed and must be passed with the value zero.
Depending on the implementation, it is possible to use other baud rates than the standard rates mentioned below, for example 333 kbit.
Input:
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usiNetId |
USINT |
number of the interface |
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uiBaudrate |
UINT |
>0: First opening of interface. Possible values for baud rate [kbit/s]: 10, 20, 50, 100, 125, 250, 500, 800 or 1000. 0: Open interface for further client with same baud rate |
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xSupport29BitIds* |
BOOL |
FALSE: 11 Bit-Ids only; TRUE: 29 Bit-Ids also supported |
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ctMessages |
CAA.COUNT |
number of messages for which memory must be allocated |
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peError |
POINTER TO CL2.ERROR |
pointer to error code (enumeration type) |