DriverOpenH (FUN)

FUNCTION DriverOpenH : CAA.HANDLE

Opens a CAN interface and allocates memory from heap. 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. The function can be called several times on the same interface, so that multiple parts of a program can work on it. You can set uiBaudrate to 0 if the interface is already opened or if the default baudrate from configuration file should be used. See following section in configuration file:

[CmpCAACanL2]

;If setting PersistentBaudrate is enabled (0: disabled; 1: enabled)

;the baudrate will be stored into Net.X.DefaultBaudrate (where X equals NetId) when opening the driver.

PersistentBaudrate=1

;Default baudrate for CAN network 0. This baudrate will be used when the network is opened (e.g from CmpBlkDrvCan or CANopen) with the baudrate set to 0.

;Net.0.DefaultBaudrate=1000

Net.0.DefaultBaudrate=1000

InOut:

Scope	Name	Type	Comment
Return	DriverOpenH	CAA.HANDLE	handle of CAN interface or CAA.gc_hINVALID if failed.
Input	usiNetId	USINT	number of CAN interface [0..n]
	uiBaudrate	UINT	Baudrate in kBit/s e.g. 1000 for 1 Mbit
	xSupport29Bits	BOOL	FALSE: only 11-Bit IDs, TRUE: support also 29-Bit
	ctMessages	CAA.COUNT	number of transmit messages which should be allocated
	peError	POINTER TO ERROR	optional pointer to error enum