HMS FlexRay CCM, Руководство по программированию

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Copyright IXXAT Automation GmbH UCI Programming Manual FlexRay, V1.13
External interfaces
29
5.1.4.10 SendMsg
With this method FlexRay messages can be sent to the FlexRay network. You can
call
GetTxMsgInfoCount()
and
GetTxMsgInfo()
first, to retrieve the informa-
tion which message you are allowed to send.
It is also possible to sent special control message for controlling the transmit buf-
fer behavior for instance. Therefore the
UCI_FLXCONTROLMSG substructure is
used.
SendMsg()
can only be called when the controller is in running mode. See Fig.
4-1
Prototype:
virtual HRESULT __stdcall SendMsg( PUCI_FLXMSG pMsg,
DWORD dwTxMsgInfoIndex );
Parameters:
pMsg IN Pointer to union structure with substructure. The sub-
structure is filled with the TX message you want to send on
the FlexRay Network or a control message for special control-
ling purposes.
If you want to send a FlexRay message the wMessageType
parameter has to be set to UCI_FLXMSGTYPE_DATA, the
qwTimestamp parameter is don’t care. The internal structure
UCI_FLXDATAMSG has to be filled with the FlexRay message
to be sent on the FlexRay Network.
If you want to send a control message the wMessageType
parameter has to be set to UCI_FLXMSGTYPE_CONTROL, the
qwTimestamp parameter is don’t care. The internal structure
UCI_FLXCONTROLMSG has to be filled with the control mes-
sage to be executed.