BSP Developer's Guide

VxWorks 5.5
BSP Developer’s Guide
pLinkHdr
Returns an LL_HDR_INFO structure containing header information that is
dependent upon the particular data-link layer that the END implements. For
more information, see Tracking Link-Level Information: LL_HDR_INFO, p.287.
pSpare
Expects a pointer to the spare information (if any) that was passed down to the
MUX using the pSpare parameter of the muxBind( ) call. This information is
passed back up to the protocol by each receiveRtn call. The use of this
information is optional and protocol-specific.
Passing Error Messages Up to the Protocol: stackError( )
The MUX uses the stackError( ) routine to pass error messages from the device to
the protocol. Your code for this routine must have an appropriate response for all
possible error messages. The prototype for the stackError( ) routine is as follows:
void stackError
(
END_OBJ* pEnd, /* pointer to END_OBJ */
END_ERR* pError, /* pointer to END_ERR */
void* pSpare /* pointer to protocol private data passed in muxBind */
)
You must declare your stackShutdownRtn( ) as returning void. Thus, there is no
returned function value for this routine. The parameters are:
pEnd
Expects the pointer returned as the function value of the muxBind( ) for this
protocol. This pointer identifies the device to which the MUX has bound this
protocol.
pError
Expects a pointer to an END_ERR structure, which end.h defines as follows:
typedef struct end_err
{
INT32 errCode; /* error code, see above */
char* pMesg; /* NULL-terminated error message, can be NULL */
void* pSpare; /* pointer to user defined data, can be NULL */
} END_ERR;
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