EasySync USB2-F-7101 Manual de usuario descargar pdf (Pagina 18)

Document Reference No.: ES_000010

USB2-F-7x01 Programming Guide

Version 1.01

Clearance No.: ES# 27

2.2.13 canplus_setReceiveCallBack

Summary

Define a function that will receive a callback on all incoming messages. This is a blocking call and

must be called on a separate thread. To deregister this callback function, the

canplus_setReceiveCallback can be called with cbfn equal to NULL.

Definition

int canplus_setReceiveCallBack( CANHANDLE h, LPFNDLL_RECEIVE_CALLBACK cbfn );

Parameters

h handle returned by canplus_Open for the desired USB2-F-7x01

cbfn The callback function should be defined as

void fn( CANMsg *pMsg );

Remarks

Note that the channel has to be open to be able to set a callback function.

Return Codes

>0 ERROR_CANPLUS_OK

CAN channel is closed successfully

<=0 Error as noted below:

ERROR_CANPLUS_FAIL

CAN channel could enter listen mode

Sample code

void cbFunc(CANMsg *pMsg)

{

// callback function

}

void RegisterCB(LPFNDLL_RECEIVE_CALLBACK cbFunc)

{

int status;

if (ERROR_CANPLUS_OK == (status = canplus_setReceiveCallBack(hnd, cbFunc)))

printf("canplus_setCallBack successful!\n");

}

DWORD ThreadId;

HANDLE hThreadCB;

if ( NULL == ( hThreadCB = CreateThread( NULL,

0, (LPTHREAD_START_ROUTINE) RegisterCB,

cbFunc, 0, &ThreadId ) ) )

{

// Failure

}

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EasySync USB2-F-7101 Manual de usuario Pagina 18