usbhalutil.c

来自「USB source code of Vxworks 5.6. It has d」· C语言 代码 · 共 58 行

/* usbHalUtil.c - Utility functions of HAL */

/* Copyright 2004 Wind River Systems, Inc. */

/*
Modification history
--------------------
01b,19jul04,ami Coding Convention Changes
01a,08mar04,pdg First.
*/

/*
DESCRIPTION

This file defines the utility functions which are used by the sub-modules of
the Hardware Adaption Layer.

INCLUDE FILES: usb/target/usbTcd.h, string.h

*/

/* includes */

#include "usb/target/usbTcd.h"     
#include <string.h>              

/*******************************************************************************
*
* trbHeaderInit - initialize a TCD request block header
*
* This function is used to initialize the TCD block header for different 
* function codes which is passed to the target controller driver.
*
* RETURNS: N/A
*
* ERRNO:
*   None.
*
* \NOMANUAL
*/

VOID trbHeaderInit
    (
    pTRB_HEADER	pTrb,		/* TCD request block header */
    pVOID	pTCDHandle,	/* identifier for the TCD */
    UINT16	uFunctionCode,	/* function code */
    UINT16	uTotalLen	/* total length of the TRB */
    )
    {
    
    /* Initialize the TRB */
    
    memset (pTrb, 0, uTotalLen);
    pTrb->handle = pTCDHandle;
    pTrb->function = uFunctionCode;
    pTrb->trbLength = uTotalLen;
    }