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/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
* File Name : usb_mem.c
* Author : MCD Application Team
* Date First Issued : 05/18/2006 : Version 1.0
* Description : utility functions for memory transfers
********************************************************************************
* History:
* 05/24/2006 : Version 1.1
* 05/18/2006 : Version 1.0
********************************************************************************
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH
* CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS
* A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT
* OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
* OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
* CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
#include "usb_lib.h"
#include "usb_mem.h"
/*******************************************************************************
* Function Name : UserToPMABufferCopy
* Description : Copy a buffer from user memory to packet memory area
* Input : - pbUsrBuf = pointer to user memory area
* - wPMABufAddr = address into PMA
* - wNBytes = number of bytes to be copied
* Output : None
* Return value : None
*******************************************************************************/
void UserToPMABufferCopy(BYTE *pbUsrBuf,WORD wPMABufAddr, WORD wNBytes)
{
DWORD *pdwVal;
DWORD wTra, i;
union
{
BYTE *bTra;
DWORD *wTra;
}pBuf;
int wNTrasf=wNBytes;
pdwVal= (DWORD *)(PMAAddr+(DWORD)((wPMABufAddr)));
pBuf.wTra = &wTra;
for(i=0;i < wNTrasf;)
{
*(pBuf.bTra ) = *pbUsrBuf++;
i++;
*(pBuf.bTra+1) = *pbUsrBuf++;
i++;
*(pBuf.bTra+2) = *pbUsrBuf++;
i++;
*(pBuf.bTra+3) = *pbUsrBuf++;
i++;
*pdwVal = wTra;
pdwVal++;
}
} /* UserToPMABufferCopy */
/*******************************************************************************
* Function Name : PMAToUserBufferCopy
* Description : Copy a buffer from packet memory area to user memory
* Input : - pbUsrBuf = pointer to user memory area
* - wPMABufAddr = address into PMA
* - wNBytes = number of bytes to be copied
* Output : None
* Return value : None
*******************************************************************************/
void PMAToUserBufferCopy(BYTE *pbUsrBuf,WORD wPMABufAddr, WORD wNBytes)
{
BYTE *pbVal;
WORD wNTrasf=wNBytes;
if((wNBytes) == 0) return;
pbVal = (BYTE *)(PMAAddr + wPMABufAddr);
while(1)
{
*pbUsrBuf++ = *pbVal++;
if((--wNTrasf) == 0) return;
*pbUsrBuf++ = *pbVal++;
if((--wNTrasf) == 0) return;
}/* while */
} /* PMAToUserBufferCopy */
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