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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : usb_mem.c
* Author : MCD Application Team
* Version : V2.2.1
* Date : 09/22/2008
* Description : Utility functions for memory transfers to/from PMA
********************************************************************************
* THE PRESENT FIRMWARE 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 FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "usb_lib.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Extern variables ----------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : UserToPMABufferCopy
* Description : Copy a buffer from user memory area to packet memory area (PMA)
* Input : - pbUsrBuf: pointer to user memory area.
* - wPMABufAddr: address into PMA.
* - wNBytes: no. of bytes to be copied.
* Output : None.
* Return : None .
*******************************************************************************/
void UserToPMABufferCopy(u8 *pbUsrBuf, u16 wPMABufAddr, u16 wNBytes)
{
u32 n = (wNBytes + 1) >> 1; /* n = (wNBytes + 1) / 2 */
u32 i, temp1, temp2;
u16 *pdwVal;
pdwVal = (u16 *)(wPMABufAddr * 2 + PMAAddr);
for (i = n; i != 0; i--)
{
temp1 = (u16) * pbUsrBuf;
pbUsrBuf++;
temp2 = temp1 | (u16) * pbUsrBuf << 8;
*pdwVal++ = temp2;
pdwVal++;
pbUsrBuf++;
}
}
/*******************************************************************************
* Function Name : PMAToUserBufferCopy
* Description : Copy a buffer from user memory area to packet memory area (PMA)
* Input : - pbUsrBuf = pointer to user memory area.
* - wPMABufAddr = address into PMA.
* - wNBytes = no. of bytes to be copied.
* Output : None.
* Return : None.
*******************************************************************************/
void PMAToUserBufferCopy(u8 *pbUsrBuf, u16 wPMABufAddr, u16 wNBytes)
{
u32 n = (wNBytes + 1) >> 1;/* /2*/
u32 i;
u32 *pdwVal;
pdwVal = (u32 *)(wPMABufAddr * 2 + PMAAddr);
for (i = n; i != 0; i--)
{
*(u16*)pbUsrBuf++ = *pdwVal++;
pbUsrBuf++;
}
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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