/******************** (C) COPYRIGHT 2009 STMicroelectronics ********************
* File Name          : usb_mem.c
* Author             : MCD Application Team
* Version            : V3.0.1
* Date               : 04/27/2009
* 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(uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
{
  uint32_t n = (wNBytes + 1) >> 1;   /* n = (wNBytes + 1) / 2 */
  uint32_t i, temp1, temp2;
  uint16_t *pdwVal;
  pdwVal = (uint16_t *)(wPMABufAddr * 2 + PMAAddr);
  for (i = n; i != 0; i--)
  {
    temp1 = (uint16_t) * pbUsrBuf;
    pbUsrBuf++;
    temp2 = temp1 | (uint16_t) * 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(uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
{
  uint32_t n = (wNBytes + 1) >> 1;/* /2*/
  uint32_t i;
  uint32_t *pdwVal;
  pdwVal = (uint32_t *)(wPMABufAddr * 2 + PMAAddr);
  for (i = n; i != 0; i--)
  {
    *(uint16_t*)pbUsrBuf++ = *pdwVal++;
    pbUsrBuf++;
  }
}

/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
