usb_mem.c

00001 /******************** (C) COPYRIGHT 2010 STMicroelectronics ********************
00002 * File Name          : usb_mem.c
00003 * Author             : MCD Application Team
00004 * Version            : V3.2.1
00005 * Date               : 07/05/2010
00006 * Description        : Utility functions for memory transfers to/from PMA
00007 ********************************************************************************
00008 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
00009 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
00010 * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
00011 * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
00012 * CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
00013 * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
00014 *******************************************************************************/
00015 #ifndef STM32F10X_CL
00016 
00017 /* Includes ------------------------------------------------------------------*/
00018 #include "usb_lib.h"
00019 
00020 /* Private typedef -----------------------------------------------------------*/
00021 /* Private define ------------------------------------------------------------*/
00022 /* Private macro -------------------------------------------------------------*/
00023 /* Private variables ---------------------------------------------------------*/
00024 /* Extern variables ----------------------------------------------------------*/
00025 /* Private function prototypes -----------------------------------------------*/
00026 /* Private functions ---------------------------------------------------------*/
00027 /*******************************************************************************
00028 * Function Name  : UserToPMABufferCopy
00029 * Description    : Copy a buffer from user memory area to packet memory area (PMA)
00030 * Input          : - pbUsrBuf: pointer to user memory area.
00031 *                  - wPMABufAddr: address into PMA.
00032 *                  - wNBytes: no. of bytes to be copied.
00033 * Output         : None.
00034 * Return         : None .
00035 *******************************************************************************/
00036 void UserToPMABufferCopy(uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
00037 {
00038   uint32_t n = (wNBytes + 1) >> 1;   /* n = (wNBytes + 1) / 2 */
00039   uint32_t i, temp1;
00040   uint16_t *pdwVal;
00041   pdwVal = (uint16_t *)(wPMABufAddr * 2 + PMAAddr);
00042   for (i = n; i != 0; i--)
00043   {
00044     temp1 = (uint16_t) * pbUsrBuf;
00045     pbUsrBuf++;
00046     *pdwVal++ = temp1 | (uint16_t) * pbUsrBuf << 8;
00047     pdwVal++;
00048     pbUsrBuf++;
00049   }
00050 }
00051 /*******************************************************************************
00052 * Function Name  : PMAToUserBufferCopy
00053 * Description    : Copy a buffer from user memory area to packet memory area (PMA)
00054 * Input          : - pbUsrBuf    = pointer to user memory area.
00055 *                  - wPMABufAddr = address into PMA.
00056 *                  - wNBytes     = no. of bytes to be copied.
00057 * Output         : None.
00058 * Return         : None.
00059 *******************************************************************************/
00060 void PMAToUserBufferCopy(uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
00061 {
00062   uint32_t n = (wNBytes + 1) >> 1;/* /2*/
00063   uint32_t i;
00064   uint32_t *pdwVal;
00065   pdwVal = (uint32_t *)(wPMABufAddr * 2 + PMAAddr);
00066   for (i = n; i != 0; i--)
00067   {
00068     *(uint16_t*)pbUsrBuf++ = *pdwVal++;
00069     pbUsrBuf++;
00070   }
00071 }
00072 
00073 #endif /* STM32F10X_CL */
00074 /******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/