flight/pios/stm32f10x/libraries/STM32_USB-FS-Device_Driver/src/usb_mem.c

   1 /******************** (C) COPYRIGHT 2010 STMicroelectronics ********************
   2 * File Name          : usb_mem.c
   3 * Author             : MCD Application Team
   4 * Version            : V3.2.1
   5 * Date               : 07/05/2010
   6 * Description        : Utility functions for memory transfers to/from PMA
   7 ********************************************************************************
   8 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
   9 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
  10 * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
  11 * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
  12 * CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
  13 * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  14 *******************************************************************************/
  15 #ifndef STM32F10X_CL
  16
  17 /* Includes ------------------------------------------------------------------*/
  18 #include "usb_lib.h"
  19
  20 /* Private typedef -----------------------------------------------------------*/
  21 /* Private define ------------------------------------------------------------*/
  22 /* Private macro -------------------------------------------------------------*/
  23 /* Private variables ---------------------------------------------------------*/
  24 /* Extern variables ----------------------------------------------------------*/
  25 /* Private function prototypes -----------------------------------------------*/
  26 /* Private functions ---------------------------------------------------------*/
  27 /*******************************************************************************
  28 * Function Name  : UserToPMABufferCopy
  29 * Description    : Copy a buffer from user memory area to packet memory area (PMA)
  30 * Input          : - pbUsrBuf: pointer to user memory area.
  31 *                  - wPMABufAddr: address into PMA.
  32 *                  - wNBytes: no. of bytes to be copied.
  33 * Output         : None.
  34 * Return         : None .
  35 *******************************************************************************/
  36 void UserToPMABufferCopy(const uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
  37 {
  38   uint32_t n = (wNBytes + 1) >> 1;   /* n = (wNBytes + 1) / 2 */
  39   uint32_t i, temp1, temp2;
  40   uint16_t *pdwVal;
  41   pdwVal = (uint16_t *)(wPMABufAddr * 2 + PMAAddr);
  42   for (i = n; i != 0; i--)
  43   {
  44     temp1 = (uint16_t) * pbUsrBuf;
  45     pbUsrBuf++;
  46     temp2 = temp1 | (uint16_t) * pbUsrBuf << 8;
  47     *pdwVal++ = temp2;
  48     pdwVal++;
  49     pbUsrBuf++;
  50   }
  51 }
  52 /*******************************************************************************
  53 * Function Name  : PMAToUserBufferCopy
  54 * Description    : Copy a buffer from user memory area to packet memory area (PMA)
  55 * Input          : - pbUsrBuf    = pointer to user memory area.
  56 *                  - wPMABufAddr = address into PMA.
  57 *                  - wNBytes     = no. of bytes to be copied.
  58 * Output         : None.
  59 * Return         : None.
  60 *******************************************************************************/
  61 void PMAToUserBufferCopy(uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
  62 {
  63   uint32_t n = (wNBytes + 1) >> 1;/* /2*/
  64   uint32_t i;
  65   uint32_t *pdwVal;
  66   pdwVal = (uint32_t *)(wPMABufAddr * 2 + PMAAddr);
  67   for (i = n; i != 0; i--)
  68   {
  69     *(uint16_t*)pbUsrBuf++ = *pdwVal++;
  70     pbUsrBuf++;
  71   }
  72 }
  73
  74 #endif /* STM32F10X_CL */
  75 /******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/