76 lines
3.5 KiB
C
76 lines
3.5 KiB
C
/******************** (C) COPYRIGHT 2011 STMicroelectronics ********************
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* File Name : usb_mem.c
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* Author : MCD Application Team
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* Version : V3.3.0
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* Date : 21-March-2011
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* Description : Utility functions for memory transfers to/from PMA
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********************************************************************************
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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#ifndef STM32F10X_CL
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/* Includes ------------------------------------------------------------------*/
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#include "usb_lib.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Extern variables ----------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/*******************************************************************************
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* Function Name : UserToPMABufferCopy
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* Description : Copy a buffer from user memory area to packet memory area (PMA)
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* Input : - pbUsrBuf: pointer to user memory area.
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* - wPMABufAddr: address into PMA.
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* - wNBytes: no. of bytes to be copied.
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* Output : None.
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* Return : None .
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*******************************************************************************/
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void UserToPMABufferCopy(uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
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{
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uint32_t n = (wNBytes + 1) >> 1; /* n = (wNBytes + 1) / 2 */
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uint32_t i, temp1, temp2;
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uint16_t *pdwVal;
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pdwVal = (uint16_t *)(wPMABufAddr * 2 + PMAAddr);
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for (i = n; i != 0; i--)
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{
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temp1 = (uint16_t) * pbUsrBuf;
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pbUsrBuf++;
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temp2 = temp1 | (uint16_t) * pbUsrBuf << 8;
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*pdwVal++ = temp2;
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pdwVal++;
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pbUsrBuf++;
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}
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}
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/*******************************************************************************
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* Function Name : PMAToUserBufferCopy
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* Description : Copy a buffer from user memory area to packet memory area (PMA)
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* Input : - pbUsrBuf = pointer to user memory area.
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* - wPMABufAddr = address into PMA.
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* - wNBytes = no. of bytes to be copied.
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* Output : None.
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* Return : None.
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*******************************************************************************/
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void PMAToUserBufferCopy(uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
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{
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uint32_t n = (wNBytes + 1) >> 1;/* /2*/
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uint32_t i;
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uint32_t *pdwVal;
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pdwVal = (uint32_t *)(wPMABufAddr * 2 + PMAAddr);
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for (i = n; i != 0; i--)
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{
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*(uint16_t*)pbUsrBuf++ = *pdwVal++;
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pbUsrBuf++;
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}
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}
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#endif /* STM32F10X_CL */
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/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
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