74 lines
3.3 KiB
C
74 lines
3.3 KiB
C
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
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* File Name : usb_mem.c
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* Author : MCD Application Team
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* Version : V2.2.1
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* Date : 09/22/2008
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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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/* 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(u8 *pbUsrBuf, u16 wPMABufAddr, u16 wNBytes)
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{
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u32 n = (wNBytes + 1) >> 1; /* n = (wNBytes + 1) / 2 */
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u32 i, temp1, temp2;
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u16 *pdwVal;
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pdwVal = (u16 *)(wPMABufAddr * 2 + PMAAddr);
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for (i = n; i != 0; i--)
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{
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temp1 = (u16) * pbUsrBuf;
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pbUsrBuf++;
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temp2 = temp1 | (u16) * 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(u8 *pbUsrBuf, u16 wPMABufAddr, u16 wNBytes)
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{
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u32 n = (wNBytes + 1) >> 1;/* /2*/
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u32 i;
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u32 *pdwVal;
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pdwVal = (u32 *)(wPMABufAddr * 2 + PMAAddr);
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for (i = n; i != 0; i--)
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{
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*(u16*)pbUsrBuf++ = *pdwVal++;
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pbUsrBuf++;
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}
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}
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/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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