diff options
Diffstat (limited to 'uc_str912/prj_blinky_complex_startup/src/usb_mem.c')
| -rw-r--r-- | uc_str912/prj_blinky_complex_startup/src/usb_mem.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/uc_str912/prj_blinky_complex_startup/src/usb_mem.c b/uc_str912/prj_blinky_complex_startup/src/usb_mem.c new file mode 100644 index 0000000..5bb2bda --- /dev/null +++ b/uc_str912/prj_blinky_complex_startup/src/usb_mem.c @@ -0,0 +1,85 @@ +/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
+* File Name : usb_mem.c
+* Author : MCD Application Team
+* Date First Issued : 05/18/2006 : Version 1.0
+* Description : utility functions for memory transfers
+********************************************************************************
+* History:
+* 05/24/2006 : Version 1.1
+* 05/18/2006 : Version 1.0
+********************************************************************************
+* THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
+* CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+*******************************************************************************/
+
+#include "usb_lib.h"
+#include "usb_mem.h"
+
+/*******************************************************************************
+* Function Name : UserToPMABufferCopy
+* Description : Copy a buffer from user memory to packet memory area
+* Input : - pbUsrBuf = pointer to user memory area
+* - wPMABufAddr = address into PMA
+* - wNBytes = number of bytes to be copied
+* Output : None
+* Return value : None
+*******************************************************************************/
+void UserToPMABufferCopy(BYTE *pbUsrBuf,WORD wPMABufAddr, WORD wNBytes)
+{
+ DWORD *pdwVal;
+
+ DWORD wTra, i;
+ union
+ {
+ BYTE *bTra;
+ DWORD *wTra;
+ }pBuf;
+ int wNTrasf=wNBytes;
+
+ pdwVal= (DWORD *)(PMAAddr+(DWORD)((wPMABufAddr)));
+ pBuf.wTra = &wTra;
+ for(i=0;i < wNTrasf;)
+ {
+ *(pBuf.bTra ) = *pbUsrBuf++;
+ i++;
+ *(pBuf.bTra+1) = *pbUsrBuf++;
+ i++;
+ *(pBuf.bTra+2) = *pbUsrBuf++;
+ i++;
+ *(pBuf.bTra+3) = *pbUsrBuf++;
+ i++;
+ *pdwVal = wTra;
+ pdwVal++;
+ }
+} /* UserToPMABufferCopy */
+
+/*******************************************************************************
+* Function Name : PMAToUserBufferCopy
+* Description : Copy a buffer from packet memory area to user memory
+* Input : - pbUsrBuf = pointer to user memory area
+* - wPMABufAddr = address into PMA
+* - wNBytes = number of bytes to be copied
+* Output : None
+* Return value : None
+*******************************************************************************/
+void PMAToUserBufferCopy(BYTE *pbUsrBuf,WORD wPMABufAddr, WORD wNBytes)
+{
+ BYTE *pbVal;
+ WORD wNTrasf=wNBytes;
+ if((wNBytes) == 0) return;
+ pbVal = (BYTE *)(PMAAddr + wPMABufAddr);
+ while(1)
+ {
+ *pbUsrBuf++ = *pbVal++;
+ if((--wNTrasf) == 0) return;
+ *pbUsrBuf++ = *pbVal++;
+ if((--wNTrasf) == 0) return;
+ }/* while */
+} /* PMAToUserBufferCopy */
+
+
+
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