Diff: stm_usb_fs_lib/src/usb_mem.c
- Revision:
- 0:8f0d870509fe
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/stm_usb_fs_lib/src/usb_mem.c Mon Sep 04 12:04:13 2017 +0000
@@ -0,0 +1,74 @@
+/******************** (C) COPYRIGHT 2010 STMicroelectronics ********************
+* File Name : usb_mem.c
+* Author : MCD Application Team
+* Version : V3.2.1
+* Date : 07/05/2010
+* Description : Utility functions for memory transfers to/from PMA
+********************************************************************************
+* THE PRESENT FIRMWARE 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 FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
+* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+*******************************************************************************/
+#ifndef STM32F10X_CL
+
+/* Includes ------------------------------------------------------------------*/
+#include "usb_lib.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Extern variables ----------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+/*******************************************************************************
+* Function Name : UserToPMABufferCopy
+* Description : Copy a buffer from user memory area to packet memory area (PMA)
+* Input : - pbUsrBuf: pointer to user memory area.
+* - wPMABufAddr: address into PMA.
+* - wNBytes: no. of bytes to be copied.
+* Output : None.
+* Return : None .
+*******************************************************************************/
+void UserToPMABufferCopy(uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
+{
+ uint32_t n = (wNBytes + 1) >> 1; /* n = (wNBytes + 1) / 2 */
+ uint32_t i, temp1;
+ uint16_t *pdwVal;
+ pdwVal = (uint16_t *)(wPMABufAddr * 2 + PMAAddr);
+ for (i = n; i != 0; i--)
+ {
+ temp1 = (uint16_t) * pbUsrBuf;
+ pbUsrBuf++;
+ *pdwVal++ = temp1 | (uint16_t) * pbUsrBuf << 8;
+ pdwVal++;
+ pbUsrBuf++;
+ }
+}
+/*******************************************************************************
+* Function Name : PMAToUserBufferCopy
+* Description : Copy a buffer from user memory area to packet memory area (PMA)
+* Input : - pbUsrBuf = pointer to user memory area.
+* - wPMABufAddr = address into PMA.
+* - wNBytes = no. of bytes to be copied.
+* Output : None.
+* Return : None.
+*******************************************************************************/
+void PMAToUserBufferCopy(uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
+{
+ uint32_t n = (wNBytes + 1) >> 1;/* /2*/
+ uint32_t i;
+ uint32_t *pdwVal;
+ pdwVal = (uint32_t *)(wPMABufAddr * 2 + PMAAddr);
+ for (i = n; i != 0; i--)
+ {
+ *(uint16_t*)pbUsrBuf++ = *pdwVal++;
+ pbUsrBuf++;
+ }
+}
+
+#endif /* STM32F10X_CL */
+/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/