72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : usb_mem.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/08/08
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* Description : Utility functions for memory transfers to/from PMA
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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#include "usb_lib.h"
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/*******************************************************************************
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* @fn UserToPMABufferCopy
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*
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* @brief Copy a buffer from user memory area to packet memory area (PMA)
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*
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* @param 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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*
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* @param 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;
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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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* @fn PMAToUserBufferCopy
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*
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* @brief Copy a buffer from user memory area to packet memory area (PMA)
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*
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* @param 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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*
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* @param 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;
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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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