от кода в циклах у меня шерсть дыбом встает. у компиллера кстате тоже.
это можно написать по простому а не так заумно?
сижу - гадаю, тодлько у меня отторжение вызовет это или нет

есть ощущение что как пойму че тут имели ввиду c указателями перепишу на асме

по логике всегото - перекопировать байты из одного место в другое.. но как витиевато, с двумя временными переменными! изготовлено то...
Код
/*******************************************************************************
* 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, temp2;
uint16_t *pdwVal;
pdwVal = (uint16_t *)(wPMABufAddr * 2 + PMAAddr);
for (i = n; i != 0; i--)
{
temp1 = (uint16_t) * pbUsrBuf;
pbUsrBuf++;
temp2 = temp1 | (uint16_t) * pbUsrBuf << 8;
*pdwVal++ = temp2;
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++;
}
}
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
* 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, temp2;
uint16_t *pdwVal;
pdwVal = (uint16_t *)(wPMABufAddr * 2 + PMAAddr);
for (i = n; i != 0; i--)
{
temp1 = (uint16_t) * pbUsrBuf;
pbUsrBuf++;
temp2 = temp1 | (uint16_t) * pbUsrBuf << 8;
*pdwVal++ = temp2;
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++;
}
}
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/