lpc17xx_emac.c.svn-base

uCOSII_lwip_lpc1768

 **********************************************************************/
void EMAC_SetHashFilter(uint8_t dstMAC_addr[], FunctionalState NewState)
{
	uint32_t *pReg;
	uint32_t tmp;
	int32_t crc;

	// Calculate the CRC from the destination MAC address
	crc = emac_CRCCalc(dstMAC_addr, 6);
	// Extract the value from CRC to get index value for hash filter table
	crc = (crc >> 23) & 0x3F;

	pReg = (crc > 31) ? ((uint32_t *)&LPC_EMAC->HashFilterH) \
								: ((uint32_t *)&LPC_EMAC->HashFilterL);
	tmp = (crc > 31) ? (crc - 32) : crc;
	if (NewState == ENABLE) {
		(*pReg) |= (1UL << tmp);
	} else {
		(*pReg) &= ~(1UL << tmp);
	}
	// Enable Rx Filter
	LPC_EMAC->Command &= ~EMAC_CR_PASS_RX_FILT;
}

/*********************************************************************//**
 * @brief		Enable/Disable Filter mode for each specified type EMAC peripheral
 * @param[in]	ulFilterMode	Filter mode, should be:
 * 								- EMAC_RFC_UCAST_EN: all frames of unicast types
 * 								will be accepted
 * 								- EMAC_RFC_BCAST_EN: broadcast frame will be
 * 								accepted
 * 								- EMAC_RFC_MCAST_EN: all frames of multicast
 * 								types will be accepted
 * 								- EMAC_RFC_UCAST_HASH_EN: The imperfect hash
 * 								filter will be applied to unicast addresses
 * 								- EMAC_RFC_MCAST_HASH_EN: The imperfect hash
 * 								filter will be applied to multicast addresses
 * 								- EMAC_RFC_PERFECT_EN: the destination address
 * 								will be compared with the 6 byte station address
 * 								programmed in the station address by the filter
 * 								- EMAC_RFC_MAGP_WOL_EN: the result of the magic
 * 								packet filter will generate a WoL interrupt when
 * 								there is a match
 * 								- EMAC_RFC_PFILT_WOL_EN: the result of the perfect address
 * 								matching filter and the imperfect hash filter will
 * 								generate a WoL interrupt when there is a match
 * @param[in]	NewState	New State of this command, should be:
 * 								- ENABLE
 * 								- DISABLE
 * @return		None
 **********************************************************************/
void EMAC_SetFilterMode(uint32_t ulFilterMode, FunctionalState NewState)
{
	if (NewState == ENABLE){
		LPC_EMAC->RxFilterCtrl |= ulFilterMode;
	} else {
		LPC_EMAC->RxFilterCtrl &= ~ulFilterMode;
	}
}

/*********************************************************************//**
 * @brief		Get status of Wake On LAN Filter for each specified
 * 				type in EMAC peripheral, clear this status if it is set
 * @param[in]	ulWoLMode	WoL Filter mode, should be:
 * 								- EMAC_WOL_UCAST: unicast frames caused WoL
 * 								- EMAC_WOL_UCAST: broadcast frame caused WoL
 * 								- EMAC_WOL_MCAST: multicast frame caused WoL
 * 								- EMAC_WOL_UCAST_HASH: unicast frame that passes the
 * 								imperfect hash filter caused WoL
 * 								- EMAC_WOL_MCAST_HASH: multicast frame that passes the
 * 								imperfect hash filter caused WoL
 * 								- EMAC_WOL_PERFECT:perfect address matching filter
 * 								caused WoL
 * 								- EMAC_WOL_RX_FILTER: the receive filter caused WoL
 * 								- EMAC_WOL_MAG_PACKET: the magic packet filter caused WoL
 * @return		SET/RESET
 **********************************************************************/
FlagStatus EMAC_GetWoLStatus(uint32_t ulWoLMode)
{
	if (LPC_EMAC->RxFilterWoLStatus & ulWoLMode) {
		LPC_EMAC->RxFilterWoLClear = ulWoLMode;
		return SET;
	} else {
		return RESET;
	}
}


/*********************************************************************//**
 * @brief		Write data to Tx packet data buffer at current index due to
 * 				TxProduceIndex
 * @param[in]	pDataStruct		Pointer to a EMAC_PACKETBUF_Type structure
 * 							data that contain specified information about
 * 							Packet data buffer.
 * @return		None
 **********************************************************************/
void EMAC_WritePacketBuffer(EMAC_PACKETBUF_Type *pDataStruct)
{
	uint32_t idx,len;
	uint32_t *sp,*dp;

	idx = LPC_EMAC->TxProduceIndex;
	sp  = (uint32_t *)pDataStruct->pbDataBuf;
	dp  = (uint32_t *)Tx_Desc[idx].Packet;
	/* Copy frame data to EMAC packet buffers. */
	for (len = (pDataStruct->ulDataLen + 3) >> 2; len; len--) {
		*dp++ = *sp++;
	}
	Tx_Desc[idx].Ctrl = (pDataStruct->ulDataLen - 1) | (EMAC_TCTRL_INT | EMAC_TCTRL_LAST);
}

/*********************************************************************//**
 * @brief		Read data from Rx packet data buffer at current index due
 * 				to RxConsumeIndex
 * @param[in]	pDataStruct		Pointer to a EMAC_PACKETBUF_Type structure
 * 							data that contain specified information about
 * 							Packet data buffer.
 * @return		None
 **********************************************************************/
void EMAC_ReadPacketBuffer(EMAC_PACKETBUF_Type *pDataStruct)
{
	uint32_t idx, len;
	uint32_t *dp, *sp;

	idx = LPC_EMAC->RxConsumeIndex;
	dp = (uint32_t *)pDataStruct->pbDataBuf;
	sp = (uint32_t *)Rx_Desc[idx].Packet;

	if (pDataStruct->pbDataBuf != NULL) {
		for (len = (pDataStruct->ulDataLen + 3) >> 2; len; len--) {
			*dp++ = *sp++;
		}
	}
}

/*********************************************************************//**
 * @brief 		Enable/Disable interrupt for each type in EMAC
 * @param[in]	ulIntType	Interrupt Type, should be:
 * 							- EMAC_INT_RX_OVERRUN: Receive Overrun
 * 							- EMAC_INT_RX_ERR: Receive Error
 * 							- EMAC_INT_RX_FIN: Receive Descriptor Finish
 * 							- EMAC_INT_RX_DONE: Receive Done
 * 							- EMAC_INT_TX_UNDERRUN: Transmit Under-run
 * 							- EMAC_INT_TX_ERR: Transmit Error
 * 							- EMAC_INT_TX_FIN: Transmit descriptor finish
 * 							- EMAC_INT_TX_DONE: Transmit Done
 * 							- EMAC_INT_SOFT_INT: Software interrupt
 * 							- EMAC_INT_WAKEUP: Wakeup interrupt
 * @param[in]	NewState	New State of this function, should be:
 * 							- ENABLE.
 * 							- DISABLE.
 * @return		None
 **********************************************************************/
void EMAC_IntCmd(uint32_t ulIntType, FunctionalState NewState)
{
	if (NewState == ENABLE) {
		LPC_EMAC->IntEnable |= ulIntType;
	} else {
		LPC_EMAC->IntEnable &= ~(ulIntType);
	}
}

/*********************************************************************//**
 * @brief 		Check whether if specified interrupt flag is set or not
 * 				for each interrupt type in EMAC and clear interrupt pending
 * 				if it is set.
 * @param[in]	ulIntType	Interrupt Type, should be:
 * 							- EMAC_INT_RX_OVERRUN: Receive Overrun
 * 							- EMAC_INT_RX_ERR: Receive Error
 * 							- EMAC_INT_RX_FIN: Receive Descriptor Finish
 * 							- EMAC_INT_RX_DONE: Receive Done
 * 							- EMAC_INT_TX_UNDERRUN: Transmit Under-run
 * 							- EMAC_INT_TX_ERR: Transmit Error
 * 							- EMAC_INT_TX_FIN: Transmit descriptor finish
 * 							- EMAC_INT_TX_DONE: Transmit Done
 * 							- EMAC_INT_SOFT_INT: Software interrupt
 * 							- EMAC_INT_WAKEUP: Wakeup interrupt
 * @return		New state of specified interrupt (SET or RESET)
 **********************************************************************/
IntStatus EMAC_IntGetStatus(uint32_t ulIntType)
{
	if (LPC_EMAC->IntStatus & ulIntType) {
		LPC_EMAC->IntClear = ulIntType;
		return SET;
	} else {
		return RESET;
	}
}


/*********************************************************************//**
 * @brief		Check whether if the current RxConsumeIndex is not equal to the
 * 				current RxProduceIndex.
 * @param[in]	None
 * @return		TRUE if they're not equal, otherwise return FALSE
 *
 * Note: In case the RxConsumeIndex is not equal to the RxProduceIndex,
 * it means there're available data has been received. They should be read
 * out and released the Receive Data Buffer by updating the RxConsumeIndex value.
 **********************************************************************/
Bool EMAC_CheckReceiveIndex(void)
{
	if (LPC_EMAC->RxConsumeIndex != LPC_EMAC->RxProduceIndex) {
		return TRUE;
	} else {
		return FALSE;
	}
}


/*********************************************************************//**
 * @brief		Check whether if the current TxProduceIndex is not equal to the
 * 				current RxProduceIndex - 1.
 * @param[in]	None
 * @return		TRUE if they're not equal, otherwise return FALSE
 *
 * Note: In case the RxConsumeIndex is equal to the RxProduceIndex - 1,
 * it means the transmit buffer is available and data can be written to transmit
 * buffer to be sent.
 **********************************************************************/
Bool EMAC_CheckTransmitIndex(void)
{
	uint32_t tmp = LPC_EMAC->TxConsumeIndex -1;
	if (LPC_EMAC->TxProduceIndex == tmp) {
		return FALSE;
	} else {
		return TRUE;
	}
}


/*********************************************************************//**
 * @brief		Get current status value of receive data (due to RxConsumeIndex)
 * @param[in]	ulRxStatType	Received Status type, should be one of following:
 * 							- EMAC_RINFO_CTRL_FRAME: Control Frame
 * 							- EMAC_RINFO_VLAN: VLAN Frame
 * 							- EMAC_RINFO_FAIL_FILT: RX Filter Failed
 * 							- EMAC_RINFO_MCAST: Multicast Frame
 * 							- EMAC_RINFO_BCAST: Broadcast Frame
 * 							- EMAC_RINFO_CRC_ERR: CRC Error in Frame
 * 							- EMAC_RINFO_SYM_ERR: Symbol Error from PHY
 * 							- EMAC_RINFO_LEN_ERR: Length Error
 * 							- EMAC_RINFO_RANGE_ERR: Range error(exceeded max size)
 * 							- EMAC_RINFO_ALIGN_ERR: Alignment error
 * 							- EMAC_RINFO_OVERRUN: Receive overrun
 * 							- EMAC_RINFO_NO_DESCR: No new Descriptor available
 * 							- EMAC_RINFO_LAST_FLAG: last Fragment in Frame
 * 							- EMAC_RINFO_ERR: Error Occurred (OR of all error)
 * @return		Current value of receive data (due to RxConsumeIndex)
 **********************************************************************/
FlagStatus EMAC_CheckReceiveDataStatus(uint32_t ulRxStatType)
{
	uint32_t idx;
	idx = LPC_EMAC->RxConsumeIndex;
	return (((Rx_Stat[idx].Info) & ulRxStatType) ? SET : RESET);
}


/*********************************************************************//**
 * @brief		Get size of current Received data in received buffer (due to
 * 				RxConsumeIndex)
 * @param[in]	None
 * @return		Size of received data
 **********************************************************************/
uint32_t EMAC_GetReceiveDataSize(void)
{
	uint32_t idx;
	idx =LPC_EMAC->RxConsumeIndex;
	return ((Rx_Stat[idx].Info) & EMAC_RINFO_SIZE);
}

/*********************************************************************//**
 * @brief		Increase the RxConsumeIndex (after reading the Receive buffer
 * 				to release the Receive buffer) and wrap-around the index if
 * 				it reaches the maximum Receive Number
 * @param[in]	None
 * @return		None
 **********************************************************************/
void EMAC_UpdateRxConsumeIndex(void)
{
	// Get current Rx consume index
	uint32_t idx = LPC_EMAC->RxConsumeIndex;

	/* Release frame from EMAC buffer */
	if (++idx == EMAC_NUM_RX_FRAG) idx = 0;
	LPC_EMAC->RxConsumeIndex = idx;
}

/*********************************************************************//**
 * @brief		Increase the TxProduceIndex (after writting to the Transmit buffer
 * 				to enable the Transmit buffer) and wrap-around the index if
 * 				it reaches the maximum Transmit Number
 * @param[in]	None
 * @return		None
 **********************************************************************/
void EMAC_UpdateTxProduceIndex(void)
{
	// Get current Tx produce index
	uint32_t idx = LPC_EMAC->TxProduceIndex;

	/* Start frame transmission */
	if (++idx == EMAC_NUM_TX_FRAG) idx = 0;
	LPC_EMAC->TxProduceIndex = idx;
}


/**
 * @}
 */

#endif /* _EMAC */

/**
 * @}
 */

/* --------------------------------- End Of File ------------------------------ */