//*****************************************************************************

//

//! \file w5500.h

//! \brief W5500 HAL Header File.

//! \version 1.0.0

//! \date 2013/10/21

//! \par  Revision history

//!       <2013/10/21> 1st Release

//! \author MidnightCow

//! \copyright

//!

//! Copyright (c)  2013, WIZnet Co., LTD.

//! All rights reserved.

//! 

//! Redistribution and use in source and binary forms, with or without 

//! modification, are permitted provided that the following conditions 

//! are met: 

//! 

//!     * Redistributions of source code must retain the above copyright 

//! notice, this list of conditions and the following disclaimer. 

//!     * Redistributions in binary form must reproduce the above copyright

//! notice, this list of conditions and the following disclaimer in the

//! documentation and/or other materials provided with the distribution. 

//!     * Neither the name of the <ORGANIZATION> nor the names of its 

//! contributors may be used to endorse or promote products derived 

//! from this software without specific prior written permission. 

//! 

//! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

//! AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 

//! IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

//! ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 

//! LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 

//! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 

//! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

//! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 

//! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 

//! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 

//! THE POSSIBILITY OF SUCH DAMAGE.

//

//*****************************************************************************



#ifndef  _W5500_H_

#define  _W5500_H_



#include <stdint.h>

#include "Ethernet/wizchip_conf.h"



#define _W5500_IO_BASE_              0x00000000



#define _W5500_SPI_READ_			   (0x00 << 2) //< SPI interface Read operation in Control Phase

#define _W5500_SPI_WRITE_			   (0x01 << 2) //< SPI interface Write operation in Control Phase



#define WIZCHIP_CREG_BLOCK          0x00 	//< Common register block

#define WIZCHIP_SREG_BLOCK(N)       (1+4*N) //< Socket N register block

#define WIZCHIP_TXBUF_BLOCK(N)      (2+4*N) //< Socket N Tx buffer address block

#define WIZCHIP_RXBUF_BLOCK(N)      (3+4*N) //< Socket N Rx buffer address block



#define WIZCHIP_OFFSET_INC(ADDR, N)    (ADDR + (N<<8)) //< Increase offset address





///////////////////////////////////////

// Definition For Legacy Chip Driver //

///////////////////////////////////////

#define IINCHIP_READ(ADDR)                WIZCHIP_READ(ADDR)               ///< The defined for legacy chip driver

#define IINCHIP_WRITE(ADDR,VAL)           WIZCHIP_WRITE(ADDR,VAL)          ///< The defined for legacy chip driver

#define IINCHIP_READ_BUF(ADDR,BUF,LEN)    WIZCHIP_READ_BUF(ADDR,BUF,LEN)   ///< The defined for legacy chip driver

#define IINCHIP_WRITE_BUF(ADDR,BUF,LEN)   WIZCHIP_WRITE(ADDR,BUF,LEN)      ///< The defined for legacy chip driver



//////////////////////////////

//--------------------------  defgroup ---------------------------------

/**

 * @defgroup W5500 W5500

 *

 * @brief WHIZCHIP register defines and I/O functions of @b W5500.

 *

 * - @ref WIZCHIP_register : @ref Common_register_group and @ref Socket_register_group

 * - @ref WIZCHIP_IO_Functions : @ref Basic_IO_function, @ref Common_register_access_function and @ref Socket_register_access_function

 */

 

 

/**

 * @defgroup WIZCHIP_register WIZCHIP register

 * @ingroup W5500

 *

 * @brief WHIZCHIP register defines register group of @b W5500.

 *

 * - @ref Common_register_group : Common register group

 * - @ref Socket_register_group : \c SOCKET n register group

 */





/**

 * @defgroup WIZCHIP_IO_Functions WIZCHIP I/O functions

 * @ingroup W5500

 *

 * @brief This supports the basic I/O functions for @ref WIZCHIP_register.

 *

 * - <b> Basic I/O function </b> \n

 *   WIZCHIP_READ(), WIZCHIP_WRITE(), WIZCHIP_READ_BUF(), WIZCHIP_WRITE_BUF() \n\n

 *

 * - @ref Common_register_group <b>access functions</b> \n

 * 	-# @b Mode \n

 *    getMR(), setMR()

 * 	-# @b Interrupt \n

 *    getIR(), setIR(), getIMR(), setIMR(), getSIR(), setSIR(), getSIMR(), setSIMR(), getINTLEVEL(), setINTLEVEL()

 * 	-# <b> Network Information </b> \n

 *    getSHAR(), setSHAR(), getGAR(), setGAR(), getSUBR(), setSUBR(), getSIPR(), setSIPR()

 * 	-# @b Retransmission \n

 *    getRCR(), setRCR(), getRTR(), setRTR()

 * 	-# @b PPPoE \n

 *    getPTIMER(), setPTIMER(), getPMAGIC(), getPMAGIC(), getPSID(), setPSID(), getPHAR(), setPHAR(), getPMRU(), setPMRU()

 * 	-# <b> ICMP packet </b>\n

 *    getUIPR(), getUPORTR()

 * 	-# @b etc. \n

 *    getPHYCFGR(), setPHYCFGR(), getVERSIONR() \n\n

 *

 * - \ref Socket_register_group <b>access functions</b> \n

 *   -# <b> SOCKET control</b> \n

 *      getSn_MR(), setSn_MR(), getSn_CR(), setSn_CR(), getSn_IMR(), setSn_IMR(), getSn_IR(), setSn_IR()

 *   -# <b> SOCKET information</b> \n

 *      getSn_SR(), getSn_DHAR(), setSn_DHAR(), getSn_PORT(), setSn_PORT(), getSn_DIPR(), setSn_DIPR(), getSn_DPORT(), setSn_DPORT()

 *      getSn_MSSR(), setSn_MSSR()

 *   -# <b> SOCKET communication </b> \n

 *      getSn_RXBUF_SIZE(), setSn_RXBUF_SIZE(), getSn_TXBUF_SIZE(), setSn_TXBUF_SIZE() \n

 *      getSn_TX_RD(), getSn_TX_WR(), setSn_TX_WR() \n

 *      getSn_RX_RD(), setSn_RX_RD(), getSn_RX_WR() \n

 *      getSn_TX_FSR(), getSn_RX_RSR(), getSn_KPALVTR(), setSn_KPALVTR()

 *   -# <b> IP header field </b> \n

 *      getSn_FRAG(), setSn_FRAG(),  getSn_TOS(), setSn_TOS() \n

 *      getSn_TTL(), setSn_TTL()

 */







/**

 * @defgroup Common_register_group Common register

 * @ingroup WIZCHIP_register

 *

 * @brief Common register group\n

 * It set the basic for the networking\n

 * It set the configuration such as interrupt, network information, ICMP, etc.

 * @details

 * @sa MR : Mode register.

 * @sa GAR, SUBR, SHAR, SIPR

 * @sa INTLEVEL, IR, IMR, SIR, SIMR : Interrupt.

 * @sa RTR, RCR : Data retransmission.

 * @sa PTIMER, PMAGIC, PHAR, PSID, PMRU : PPPoE.

 * @sa UIPR, UPORTR : ICMP message.

 * @sa PHYCFGR, VERSIONR : etc.

 */

 

  

 

/**

 * @defgroup Socket_register_group Socket register

 * @ingroup WIZCHIP_register

 *

 * @brief Socket register group.\n

 * Socket register configures and control SOCKETn which is necessary to data communication.

 * @details

 * @sa Sn_MR, Sn_CR, Sn_IR, Sn_IMR : SOCKETn Control

 * @sa Sn_SR, Sn_PORT, Sn_DHAR, Sn_DIPR, Sn_DPORT : SOCKETn Information

 * @sa Sn_MSSR, Sn_TOS, Sn_TTL, Sn_KPALVTR, Sn_FRAG : Internet protocol.

 * @sa Sn_RXBUF_SIZE, Sn_TXBUF_SIZE, Sn_TX_FSR, Sn_TX_RD, Sn_TX_WR, Sn_RX_RSR, Sn_RX_RD, Sn_RX_WR : Data communication

 */

 

 

 

 /**

 * @defgroup Basic_IO_function Basic I/O function

 * @ingroup WIZCHIP_IO_Functions

 * @brief These are basic input/output functions to read values from register or write values to register.

 */



/**

 * @defgroup Common_register_access_function Common register access functions

 * @ingroup WIZCHIP_IO_Functions

 * @brief These are functions to access <b>common registers</b>.

 */



/**

 * @defgroup Socket_register_access_function Socket register access functions

 * @ingroup WIZCHIP_IO_Functions

 * @brief These are functions to access <b>socket registers</b>.

 */

 

//------------------------------- defgroup end --------------------------------------------

//----------------------------- W5500 Common Registers IOMAP -----------------------------

/**

 * @ingroup Common_register_group

 * @brief Mode Register address(R/W)\n

 * @ref MR is used for S/W reset, ping block mode, PPPoE mode and etc.

 * @details Each bit of @ref MR defined as follows.

 * <table>

 * 		<tr>  <td>7</td> <td>6</td> <td>5</td> <td>4</td> <td>3</td> <td>2</td> <td>1</td> <td>0</td>   </tr>

 * 		<tr>  <td>RST</td> <td>Reserved</td> <td>WOL</td> <td>PB</td> <td>PPPoE</td> <td>Reserved</td> <td>FARP</td> <td>Reserved</td> </tr>

 * </table>

 * - \ref MR_RST		 	: Reset

 * - \ref MR_WOL       		: Wake on LAN

 * - \ref MR_PB         	: Ping block

 * - \ref MR_PPPOE      	: PPPoE mode

 * - \ref MR_FARP			: Force ARP mode

 */

#define MR                 (_W5500_IO_BASE_ + (0x0000 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Gateway IP Register address(R/W)

 * @details @ref GAR configures the default gateway address.

 */

#define GAR                (_W5500_IO_BASE_ + (0x0001 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Subnet mask Register address(R/W)

 * @details @ref SUBR configures the subnet mask address.

 */

#define SUBR               (_W5500_IO_BASE_ + (0x0005 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Source MAC Register address(R/W)

 * @details @ref SHAR configures the source hardware address.

 */

#define SHAR               (_W5500_IO_BASE_ + (0x0009 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Source IP Register address(R/W)

 * @details @ref SIPR configures the source IP address.

 */

#define SIPR               (_W5500_IO_BASE_ + (0x000F << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Set Interrupt low level timer register address(R/W)

 * @details @ref INTLEVEL configures the Interrupt Assert Time.

 */

#define INTLEVEL           (_W5500_IO_BASE_ + (0x0013 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Interrupt Register(R/W)

 * @details @ref IR indicates the interrupt status. Each bit of @ref IR will be still until the bit will be written to by the host.

 * If @ref IR is not equal to x00 INTn PIN is asserted to low until it is x00\n\n

 * Each bit of @ref IR defined as follows.

 * <table>

 * 		<tr>  <td>7</td> <td>6</td> <td>5</td> <td>4</td> <td>3</td> <td>2</td> <td>1</td> <td>0</td>   </tr>

 * 		<tr>  <td>CONFLICT</td> <td>UNREACH</td> <td>PPPoE</td> <td>MP</td> <td>Reserved</td> <td>Reserved</td> <td>Reserved</td> <td>Reserved</td> </tr>

 * </table>

 * - \ref IR_CONFLICT : IP conflict

 * - \ref IR_UNREACH  : Destination unreachable

 * - \ref IR_PPPoE	  : PPPoE connection close

 * - \ref IR_MP		  : Magic packet

 */

#define IR                 (_W5500_IO_BASE_ + (0x0015 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Interrupt mask register(R/W)

 * @details @ref IMR is used to mask interrupts. Each bit of @ref IMR corresponds to each bit of @ref IR.

 * When a bit of @ref IMR is and the corresponding bit of @ref IR is  an interrupt will be issued. In other words,

 * if a bit of @ref IMR is  an interrupt will not be issued even if the corresponding bit of @ref IR is \n\n

 * Each bit of @ref IMR defined as the following.

 * <table>

 * 		<tr>  <td>7</td> <td>6</td> <td>5</td> <td>4</td> <td>3</td> <td>2</td> <td>1</td> <td>0</td>   </tr>

 * 		<tr>  <td>IM_IR7</td> <td>IM_IR6</td> <td>IM_IR5</td> <td>IM_IR4</td> <td>Reserved</td> <td>Reserved</td> <td>Reserved</td> <td>Reserved</td> </tr>

 * </table>

 * - \ref IM_IR7 : IP Conflict Interrupt Mask

 * - \ref IM_IR6 : Destination unreachable Interrupt Mask

 * - \ref IM_IR5 : PPPoE Close Interrupt Mask

 * - \ref IM_IR4 : Magic Packet Interrupt Mask

 */

#define IMR                (_W5500_IO_BASE_ + (0x0016 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Socket Interrupt Register(R/W)

 * @details @ref SIR indicates the interrupt status of Socket.\n

 * Each bit of @ref SIR be still until @ref Sn_IR is cleared by the host.\n

 * If @ref Sn_IR is not equal to x00 the n-th bit of @ref SIR is and INTn PIN is asserted until @ref SIR is x00 */

#define SIR                (_W5500_IO_BASE_ + (0x0017 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Socket Interrupt Mask Register(R/W)

 * @details Each bit of @ref SIMR corresponds to each bit of @ref SIR.

 * When a bit of @ref SIMR is and the corresponding bit of @ref SIR is  Interrupt will be issued.

 * In other words, if a bit of @ref SIMR is  an interrupt will be not issued even if the corresponding bit of @ref SIR is 

 */

#define SIMR               (_W5500_IO_BASE_ + (0x0018 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Timeout register address( 1 is 100us )(R/W)

 * @details @ref RTR configures the retransmission timeout period. The unit of timeout period is 100us and the default of @ref RTR is x07D0or 000

 * And so the default timeout period is 200ms(100us X 2000). During the time configured by @ref RTR, W5500 waits for the peer response

 * to the packet that is transmitted by \ref Sn_CR (CONNECT, DISCON, CLOSE, SEND, SEND_MAC, SEND_KEEP command).

 * If the peer does not respond within the @ref RTR time, W5500 retransmits the packet or issues timeout.

 */

#define RTR                (_W5500_IO_BASE_ + (0x0019 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Retry count register(R/W)

 * @details @ref RCR configures the number of time of retransmission.

 * When retransmission occurs as many as ref RCR+1 Timeout interrupt is issued (@ref Sn_IR[TIMEOUT] = .

 */

#define RCR                (_W5500_IO_BASE_ + (0x001B << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief PPP LCP Request Timer register  in PPPoE mode(R/W)

 * @details @ref PTIMER configures the time for sending LCP echo request. The unit of time is 25ms.

 */

#define PTIMER             (_W5500_IO_BASE_ + (0x001C << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief PPP LCP Magic number register  in PPPoE mode(R/W)

 * @details @ref PMAGIC configures the 4bytes magic number to be used in LCP negotiation.

 */

#define PMAGIC             (_W5500_IO_BASE_ + (0x001D << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief PPP Destination MAC Register address(R/W)

 * @details @ref PHAR configures the PPPoE server hardware address that is acquired during PPPoE connection process.

 */

#define PHAR                (_W5500_IO_BASE_ + (0x001E << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief PPP Session Identification Register(R/W)

 * @details @ref PSID configures the PPPoE sever session ID acquired during PPPoE connection process.

 */

#define PSID               (_W5500_IO_BASE_ + (0x0024 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief PPP Maximum Segment Size(MSS) register(R/W)

 * @details @ref PMRU configures the maximum receive unit of PPPoE.

 */

#define PMRU               (_W5500_IO_BASE_ + (0x0026 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Unreachable IP register address in UDP mode(R)

 * @details W5500 receives an ICMP packet(Destination port unreachable) when data is sent to a port number

 * which socket is not open and @ref UNREACH bit of @ref IR becomes and @ref UIPR & @ref UPORTR indicates

 * the destination IP address & port number respectively.

 */

#define UIPR               (_W5500_IO_BASE_ + (0x0028 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief Unreachable Port register address in UDP mode(R)

 * @details W5500 receives an ICMP packet(Destination port unreachable) when data is sent to a port number

 * which socket is not open and @ref UNREACH bit of @ref IR becomes and @ref UIPR & @ref UPORTR

 * indicates the destination IP address & port number respectively.

 */

#define UPORTR              (_W5500_IO_BASE_ + (0x002C << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief PHY Status Register(R/W)

 * @details @ref PHYCFGR configures PHY operation mode and resets PHY. In addition, @ref PHYCFGR indicates the status of PHY such as duplex, Speed, Link.

 */

#define PHYCFGR            (_W5500_IO_BASE_ + (0x002E << 8) + (WIZCHIP_CREG_BLOCK << 3))



// Reserved			         (_W5500_IO_BASE_ + (0x002F << 8) + (WIZCHIP_CREG_BLOCK << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0030 << 8) + (WIZCHIP_CREG_BLOCK << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0031 << 8) + (WIZCHIP_CREG_BLOCK << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0032 << 8) + (WIZCHIP_CREG_BLOCK << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0033 << 8) + (WIZCHIP_CREG_BLOCK << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0034 << 8) + (WIZCHIP_CREG_BLOCK << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0035 << 8) + (WIZCHIP_CREG_BLOCK << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0036 << 8) + (WIZCHIP_CREG_BLOCK << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0037 << 8) + (WIZCHIP_CREG_BLOCK << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0038 << 8) + (WIZCHIP_CREG_BLOCK << 3))



/**

 * @ingroup Common_register_group

 * @brief chip version register address(R)

 * @details @ref VERSIONR always indicates the W5500 version as @b 0x04.

 */

#define VERSIONR           (_W5500_IO_BASE_ + (0x0039 << 8) + (WIZCHIP_CREG_BLOCK << 3))





//----------------------------- W5500 Socket Registers IOMAP -----------------------------

/**

 * @ingroup Socket_register_group

 * @brief socket Mode register(R/W)

 * @details @ref Sn_MR configures the option or protocol type of Socket n.\n\n

 * Each bit of @ref Sn_MR defined as the following.

 * <table>

 * 		<tr>  <td>7</td> <td>6</td> <td>5</td> <td>4</td> <td>3</td> <td>2</td> <td>1</td> <td>0</td>   </tr>

 * 		<tr>  <td>MULTI/MFEN</td> <td>BCASTB</td> <td>ND/MC/MMB</td> <td>UCASTB/MIP6B</td> <td>Protocol[3]</td> <td>Protocol[2]</td> <td>Protocol[1]</td> <td>Protocol[0]</td> </tr>

 * </table>

 * - @ref Sn_MR_MULTI	: Support UDP Multicasting

 * - @ref Sn_MR_BCASTB	: Broadcast block <b>in UDP Multicasting</b>

 * - @ref Sn_MR_ND		: No Delayed Ack(TCP) flag

 * - @ref Sn_MR_MC   	: IGMP version used <b>in UDP mulitcasting</b>

 * - @ref Sn_MR_MMB    	: Multicast Blocking <b>in @ref Sn_MR_MACRAW mode</b>

 * - @ref Sn_MR_UCASTB	: Unicast Block <b>in UDP Multicating</b>

 * - @ref Sn_MR_MIP6B   : IPv6 packet Blocking <b>in @ref Sn_MR_MACRAW mode</b>

 * - <b>Protocol</b>

 * <table>

 * 		<tr>   <td><b>Protocol[3]</b></td> <td><b>Protocol[2]</b></td> <td><b>Protocol[1]</b></td> <td><b>Protocol[0]</b></td> <td>@b Meaning</td>   </tr>

 * 		<tr>   <td>0</td> <td>0</td> <td>0</td> <td>0</td> <td>Closed</td>   </tr>

 * 		<tr>   <td>0</td> <td>0</td> <td>0</td> <td>1</td> <td>TCP</td>   </tr>

 * 		<tr>   <td>0</td> <td>0</td> <td>1</td> <td>0</td> <td>UDP</td>   </tr>

 * 		<tr>   <td>0</td> <td>1</td> <td>0</td> <td>0</td> <td>MACRAW</td>   </tr>

 * </table>

 *	- @ref Sn_MR_MACRAW	: MAC LAYER RAW SOCK \n

 *  - @ref Sn_MR_UDP		: UDP

 *  - @ref Sn_MR_TCP		: TCP

 *  - @ref Sn_MR_CLOSE	: Unused socket

 *  @note MACRAW mode should be only used in Socket 0.

 */

#define Sn_MR(N)           (_W5500_IO_BASE_ + (0x0000 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Socket command register(R/W)

 * @details This is used to set the command for Socket n such as OPEN, CLOSE, CONNECT, LISTEN, SEND, and RECEIVE.\n

 * After W5500 accepts the command, the @ref Sn_CR register is automatically cleared to 0x00.

 * Even though @ref Sn_CR is cleared to 0x00, the command is still being processed.\n

 * To check whether the command is completed or not, please check the @ref Sn_IR or @ref Sn_SR.

 * - @ref Sn_CR_OPEN 		: Initialize or open socket.

 * - @ref Sn_CR_LISTEN 		: Wait connection request in TCP mode(<b>Server mode</b>)

 * - @ref Sn_CR_CONNECT 	: Send connection request in TCP mode(<b>Client mode</b>)

 * - @ref Sn_CR_DISCON 		: Send closing request in TCP mode.

 * - @ref Sn_CR_CLOSE   	: Close socket.

 * - @ref Sn_CR_SEND    	: Update TX buffer pointer and send data.

 * - @ref Sn_CR_SEND_MAC	: Send data with MAC address, so without ARP process.

 * - @ref Sn_CR_SEND_KEEP 	: Send keep alive message.

 * - @ref Sn_CR_RECV		: Update RX buffer pointer and receive data.

 */

#define Sn_CR(N)           (_W5500_IO_BASE_ + (0x0001 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Socket interrupt register(R)

 * @details @ref Sn_IR indicates the status of Socket Interrupt such as establishment, termination, receiving data, timeout).\n

 * When an interrupt occurs and the corresponding bit of @ref Sn_IMR is  the corresponding bit of @ref Sn_IR becomes \n

 * In order to clear the @ref Sn_IR bit, the host should write the bit to \n

 * <table>

 * 		<tr>  <td>7</td> <td>6</td> <td>5</td> <td>4</td> <td>3</td> <td>2</td> <td>1</td> <td>0</td>   </tr>

 * 		<tr>  <td>Reserved</td> <td>Reserved</td> <td>Reserved</td> <td>SEND_OK</td> <td>TIMEOUT</td> <td>RECV</td> <td>DISCON</td> <td>CON</td> </tr>

 * </table>

 * - \ref Sn_IR_SENDOK : <b>SEND_OK Interrupt</b>

 * - \ref Sn_IR_TIMEOUT : <b>TIMEOUT Interrupt</b>

 * - \ref Sn_IR_RECV : <b>RECV Interrupt</b>

 * - \ref Sn_IR_DISCON : <b>DISCON Interrupt</b>

 * - \ref Sn_IR_CON : <b>CON Interrupt</b>

 */

#define Sn_IR(N)           (_W5500_IO_BASE_ + (0x0002 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Socket status register(R)

 * @details @ref Sn_SR indicates the status of Socket n.\n

 * The status of Socket n is changed by @ref Sn_CR or some special control packet as SYN, FIN packet in TCP.

 * @par Normal status

 * - @ref SOCK_CLOSED 		: Closed

 * - @ref SOCK_INIT   		: Initiate state

 * - @ref SOCK_LISTEN    	: Listen state

 * - @ref SOCK_ESTABLISHED 	: Success to connect

 * - @ref SOCK_CLOSE_WAIT   : Closing state

 * - @ref SOCK_UDP   		: UDP socket

 * - @ref SOCK_MACRAW  		: MAC raw mode socket

 *@par Temporary status during changing the status of Socket n.

 * - @ref SOCK_SYNSENT   	: This indicates Socket n sent the connect-request packet (SYN packet) to a peer.

 * - @ref SOCK_SYNRECV    	: It indicates Socket n successfully received the connect-request packet (SYN packet) from a peer.

 * - @ref SOCK_FIN_WAIT		: Connection state

 * - @ref SOCK_CLOSING		: Closing state

 * - @ref SOCK_TIME_WAIT	: Closing state

 * - @ref SOCK_LAST_ACK 	: Closing state

 */

#define Sn_SR(N)           (uint32_t)(_W5500_IO_BASE_ + (0x0003 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief source port register(R/W)

 * @details @ref Sn_PORT configures the source port number of Socket n.

 * It is valid when Socket n is used in TCP/UPD mode. It should be set before OPEN command is ordered.

 */

#define Sn_PORT(N)         (_W5500_IO_BASE_ + (0x0004 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Peer MAC register address(R/W)

 * @details @ref Sn_DHAR configures the destination hardware address of Socket n when using SEND_MAC command in UDP mode or

 * it indicates that it is acquired in ARP-process by CONNECT/SEND command.

 */

#define Sn_DHAR(N)         (_W5500_IO_BASE_ + (0x0006 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Peer IP register address(R/W)

 * @details @ref Sn_DIPR configures or indicates the destination IP address of Socket n. It is valid when Socket n is used in TCP/UDP mode.

 * In TCP client mode, it configures an IP address of �TCP serverbefore CONNECT command.

 * In TCP server mode, it indicates an IP address of �TCP clientafter successfully establishing connection.

 * In UDP mode, it configures an IP address of peer to be received the UDP packet by SEND or SEND_MAC command.

 */

#define Sn_DIPR(N)         (_W5500_IO_BASE_ + (0x000C << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Peer port register address(R/W)

 * @details @ref Sn_DPORT configures or indicates the destination port number of Socket n. It is valid when Socket n is used in TCP/UDP mode.

 * In �TCP clientmode, it configures the listen port number of �TCP serverbefore CONNECT command.

 * In �TCP Servermode, it indicates the port number of TCP client after successfully establishing connection.

 * In UDP mode, it configures the port number of peer to be transmitted the UDP packet by SEND/SEND_MAC command.

 */

#define Sn_DPORT(N)        (_W5500_IO_BASE_ + (0x0010 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Maximum Segment Size(Sn_MSSR0) register address(R/W)

 * @details @ref Sn_MSSR configures or indicates the MTU(Maximum Transfer Unit) of Socket n.

 */

#define Sn_MSSR(N)         (_W5500_IO_BASE_ + (0x0012 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



// Reserved			         (_W5500_IO_BASE_ + (0x0014 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief IP Type of Service(TOS) Register(R/W)

 * @details @ref Sn_TOS configures the TOS(Type Of Service field in IP Header) of Socket n.

 * It is set before OPEN command.

 */

#define Sn_TOS(N)          (_W5500_IO_BASE_ + (0x0015 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))

/**

 * @ingroup Socket_register_group

 * @brief IP Time to live(TTL) Register(R/W)

 * @details @ref Sn_TTL configures the TTL(Time To Live field in IP header) of Socket n.

 * It is set before OPEN command.

 */

#define Sn_TTL(N)          (_W5500_IO_BASE_ + (0x0016 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0017 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x0018 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3)) 

// Reserved			         (_W5500_IO_BASE_ + (0x0019 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x001A << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x001B << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x001C << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))

// Reserved			         (_W5500_IO_BASE_ + (0x001D << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Receive memory size register(R/W)

 * @details @ref Sn_RXBUF_SIZE configures the RX buffer block size of Socket n.

 * Socket n RX Buffer Block size can be configured with 1,2,4,8, and 16 Kbytes.

 * If a different size is configured, the data cannot be normally received from a peer.

 * Although Socket n RX Buffer Block size is initially configured to 2Kbytes,

 * user can re-configure its size using @ref Sn_RXBUF_SIZE. The total sum of @ref Sn_RXBUF_SIZE can not be exceed 16Kbytes.

 * When exceeded, the data reception error is occurred.

 */

#define Sn_RXBUF_SIZE(N)   (_W5500_IO_BASE_ + (0x001E << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Transmit memory size register(R/W)

 * @details @ref Sn_TXBUF_SIZE configures the TX buffer block size of Socket n. Socket n TX Buffer Block size can be configured with 1,2,4,8, and 16 Kbytes.

 * If a different size is configured, the data can�t be normally transmitted to a peer.

 * Although Socket n TX Buffer Block size is initially configured to 2Kbytes,

 * user can be re-configure its size using @ref Sn_TXBUF_SIZE. The total sum of @ref Sn_TXBUF_SIZE can not be exceed 16Kbytes.

 * When exceeded, the data transmission error is occurred.

 */

#define Sn_TXBUF_SIZE(N)   (_W5500_IO_BASE_ + (0x001F << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Transmit free memory size register(R)

 * @details @ref Sn_TX_FSR indicates the free size of Socket n TX Buffer Block. It is initialized to the configured size by @ref Sn_TXBUF_SIZE.

 * Data bigger than @ref Sn_TX_FSR should not be saved in the Socket n TX Buffer because the bigger data overwrites the previous saved data not yet sent.

 * Therefore, check before saving the data to the Socket n TX Buffer, and if data is equal or smaller than its checked size,

 * transmit the data with SEND/SEND_MAC command after saving the data in Socket n TX buffer. But, if data is bigger than its checked size,

 * transmit the data after dividing into the checked size and saving in the Socket n TX buffer.

 */

#define Sn_TX_FSR(N)       (_W5500_IO_BASE_ + (0x0020 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Transmit memory read pointer register address(R)

 * @details @ref Sn_TX_RD is initialized by OPEN command. However, if Sn_MR(P[3:0]) is TCP mode(001, it is re-initialized while connecting with TCP.

 * After its initialization, it is auto-increased by SEND command.

 * SEND command transmits the saved data from the current @ref Sn_TX_RD to the @ref Sn_TX_WR in the Socket n TX Buffer.

 * After transmitting the saved data, the SEND command increases the @ref Sn_TX_RD as same as the @ref Sn_TX_WR.

 * If its increment value exceeds the maximum value 0xFFFF, (greater than 0x10000 and the carry bit occurs),

 * then the carry bit is ignored and will automatically update with the lower 16bits value.

 */

#define Sn_TX_RD(N)        (_W5500_IO_BASE_ + (0x0022 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Transmit memory write pointer register address(R/W)

 * @details @ref Sn_TX_WR is initialized by OPEN command. However, if Sn_MR(P[3:0]) is TCP mode(001, it is re-initialized while connecting with TCP.\n

 * It should be read or be updated like as follows.\n

 * 1. Read the starting address for saving the transmitting data.\n

 * 2. Save the transmitting data from the starting address of Socket n TX buffer.\n

 * 3. After saving the transmitting data, update @ref Sn_TX_WR to the increased value as many as transmitting data size.

 * If the increment value exceeds the maximum value 0xFFFF(greater than 0x10000 and the carry bit occurs),

 * then the carry bit is ignored and will automatically update with the lower 16bits value.\n

 * 4. Transmit the saved data in Socket n TX Buffer by using SEND/SEND command

 */

#define Sn_TX_WR(N)        (_W5500_IO_BASE_ + (0x0024 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Received data size register(R)

 * @details @ref Sn_RX_RSR indicates the data size received and saved in Socket n RX Buffer.

 * @ref Sn_RX_RSR does not exceed the @ref Sn_RXBUF_SIZE and is calculated as the difference between

 * �Socket n RX Write Pointer (@ref Sn_RX_WR)and �Socket n RX Read Pointer (@ref Sn_RX_RD)

 */

#define Sn_RX_RSR(N)       (_W5500_IO_BASE_ + (0x0026 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Read point of Receive memory(R/W)

 * @details @ref Sn_RX_RD is initialized by OPEN command. Make sure to be read or updated as follows.\n

 * 1. Read the starting save address of the received data.\n

 * 2. Read data from the starting address of Socket n RX Buffer.\n

 * 3. After reading the received data, Update @ref Sn_RX_RD to the increased value as many as the reading size.

 * If the increment value exceeds the maximum value 0xFFFF, that is, is greater than 0x10000 and the carry bit occurs,

 * update with the lower 16bits value ignored the carry bit.\n

 * 4. Order RECV command is for notifying the updated @ref Sn_RX_RD to W5500.

 */

#define Sn_RX_RD(N)        (_W5500_IO_BASE_ + (0x0028 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Write point of Receive memory(R)

 * @details @ref Sn_RX_WR is initialized by OPEN command and it is auto-increased by the data reception.

 * If the increased value exceeds the maximum value 0xFFFF, (greater than 0x10000 and the carry bit occurs),

 * then the carry bit is ignored and will automatically update with the lower 16bits value.

 */

#define Sn_RX_WR(N)        (_W5500_IO_BASE_ + (0x002A << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief socket interrupt mask register(R)

 * @details @ref Sn_IMR masks the interrupt of Socket n.

 * Each bit corresponds to each bit of @ref Sn_IR. When a Socket n Interrupt is occurred and the corresponding bit of @ref Sn_IMR is 

 * the corresponding bit of @ref Sn_IR becomes  When both the corresponding bit of @ref Sn_IMR and @ref Sn_IR are and the n-th bit of @ref IR is 

 * Host is interrupted by asserted INTn PIN to low.

 */

#define Sn_IMR(N)          (_W5500_IO_BASE_ + (0x002C << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Fragment field value in IP header register(R/W)

 * @details @ref Sn_FRAG configures the FRAG(Fragment field in IP header).

 */

#define Sn_FRAG(N)         (_W5500_IO_BASE_ + (0x002D << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



/**

 * @ingroup Socket_register_group

 * @brief Keep Alive Timer register(R/W)

 * @details @ref Sn_KPALVTR configures the transmitting timer of �KEEP ALIVE(KA)packet of SOCKETn. It is valid only in TCP mode,

 * and ignored in other modes. The time unit is 5s.

 * KA packet is transmittable after @ref Sn_SR is changed to SOCK_ESTABLISHED and after the data is transmitted or received to/from a peer at least once.

 * In case of '@ref Sn_KPALVTR > 0', W5500 automatically transmits KA packet after time-period for checking the TCP connection (Auto-keepalive-process).

 * In case of '@ref Sn_KPALVTR = 0', Auto-keep-alive-process will not operate,

 * and KA packet can be transmitted by SEND_KEEP command by the host (Manual-keep-alive-process).

 * Manual-keep-alive-process is ignored in case of '@ref Sn_KPALVTR > 0'.

 */

#define Sn_KPALVTR(N)      (_W5500_IO_BASE_ + (0x002F << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))



//#define Sn_TSR(N)          (_W5500_IO_BASE_ + (0x0030 << 8) + (WIZCHIP_SREG_BLOCK(N) << 3))





//----------------------------- W5500 Register values  -----------------------------



/* MODE register values */

/**

 * @brief Reset

 * @details If this bit is  All internal registers will be initialized. It will be automatically cleared as after S/W reset.

 */

#define MR_RST                       0x80



/**

 * @brief Wake on LAN

 * @details 0 : Disable WOL mode\n

 * 1 : Enable WOL mode\n

 * If WOL mode is enabled and the received magic packet over UDP has been normally processed, the Interrupt PIN (INTn) asserts to low.

 * When using WOL mode, the UDP Socket should be opened with any source port number. (Refer to Socket n Mode Register (@ref Sn_MR) for opening Socket.)

 * @note The magic packet over UDP supported by W5500 consists of 6 bytes synchronization stream (xFFFFFFFFFFFF and

 * 16 times Target MAC address stream in UDP payload. The options such like password are ignored. You can use any UDP source port number for WOL mode.

 */

#define MR_WOL                       0x20



/**

 * @brief Ping block

 * @details 0 : Disable Ping block\n

 * 1 : Enable Ping block\n

 * If the bit is  it blocks the response to a ping request.

 */

#define MR_PB                        0x10



/**

 * @brief Enable PPPoE

 * @details 0 : DisablePPPoE mode\n

 * 1 : EnablePPPoE mode\n

 * If you use ADSL, this bit should be 

 */

#define MR_PPPOE                     0x08



/**

 * @brief Enable UDP_FORCE_ARP CHECHK

 * @details 0 : Disable Force ARP mode\n

 * 1 : Enable Force ARP mode\n

 * In Force ARP mode, It forces on sending ARP Request whenever data is sent.

 */

#define MR_FARP                      0x02



/* IR register values */

/**

 * @brief Check IP conflict.

 * @details Bit is set as when own source IP address is same with the sender IP address in the received ARP request.

 */

#define IR_CONFLICT                  0x80



/**

 * @brief Get the destination unreachable message in UDP sending.

 * @details When receiving the ICMP (Destination port unreachable) packet, this bit is set as 

 * When this bit is  Destination Information such as IP address and Port number may be checked with the corresponding @ref UIPR & @ref UPORTR.

 */

#define IR_UNREACH                   0x40



/**

 * @brief Get the PPPoE close message.

 * @details When PPPoE is disconnected during PPPoE mode, this bit is set.

 */

#define IR_PPPoE                     0x20



/**

 * @brief Get the magic packet interrupt.

 * @details When WOL mode is enabled and receives the magic packet over UDP, this bit is set.

 */

#define IR_MP                        0x10





/* PHYCFGR register value */

#define PHYCFGR_RST                  ~(1<<7)  //< For PHY reset, must operate AND mask.

#define PHYCFGR_OPMD                 (1<<6)   // Configre PHY with OPMDC value

#define PHYCFGR_OPMDC_ALLA           (7<<3)

#define PHYCFGR_OPMDC_PDOWN          (6<<3)

#define PHYCFGR_OPMDC_NA             (5<<3)

#define PHYCFGR_OPMDC_100FA          (4<<3)

#define PHYCFGR_OPMDC_100F           (3<<3)

#define PHYCFGR_OPMDC_100H           (2<<3)

#define PHYCFGR_OPMDC_10F            (1<<3)

#define PHYCFGR_OPMDC_10H            (0<<3)           

#define PHYCFGR_DPX_FULL             (1<<2)

#define PHYCFGR_DPX_HALF             (0<<2)

#define PHYCFGR_SPD_100              (1<<1)

#define PHYCFGR_SPD_10               (0<<1)

#define PHYCFGR_LNK_ON               (1<<0)

#define PHYCFGR_LNK_OFF              (0<<0)



/* IMR register values */

/**

 * @brief IP Conflict Interrupt Mask.

 * @details 0: Disable IP Conflict Interrupt\n

 * 1: Enable IP Conflict Interrupt

 */

#define IM_IR7                  	 0x80



/**

 * @brief Destination unreachable Interrupt Mask.

 * @details 0: Disable Destination unreachable Interrupt\n

 * 1: Enable Destination unreachable Interrupt

 */

#define IM_IR6                  	 0x40



/**

 * @brief PPPoE Close Interrupt Mask.

 * @details 0: Disable PPPoE Close Interrupt\n

 * 1: Enable PPPoE Close Interrupt

 */

#define IM_IR5                  	 0x20



/**

 * @brief Magic Packet Interrupt Mask.

 * @details 0: Disable Magic Packet Interrupt\n

 * 1: Enable Magic Packet Interrupt

 */

#define IM_IR4                  	 0x10



/* Sn_MR Default values */

/**

 * @brief Support UDP Multicasting

 * @details 0 : disable Multicasting\n

 * 1 : enable Multicasting\n

 * This bit is applied only during UDP mode(P[3:0] = 010.\n

 * To use multicasting, @ref Sn_DIPR & @ref Sn_DPORT should be respectively configured with the multicast group IP address & port number

 * before Socket n is opened by OPEN command of @ref Sn_CR.

 */

#define Sn_MR_MULTI                  0x80



/**

 * @brief Broadcast block in UDP Multicasting.

 * @details 0 : disable Broadcast Blocking\n

 * 1 : enable Broadcast Blocking\n

 * This bit blocks to receive broadcasting packet during UDP mode(P[3:0] = 010.\m

 * In addition, This bit does when MACRAW mode(P[3:0] = 100

 */

#define Sn_MR_BCASTB                 0x40



/**

 * @brief No Delayed Ack(TCP), Multicast flag

 * @details 0 : Disable No Delayed ACK option\n

 * 1 : Enable No Delayed ACK option\n

 * This bit is applied only during TCP mode (P[3:0] = 001.\n

 * When this bit is  It sends the ACK packet without delay as soon as a Data packet is received from a peer.\n

 * When this bit is  It sends the ACK packet after waiting for the timeout time configured by @ref RTR.

 */

#define Sn_MR_ND                     0x20



/**

 * @brief Unicast Block in UDP Multicasting

 * @details 0 : disable Unicast Blocking\n

 * 1 : enable Unicast Blocking\n

 * This bit blocks receiving the unicast packet during UDP mode(P[3:0] = 010 and MULTI = 

 */

#define Sn_MR_UCASTB                 0x10



/**

 * @brief MAC LAYER RAW SOCK

 * @details This configures the protocol mode of Socket n.

 * @note MACRAW mode should be only used in Socket 0.

 */

#define Sn_MR_MACRAW                 0x04



//#define Sn_MR_IPRAW                  0x03     /**< IP LAYER RAW SOCK */



/**

 * @brief UDP

 * @details This configures the protocol mode of Socket n.

 */

#define Sn_MR_UDP                    0x02



/**

 * @brief TCP

 * @details This configures the protocol mode of Socket n.

 */

#define Sn_MR_TCP                    0x01



/**

 * @brief Unused socket

 * @details This configures the protocol mode of Socket n.

 */

#define Sn_MR_CLOSE                  0x00



/* Sn_MR values used with Sn_MR_MACRAW */

/**

 * @brief MAC filter enable in @ref Sn_MR_MACRAW mode

 * @details 0 : disable MAC Filtering\n

 * 1 : enable MAC Filtering\n

 * This bit is applied only during MACRAW mode(P[3:0] = 100.\n

 * When set as  W5500 can only receive broadcasting packet or packet sent to itself.

 * When this bit is  W5500 can receive all packets on Ethernet.

 * If user wants to implement Hybrid TCP/IP stack,

 * it is recommended that this bit is set as for reducing host overhead to process the all received packets.

 */

#define Sn_MR_MFEN                   Sn_MR_MULTI



/**

 * @brief Multicast Blocking in @ref Sn_MR_MACRAW mode

 * @details 0 : using IGMP version 2\n

 * 1 : using IGMP version 1\n

 * This bit is applied only during UDP mode(P[3:0] = 010 and MULTI = 

 * It configures the version for IGMP messages (Join/Leave/Report).

 */

#define Sn_MR_MMB                    Sn_MR_ND



/**

 * @brief IPv6 packet Blocking in @ref Sn_MR_MACRAW mode

 * @details 0 : disable IPv6 Blocking\n

 * 1 : enable IPv6 Blocking\n

 * This bit is applied only during MACRAW mode (P[3:0] = 100. It blocks to receiving the IPv6 packet.

 */

#define Sn_MR_MIP6B                  Sn_MR_UCASTB



/* Sn_MR value used with Sn_MR_UDP & Sn_MR_MULTI */

/**

 * @brief IGMP version used in UDP mulitcasting

 * @details 0 : disable Multicast Blocking\n

 * 1 : enable Multicast Blocking\n

 * This bit is applied only when MACRAW mode(P[3:0] = 100. It blocks to receive the packet with multicast MAC address.

 */

#define Sn_MR_MC                     Sn_MR_ND



/* Sn_MR alternate values */

/**

 * @brief For Berkeley Socket API

 */

#define SOCK_STREAM                  Sn_MR_TCP



/**

 * @brief For Berkeley Socket API

 */

#define SOCK_DGRAM                   Sn_MR_UDP





/* Sn_CR values */

/**

 * @brief Initialize or open socket

 * @details Socket n is initialized and opened according to the protocol selected in Sn_MR(P3:P0).

 * The table below shows the value of @ref Sn_SR corresponding to @ref Sn_MR.\n

 * <table>

 *   <tr>  <td>\b Sn_MR (P[3:0])</td> <td>\b Sn_SR</td>            		 </tr>

 *   <tr>  <td>Sn_MR_CLOSE  (000</td> <td></td>         	   		 </tr>

 *   <tr>  <td>Sn_MR_TCP  (001</td> <td>SOCK_INIT (0x13)</td>  		 </tr>

 *   <tr>  <td>Sn_MR_UDP  (010</td>  <td>SOCK_UDP (0x22)</td>  		 </tr>

 *   <tr>  <td>S0_MR_MACRAW  (100</td>  <td>SOCK_MACRAW (0x02)</td>  </tr>

 * </table>

 */

#define Sn_CR_OPEN                   0x01



/**

 * @brief Wait connection request in TCP mode(Server mode)

 * @details This is valid only in TCP mode (Sn_MR(P3:P0) = Sn_MR_TCP).

 * In this mode, Socket n operates as a �TCP serverand waits for  connection-request (SYN packet) from any �TCP client

 * The @ref Sn_SR changes the state from SOCK_INIT to SOCKET_LISTEN.

 * When a �TCP clientconnection request is successfully established,

 * the @ref Sn_SR changes from SOCK_LISTEN to SOCK_ESTABLISHED and the Sn_IR(0) becomes 

 * But when a �TCP clientconnection request is failed, Sn_IR(3) becomes and the status of @ref Sn_SR changes to SOCK_CLOSED.

 */

#define Sn_CR_LISTEN                 0x02



/**

 * @brief Send connection request in TCP mode(Client mode)

 * @details  To connect, a connect-request (SYN packet) is sent to b>TCP server</b>configured by @ref Sn_DIPR & Sn_DPORT(destination address & port).

 * If the connect-request is successful, the @ref Sn_SR is changed to @ref SOCK_ESTABLISHED and the Sn_IR(0) becomes \n\n

 * The connect-request fails in the following three cases.\n

 * 1. When a @b ARPTO occurs (@ref Sn_IR[3] =  ) because destination hardware address is not acquired through the ARP-process.\n

 * 2. When a @b SYN/ACK packet is not received and @b TCPTO (Sn_IR(3) =  )\n

 * 3. When a @b RST packet is received instead of a @b SYN/ACK packet. In these cases, @ref Sn_SR is changed to @ref SOCK_CLOSED.

 * @note This is valid only in TCP mode and operates when Socket n acts as b>TCP client</b>

 */

#define Sn_CR_CONNECT                0x04



/**

 * @brief Send closing request in TCP mode

 * @details Regardless of b>TCP server</b>or b>TCP client</b> the DISCON command processes the disconnect-process (b>Active close</b>or b>Passive close</b>.\n

 * @par Active close

 * it transmits disconnect-request(FIN packet) to the connected peer\n

 * @par Passive close

 * When FIN packet is received from peer, a FIN packet is replied back to the peer.\n

 * @details When the disconnect-process is successful (that is, FIN/ACK packet is received successfully), @ref Sn_SR is changed to @ref SOCK_CLOSED.\n

 * Otherwise, TCPTO occurs (Sn_IR(3)=)= and then @ref Sn_SR is changed to @ref SOCK_CLOSED.

 * @note Valid only in TCP mode.

 */

#define Sn_CR_DISCON                 0x08



/**

 * @brief Close socket

 * @details Sn_SR is changed to @ref SOCK_CLOSED.

 */

#define Sn_CR_CLOSE                  0x10



/**

 * @brief Update TX buffer pointer and send data

 * @details SEND transmits all the data in the Socket n TX buffer.\n

 * For more details, please refer to Socket n TX Free Size Register (@ref Sn_TX_FSR), Socket n,

 * TX Write Pointer Register(@ref Sn_TX_WR), and Socket n TX Read Pointer Register(@ref Sn_TX_RD).

 */

#define Sn_CR_SEND                   0x20



/**

 * @brief Send data with MAC address, so without ARP process

 * @details The basic operation is same as SEND.\n

 * Normally SEND transmits data after destination hardware address is acquired by the automatic ARP-process(Address Resolution Protocol).\n

 * But SEND_MAC transmits data without the automatic ARP-process.\n

 * In this case, the destination hardware address is acquired from @ref Sn_DHAR configured by host, instead of APR-process.

 * @note Valid only in UDP mode.

 */

#define Sn_CR_SEND_MAC               0x21



/**

 * @brief Send keep alive message

 * @details It checks the connection status by sending 1byte keep-alive packet.\n

 * If the peer can not respond to the keep-alive packet during timeout time, the connection is terminated and the timeout interrupt will occur.

 * @note Valid only in TCP mode.

 */

#define Sn_CR_SEND_KEEP              0x22



/**

 * @brief Update RX buffer pointer and receive data

 * @details RECV completes the processing of the received data in Socket n RX Buffer by using a RX read pointer register (@ref Sn_RX_RD).\n

 * For more details, refer to Socket n RX Received Size Register (@ref Sn_RX_RSR), Socket n RX Write Pointer Register (@ref Sn_RX_WR),

 * and Socket n RX Read Pointer Register (@ref Sn_RX_RD).

 */

#define Sn_CR_RECV                   0x40



/* Sn_IR values */

/**

 * @brief SEND_OK Interrupt

 * @details This is issued when SEND command is completed.

 */

#define Sn_IR_SENDOK                 0x10



/**

 * @brief TIMEOUT Interrupt

 * @details This is issued when ARPTO or TCPTO occurs.

 */

#define Sn_IR_TIMEOUT                0x08



/**

 * @brief RECV Interrupt

 * @details This is issued whenever data is received from a peer.

 */

#define Sn_IR_RECV                   0x04



/**

 * @brief DISCON Interrupt

 * @details This is issued when FIN or FIN/ACK packet is received from a peer.

 */

#define Sn_IR_DISCON                 0x02



/**

 * @brief CON Interrupt

 * @details This is issued one time when the connection with peer is successful and then @ref Sn_SR is changed to @ref SOCK_ESTABLISHED.

 */

#define Sn_IR_CON                    0x01



/* Sn_SR values */

/**

 * @brief Closed

 * @details This indicates that Socket n is released.\N

 * When DICON, CLOSE command is ordered, or when a timeout occurs, it is changed to @ref SOCK_CLOSED regardless of previous status.

 */

#define SOCK_CLOSED                  0x00



/**

 * @brief Initiate state

 * @details This indicates Socket n is opened with TCP mode.\N

 * It is changed to @ref SOCK_INIT when Sn_MR(P[3:0]) = 001and OPEN command is ordered.\N

 * After @ref SOCK_INIT, user can use LISTEN /CONNECT command.

 */

#define SOCK_INIT                    0x13



/**

 * @brief Listen state

 * @details This indicates Socket n is operating as b>TCP server</b>mode and waiting for connection-request (SYN packet) from a peer (b>TCP client</b>.\n

 * It will change to @ref SOCK_ESTALBLISHED when the connection-request is successfully accepted.\n

 * Otherwise it will change to @ref SOCK_CLOSED after TCPTO occurred (Sn_IR(TIMEOUT) = .

 */

#define SOCK_LISTEN                  0x14



/**

 * @brief Connection state

 * @details This indicates Socket n sent the connect-request packet (SYN packet) to a peer.\n

 * It is temporarily shown when @ref Sn_SR is changed from @ref SOCK_INIT to @ref SOCK_ESTABLISHED by CONNECT command.\n

 * If connect-accept(SYN/ACK packet) is received from the peer at SOCK_SYNSENT, it changes to @ref SOCK_ESTABLISHED.\n

 * Otherwise, it changes to @ref SOCK_CLOSED after TCPTO (@ref Sn_IR[TIMEOUT] =  is occurred.

 */

#define SOCK_SYNSENT                 0x15



/**

 * @brief Connection state

 * @details It indicates Socket n successfully received the connect-request packet (SYN packet) from a peer.\n

 * If socket n sends the response (SYN/ACK  packet) to the peer successfully,  it changes to @ref SOCK_ESTABLISHED. \n

 * If not, it changes to @ref SOCK_CLOSED after timeout occurs (@ref Sn_IR[TIMEOUT] = .

 */

#define SOCK_SYNRECV…