text: //*****************************************************************************
  //
  //! \file w5100.c
  //! \brief W5100 HAL Interface.
  //! \version 1.0.0
  //! \date 2013/10/21
  //! \par  Revision history
  //!       <2013/10/21> 1st Release
  //! \author MidnightCow
  //! 
  //! 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.
  //
  //*****************************************************************************
  
  #include "w5100s.h"
  
  #if   (_WIZCHIP_ == W5100S)
  /**
  @brief  This function writes the data into W5200 registers.
  */
  void     WIZCHIP_WRITE(uint32_t AddrSel, uint8_t wb )
  {
  	int i;
     WIZCHIP_CRITICAL_ENTER();
     WIZCHIP.CS._select();
  
  #if( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_))
     WIZCHIP.IF.SPI._write_byte(0xF0);
     WIZCHIP.IF.SPI._write_byte((AddrSel & 0xFF00) >>  8);
     WIZCHIP.IF.SPI._write_byte((AddrSel & 0x00FF) >>  0);
     WIZCHIP.IF.SPI._write_byte(wb);    // Data write (write 1byte data)
  #elif ( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_5500_) )
  	WIZCHIP.IF.SPI._write_byte((AddrSel & 0xFF00) >>  8);
  	WIZCHIP.IF.SPI._write_byte((AddrSel & 0x00FF) >>  0);
  	WIZCHIP.IF.SPI._write_byte(0xF0);
  	WIZCHIP.IF.SPI._write_byte(wb);    // Data write (write 1byte data)
  #elif ( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_BUS_INDIR_) )
  
     //add indirect bus 
     //M20150601 : Rename the function for integrating with ioLibrary
     //WIZCHIP.IF.BUS._write_byte(IDM_AR0,(AddrSel & 0xFF00) >>  8);
     //WIZCHIP.IF.BUS._write_byte(IDM_AR1,(AddrSel & 0x00FF));	
     //WIZCHIP.IF.BUS._write_byte(IDM_DR,wb);
     WIZCHIP.IF.BUS._write_data(IDM_AR0,(AddrSel & 0xFF00) >>  8);
     WIZCHIP.IF.BUS._write_data(IDM_AR1,(AddrSel & 0x00FF));	
     WIZCHIP.IF.BUS._write_data(IDM_DR,wb);
  #else
     #error "Unknown _WIZCHIP_IO_MODE_ in W5100. !!!"
  #endif
  
     WIZCHIP.CS._deselect();
     WIZCHIP_CRITICAL_EXIT();
  }
  /**
  @brief  This function reads the value from W5200 registers.
  */
  uint8_t  WIZCHIP_READ(uint32_t AddrSel)
  {
     uint8_t ret;
     int i;
     WIZCHIP_CRITICAL_ENTER();
     WIZCHIP.CS._select();
  
  #if( (_WIZCHIP_IO_MODE_ ==  _WIZCHIP_IO_MODE_SPI_))
     WIZCHIP.IF.SPI._write_byte(0x0F);
     WIZCHIP.IF.SPI._write_byte((AddrSel & 0xFF00) >>  8);
     WIZCHIP.IF.SPI._write_byte((AddrSel & 0x00FF) >>  0);
     ret = WIZCHIP.IF.SPI._read_byte(); 
  #elif ( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_5500_) )
  	WIZCHIP.IF.SPI._write_byte((AddrSel & 0xFF00) >>  8);
  	WIZCHIP.IF.SPI._write_byte((AddrSel & 0x00FF) >>  0);
  	WIZCHIP.IF.SPI._write_byte(0x0F);
  	ret = WIZCHIP.IF.SPI._read_byte();
  #elif ( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_BUS_INDIR_) )
  
     //add indirect bus
     //M20150601 : Rename the function for integrating with ioLibrary
     //WIZCHIP.IF.BUS._write_byte(IDM_AR0,(AddrSel & 0xFF00) >>  8);
     //WIZCHIP.IF.BUS._write_byte(IDM_AR1,(AddrSel & 0x00FF));	
     //ret = WIZCHIP.IF.BUS._read_byte(IDM_DR);
     WIZCHIP.IF.BUS._write_data(IDM_AR0,(AddrSel & 0xFF00) >>  8);
     WIZCHIP.IF.BUS._write_data(IDM_AR1,(AddrSel & 0x00FF));
     ret = WIZCHIP.IF.BUS._read_data(IDM_DR);
  
  #else
     #error "Unknown _WIZCHIP_IO_MODE_ in W5100. !!!"   
  #endif
  
     WIZCHIP.CS._deselect();
     WIZCHIP_CRITICAL_EXIT();
     return ret;
  }
  
  
  /**
  @brief  This function writes into W5200 memory(Buffer)
  */ 
  void     WIZCHIP_WRITE_BUF(uint32_t AddrSel, uint8_t* pBuf, uint16_t len)
  {
     uint16_t i = 0;
     int j,k,l;
     WIZCHIP_CRITICAL_ENTER();
     WIZCHIP.CS._select();   //M20150601 : Moved here.
  
  #if((_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_))
  
     WIZCHIP.IF.SPI._write_byte(0xF0);
     WIZCHIP.IF.SPI._write_byte((((uint16_t)(AddrSel+i)) & 0xFF00) >>  8);
     WIZCHIP.IF.SPI._write_byte((((uint16_t)(AddrSel+i)) & 0x00FF) >>  0);
  
     for(i = 0; i < len; i++)
     {
  	   WIZCHIP.IF.SPI._write_byte(pBuf[i]);    // Data write (write 1byte data)
     }
  
  #elif ( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_5500_) )
  
  	WIZCHIP.IF.SPI._write_byte((((uint16_t)(AddrSel+i)) & 0xFF00) >>  8);
  	WIZCHIP.IF.SPI._write_byte((((uint16_t)(AddrSel+i)) & 0x00FF) >>  0);
  	WIZCHIP.IF.SPI._write_byte(0xF0);
  
  	for(i = 0; i < len; i++)
  	{
  		WIZCHIP.IF.SPI._write_byte(pBuf[i]);    // Data write (write 1byte data)
  	}
  #elif ( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_BUS_INDIR_) )
     //M20150601 : Rename the function for integrating with ioLibrary  
     /*
     WIZCHIP_WRITE(MR,WIZCHIP_READ(MR) | MR_AI);     
     WIZCHIP.IF.BUS._write_byte(IDM_AR0,(AddrSel & 0xFF00) >>  8);
     WIZCHIP.IF.BUS._write_byte(IDM_AR1,(AddrSel & 0x00FF));
     for(i = 0 ; i < len; i++)
        WIZCHIP.IF.BUS._write_byte(IDM_DR,pBuf[i]);
     WIZCHIP_WRITE(MR, WIZCHIP_READ(MR) & ~MR_AI);   
     */
     setMR(getMR()|MR_AI);     
     WIZCHIP.IF.BUS._write_data(IDM_AR0,(AddrSel & 0xFF00) >>  8);
     WIZCHIP.IF.BUS._write_data(IDM_AR1,(AddrSel & 0x00FF));
     for(i = 0 ; i < len; i++)
        WIZCHIP.IF.BUS._write_data(IDM_DR,pBuf[i]);
     setMR(getMR() & ~MR_AI);   
  
  #else
     #error "Unknown _WIZCHIP_IO_MODE_ in W5100. !!!!"
  #endif
     
     WIZCHIP.CS._deselect();  //M20150601 : Moved here.
     WIZCHIP_CRITICAL_EXIT();
  }
  
  /**
  @brief  This function reads into W5200 memory(Buffer)
  */ 
  
  void     WIZCHIP_READ_BUF (uint32_t AddrSel, uint8_t* pBuf, uint16_t len)
  {
     uint16_t i = 0;
     WIZCHIP_CRITICAL_ENTER();
     WIZCHIP.CS._select();   //M20150601 : Moved here.
     
  #if( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_) )
  
     WIZCHIP.IF.SPI._write_byte(0x0F);
     WIZCHIP.IF.SPI._write_byte((uint16_t)((AddrSel+i) & 0xFF00) >>  8);
     WIZCHIP.IF.SPI._write_byte((uint16_t)((AddrSel+i) & 0x00FF) >>  0);
  
     for(i = 0; i < len; i++)
     {
        pBuf[i] = WIZCHIP.IF.SPI._read_byte(); 
     }
  #elif ( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_5500_) )
  
     WIZCHIP.IF.SPI._write_byte((uint16_t)((AddrSel+i) & 0xFF00) >>  8);
     WIZCHIP.IF.SPI._write_byte((uint16_t)((AddrSel+i) & 0x00FF) >>  0);
     WIZCHIP.IF.SPI._write_byte(0x0F);
  
     for(i = 0; i < len; i++)
     {
        pBuf[i] = WIZCHIP.IF.SPI._read_byte();
     }
  
  #elif ( (_WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_BUS_INDIR_) )
     //M20150601 : Rename the function for integrating with ioLibrary  
     /*
     WIZCHIP_WRITE(MR, WIZCHIP_READ(MR) | MR_AI);    
     WIZCHIP.IF.BUS._write_byte(IDM_AR0,(AddrSel & 0xFF00) >>  8);
     WIZCHIP.IF.BUS._write_byte(IDM_AR1,(AddrSel & 0x00FF));	
     for(i = 0 ; i < len; i++)
        pBuf[i]	= WIZCHIP.IF.BUS._read_byte(IDM_DR);
     WIZCHIP_WRITE(MR, WIZCHIP_READ(MR) & ~MR_AI); 
     */
     setMR(getMR() | MR_AI);
     WIZCHIP.IF.BUS._write_data(IDM_AR0,(AddrSel & 0xFF00) >>  8);
     WIZCHIP.IF.BUS._write_data(IDM_AR1,(AddrSel & 0x00FF));	
     for(i = 0 ; i < len; i++)
        pBuf[i]	= WIZCHIP.IF.BUS._read_data(IDM_DR);
     setMR(getMR() & ~MR_AI); 
     
  #else
     #error "Unknown _WIZCHIP_IO_MODE_ in W5100. !!!!"
  #endif
  
     WIZCHIP.CS._deselect();    //M20150601 : Moved Here.
     WIZCHIP_CRITICAL_EXIT();
  }
  
  ///////////////////////////////////
  // Socket N regsiter IO function //
  ///////////////////////////////////
  
  uint16_t getSn_TX_FSR(uint8_t sn)
  {
     uint16_t val=0,val1=0;
     do
     {
        val1 = WIZCHIP_READ(Sn_TX_FSR(sn));
        val1 = (val1 << 8) + WIZCHIP_READ(WIZCHIP_OFFSET_INC(Sn_TX_FSR(sn),1));
        if (val1 != 0)
        {
          val = WIZCHIP_READ(Sn_TX_FSR(sn));
          val = (val << 8) + WIZCHIP_READ(WIZCHIP_OFFSET_INC(Sn_TX_FSR(sn),1));
        }
     }while (val != val1);
     return val;
  }
  
  
  uint16_t getSn_RX_RSR(uint8_t sn)
  {
     uint16_t val=0,val1=0;
     do
     {
        val1 = WIZCHIP_READ(Sn_RX_RSR(sn));
        val1 = (val1 << 8) + WIZCHIP_READ(WIZCHIP_OFFSET_INC(Sn_RX_RSR(sn),1));
        if (val1 != 0)
        {
          val = WIZCHIP_READ(Sn_RX_RSR(sn));
          val = (val << 8) + WIZCHIP_READ(WIZCHIP_OFFSET_INC(Sn_RX_RSR(sn),1));
        }
     }while (val != val1);
     return val;
  }
  
  /////////////////////////////////////
  // Sn_TXBUF & Sn_RXBUF IO function //
  /////////////////////////////////////
  uint32_t getSn_RxBASE(uint8_t sn)
  {
     int8_t  i;
  #if ( _WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_BUS_DIR_)
     uint32_t rxbase = _W5100_IO_BASE_ + _WIZCHIP_IO_RXBUF_;
  #else   
     uint32_t rxbase = _WIZCHIP_IO_RXBUF_;
  #endif   
     for(i = 0; i < sn; i++)
        rxbase += getSn_RxMAX(i);
  
     return rxbase;
  }
  
  uint32_t getSn_TxBASE(uint8_t sn)
  {
     int8_t  i;
  #if ( _WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_BUS_DIR_)
     uint32_t txbase = _W5100_IO_BASE_ + _WIZCHIP_IO_TXBUF_;
  #else   
     uint32_t txbase = _WIZCHIP_IO_TXBUF_;
  #endif   
     for(i = 0; i < sn; i++)
        txbase += getSn_TxMAX(i);
     return txbase;
  }
  
  /**
  @brief  This function is being called by send() and sendto() function also. for copy the data form application buffer to Transmite buffer of the chip.
  
  This function read the Tx write pointer register and after copy the data in buffer update the Tx write pointer
  register. User should read upper byte first and lower byte later to get proper value.
  And this function is being used for copy the data form application buffer to Transmite
  buffer of the chip. It calculate the actual physical address where one has to write
  the data in transmite buffer. Here also take care of the condition while it exceed
  the Tx memory uper-bound of socket.
  
  */
  void wiz_send_data(uint8_t sn, uint8_t *wizdata, uint16_t len)
  {
    uint16_t ptr;
    uint16_t size;
    uint16_t dst_mask;
    uint16_t dst_ptr;
  
    ptr = getSn_TX_WR(sn);
  
    dst_mask = ptr & getSn_TxMASK(sn);
    dst_ptr = getSn_TxBASE(sn) + dst_mask;
    
    if (dst_mask + len > getSn_TxMAX(sn)) 
    {
      size = getSn_TxMAX(sn) - dst_mask;
      WIZCHIP_WRITE_BUF(dst_ptr, wizdata, size);
      wizdata += size;
      size = len - size;
      dst_ptr = getSn_TxBASE(sn);
      WIZCHIP_WRITE_BUF(dst_ptr, wizdata, size);
    } 
    else
    {
      WIZCHIP_WRITE_BUF(dst_ptr, wizdata, len);
    }
  
    ptr += len;
  
    setSn_TX_WR(sn, ptr);  
  }
  
  
  /**
  @brief  This function is being called by recv() also. This function is being used for copy the data form Receive buffer of the chip to application buffer.
  
  This function read the Rx read pointer register
  and after copy the data from receive buffer update the Rx write pointer register.
  User should read upper byte first and lower byte later to get proper value.
  It calculate the actual physical address where one has to read
  the data from Receive buffer. Here also take care of the condition while it exceed
  the Rx memory uper-bound of socket.
  */
  void wiz_recv_data(uint8_t sn, uint8_t *wizdata, uint16_t len)
  {
    uint16_t ptr;
    uint16_t size;
    uint16_t src_mask;
    uint16_t src_ptr;
  
    ptr = getSn_RX_RD(sn);
    
    src_mask = (uint32_t)ptr & getSn_RxMASK(sn);
    src_ptr = (getSn_RxBASE(sn) + src_mask);
  
    
    if( (src_mask + len) > getSn_RxMAX(sn) ) 
    {
      size = getSn_RxMAX(sn) - src_mask;
      WIZCHIP_READ_BUF((uint32_t)src_ptr, (uint8_t*)wizdata, size);
      wizdata += size;
      size = len - size;
  	src_ptr = getSn_RxBASE(sn);
      WIZCHIP_READ_BUF(src_ptr, (uint8_t*)wizdata, size);
    } 
    else
    {
      WIZCHIP_READ_BUF(src_ptr, (uint8_t*)wizdata, len);
    }
      
    ptr += len;
    
    setSn_RX_RD(sn, ptr);
  }
  
  void wiz_recv_ignore(uint8_t sn, uint16_t len)
  {
    uint16_t ptr;
  
    ptr = getSn_RX_RD(sn);
    
    ptr += len;
    setSn_RX_RD(sn,ptr);
  }
  
  //todo comment needed
  void wiz_mdio_write(uint8_t PHYMDIO_regadr, uint16_t var)
  {
  	//set the address to write
  	setPHYRR(PHYMDIO_regadr);
  	//set the data to write
  	setPHYDIR(var);
  	//write command
  	setPHYACR(PHYACR_WRITE);
  
  	while(getPHYACR() != 0){
  		//wait until command executed.
  	}
  }
  
  uint16_t wiz_mdio_read(uint8_t PHYMDIO_regadr)
  {
  	setPHYRR(PHYMDIO_regadr);
  	setPHYACR(PHYACR_READ);
  	while(getPHYACR() != 0){
  		//wait until command executed.
  	}
  	return getPHYDOR();
  }
  
  #endif
  