BITSLIP FUNCTION STATEMACHINE

// ISERDESE2: Input SERial/DESerializer with Bitslip
   //            Virtex-7
   // Xilinx HDL Language Template, version 14.6

   ISERDESE2 #(
      .DATA_RATE("DDR"),           // DDR, SDR
      .DATA_WIDTH(4),              // Parallel data width (2-8,10,14)
      .DYN_CLKDIV_INV_EN("FALSE"), // Enable DYNCLKDIVINVSEL inversion 
(FALSE, TRUE)
      .DYN_CLK_INV_EN("FALSE"),    // Enable DYNCLKINVSEL inversion 
(FALSE, TRUE)
      // INIT_Q1 - INIT_Q4: Initial value on the Q outputs (0/1)
      .INIT_Q1(1'b0),
      .INIT_Q2(1'b0),
      .INIT_Q3(1'b0),
      .INIT_Q4(1'b0),
      .INTERFACE_TYPE("MEMORY"),   // MEMORY, MEMORY_DDR3, MEMORY_QDR, 
NETWORKING, OVERSAMPLE
      .IOBDELAY("NONE"),           // NONE, BOTH, IBUF, IFD
      .NUM_CE(2),                  // Number of clock enables (1,2)
      .OFB_USED("FALSE"),          // Select OFB path (FALSE, TRUE)
      .SERDES_MODE("MASTER"),      // MASTER, SLAVE
      // SRVAL_Q1 - SRVAL_Q4: Q output values when SR is used (0/1)
      .SRVAL_Q1(1'b0),
      .SRVAL_Q2(1'b0),
      .SRVAL_Q3(1'b0),
      .SRVAL_Q4(1'b0)
   )
   ISERDESE2_inst (
      .O(O),                       // 1-bit output: Combinatorial output
      // Q1 - Q8: 1-bit (each) output: Registered data outputs
      .Q1(Q1),
      .Q2(Q2),
      .Q3(Q3),
      .Q4(Q4),
      .Q5(Q5),
      .Q6(Q6),
      .Q7(Q7),
      .Q8(Q8),
      // SHIFTOUT1, SHIFTOUT2: 1-bit (each) output: Data width expansion 
output ports
      .SHIFTOUT1(SHIFTOUT1),
      .SHIFTOUT2(SHIFTOUT2),
      .BITSLIP(BITSLIP),           // 1-bit input: The BITSLIP pin 
performs a Bitslip operation synchronous to
                                   // CLKDIV when asserted (active 
High). Subsequently, the data seen on the Q1
                                   // to Q8 output ports will shift, as 
in a barrel-shifter operation, one
                                   // position every time Bitslip is 
invoked (DDR operation is different from
                                   // SDR).

      // CE1, CE2: 1-bit (each) input: Data register clock enable inputs
      .CE1(CE1),
      .CE2(CE2),
      .CLKDIVP(CLKDIVP),           // 1-bit input: TBD
      // Clocks: 1-bit (each) input: ISERDESE2 clock input ports
      .CLK(CLK),                   // 1-bit input: High-speed clock
      .CLKB(CLKB),                 // 1-bit input: High-speed secondary 
clock
      .CLKDIV(CLKDIV),             // 1-bit input: Divided clock
      .OCLK(OCLK),                 // 1-bit input: High speed output 
clock used when INTERFACE_TYPE="MEMORY"
      // Dynamic Clock Inversions: 1-bit (each) input: Dynamic clock 
inversion pins to switch clock polarity
      .DYNCLKDIVSEL(DYNCLKDIVSEL), // 1-bit input: Dynamic CLKDIV 
inversion
      .DYNCLKSEL(DYNCLKSEL),       // 1-bit input: Dynamic CLK/CLKB 
inversion
      // Input Data: 1-bit (each) input: ISERDESE2 data input ports
      .D(D),                       // 1-bit input: Data input
      .DDLY(DDLY),                 // 1-bit input: Serial data from 
IDELAYE2
      .OFB(OFB),                   // 1-bit input: Data feedback from 
OSERDESE2
      .OCLKB(OCLKB),               // 1-bit input: High speed negative 
edge output clock
      .RST(RST),                   // 1-bit input: Active high 
asynchronous reset
      // SHIFTIN1, SHIFTIN2: 1-bit (each) input: Data width expansion 
input ports
      .SHIFTIN1(SHIFTIN1),
      .SHIFTIN2(SHIFTIN2)
   );

   // End of ISERDESE2_inst instantiation