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`include "minsoc_defines.v" module xilinx_dcm( clk_i, clk_o ); // // Parameters // parameter divisor = 2; input clk_i; output clk_o; `ifdef SPARTAN2 `define XILINX_DLL `elsif VIRTEX `define XILINX_DLL `endif // !SPARTAN2/VIRTEX `ifdef SPARTAN3 `define XILINX_DCM `elsif VIRTEX2 `define XILINX_DCM `endif // !SPARTAN3/VIRTEX2 `ifdef SPARTAN3E `define XILINX_DCM_SP `elsif SPARTAN3A `define XILINX_DCM_SP `endif // !SPARTAN3E/SPARTAN3A `ifdef VIRTEX4 `define XILINX_DCM_ADV `define XILINX_DCM_COMPONENT "VIRTEX4" `elsif VIRTEX5 `define XILINX_DCM_ADV `define XILINX_DCM_COMPONENT "VIRTEX5" `endif // !VIRTEX4/VIRTEX5 wire CLKIN_IN; wire CLKDV_OUT; assign CLKIN_IN = clk_i; assign clk_o = CLKDV_OUT; wire CLKIN_IBUFG; wire CLK0_BUF; wire CLKFB_IN; wire CLKDV_BUF; `ifdef XILINX_FPGA IBUFG CLKIN_IBUFG_INST ( .I(CLKIN_IN), .O(CLKIN_IBUFG) ); BUFG CLK0_BUFG_INST ( .I(CLK0_BUF), .O(CLKFB_IN) ); BUFG CLKDV_BUFG_INST ( .I(CLKDV_BUF), .O(CLKDV_OUT) ); `ifdef XILINX_DLL CLKDLL #( .CLKDV_DIVIDE(divisor), // Divide by: 1.5,2.0,2.5,3.0,4.0,5.0,8.0 or 16.0 .DUTY_CYCLE_CORRECTION("TRUE"), // Duty cycle correction, TRUE or FALSE .FACTORY_JF(16'hC080), // FACTORY JF Values .STARTUP_WAIT("FALSE") // Delay config DONE until DLL LOCK, TRUE/FALSE ) CLKDLL_inst ( .CLK0(CLK0_BUF), // 0 degree DLL CLK output .CLK180(), // 180 degree DLL CLK output .CLK270(), // 270 degree DLL CLK output .CLK2X(), // 2X DLL CLK output .CLK90(), // 90 degree DLL CLK output .CLKDV(CLKDV_BUF), // Divided DLL CLK out (CLKDV_DIVIDE) .LOCKED(), // DLL LOCK status output .CLKFB(CLKFB_IN), // DLL clock feedback .CLKIN(CLKIN_IBUFG), // Clock input (from IBUFG, BUFG or DLL) .RST(1'b0) // DLL asynchronous reset input ); `elsif XILINX_DCM DCM #( .SIM_MODE("SAFE"), // Simulation: "SAFE" vs. "FAST", see "Synthesis and Simulation Design Guide" for details .CLKDV_DIVIDE(divisor), // Divide by: 1.5,2.0,2.5,3.0,3.5,4.0,4.5,5.0,5.5,6.0,6.5 // 7.0,7.5,8.0,9.0,10.0,11.0,12.0,13.0,14.0,15.0 or 16.0 .CLKFX_DIVIDE(1), // Can be any integer from 1 to 32 .CLKFX_MULTIPLY(4), // Can be any integer from 2 to 32 .CLKIN_DIVIDE_BY_2("FALSE"), // TRUE/FALSE to enable CLKIN divide by two feature .CLKIN_PERIOD(0.0), // Specify period of input clock .CLKOUT_PHASE_SHIFT("NONE"), // Specify phase shift of NONE, FIXED or VARIABLE .CLK_FEEDBACK("1X"), // Specify clock feedback of NONE, 1X or 2X .DESKEW_ADJUST("SYSTEM_SYNCHRONOUS"), // SOURCE_SYNCHRONOUS, SYSTEM_SYNCHRONOUS or // an integer from 0 to 15 .DFS_FREQUENCY_MODE("LOW"), // HIGH or LOW frequency mode for frequency synthesis .DLL_FREQUENCY_MODE("LOW"), // HIGH or LOW frequency mode for DLL .DUTY_CYCLE_CORRECTION("TRUE"), // Duty cycle correction, TRUE or FALSE .FACTORY_JF(16'hC080), // FACTORY JF values .PHASE_SHIFT(0), // Amount of fixed phase shift from -255 to 255 .STARTUP_WAIT("FALSE") // Delay configuration DONE until DCM LOCK, TRUE/FALSE ) DCM_inst ( .CLK0(CLK0_BUF), // 0 degree DCM CLK output .CLK180(), // 180 degree DCM CLK output .CLK270(), // 270 degree DCM CLK output .CLK2X(), // 2X DCM CLK output .CLK2X180(), // 2X, 180 degree DCM CLK out .CLK90(), // 90 degree DCM CLK output .CLKDV(CLKDV_BUF), // Divided DCM CLK out (CLKDV_DIVIDE) .CLKFX(), // DCM CLK synthesis out (M/D) .CLKFX180(), // 180 degree CLK synthesis out .LOCKED(), // DCM LOCK status output .PSDONE(), // Dynamic phase adjust done output .STATUS(), // 8-bit DCM status bits output .CLKFB(CLKFB_IN), // DCM clock feedback .CLKIN(CLKIN_IBUFG), // Clock input (from IBUFG, BUFG or DCM) .PSCLK(1'b0), // Dynamic phase adjust clock input .PSEN(1'b0), // Dynamic phase adjust enable input .PSINCDEC(1'b0), // Dynamic phase adjust increment/decrement .RST(1'b0) // DCM asynchronous reset input ); `elsif XILINX_DCM_SP DCM_SP #( .CLKDV_DIVIDE(divisor), // Divide by: 1.5,2.0,2.5,3.0,3.5,4.0,4.5,5.0,5.5,6.0,6.5 // 7.0,7.5,8.0,9.0,10.0,11.0,12.0,13.0,14.0,15.0 or 16.0 .CLKFX_DIVIDE(1), // Can be any integer from 1 to 32 .CLKFX_MULTIPLY(4), // Can be any integer from 2 to 32 .CLKIN_DIVIDE_BY_2("FALSE"), // TRUE/FALSE to enable CLKIN divide by two feature .CLKIN_PERIOD(0.0), // Specify period of input clock .CLKOUT_PHASE_SHIFT("NONE"), // Specify phase shift of NONE, FIXED or VARIABLE .CLK_FEEDBACK("1X"), // Specify clock feedback of NONE, 1X or 2X .DESKEW_ADJUST("SYSTEM_SYNCHRONOUS"), // SOURCE_SYNCHRONOUS, SYSTEM_SYNCHRONOUS or // an integer from 0 to 15 .DLL_FREQUENCY_MODE("LOW"), // HIGH or LOW frequency mode for DLL .DUTY_CYCLE_CORRECTION("TRUE"), // Duty cycle correction, TRUE or FALSE .PHASE_SHIFT(0), // Amount of fixed phase shift from -255 to 255 .STARTUP_WAIT("FALSE") // Delay configuration DONE until DCM LOCK, TRUE/FALSE ) DCM_SP_inst ( .CLK0(CLK0_BUF), // 0 degree DCM CLK output .CLK180(), // 180 degree DCM CLK output .CLK270(), // 270 degree DCM CLK output .CLK2X(), // 2X DCM CLK output .CLK2X180(), // 2X, 180 degree DCM CLK out .CLK90(), // 90 degree DCM CLK output .CLKDV(CLKDV_BUF), // Divided DCM CLK out (CLKDV_DIVIDE) .CLKFX(), // DCM CLK synthesis out (M/D) .CLKFX180(), // 180 degree CLK synthesis out .LOCKED(), // DCM LOCK status output .PSDONE(), // Dynamic phase adjust done output .STATUS(), // 8-bit DCM status bits output .CLKFB(CLKFB_IN), // DCM clock feedback .CLKIN(CLKIN_IBUFG), // Clock input (from IBUFG, BUFG or DCM) .PSCLK(1'b0), // Dynamic phase adjust clock input .PSEN(1'b0), // Dynamic phase adjust enable input .PSINCDEC(1'b0), // Dynamic phase adjust increment/decrement .RST(1'b0) // DCM asynchronous reset input ); `elsif XILINX_DCM_ADV DCM_ADV #( .CLKDV_DIVIDE(divisor), // Divide by: 1.5,2.0,2.5,3.0,3.5,4.0,4.5,5.0,5.5,6.0,6.5 // 7.0,7.5,8.0,9.0,10.0,11.0,12.0,13.0,14.0,15.0 or 16.0 .CLKFX_DIVIDE(1), // Can be any integer from 1 to 32 .CLKFX_MULTIPLY(4), // Can be any integer from 2 to 32 .CLKIN_DIVIDE_BY_2("FALSE"), // TRUE/FALSE to enable CLKIN divide by two feature .CLKIN_PERIOD(10.0), // Specify period of input clock in ns from 1.25 to 1000.00 .CLKOUT_PHASE_SHIFT("NONE"), // Specify phase shift mode of NONE, FIXED, // VARIABLE_POSITIVE, VARIABLE_CENTER or DIRECT .CLK_FEEDBACK("1X"), // Specify clock feedback of NONE, 1X or 2X .DCM_AUTOCALIBRATION("TRUE"), // DCM calibration circuitry "TRUE"/"FALSE" .DCM_PERFORMANCE_MODE("MAX_SPEED"), // Can be MAX_SPEED or MAX_RANGE .DESKEW_ADJUST("SYSTEM_SYNCHRONOUS"), // SOURCE_SYNCHRONOUS, SYSTEM_SYNCHRONOUS or // an integer from 0 to 15 .DFS_FREQUENCY_MODE("LOW"), // HIGH or LOW frequency mode for frequency synthesis .DLL_FREQUENCY_MODE("LOW"), // LOW, HIGH, or HIGH_SER frequency mode for DLL .DUTY_CYCLE_CORRECTION("TRUE"), // Duty cycle correction, "TRUE"/"FALSE" .FACTORY_JF(16'hf0f0), // FACTORY JF value suggested to be set to 16’hf0f0 .PHASE_SHIFT(0), // Amount of fixed phase shift from -255 to 1023 .SIM_DEVICE(`XILINX_DCM_COMPONENT), // Set target device, "VIRTEX4" or "VIRTEX5" .STARTUP_WAIT("FALSE") // Delay configuration DONE until DCM LOCK, "TRUE"/"FALSE" ) DCM_ADV_inst ( .CLK0(CLK0_BUF), // 0 degree DCM CLK output .CLK180(), // 180 degree DCM CLK output .CLK270(), // 270 degree DCM CLK output .CLK2X(), // 2X DCM CLK output .CLK2X180(), // 2X, 180 degree DCM CLK out .CLK90(), // 90 degree DCM CLK output .CLKDV(CLKDV_BUF), // Divided DCM CLK out (CLKDV_DIVIDE) .CLKFX(), // DCM CLK synthesis out (M/D) .CLKFX180(), // 180 degree CLK synthesis out .DO(), // 16-bit data output for Dynamic Reconfiguration Port (DRP) .DRDY(), // Ready output signal from the DRP .LOCKED(), // DCM LOCK status output .PSDONE(), // Dynamic phase adjust done output .CLKFB(CLKFB_IN), // DCM clock feedback .CLKIN(CLKIN_IBUFG), // Clock input (from IBUFG, BUFG or DCM) .DADDR(7'h00), // 7-bit address for the DRP .DCLK(1'b0), // Clock for the DRP .DEN(1'b0), // Enable input for the DRP .DI(16'h0000), // 16-bit data input for the DRP .DWE(1'b0), // Active high allows for writing configuration memory .PSCLK(1'b0), // Dynamic phase adjust clock input .PSEN(1'b0), // Dynamic phase adjust enable input .PSINCDEC(1'b0), // Dynamic phase adjust increment/decrement .RST(1'b0) // DCM asynchronous reset input ); `endif // !XILINX_DLL/XILINX_DCM/XILINX_DCM_SP/XILINX_DCM_ADV `endif // !XILINX_FPGA endmodule