115 lines
2.7 KiB
Verilog
115 lines
2.7 KiB
Verilog
//-----------------------------------------------------
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// Design Name : static_dff
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// File Name : ff.v
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// Function : D flip-flop with asyn reset and set
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// Coder : Xifan TANG
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//-----------------------------------------------------
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//------ Include defines: preproc flags -----
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`include "./SRC/fpga_defines.v"
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module static_dff (
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/* Global ports go first */
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input set, // set input
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input reset, // Reset input
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input clk, // Clock Input
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/* Local ports follow */
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input D, // Data Input
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output Q // Q output
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);
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//------------Internal Variables--------
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reg q_reg;
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//-------------Code Starts Here---------
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always @ ( posedge clk or posedge reset or posedge set)
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if (reset) begin
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q_reg <= 1'b0;
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end else if (set) begin
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q_reg <= 1'b1;
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end else begin
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q_reg <= D;
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end
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// Wire q_reg to Q
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assign Q = q_reg;
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endmodule //End Of Module static_dff
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//-----------------------------------------------------
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// Design Name : scan_chain_dff
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// File Name : ff.v
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// Function : D flip-flop with asyn reset and set
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// Coder : Xifan TANG
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//-----------------------------------------------------
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module sc_dff (
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/* Global ports go first */
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input set, // set input
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input reset, // Reset input
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input clk, // Clock Input
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/* Local ports follow */
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input D, // Data Input
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output Q, // Q output
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output Qb // Q output
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);
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//------------Internal Variables--------
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reg q_reg;
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//-------------Code Starts Here---------
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always @ ( posedge clk or posedge reset or posedge set)
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if (reset) begin
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q_reg <= 1'b0;
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end else if (set) begin
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q_reg <= 1'b1;
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end else begin
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q_reg <= D;
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end
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// Wire q_reg to Q
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assign Q = q_reg;
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assign Qb = ~Q;
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endmodule //End Of Module static_dff
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//-----------------------------------------------------
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// Design Name : scan_chain_dff compact
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// File Name : ff.v
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// Function : Scan-chain D flip-flop without reset and set //Modified to fit Edouards architecture
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// Coder : Xifan TANG
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//-----------------------------------------------------
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module sc_dff_compact (
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/* Global ports go first */
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input reset, // Reset input
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//input set, // set input
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input clk, // Clock Input
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/* Local ports follow */
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input D, // Data Input
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output Q, // Q output
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output Qb // Q output
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);
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//------------Internal Variables--------
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reg q_reg;
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//-------------Code Starts Here---------
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always @ ( posedge clk or posedge reset /*or posedge set*/)
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if (reset) begin
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q_reg <= 1'b0;
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//end else if (set) begin
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// q_reg <= 1'b1;
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end else begin
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q_reg <= D;
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end
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/*
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// Wire q_reg to Q
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assign Q = q_reg;
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assign Qb = ~Q;
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*/
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`ifndef ENABLE_FORMAL_VERIFICATION
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// Wire q_reg to Q
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assign Q = q_reg;
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assign Qb = ~q_reg;
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`else
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assign Q = 1'bZ;
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assign Qb = !Q;
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`endif
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endmodule //End Of Module static_dff
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