module Control (clk1,clk2,clrn,re,oe,sel); input clk1,clk2,clrn; output [2:0] sel; output re,oe; reg [1:0] state; reg [2:0] sel; reg re,oe,reset; parameter Swait0=2'b00, S0=2'b01, S1=2'b10, Swait1=2'b11; always @ (posedge clk2 or negedge clrn) if(!clrn) begin state = Swait0; oe=0; sel=0; reset=0; end else case (state) Swait0: if (!clk1) begin oe=0;sel=0;reset=0; end else begin state=S0;oe=0;reset=1; end S0: if (sel sel=sel+1;reset=1;oe=0; end else begin state = S1;reset=1;oe=1; end S1: if (clk1) begin state=Swait1;oe=0 ; end else begin state = Swait0;oe=0;sel=0;reset=0; end Swait1: if (!clk1) begin state=Swait0;oe=0;sel=0;reset=0; end default:begin state=Swait0;oe=0;sel=0;reset=0; end endcase endmodule
