jkff.v

键盘控制电路

//----------------------------------------
//JK Flip-Flop
//Filename : JKFF.v
//----------------------------------------
module JKFF(clk, rst, j, k, q);
input clk, rst, j, k;
output q;


reg tq;

always @(posedge clk or posedge rst)
   begin
      if (rst)
	   tq = 1'b0;
	 else if (j==1'b0 && k==1'b1)
	   tq = 1'b0;
      else if (j==1'b1 && k==1'b0)
	   tq = 1'b1;
      else if (j==1'b1 && k==1'b1)
	   tq = ~tq;
	 else
	   tq = tq;
    end

assign q = tq;

endmodule