FPGA学习笔记15--两种并行执行块

  module paral1(q,a,clk); 

        output q,a; 

        input clk; 

        reg q,a;
        initial q<=0; 

        always @(posedge clk) 

                begin 

                q=~q; 

                end 

        always @(posedge clk) 

                begin 

                a=~q; 

                end 

        endmodule 

`timescale 1ns / 1ns
module paral_tst(
    );
    wire q,a;
    reg clk;
    paral1 u1(.q(q),.a(a),.clk(clk)); 
    initial clk<=1'b0;
    always #10 clk<=~clk;
    
endmodule

module paral2(
q,a,clk
    );
        output q,a; 

        input clk; 

        reg q,a; 
initial q<=0;
        always @(posedge clk) 

                begin 

                a=~q; 

                end 

        always @(posedge clk) 

                begin 

                q=~q; 

                end 

endmodule

`timescale 1ns / 1ns
//////////////////////////////////////////////////////////////////////////////////
// Company: 
// Engineer: 
// 
// Create Date: 2020/02/24 12:04:54
// Design Name: 
// Module Name: tst
// Project Name: 
// Target Devices: 
// Tool Versions: 
// Description: 
// 
// Dependencies: 
// 
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
// 
//////////////////////////////////////////////////////////////////////////////////


module tst(
    );
    wire a,q;
    reg clk;
    paral2 u1 (.clk(clk),.a(a),.q(q));
    initial begin
    clk<=1'b0;
    end
    always #10 clk<=~clk;
endmodule