请教一个7分频编译遇到的问题!

只看该作者 · 2009-4-12 23:06

在编译是老是报:Error (10028): Can't resolve multiple constant drivers for net "cout1" at div7.v(19)
Error (10029): Constant driver at div7.v(33)
Error: Can't elaborate top-level user hierarchy
Error: Quartus II Analysis & Synthesis was unsuccessful. 3 errors, 4 warnings
    Error: Processing ended: Sun Apr 12 22:54:01 2009
    Error: Elapsed time: 00:00:00
我是新手问一下,我定义的不是常量啊!!

module div7(clkin,reset,clkout);
    input    clkin,reset;
    output    clkout;
    reg[2:0] m,n;
    reg        cout1,cout2;
    assign    clkout=cout1|cout2;
    always @(posedge clkin)
        begin
        if(!reset) begin cout1<=0;
                     m<=0; end
        else if(reset)
            begin
            if(m==6) begin m<=0;end
            else m<=m+1;
            if(m==2) cout1=~cout1;
            else if(m==5) cout1=~cout1;
            end

        end

    always @(negedge clkin)
        begin
        if(!reset) begin cout2<=0;
                     n<=0; end
        else if(reset)
            begin
            if(n==6) begin n<=0;end
            else n<=n+1;
            if(n==2) cout1=~cout1;
            else if(n==5) cout1=~cout1;
            end

        end
endmodule