按鍵調(diào)整燈的亮度

1、inputclr,clk,ctrl;output7:0q;reg7:0q;wire new_clk=clk/ctrl? a1? ya?0?Y? always(posedge new_clk or negedge clr)/o?if(!clr)begin q=8h50;endelse if(q=8h99)q=0;else if(q=8h?9)q=q+4h7;else q=q+1b1;endmodulemodule debounce(clk,key_in,key_out);/ ?￥? /parameterwidth=0;inputclk;inputkey_in;/width-1:0outputke

2、y_out;regdout1,dout2,dout3;assign key_out=(dout1&dout2&dout3);/ ?D￥? ? ￥? ? / ?a?1? ?a ? ? ? a?dout1&dout2&dout3always(posedge clk)begin/? ?a?a1? ? ? ? a?dout1|dout2|dout3dout1=key_in;dout2=dout1;1/ 5 dout3= 26H17D7840) begin c=0;cko=!cko;end/50M ? ?26H17D7840else c=c+f;endendmodulemodule mux2(a1,a2

3、,sel,out);input3:0a1,a2;inputsel;output3:0 out;assign out=sel?a2:a1;endmodulemodule pwm(clr,clk,data,led);/100? ? ?y?3/ 5 inputclr,clk; input7:0data;outputled;reg7:0q;assign led=(qdata)?1b1:0;always(posedge clk or negedge clr)/o?if(!clr)begin q=8h00;endelse if(q=8h99)q=0;else if(q=8h?9)q=q+4h7;else

4、q=q+1b1;endmodulemodule pwm_top(clr,clk,ctrl,a,b,c,d,e,f,g,sel,led);/?y?inputclr,clk,ctrl;outputa,b,c,d,e,f,g,sel,led;wire se,clkp,wctrl;wire3:0din;wire7:0q100;div_clk1(.cki(clk),.f(2d3),.cko(se), clk2(.cki(clk),.f(12d1000),.cko(clkp); debouncedeb(.clk(clkp),.key_in(ctrl),.key_out(wctrl);/ ?￥ ? pwm(.clr(clr),.clk(clkp),.data(q100),.led(led);/4/ 5scan(.clk(clkp),.q(sel);mux2(.a1(q1003:0),.a2(q1007:4),.sel(sel),.out(din);deled(.in(din),.a(a),.b(b),.c(c),.d(d),.e(e),.f(f),.g(g);endmodulemodule scan(clk,q