Q<=1;Q_tmp<=1;endelsebeginif(enable)beginif(Q==12)begin Q<=1;Q_tmp<=1;endelsebegin Q<=Q+1;Q_tmp<=Q_tmp+1;end end end end always @(*)beginif(reset||(Q==12&&c_enable))begin c_load<=1;endelsebegin c_load<=0;end end count4 the_counter(clk,c_enable,c_load,c_d,Q...
q<=4'd0;endelseif(ena)beginif(q==4'd5)q<=4'd0;elseq<=q+1'b1;end end endmodule modulecounter10(input clk,input reset,input ena,output reg[3:0]q);always@(posedge clk)beginif(reset)begin q<=4'd0;endelseif(ena)beginif(q==4'd9)q<=4'd0;elseq<=q+1'b1;end end endmodule...
2)仅当counter0计数10次(q0==4’d9)时,counter1计数1次,也就是counter0计数10个时钟周期后,下一时钟周期counter1计数,c_enable[1]=1’b1; 3)当counter1计数10次时(q1==4’d9),counter1会保存q1==4’d9十个时钟周期才会变回0,即需要counter0==4’d9才会再次变化。所以counter2有效的时钟周期为coun...
1 Combinational Logic 1.1 Basic Gates 1.1.1 Exams/m2014 q4h module top_module ( input in, output out); assign out = in; endmodule 1.1.2 Exams/m2014 q4
q<=4'd0;endelseif(ena)beginif(q==4'd5)q<=4'd0;elseq<=q+1'b1;end end endmodule modulecounter10(input clk,input reset,input ena,output reg[3:0]q);always@(posedge clk)beginif(reset)begin q<=4'd0;endelseif(ena)beginif(q==4'd9)q<=4'd0;elseq<=q+1'b1;end ...
ten,hundred; bcdcount counter0 (clk, reset, c_enable[0] , one); bcdcount counter1 (clk, reset, c_enable[1] , ten); bcdcount counter2 (clk, reset, c_enable[2] , hundred); assign OneHertz = (hundred == 4'd9) && (ten == 4'd9) && (one ...
当q1==4'b1001时,计数器counter1需要在下一个使能信号c_enable[1]到来,也就是系统时钟再过10拍counter0数到4'b1001时//才能输出使能信号c_enable[2]使得q2+1module top_module ( input clk, input reset, output OneHertz, output [2:0] c_enable ); wire [3:0]q0, q1, q2; //错误代码 ...
3.2.2.5 Counter1000 用4bit的BCD码实现个、十、百的计数,当计数1000次后,OneHertz输出为1 通过例化如下`module`实现该功能 当个位计数10次,十位计数1次 当十位计数10次,百位计数1次 moduletop_module(inputclk,inputreset,outputOneHertz,output[2:0]c_enable);//wire[3:0]one,ten,hundred;assignc_enable...
3.2.2.5 Counter 1-12(Exams/ece241 2014 q7a) module top_module ( input clk, input reset, input enable, output [3:0] Q, output c_enable, output c_load, output [3:0] c_d ); assign c_enable = enable; assign c_load = reset | ((Q == 4'd12) && enable == 1'b1); assign ...
范围定义可选,若没有定义,则默认为1位寄存器。 reg signed [63 : 0] m;//64位带符号的值 整数(integer) 整数是一种通用的寄存器数据类型,默认位宽为宿主机的字的位数,但最小应为12位。整形类型为有符号数。 integer counter; initial counter = -1; ...