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我有一個7位向上/向下計數器用Verilog代碼的端口:如何寫一個測試平臺多維數組
module updowncount_7bit (clock,reset,hold,up_down,q);
input clock,reset,hold,up_down;
output reg [6:0] q;
integer direction;
always @(posedge clock)
begin
if(up_down)
direction = 1;
else
direction = -1;
if (!reset)
q <= 0;
else if (!hold)
q <= q + direction;
end
endmodule
我試圖寫一個測試平臺代碼,但它似乎輸出做不工作,我不知道爲什麼!任何人都可以幫忙!?
的測試臺結果:
在型號-SIM:
在的Quartus由Vector波形:
module counter_7bit_tb;
wire [6:0]f_tb;
reg clock_in_tb, reset_tb, hold_tb, up_down_tb;
updowncount_7bit dut(clock_in_tb, reset_tb,hold_tb, up_down_tb, f_tb);
initial begin
clock_in_tb = 0;reset_tb= 1; hold_tb = 0;up_down_tb=1;
#10;
forever begin
#10 clock_in_tb= ~clock_in_tb ;
end
end
endmodule
謝謝!它現在工作:D – 2013-03-24 06:16:54