用 ModelSim PE Student Edition 10.0a 成功仿真

参考文章: 

http://hi.baidu.com/282280072/blog/item/ff8d88c36502302de4dd3b3c.html

 花了我好几天，终于把Quartus II时序仿真给解决了。

在仿真时，总是遇到一个奇怪的错误.

vsim -voptargs=+acc work_test.tb
# vsim -voptargs=+acc work_test.tb 
# Loading work_test.tb
# Loading work_test.test
# Loading work_test.cycloneii_io
# Loading work_test.cycloneii_mux21
# Loading work_test.cycloneii_dffe
# Loading work_test.cycloneii_asynch_io
# Loading work_test.cycloneii_lcell_comb
# Loading work_test.cycloneii_lcell_ff
# ** INTERNAL ERROR: mtiarOpen(): Unrecognized file path (test_v_fast.sdo)
# ** Error: (vsim-SDF-3894) test_v_fast.sdo: Compiled SDF file was not found.
# Loading work_test.CYCLONEII_PRIM_DFFE
# ** Error: (vsim-7) Failed to open SDF file "test_v_fast.sdo" in read mode.
# No such file or directory. (errno = ENOENT)
# ** Error: (vsim-SDF-3445) Failed to parse SDF file "test_v_fast.sdo".
#    Time: 0 ps  Iteration: 0  Instance: /tb File: E:/test/simulation/modelsim/tb.v
# Error loading design

终于，我在网上到了解决的办法。

华清远见的视频教程中，授课老师认为这是ModelSim软件本身的问题。

提供的解决办法是：新建Project。把除sdf文件以外的文件添加到工程编译。然后打开start simulation对话框，选design页，选中testbench文件，再点开sdf页，添加sdf文件，选中左下角的两个选项（禁止警告，把错误变成警告）。继续仿真即可。

详细可以看视频教程.

 

测试代码如下:

 

`timescale 1ns/1ns
module tb;
reg clk;
reg rst;
wire div;

test u1(
.clk(clk),
.rst(rst),
.div(div)
);

initial 
begin
	clk=0;
	forever #10 clk=~clk;
end 

initial 
begin
	rst=0;
	#1000 rst=1;
	#1000 stop;
end
endmodule