注意:这里使用 iverilog 只有按下 ctrl+s 进行保存之后才能够检查报错,按下 ctrl+~ 可以查看报错信息,但是有一点问题就是即使代码全部正确也有可能出现报错,报错信息为:Unknown module type ,所以需要在插件配置的时候添加 -i 指令,这样可以避免这种报错,但是这样就会屏蔽所有报错: 安装Verilog_Testbench 插件 安装插件...
1.下载后先运行X-HDL-4.2.1-Setup.exe文件，选择安装路径，注意路径中不要有中文。 2.运行crack_...
//define.svmoduletop;`defineGOOD 0`defineBAD 1typedefenum{G = `GOOD, B = `BAD } sometype;classsomeclass;randsometype e;endclass// foosomeclass c;initialbeginc =new;void'(c.randomize());$display("Enum value is %s and it's numeric value is %d", c.e.name(), c.e);endendmodule/...
问题出在：module 201612061(clk,reset,clkout)原因：模块命名不能数字开头。命名规则：1、 模块名只能是字母（A-Z，a-z）和数字（0-9）或者下划线（_）组成。2、 模块名必须是字母或者下划线开头，不能数字开头。3、 不能使用verilog关键字来命名，以免冲突。4、 模块名区分大小写。可以改为：modul...
case(sig)1'b0:beginresult=0;end1'b1:beginresult=flaga;end1'bx,1'bz:beginresult=flaga?'bx:0;enddefaultresult='bx;endcasecase(sig)1'bz:begin$display("signal is floating");end1'bx:begin$display("signal is unknown");enddefault:begin$display("signal is %b",sig);endendcase ...
$isunknown(dout))); // Check if ack arrives 3 to 5 clocks after a request assert property (@(posedge clk) req |-> ##[3:5] ack); // check if interrupt propagates when intr is enabled generate for (i=0; i < 16; i++) begin: INTR0 Intr0 : assert property (@(posedge clk)...
the system may default it to a larger value (such as 32 bits), which may result in a very large logic gate-level netlist, some of which are unnecessary, which will cause resources Waste. Operators related to unknown logic x and high-impedance state z cannot be converted, for example ==...
and both equations are scheduled to execute in the same simulation time step, such as on the same clock edge. If blocking assignments are not properly ordered, a race condition can occur. When blocking assignments are scheduled to execute in the same time step, the order execution is unknown...
An assertion error is triggered but the simulator doesn't stop prematurely and therefore vunit doesn't detect the error. I did change the CHECK_EQUAL(x,y) to 'if( x != y) $fatal("this failed");' and that allowed vunit to detect the error, but doesn't feel like the right solution...
1、`define BPS_PAR_2 2604 //波特率为9600时的分频计数值的一半，用于数据采样2、 else if(cnt == `BPS_PARA_2) clk_bps_r <= 1'b1; 这二行，你看出错误了吗？你定义的是BPS_PAR_2，但是你写成了BPS_PARA_2。改为 else if(cnt == `BPS_PAR_2) clk_bps_r <= 1'b1;