出现"i is not a constant"（i不是一个常量）的错误是因为作者在索引表达式中使用了非常量的变量。
这个错误的直接原因是 Verilog 不支持 Data_i[i*8-1:i*8-8] 这种语法。如果把向量的位选取写成 v...
但是当我运行"do system.do“来编译设计时,它会显示如下错误, # ** Error: I:/programming/EDK/project_4/pcores/instruction_side_v1_00_a/hdl/verilog/StallUnit.v(6): (vlog-2163) Macro `MAX_STALL_CYCLES_LOG is undefined. 浏览0提问于2012-12-23得票数 1 1回答 Python中gdalbuildvr...
library ieee;use ieee.std_logic_1164.all;entity ex isport (a1,a2,a3,a4 : in std_logic ;outy: out std_logic );end ex;architecture rtl of ex isprocedure nand4a(a,b,c,d:in std_logic;signal y:out std_logic) isbegin y=not(a and b and c and d);end procedure;beginnand4a(a1,...
I have the following verilog code within a genvar, although the variable 'j' is not a genvar variable. When I check the syntax (using Xilinx) I receive the error "Illegal condition expression in generate if statement" on the line with the 'if' statement. Changing 'j' to a genvar variab...
input i_a, input [3:0] i_b, input i_en, output o_out, inout [3:0] o_c //your input/ouput/inout ports ); //your sequential logic always@(posedge i_clk) begin //your sequential logic end //your combinational logic always@(*) begin ...
output [3:0] a; // 4-bit output wire. Type is 'wire' unless specified otherwise. wire [0:7] b; // 8-bit wire where b[0] is the most-significant bit. <aside> ⚠️ 方括号左边的数总是代表最高有效位。 </aside> 向量域的选择 ...
The ActionLink is created when the page is first rendered. It...Auto margins not accounting for svg width I am coding a navbar for my site, and am using auto margins to align the logo to the left the links to the center and a search icon to the right. It works perfectly except ...
ERROR:Simulator:702 - Can not find design unit work.glbl ... when attempting Post-Route in ISim I am trying to run my project in Post-Route simulation. The behavioral simulation works fine and I want it to work on the Spartan 3E Starter board. It also is able to Ge...
10630 - SimPrim, Timing Simulation - What is a "$width" violation, and how do I fix it? (VHDL, Verilog) Description General Description: What is a "$width" violation, and how do I correct it? Solution In back-annotated (timing) simulation, the timing informati...