Verilog 常见 Error
ERROR: port connections cannot be mixed ordered and named
错误提示：端口连接无法混合排序和命名
错误原因：模块例化格式不规范，常见包括①端口前缺少“.”; ②例化结束多余“,”
错误提示通常会出现在子模块例化末尾，即报错提示行数在129行。
ERROR: concurrent assignment to a non-net 'dout_x' is not permitted
错误提示：不允许并发分配给非网线“xxx”
错误原因：模块例化后之间的连接应采用“wire”类型，错误使用“reg”
ERROR: if-condition does not match any sensitivity list edge
错误提示：如果条件与任何敏感度列表边缘都不匹配
错误原因：always语句中，定义了不同的边缘判断，但在语句块中缺用或者漏用。
- Search forums
- Solveforum All topics
Vivado Verilog Simulation error: concurrent assignment to a non-net is not permitted
- Thread starter ALUW
- Start date Dec 4, 2022
- Dec 4, 2022
SolveForum.com may not be responsible for the answers or solutions given to any question asked by the users. All Answers or responses are user generated answers and we do not have proof of its validity or correctness. Please vote for the answer that helped you in order to help others find out which is the most helpful answer. Questions labeled as solved may be solved or may not be solved depending on the type of question and the date posted for some posts may be scheduled to be deleted periodically. Do not hesitate to share your thoughts here to help others. Click to expand...
Recent Threads
Why is it okay for my .bashrc or .zshrc to be writable by my normal user.
- Zach Huxford
- Jun 26, 2023
SFTP user login details real-time filtering
- Amal P Ramesh
get nat port forwarding IP address
Using docker does not give error with sudo but using ctr does on starting a container, what are some of the latest nike soccer shoes that have gained popularity among players and enthusiasts in recent years, can't change tcp/ipv4 settings on windows 10.
Customer service access 2007 template
- tintincutes
Latest posts
- Latest: sebas
- 30 minutes ago
- Latest: Gleb
- Today at 9:13 PM
- Latest: Arne
- Today at 9:02 PM
- Latest: user10325153
- Latest: Xyz.WebDeveloper
Newest Members
赛灵思中文社区论坛欢迎您 (Archived) — drsdrb (Member) asked a question.
- `timescale 1ns / 1ps
- //////////////////////////////////////////////////////////////////////////////////
- // Company:
- // Engineer:
- // Create Date: 2020/10/26 10:46:51
- // Design Name:
- // Module Name: top
- // Project Name:
- // Target Devices:
- // Tool Versions:
- // Description:
- // Dependencies:
- // Revision:
- // Revision 0.01 - File Created
- // Additional Comments:
- module top(
- reg[7:0] a;
- reg[7:0] b;
- always@*begin
- son son1(.a(a),.b(b));
- // Create Date: 2020/10/26 10:48:39
- // Module Name: son
- module son(
- //input clk,
- input [7:0]a,
- output reg[7:0]b
- reg [7:0] aa;
- reg [7:0] bb;
- bb = aa\+1;
yangc (AMD)
- reg [ 7 : 0 ] b ;
- wire [ 7 : 0 ] b ;
drsdrb (Member)
Related Questions
Community Feedback?
IMAGES
VIDEO
COMMENTS
The trailing comma in a port list is illegal. Change: output wire c, to: output wire c. It is illegal to assign a value to an input port inside a module. This is illegal: a=1'b1. Assuming it was a typo to use a there, and you really meant to type c, you should change: assign c=(a>b)?(a=1'b1):(c=1'b0);
Concurrent assignment to a non-net is not permitted. Ask Question Asked 6 years, 1 month ago. Modified 2 years, 1 month ago. Viewed 28k times 1 I'm making module that make results according to cmd using 4 32-bit adder. if cmd is 0, dout0 = a0+b0, and other dout is zero if cmd is 1, dout1 = a1+b1 and other dout is zero. if cmd is 2 or 3 likewise ...
Another thing to note is when instantiating verilog primitives, the portmapped signals which are used should be of net datatype. I tried this test case with above declaration and able to simulate it properly with expected output P[0] from AND gate.
ERROR: concurrent assignment to a non-net 'dout_x' is not permitted . 错误提示：不允许并发分配给非网线"xxx" 错误原因：模块例化后之间的连接应采用"wire"类型，错误使用"reg" ERROR: if-condition does not match any sensitivity list edge . 错误提示：如果条件与任何敏感度列表边缘都 ...
Module puts need to be connected to a net-type (ex wire). However a wire cannot be assigned in a procedural code (ex always block). So you need to think how to assign some bits to from a module and other from procedural. \$\endgroup\$
Please include at least the portlist definition for sub-module Mul_demul. My guess is on this sub-module, port "s1" is an output. Or since you're using port connection by position, instead of port connection by name, and you're connecting up to the wrong ports.
The types reg, wire only apply in the current module and are not carried over port connections. Remember the choice of wire or reg is for the simulator not indicative of the hardware. In SystemVerilog the majority of wire/reg can be replaced with logic. The only place this does not work is for tristate busses then you should use tri.
Concurrent assignment to a non-net a is not permitted . ERROR:Simulator:778 - Static elaboration of top level Verilog design unit(s) in library work failed. How can I resolve it ? ... Target <tr26> of concurrent assignment or output port connection should be a net type. 0. ... Are there non-antisymmetric solutions to the electronic Hamiltonian?
一个案例： 待测试模块输入输出为： TestBench测试文件为： 一仿真，报错 concurrent assignment to a non-net 'xxxx' is not permitted 原因分析： 对于待测试模块的输出 "dout_7888"，在编写测试文件的时候，不能将与之交联的"dout_7888"定义为 reg 型，须改为 wire 型。 对于模块中的输出来说 即，不能以 TestBench ...
文章浏览阅读2.2w次，点赞16次，收藏52次。一个案例：待测试模块输入输出为：TestBench测试文件为：一仿真，报错 concurrent assignment to a non-net 'xxxx' is not permitted原因分析：对于待测试模块的输出 "dout_7888"，在编写测试文件的时候，不能将与之交联的"dout_7888"定义为 reg 型，须改为 wire 型。
一个案例： 待测试模块输入输出为： TestBench测试文件为： 一仿真，报错 concurrent assignment to a non-net 'xxxx' is not permitted 原因分析： 对于待测试模块的输出 "dout_7888"，在编写测试文件的时候，不能将与之交联的"dout_7888"定义为 reg 型，须改为 wire 型。 对于模块中的输出来说 即，不能以 TestBench ...
Non-net variables are not allowed to be used in concurrent assignments. You should use 'wire' instead of 'reg' for 'a' and 'b'. Also, the ternary operator should be modified to assign the value of 'c' instead of 'a' when the condition is true.
You cannot drive a reg type via a continuous assignment (only a wire may be driven in this way).. If this is just modelling combinatorial logic, you could use a combinatorial always block: always @* begin mem[in_d0_] = in_d1_; end
Dec 4, 2022. #1. ALUW Asks: Vivado Verilog Simulation error: concurrent assignment to a non-net is not permitted. I am new to using verilog and am getting the errors concurrent assignment to a non-net 'sample' is not permitted, concurrent assignment to a non-net 'rst' is not permitted, and concurrent assignment to a non-net 'rst' is not permitted.
I still remember the Aha! moment when I understood how UNIX shell pipeline works.I fell headlong in love with Linux and the command line and tried out many combination filters (a filter is a program reading from standard input and writes to standard output) connected via pipes.I was amazed by the creativity and power brought about by the command line.
You've declared your port as input [3:0] small_mant; - this means you are declaring an input to the module, which must be of a net type (a.k.a. a wire).. However you then re-declare your input port as reg [3:0] small_mant; which is a variable data type (reg), and therefore not a net type.. You cannot, and in fact never need to, declare an input as a reg, so simply remove that line.
谢谢，按照您的方法sim已经不报错了，但是仿真界面的值都是不定态，修改时序后，有了新的错误，我会继续开一个新帖子。
Synchronous logic should use non-blocking (<=) assignments. It is legal syntax to blocking (=) assignments in synchronous logic blocks, but is it not recommenced. Using blocking assignments in synchronous logic blocks may cause race conditions in the simulator resulting in behavioral mismatch between RTL and synthesized circuit.
一个案例： 待测试模块输入输出为： TestBench测试文件为： 一仿真，报错 concurrent assignment to a non-net 'xxxx' is not permitted 原因分析： 对于待测试模块的输出 "dout_7888"，在编写测试文件的时候，不能将与之交联的"dout_7888"定义为 reg 型，须改为 wire 型。 对于模块中的输出来说 即，不能以 TestBench ...