Parameters are Verilog constructs that allow a module to be reused with a different specification. For example, a 4-bit adder can be parameterized to accept a value for the number of bits and new parameter value
module badcode;parameter P; initial $display(P); endmodule module goodcode; parameter P= 0; initial $display(P); endmodule Parameters width mismatch SVH flags an error if a parameter with a defined width is declared is assigned a value of differing width (rule 48). ...
In order to use parameterized interfaces, you must use generic interfaces in the module using the parameterized interface.. I do that now, and it works great. module top(..); IParallel# (.DataWidth(16)) ipar(); Useit inst(.if_par(ipar.Destination)); SrcIt sinst(...
parameter FIFO_DEPTH = 256, MAX_WIDTH = 32; // Declares two parameters parameter [7:0] f_const = 2'b3; // 2 bit value is converted to 8 bits; 8'b3 1. 2. 3. 4. 5. 6. 7. 参数基本上是常量,因此在运行时修改它们的值是非法的。重新声明一个已经被net、变量或其他参数使用的名称是...
// A Verilog parameter allows to control the width of an instantitated // block describing register logic // // // File:parameter_1.v // module myreg (clk, clken, d, q); parameter SIZE = 1; input clk, clken; input [SIZE-1:0] d; output reg [SIZE-1:0] q; always @(posed...
A parameter can be modified with the defparam statement or in the module instance statement. Typical uses of parameters are to specify delays and width of variables. See 12.2 for details on parameter value assignment.参数表示常量;因此,在运行时修改它们的值是非法的。但是,可以在编译时修改模块参数,...
If we have multiple parameters, and if we need to change the value of one of the parameters, we will have to list all the parameters in the order of their appearance. Consider the following example module regexample (q, d, clk, rst_n); parameter Trst = 1, Tckq = 1, N = 4, ...
Verilog parameters were introduced in Verilog-2001 (not present in the original Verilog-1995). They allow a single piece of Verilog module code to be more extensible and reusable. Each instantiation of a Verilog module can supply different values to the parameters, creating different variations of...
Classes with ParametersSimilar to a module or a function, a class can be parameterized. The rationale behind parameterizing a class is also the same: it allows you to avoid writing repeatative code that are similar to each other but differ only in certain parameters. A...
parameter MSB=7;// MSB is a parameter with a constant value 7parameter REAL=4.5;// REAL holds a real numberparameter FIFO_DEPTH=256,MAX_WIDTH=32;// Declares two parametersparameter[7:0]f_const=2'b3; // 2 bit value is converted to 8 bits; 8'b3 ...