verilog sequential

One: Generate Verilog-2001 adds a generate loop that allows multiple instantiations of module and primitive, as well as multiple variable,net,task,function,continous assignment, Initial and always. In generate statements, if-else and Case statements can be introduced and different instantiations are produced according to different conditions. Usage: 1. Generate syntax has generate for, genreate if and generate case three 2. Generate for statement must

Block symbol file--, suffix. BSF.Block design file--blocks the file, with the suffix. BdF.The BDF file is designed for the entire design, equivalent to a schematic diagram of the circuit, while the BSF file is implemented for one of the features in the design, equivalent to a component in the schematic diagram.By converting the Verilog HDL file into a BSF file and adding it to the BDF file, it facilitates the modular and visual design of the system.He

When you do chip verification, you will generally encounter the problem of slow simulation speed and low efficiency.A method is now found to debug the above problem. That is, using the NC Profiler tool.With regard to the profiler tool, I post the original document "Cadence®nc-verilog®simulator Help":The Pro?ler is a tool which measures where CPU time is spent during simulation. Although it is developed primarily to help Cadence R diagnose performance

The Verilog ' include and C's include usages are the same, and the difference may lie in that point.Include is usually a file, for Verilog This file is nothing more than a few parameter definitions, soHere are a few more keywords: ' ifdef ' define ' endif (they all bring a point, hehe).They unite to use, really can make your program diversification, take the Brother VGA program say things.First, you can cre

1 , grammarStatement:parameter xx = yy;' Define XX YYUse:Xx' XX2 , ScopeParameter the file that acts on the Declaration, ' define reads from the compiler until the end of the compilation is valid, or the ' undef command invalidates it.If you want parameter or ' define to work on the entire project, you can write the following declaration in a separate file and use ' include to have each file contain a declaration file:' Ifndef XX' Define XX yy//or parameter xx = yy;' EndIf' Define can also be wr

I can't wait to write these things myself. This chapter is essential for the development of hardware. Besides, we have to develop a CPU. ~ ~ often see someone released what Verilog code god Horse, feel very cow. In fact, you can also learn to. Manual up, follow along. In the previous chapters, we learned to design a variety of line diagrams, with levels of abstraction ranging from high to low, functional block level, logic gate level, MOS tube leve

Bcd:binary Coded Decimal is a 4-bit binary encoding that represents a 1-bit decimal number.Definition: BCD code This encoding form uses four bits to store a decimal digit, making the conversion between binary and decimal fast. This coding technique is most commonly used in the design of accounting systems, because the accounting system often requires accurate calculations of long numbers of strings. Relative to the general floating-point notation, the use of BCD code, both to preserve the accura

Many new amplitude statements are added to system Verilog, although they are only applicable to blocking amplitude, but are useful in some situations.Here's an interesting piece of code that covers a few uses.1 Package definitions;2typedef enum LOGIC [2:0] {ADD,SUB,MULT,DIV,SL,SR} opcode_t;3 typedef enum LOGIC {UNSIGNED, signed} operand_type_t;4 typedef union PACKED {5Logic [ at:0] U_data;6Logicsigned[ at:0] S_data;7 } data_t;8 typedef struct PACKED {

Write Verilog many times, should know oneself write code circuit structure is what appearance, the following analysis:Module TB ( input CLK, input rst_n, input de, output [11:0] cntx), Reg [11:0] cntx; Always @ (Posedge CLK or Negedge rst_n) begin if (~rst_n) cntx The circuit structure was seen with synplify:Circuit diagram of the Verilog adder and D flip-flops implemented togeth

Verilog Design AdvancedDate: May 6, 2014 TuesdayMain Harvest:1. Write the first Verilog program yourself.Topic:Using a 10M clock, a single-cycle shape such as the following periodic waveform is designed.Thinking:The first idea is to define two counters to count and two enable flags to control the two variables separately. But this logic is too complicated, search on the internet, or the definition of a coun

For the entire process, Modelsim does not open GUI mode with the Do file command line. When the simulation is finished, the waveform is seen with Debussy, and the speed is quite fast. Dare not to enjoy alone, to share with you all.Debussy and Modelsim Collaborative simulation of the whole process.1. Edit the Modelsim.ini file under the Modelsim root directory; Veriuser = Veriuser.sl replaced by Veriuser = Novas_fli.dll.2. Copy the Novas_fli.dll from the D:\Novas\Debussy\share\PLI\modelsim_fli54\

The difference between parameter (parameter) and define (macro definition) in Verilog Statement format Parameter xx=yy; (with semicolons)' Define XX yy (no semicolon) Function range The parameter is local and works only within the module that it defines, and the macro definition works on multiple files that are compiled at the same time. Even if a macro definition is specified inside a module, it still

-Y, Ireset, ICLK87);88//Cr 596, 1033, 0Mac_3 U2 (IY, ICb, ICr,"h00254," h00409, "h00000,Ireset Z, ICLK94);95Endmodule//-------------------------------------------------Conversion formulaR = 1.164Y + 1.596cr-222.912G = 1.164Y-0.391CB-0.813CR + 135.488B = 1.164Y + 2.018cb-276.928Verilog syntax cannot handle floating-point data, the entire algorithm is zoomed in first and then zoomed out.Now the calculation of the left and right sides to enlarge 512 times times, equivalent to 2^9, that is, R >> 9 =

Verilog supports defining array parameters so that when the project is large, the code can be more concise when the module is instantiated: see examplesModule Dma_controller # (Parameter integer c0_max_mig_bl[3:0] = {2048,2048,2048,2048},Parameter integer c0_app_data_width[3:0] = {64,64,64,64},Parameter integer c0_dma_wr_data_width[3:0] = {16,16,16,16},Parameter integer c0_dma_rd_data_width[3:0] = {16,16,16,16},parameter [1:8*11] c0_read_write[3:0] =

The Implement screen block movement using Verilog Code is as follows: "'" Timescale 1ns/1ps//////////////////////////////////////////////////////////////////////////////////// Company://Engineer:////Create DATE:2017/05/12 20:29:36//Design Name://Module name:vga_test//Project name: Target Devices://Tool Versions://Description:////Dependencies:////Revision://Revision 0.01-file C reated//Additional Comments://///////////////////////////////////////

Recently began to learn Verilog HDL language, right on the hand there is a DE2 from the seniors borrowed an FPGA development board. Take advantage of the holidays to learn. Because there are some C-language basics, it is very fast to look at Verilog HDL syntax. The biggest difference between it and C is that the HDL language has a lot of module, and the module is a parallel relationship . But in some module

) T1 1 0 1 (The result of this signal is 1) (The level changes from low level to high level) T2 1 1 0 (The input pin has a high level and the input signal does not jump from low to high, then this signal results in 0) deduced:l2h_sig=l2h_f1 (! L2H_F2);10ms Delay module: 1. 10ms 10ms 1ms+10ms architecture, That is, the counter is used to produce the standard 1ms, Span style= "FONT-FAMILY:CALIBRI;" >1ms 10ms counter

What is different between%s and%0s? (%s and% 0 s)%s prints the string as it is with spaces at the begining if string contentsis less than string variable size.Whereas%0s supress printing spaces.(If the contents of the string are smaller than the size of the string variable, the%s will be preceded by a space when the string is printed, and%0s will not add spaces (string head print))Here's an example. Hope this helps!Code:Module test (); reg [10*8:0] str = "Hello"; Initial begin $display

Half-integer divider: The counter is triggered by the rising edge, so when the count is N-1, the Count trigger is flipped, the clock's falling edge changes to the rising edge, so the count value is 0, so every time the n+0.5-frequency clock is generated, the trigger clock is flipped once. , using XOR gate and 2-way module design pulse deduction circuit, pulse deduction is the input frequency and 2 output difference or results. ModuleFenpin (clk,rst_n,clk_out);inputCLK;inputRst_n;Outputclk_out;

Tri1SCL; at inout Tri1SDA; - - WireISDA,ISCL,OSDA,OSCL; - - mi2c U_MI2C ( - . CLK (clock), in . NRST (reset), - . A (a), to . Di (DI), + . WR (WR), - . SEL (SEL), the . ISCL (ISCL), * . ISDA (ISDA), $ . Da (DA),Panax Notoginseng . NOE (NOE), - . INTR (INTR), the . OSCL (OSCL), + . OSDA (OSDA) A ); the + AssignISCL =SCL; - AssignISDA =SDA; $ AssignSCL = (OSCL = =1'd0)? 1'D0:1'DZ; $