case syntax in verilog - Search
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  1. ChipVerify
    https://www.chipverify.com/verilog/verilog-case-statement

    Verilog case statement - ChipVerify

    • Learn how to use the case statement in Verilog to implement multiplexers and check multiple conditions. See the syntax, hardware schematic and simulation log for a 4 to 1 multiplexer with a 2-bit select signal.… See more

    Syntax

    A Verilog case statement starts with the case keyword and ends with the endcase keyword. … See more

    ChipVerify
    Example

    The design module shown below has a 2-bit select signal to route one of the three other 3-bit inputs to the output signal called out. A case statement is used to assign the correct inp… See more

    ChipVerify
    How Is A Case Different from if-else ?

    The case statement is different from if-else-ifin two ways: 1. Expressions given in a if-else block are more general while in a caseblock, a single expression is matched with multipl… See more

    ChipVerify
    Use Verilog to Describe a Combinational Circuit: The “If” an…
    Learn how to use the Verilog case statement to describe a combinational circuit with multiple inputs and outputs. See the syntax, examples, and tips for using the case statement and its varia…
    All About Circuits · https://www.allaboutcircuit…
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    Table of Contents
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    Example
    How Is A Case Different from if-else ?
     

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    Upvotes2Top Answeredited May 23, 2017 at 12:21

    If it is the walking 0's pattern that your after how about:

    localparam SHIFT_W = 3;
    localparam OUT_W = 2**SHIFT_W;
    reg [SHIFT_W-1:0] shift;
    reg [OUT_W-1:0] out;

    always_comb begin
    out = ~(OUT_W'(1'b1 << shift));
    end

    As suggested by nguthrie. Shift to create a walking 1, then invert to create a walking 0.

    My original suggestion (which was a bit verbose) using SystemVerilog to directly create a walking 0:

    localparam SHIFT_W = 3;
    localparam OUT_W = 2**SHIFT_W;
    reg [SHIFT_W-1:0] shift;
    reg [OUT_W-1:0] out;
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  3. FPGA Tutorial
    https://fpgatutorial.com/verilog-if-statement-case-statement

    If Statements and Case Statements in Verilog - FPGA Tutorial

     
  4. VLSI Verify
    https://vlsiverify.com/verilog/case-statement

    case statement in verilog - VLSI Verify

  5. Verilog Pro
    https://www.verilogpro.com/verilog-case-casez-casex

    Verilog twins: case, casez, casex - Verilog Pro

  6. Javatpoint
    https://www.javatpoint.com/verilog-case-statement

    Verilog Case Statement - Javatpoint

  7. Stack Overflow
    https://stackoverflow.com/questions/21401557

    Verilog case statement - Stack Overflow

    verilog - case statement with multiple cases doing same operation ...Dec 6, 2017
    asic - Case statement in verilogMar 14, 2013
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  8. People also ask
    How does a Verilog case statement work?
    A Verilog case statement starts with the case keyword and ends with the endcase keyword. The expression within parantheses will be evaluated exactly once and is compared with the list of alternatives in the order they are written and the statements for which the alternative matches the given expression are executed.

    Verilog case statement - ChipVerify

    chipverify.com
    Can a nested case statement be used in Verilog?
    The nested case statement is allowed. Verilog case statements work similarly as switch statements in C language. An expression inside a case statement can not use <= (relational operator). The === operator is used instead of == operator in case statement comparison. I.e. case statement checks for 0, 1, x and z values in the expression explicitly.

    Case statement in Verilog - VLSI Verify

    vlsiverify.com
    What is a CASEX statement in Verilog?
    In Verilog, there is a casex statement, a variation of the case statement that enables "z", "?", and "x" values to be treated throughout comparison as "don't care" values. "x", "z" and "?" unit of measurement treated as a don't care if they are inside the case expression or if they are inside the case item.

    Verilog Case Statement - Javatpoint

    javatpoint.com
    What is a Casez statement in Verilog?
    In Verilog, there is a casez statement, a variation of the case statement that enables "z" and "?" values to be treated throughout case-comparison as "don't care" values. "Z" and "?" unit of measurement treated as a don't care if they are inside the case expression or if they are inside the case item.

    Verilog Case Statement - Javatpoint

    javatpoint.com
    What is the difference between Casez and CASEX in Verilog?
    The ‘casez’ is more likely used as compared to ‘casex’ as the ‘casez’ does not ignore bit positions having x values and ‘casex’ is not synthesizable as well. The case statement in verilog has a given expression and it is checked with case item expression and the statement or group of statements are executed on matching.

    Case statement in Verilog - VLSI Verify

    vlsiverify.com
    How to use a case statement in SystemVerilog?
    Such as IEEE1364-1995 § 9.5 Case statement and IEEE1800-2012 § 12.5 Case statement. In SystemVerilog, you should use the case (expression) inside statement. (§12.5.4 Set membership case statement). This lets you use the same kind of lists of expressions that the inside operator uses, like a range of values.

    verilog - case statement with multiple cases doing same operation

    stackoverflow.com
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  9. All About Circuits
    https://www.allaboutcircuits.com/techni…

    Use Verilog to Describe a Combinational Circuit: The …

    Jan 31, 2019 · Learn how to use the Verilog case statement to describe a combinational circuit with multiple inputs and outputs. See the syntax, examples, and tips for using the case statement and its variants.

  10. Nandland
    https://nandland.com/case-statement-2

    Case Statement - Nandland

    Learn how to use the Verilog Case Statement to check one input signal against many combinations. See the syntax, the example code, and the simulation wave output.

  11. Circuit Fever
    https://circuitfever.com/case-statement-verilog

    Case Statement in Verilog - Circuit Fever

  12. vlsisource.com
    https://vlsisource.com/verilog/verilog-case-statement

    Verilog Case statement - VLSI SOURCE

  13. Verilog-A/MS
    https://verilogams.com/refman/modules/analog...

    Conditional Statements — Documentation - Verilog-A/MS

  14. Reference Designer
    http://referencedesigner.com/tutorials/verilog/verilog_18.php

    Verilog case statement example - referencedesigner.com

  15. HDL Works
    https://www.hdlworks.com/.../items/CaseStatement.htm

    Case Statement - HDL Works

  16. ChipVerify
    https://www.chipverify.com/verilog/verilog-conditional-statements

    Verilog Conditional Statements - ChipVerify

  17. usu.edu
    https://left.engr.usu.edu/courses/3700/assignments/...

    case statements in Verilog - Utah State University

  18. Stack Overflow
    https://stackoverflow.com/questions/67298095

    Multiple items matching in Verilog case statement

  19. The Octet Institute
    https://www.theoctetinstitute.com/content/verilog/...

    Conditional Statements in Verilog | The Octet Institute

  20. YouTube
    https://www.youtube.com/watch?v=ZL_Pk221ZrE

    Case Statement in Verilog - YouTube

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