Verilog Programming part 28 potx

... that the particular portion of the code be compiled only if a certain flag is set. This is called conditional compilation. A designer might also want to execute certain parts of the Verilog ... Compilation and Execution A portion of Verilog might be suitable for one environment but not for another. The designer does not wish to create two versions of Verilog design for the two env...

Ngày tải lên: 01/07/2014, 21:20

... primitives are provided in Verilog. buf not The symbols for these logic gates are shown in Figure 5-2 . Figure 5-2. Buf and Not Gates These gates are instantiated in Verilog as shown Example ... Adder This logic diagram for the 1-bit full adder is converted to a Verilog description, shown in Example 5-7 . Example 5-7 Verilog Description for 1-bit Full Adder // Define a 1-bi...

Ngày tải lên: 01/07/2014, 21:20

... allows you to include entire contents of a Verilog source file in another Verilog file during compilation. This works similarly to the #include in the C programming language. This directive is ... Example 3-3 $display Task //Display the string in quotes $display("Hello Verilog World"); Hello Verilog World //Display value of current simulation time 230 $display($...

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... statements in one case statement is not allowed. The case statements can be nested. The following Verilog code implements the type 3 conditional statement in Example 7-18 . //Execute statements

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Ngày tải lên: 01/07/2014, 11:20

... a flat tire. 8. Julie fell off her bicycle and broke hers, her arm. 9. Fruit should be a part of your,yours daily diet. It, They is, are good for you, your. 10. a. Adam and Amanda ... apamnent is on the fifth floor. ' \ ;, c. We live in the same building. Our, Ours apartment has one bedroom, but their, theirs has two. d. Their, There, They're sitting...

Ngày tải lên: 01/07/2014, 14:20

... discussed in the further chapters. • Verilog is similar in syntax to the C programming language . Hardware designers with previous C programming experience will find Verilog easy to learn. • Lexical ... internals of the module in greater detail. A module in Verilog consists of distinct parts, as shown in Figure 4-1 . Figure 4-1. Components of a Verilog Module A module de...

Ngày tải lên: 01/07/2014, 21:20

... connections. However, a warning is typically issued that the widths do not match. Unconnected ports Verilog allows ports to remain unconnected. For example, certain output ports might be simply for ... There are rules governing port connections when modules are instantiated within other modules. The Verilog simulator complains if any port connection rules are violated. These rules ar...

Ngày tải lên: 01/07/2014, 21:20

... such instances, Verilog HDL allows an array of primitive instances to be defined. [1] Example 5-4 shows an example of an array of instances. [1] Refer to the IEEE Standard Verilog Hardware ... Diagram for Multiplexer The logic diagram has a one-to-one correspondence with the Verilog description. The Verilog description for the multiplexer is shown in Example 5-5 . Two interm...

Ngày tải lên: 01/07/2014, 21:20

... Team LiB ] 1.5 Popularity of Verilog HDL Verilog HDL has evolved as a standard hardware description language. Verilog HDL offers many useful features • Verilog HDL is a general-purpose ... easy to use. It is similar in syntax to the C programming language. Designers with C programming experience will find it easy to learn Verilog HDL. • Verilog HDL allows different lev...

Ngày tải lên: 01/07/2014, 21:20