![]() Below is a brief overview of strength mnemonics and their corresponding strength levels: The strength levels are either represented by a mnemonic or a pair of decimal digits, indicating a range of strength levels. In this module, %v reveals the strength of weakPullUpWire. $display("Strength: %v", weakPullUpWire) Here's an illustration of how it works: module SignalStrengthModule It presents the strength of scalar nets in a three-character format: the first two characters represent the strength, while the third signifies the scalar's logic value. To determine this, we use the %v format specifier. Signal strength in SystemVerilog is crucial for evaluating a net's driving capability. %v - Unveiling Net Signal Strength in SystemVerilog These specifiers are a debugging boon, aiding in more efficient issue identification and resolution. The brilliance of both %l and %m is that they don't require arguments-they directly refer to the library and hierarchical name details of the current instance, respectively. Let's witness both specifiers in action within a single module: module SystemVerilogModule This is particularly handy when dealing with multiple instances of a module and needing to trace a specific system task's source. Similarly, the %m specifier displays the hierarchical name of the invoking design element, whether it's a subroutine, a named block, or any other labeled statement. The %l specifier outputs the library details of a module instance in a "library.cell" format, illuminating the origin library and the cell name of the current instance. In SystemVerilog, %l and %m formatting specifiers perform unique roles. %l, %m - Deciphering Library Binding and Hierarchical Names in SystemVerilog Here, %e displays in exponential format, %f in decimal format, and %g selects the shorter of the two. This feature proves incredibly useful when handling large floating-point numbers or precision decimal numbers: module RealNumbersModule Real numbers in SystemVerilog can be displayed in exponential, decimal, or a shorter version of both. %e, %f, %g - Mastering the Art of Displaying Real Numbers The %c format specifier displays the ASCII character equivalent of a byte, and %s is used to display strings. $display("ASCII character: %c", asciiVal) Verilog and SystemVerilog allow us to interpret ASCII codes as characters and to display strings-convenient for printing messages or data in human-readable format: module StringModule īyte asciiVal = 8'h41 // ASCII code for 'A' %c, %s - Decoding ASCII Character and String Formats Notably, we've utilized %4d and %3h or %3x to control the output width-a potent feature when handling varied-sized data, enhancing your output's clarity and readability. The output would present the twelveBitReg value in each of the specified formats. ![]() $display("Binary Format: %b", twelveBitReg) ![]() $display("Same Hexadecimal Format: %3x", twelveBitReg) // %x acts the same as %h $display("Hexadecimal Format: %3h", twelveBitReg) // three characters for hexadecimal $display("Octal Format: %o", twelveBitReg) $display("Decimal Format: %4d", twelveBitReg) TwelveBitReg = 12'd1023 // decimal format Specific format specifiers, like %d for decimal, %o for octal, %h or %x for hexadecimal, and %b for binary, help shape your data's appearance.Ĭonsider an example where we display a 12-bit register value in these various formats: module TestModule In Verilog and SystemVerilog programming, you'll frequently utilize the $display function to present data in your preferred format. Let's embark on this informative journey! %d, %o, %h, %x, %b - Exploring Decimal, Octal, Hexadecimal, and Binary Formats In this comprehensive guide, we'll explore these specifications to help you decipher the code and output in Verilog and SystemVerilog. Display in decimal, octal, hexadecimal (either %h or %x), binary formatĭisplay library binding information, hierarchical names ![]()
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