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What is the primary purpose of display system tasks in Verilog?
What is the primary purpose of display system tasks in Verilog?
- To check the syntax of the code
- To analyze the circuit behavior
- To optimize the simulation speed
- To display informational and debug messages (correct)
How many categories of display tasks are there in Verilog?
How many categories of display tasks are there in Verilog?
- Five
- Four
- Two
- Three (correct)
What is the difference between the $display and $write tasks?
What is the difference between the $display and $write tasks?
- The $write task does not accept string arguments
- The $write task adds a newline character at the end
- The $display task does not print newline character at the end
- The $display task adds a newline character at the end (correct)
What happens when no argument is specified in a display task?
What happens when no argument is specified in a display task?
What is the purpose of the $strobe task?
What is the purpose of the $strobe task?
What is the syntax to use the $display task?
What is the syntax to use the $display task?
What is the output of the following code: $write("This does not,"); $write("like this.To start new line, use newline char");
What is the output of the following code: $write("This does not,"); $write("like this.To start new line, use newline char");
What is the main difference between the $display and $write tasks in terms of their output?
What is the main difference between the $display and $write tasks in terms of their output?
What is the purpose of the $monitor system task in Verilog?
What is the purpose of the $monitor system task in Verilog?
What is the effect of the line '#10;' in the given Verilog code?
What is the effect of the line '#10;' in the given Verilog code?
What is the difference between $display and $monitor system tasks in Verilog?
What is the difference between $display and $monitor system tasks in Verilog?
What is the initial value of 'a' and 'b' after the lines 'a = 8'h2D;' and 'b = 8'h2D;' are executed?
What is the initial value of 'a' and 'b' after the lines 'a = 8'h2D;' and 'b = 8'h2D;' are executed?
What is the output of the [$strobe] system task at time 10ns?
What is the output of the [$strobe] system task at time 10ns?
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Study Notes
Display Tasks
- Display system tasks are used to display informational and debug messages to track the simulation flow from log files.
- There are three categories of display tasks: Display and Write tasks, Verilog strobe, and Continuous monitoring tasks.
Display and Write Tasks
- $display and $write tasks are similar to the print function in ANSI C language.
- The main difference between $display and $write is that $display adds a new line character at the end of the output, while $write does not.
- Syntax: $display() and $write().
- Both tasks display arguments in the order they appear in the argument list.
- If no argument is specified, it is declared a null argument, and a single space character is printed when the task is invoked.
Verilog Strobes
- $strobe prints the final values of variables at the end of the current delta time-step.
- Format is similar to $display.
- A newline is automatically added to the text.
- Example: $strobe is used to print the values of variables at specific times in the simulation.
Verilog Continuous Monitors
- $monitor helps to automatically print out variable or expression values whenever the variable or expression in its argument list changes.
- Achieves a similar effect of calling $display after every time any of its arguments get updated.
- A newline is automatically added to the text.
- Example: $monitor is used to continuously monitor and print the values of variables throughout the simulation.
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