These commands have the same syntax, and display text on the
screen during simulation. They are much less convenient than waveform display
tools like cwaves?.
$display and $strobe display once every time they are
executed, whereas $monitor displays every time one of its parameters changes.
The difference between $display and $strobe is that $strobe
displays the parameters at the very end of the current simulation time unit
rather than exactly where it is executed.
The format string is like that in
C/C++, and may contain format characters.
Format characters include %d
(decimal), %h (hexadecimal), %b (binary), %c (character), %s (string) and %t
(time), %m (hierarchy level). %5d, %5b etc. would give exactly 5 spaces for the
number instead of the space needed.
Append b, h, o to the task name to change
default format to binary, octal or hexadecimal.
Syntax:
$display (“format_string”, par_1, par_2, ... );
$strobe (“format_string”, par_1, par_2, ... );
$monitor (“format_string”, par_1, par_2, ... );
