Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

[ModelSim] How to see local variables in VHDL procedures in waveforms?

Hi All, How can I see the variables, which were locally defined in the VHDL procedures, in the waveform? Somehow I cannot see nor the procedures themselves nor their variables. Should I a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Using textio, there is a default file called OUTPUT that allows you to write to the simulator console.

you can do it one of two ways.

1. Like normal textio, write to a line then write the line to the console: 


variable l : line;
write(l, string'("This is some debug text"));
writeline(OUTPUT, l);

or write drictly to output. Heres a nice little wrapper procedure for you. 


procedure echo (arg : in string := "") is
begin
    std.textio.write(std.textio.output, arg);
end procedure echo;
--echos to console with a newline at the end
procedure echol(arg          : in string := "") is
begin
    std.textio.write(std.textio.output, arg & LF);
end procedure echol;