FPGA Central

Hi,

What's the right way to get unbuffered I/O using vpi_printf?
I'm using Solaris and Linux and NC-Verilog.

I tried: setbuf(stdout, (char *) 0);
but got a seg fault after a while.

Is setvbuf the way to go?

Thanks,
/Ed

Hi,
Not a VPI solution, but NCSIM has an option -unbuffered to prevent
text IO buffer, will that help you?

Ajeetha,
http://www.noveldv.com
Co-Author: Using PSL/SUGAR for Formal and Dynamic Verification 2nd
Edition.



[email protected] (EdA) wrote in message news:<[email protected]. com>...
> Hi,
>
> What's the right way to get unbuffered I/O using vpi_printf?
> I'm using Solaris and Linux and NC-Verilog.
>
> I tried: setbuf(stdout, (char *) 0);
> but got a seg fault after a while.
>
> Is setvbuf the way to go?
>
> Thanks,
> /Ed

[email protected] (Ajeetha Kumari) wrote in message news:<[email protected]. com>...
> Hi,
> Not a VPI solution, but NCSIM has an option -unbuffered to prevent
> text IO buffer, will that help you?

Hi Ajeetha,

You're right.

% strings `which ncverilog` | grep unbuffer
+ncunbuffered
+ncunbuffered Do not buffer output

Oddly, it doesn't show up with the help (ncverilog -h).

VPI solution wasn't required.

Thanks,
/Ed

PS: Thanks to the others who replied via email.