RE: [rtl] rtl_printf an floating point

["Dresner, Norman A." <norman_a_dresner@md.northgrum.com>]

I believe you can't.  Even though you can specify that a real-time
module/task/thread can use the math coprocessor (I'm assuming your in an x86
architecture), the kernel versions of printf don't support floating point
conversions.

I think that the best you can do is to send the data to a user-task via a
real-time FIFO (or dump the data into shared memory) for printing.

Norman Dresner
Fellow Systems Engineer
Radar Systems Engineering Department
Electronic Systems and Sensors Segment
Northrop Grumman Corporation
Baltimore-Washington International Airport
7323 Aviation Boulevard
Baltimore Maryland 21240

Voice:	(410) 993 - 2096	Mornings; all-day voice-mail
	(410) 969 - 8068	Afternoons with answering machine
FAX:	(410) 993 - 8084	On-site
	(410) 969 - 8068	Afternoons; call first to arrange
E-Mail: Mornings:	Norman_A_Dresner@mail.Northgrum.com
	Afternoons:	ndrez@att.net

> -----Original Message-----
> From:	joseph canou [SMTP:Joseph.Canou@bourges.univ-orleans.fr]
> Sent:	Wednesday, March 07, 2001 7:54 AM
> To:	rtl@rtlinux.org
> Subject:	[rtl] rtl_printf an floating point
> 
> hello
> i am using floating point in rt module and i would like to see some
> results (for debugging) by using rtl_printf
> but if i write  rtl_printf("%f", var) with var declared as double i just
> see   %f   in /var/log/messages
> how can i do to see this var value?
> i use rtl3.0 pre9
> thank you for your help
> 
> -- [rtl] ---
> To unsubscribe:
> echo "unsubscribe rtl" | mail majordomo@rtlinux.org OR
> echo "unsubscribe rtl <Your_email>" | mail majordomo@rtlinux.org
> --
> For more information on Real-Time Linux see:
> http://www.rtlinux.org/rtlinux/