> Make sure you used rtl_pthread_attr_setfp when you created the thread.
> Victor Yodaiken
Must the FIFO-handler be a thread ?
I have made it just like you make an ordinary interrupt service routine (normal kernel
function). Is that wrong ?
By the way when i print the same float as hexadecimal number (option %x) in both the
user-space program and in the kernel-space, they are different, but if i cast it to
unsigned int then they seem to be identical.
Can you give a good explanation for that ?
Thanks in advance
Michael
> On Mon, Apr 08, 2002 at 12:41:09PM +0000, Michael Bøllingtoft Nielsen wrote:
> > Hi,
> >
> > I am having problems in sending floats to my realtime program via the
> > RTfifo. The other way around seems to work fine.
> > When i in the fifo-handler tries to compare the float i received from the
> > fifo with the float-constant that i send to the fifo (from user-space) i can
> > see that they are no equal.
> >
> > little code example:
> > (in the fifo-handler)
> > float rec;
> > rtf_get(FIFO_NR,&rec,4)
> > if(rec!=10.81) rtl_printf("not equal");
> >
> > only when the float i am sending is like 10.0, 342.0, 934.0 they are equal,
> > else not.
> >
> > Is there something that i am missing to set (like you have to tell the
> > rt-thread when it is supposed to use the floating point unit) or is it not
> > possible to receive floats in rt-space via RTFIFOs ??
> >
> > thanks in advance
> > Michael
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