scanf() acting strange

["Tim Drury" <tim.drury@gtri.gatech.edu>]

I think this came up a couple weeks ago and I thought
I saved the message(s) but I couldn't find them.

My platform is a mc68333 board and I'm using a Linux
to m68k cross-compiler.  I have printf() working great,
but when I call scanf() it doesn't seem to get the
end-of-line character correctly.

For example, I have a loop which asks for a string, an
integer, and a float.  It looks something like this:

char s[100]
int i;
float f;

while(1)
{
   printf("enter a string:\n");
   scanf("%s", s);
   printf("you said %s.\n", s);

   printf("enter an integer:\n");
   scanf("%d", &i);
   printf("you said %d.\n", i);

   printf("enter a float:\n");
   scanf("%f", &f);
   printf("you said %f.\n", f);
}

And when I run it, the program waits for me to enter a string.
But when I hit the "enter" key nothing happens.  If I hit it
again, the program continues, but doesn't ask for any more input -
it just keeps printing the following:

enter a string:
you said asdfs.
enter an integer:
you said: 0.
enter a float:
you said 0.0.
...

The string is correct, but the integer and float are never
prompted for.  If I peek into my serial input buffer I see:

asdfs\r\r\0\0......\0

It is a 256 byte buffer.  This looks correct - my string is
there terminated with \r and my second \r is in there too.
Why doesn't my program stop and ask for the integer and
the float?

I haven't touched read.c, but I re-wrote inbyte() to read
characters from my serial input buffer.

Any ideas?

-tim