Convert signed fixed point to float

Question

I have got number in this mode: Value mode = 16-bit fixed point (signed)

And how I can convert this number to floating point? Any idea?

Can I use this function, when this number is signed?

float toFloat(int16_t val) {
        return ((float)val)/256.0f;
    }

What do you mean with "fixed point"? Is it of the form 123.45? Or is it just an integer? — Paul Ogilvie, Apr 13 '16 at 11:59
It is data from gyroscope: [---LINK---](http://www.lp-research.com/site/wp-content/uploads/2012/05/LpmsAllUsersGuide1.3.4.pdf), page 45. And it is fixed point in form: `123.45` or `-123.45` — Jirka, Apr 13 '16 at 12:06
The linked data sheet shows factors of 100 or 1000, not 256. It's true that 0x100 would be 256 but there is no suggestion that it is hexadecimal. — Weather Vane, Apr 13 '16 at 12:11

score 1 · Answer 1 · answered Apr 13 '16 at 12:26

1

Ok. I wrong understood. So the gyroscope data return in int16 x 1000. When I used function:

float toFloat(int16_t val) {
    return ((float)val)/1000.0f;
}

Now is receiving data good.

answered Apr 13 '16 at 12:26

Jirka

1 Answers1