Matrix user forums

Hi Team,

Can you please look at my code and see why ground speed in mph will not work.

Thanks
Wayne

Hi Wayne,

I have had a quick look at your program and the reason the code is not working correctly is due to things like this.

mph = ground_speed/0.44704

This would instead have to use the floating point functions.

float = fdiv(ground_speed, 0.044704)

If your ground speed variable in an integer or a byte then you will first have to convert it to a float.

fgnd_sp = int2float(ground_speed)
float = fdiv(fgnd_sp, 0.044704)

The float functions are available from the functions button in the calculation icon.

There is lots of information on the forums regarding these functions.

Hi Benj,

Thanks for the help can you show me a example of how to do this because im lost.

Thanks,
Wayne

Hi Wayne,

This program should now compile and run correctly on the hardware.

Let me know how you get on.

Hi Benj,

Thanks for the help but i get a error when i compile to hex.

wayne

Hello Wayne,

The error is related to this line of C code near the start of your program.

float_detect_tininess = long;

This should instead look like this.

float_detect_tininess = 1; //Detect tininess before divide

or

float_detect_tininess = 0; //Detect tininess after divide

Thanks Benj