Converting float to string fails?

Question

Hi,

I'm trying to read a value from the main application and display it on UI. I have the following:

var string tempDistance = string(device.CurDistance,0,1) + " mm";

which displays the " mm" part, but the variable is not displayed. It should work(?) as I've tested the following:

if (device.CurDistance > 10.0)
  temp = "DISTANCE ACQUIRED!"
else
  temp = "DISTANCE NOT ACQUIRED!";

which correctly switches between "DISTANCE ACQUIRED" and "DISTANCE NOT ACQUIRED".

Any idea what might be going on? I'm extremely new to embedded wizard, so excuse my confusion...

Br

Answer 1

After investigating the generated code, the bug was caused by EwStringAnsi() called in EwNewStringFloat().

For some reason, the following check was run:

  /* aAnsi string was empty? -> return Null string */
  if ( !str )
    return 0;

Not sure why this happens, but I fixed it with replacing EwNewStringFloat() with EwNewStringInt(). I'm running an old version of EW (8.30), so perhaps this has been fixed in newer versions.

Br