Problem with conversion FloatToString

[michaF]

Hi Guys,
I have problem converting a real number to string with the conversion lib.
'FloatToStr(temperatur, temp_text);'
Temperatur is REAL and temp_text is array[23] of char;
In the debugger, the value in the variable before execute FloatToStr is: 2.364854E + 001.
After conversion the value in the variable is: 2.595782E-006.
That can't be right. What am I doing wrong.
Can someone help me.
Greetings micha

[filip]

Hi,

Can you please attach the code snippet that demonstrates this issue ?

Regards,
Filip.

[michaF]

Hi filip,
I have minimized the program so far that the problem can be reproduced.
If the variable temperature and temperature_text are declared global, the problems arise.
You can see that in the debugger (the variables in the watch list).
However, if the variables are declared in the function and not global, the problem does not occur.

Regards,
micha

Code: Select all

program MyProject;
//Test configuration:
//     MCU:             STM32F401RE
//     Dev.Board:       NUCLEO-F401RE

{ Declarations section }
var
 x : byte;
 //
 temperatur : real;
 temperatur_text : array[15] of char;

 //-----------------------------------------------------------
Function werte():byte;
//var
//   temperatur : real;
//   temperatur_text : array[15] of char;
begin
  temperatur :=0;
  temperatur:= 23.64854;
  FloatToStr(temperatur, temperatur_text);
  result := 0;
end;
//=============================================================
begin
  { Main program }
  while true do
  begin
   x := werte();
   //
   Delay_ms(1000);
  end;
end.

[filip]

Hi,

I have tried your code but it was working OK, please see the screenshot below :

test.JPG (172.1 KiB) Viewed 2808 times

Which version of the compiler are you using ?

Regards,
Filip.

[michaF]

Hi filip,
I am using the latest version (6.2).
I think I found the problem:
Optimization level was set to ZERO under the Option -> 'OUTPUT SETTING'.
If I put something else here but 'Zero', everything works under soft simulator or hardware debuger.
Can you check this ?

Regards,
micha

[filip]

Hi,

I apologize for the inconvenience, I have reproduced this issue.

Please find the updated __Lib_Conversions.emcl in the attachment, place it in the \mikroPascal PRO for ARM\Uses\ST M4\ folder instead of the existing one.

This should solve your issue.

Regards,
Filip.

[michaF]

Hi filip,
thanks . I will test it in the next few days.

Another question: is there a description of each optimization level?

Regards
micha

[filip]

Hi,

Not at the moment, but we are planning to add the description in the help file

Regards,
Filip.

[Marniftarr]

Hi all. I have same issue.

I replaced "__Lib_Conversions.emcl" file. The problem is not solved.

I have Mikroe M4 with STM32F415RG controller.

Any solutions ?