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Manzo Saita
Joined: 22 Jul 2009
Posts: 5
Location: TKY JPN
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| Function return value can't cast. Help please. |
 Posted: Wed Jul 22, 2009 11:51 pm |
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Hello.
I use PCH3.249.
I wrote the following code.
Variable my_float became 0.
And, variable your_float became 5. ( <--- Result of anticipation)
Is this a problem of CCS-C?
| Code: | unsigned int32 foo( void )
{
return 5;
}
void main( void )
{
unsigned int32 ui32;
float my_float, your_float;
my_float = foo(); // or my_float = (float)foo()
your_float = ui32 = foo();
while(1);
} |
_________________
--- Manzo Saita --- |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Thu Jul 23, 2009 1:20 am |
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| It's apparently a CCS V3.xxx bug. The code is giving correct results in recent V4.095. |
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Manzo Saita
Joined: 22 Jul 2009
Posts: 5
Location: TKY JPN
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| Thank you! |
| Posted: Thu Jul 23, 2009 2:03 am |
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Thank you! I feel much better with that out of the way. 
_________________
--- Manzo Saita --- |
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Ttelmah
Guest
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| Posted: Thu Jul 23, 2009 2:48 am |
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Just tried this on 3.249. Took the code as posted, but added a serial definition, and printed the float values. Compiled for a 16F628, and it happily outputs 5 for both float values.
How are you testing the value?. Looking at the listing, it correctly calls the same conversion function with the same values for both conversions.
I have never heard of a problem here with 3.249.
Best Wishes |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Thu Jul 23, 2009 5:08 am |
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| The bug is present in PCH 3.222 (without using additional printf() statements), it can be seen in assembly listing and MPLAB SIM. I haven't PCH V3.249 installed, but it may the case, that the behaviour is modified when inserting printf(). |
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