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Hi all,
I am using the TMS320F280049 series for my application. I have used the sin function by assigning it to a double and provided it parameter also as a double variable. When I pass PI i.e 180 degrees in the sine function, it returns a negative value like -4.37139533e-08. Ideally it should return 0. I have included math.h as well. How do I rectify this issue?
Code:
double number;
double sine_of_number;
number = M_PI;
sine_of_number = sin(number);
Regards,
Pranav
Hmm, strange. I think there's two possibilites:
1) Your doubles are actually floats.
2) You might have the following setting:
When I enable this setting I can (almost) replicate your issue:
So M_PI (3.14159265358979323846) is being modified to single precision (3.1415927410125732) when assigned to number.
Hi,
I don't have the option to select/deselect that setting for treating floating-point constants.
I have used the sin function by assigning it to a double and provided it parameter also as a double variable.
Your sample project does not contain the code in your initial post. Nonetheless I found a use of sin() in ADC_A1_ISR.
As we can see, gf16Sine is a float. Why do you expect this to have double precision?
Furthermore gf16Sine is not in your map file. It looks like your source has been modified after the last successful build.
