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floating to fixed of trignometric functions

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Sunanda :)

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Hello everyone,
I am in the process of converting a navigation algorithm from floating to fixed. I am a newbie in this, as in i m converting a floating point code into fixed point for the first time. Could any one help me out in writing a fixed point routine for fixed point TRIGNOMETRIC FUNCTIONS ?
Thanking you
Sunanda
 

For example suppose you already have values to 6 or more decimal places, and you want values rounded to 5 decimal places...

Starting with a floating point value (x), use a sequence like this.

y = x * (10 ^5)

y = INT ( y + .49 )

y= y / ( 10 ^ 5 )

The result is your initial value rounded to 5 decimal places.
 

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