This function and all the rest of functions in
DSP_Func_MFR are fractional function. But you took
this function as a decimal function. You need use
fractional data as inputs. So, the input 1000000 in
decimal is equal to 0.0004656612873077392578125 in
fractional. Its sqrt result is
0.021579186437577744274928111636501 in 16-bit format.
Converts it to decimal, the result is
707.10678118654752440084436208845.
For example, mfr32Sqrt(FRAC32(0.25)) = FRAC16(0.5).
Charlie
--- k...@gmail.com wrote:
> I'm programming an MC56F8347 with DSP_Func_MFR
bean,
> because I need a sqrt function. mfr32Sqrt() always
> seems to provide an answer that is 70.7% of a
> correct answer: for example, if mfr32Sqrt(1000000)
> returns 707 instead of 1000. It does the same thing
> with other input parameters as well. Is this a bug,
> or is there something wrong with me?
>
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