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Embedded Software and Motor Control Libraries for PXR40xx

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4.126.4 Description<br />

This inline function returns converted input value. The input value is considered as single<br />

precision floating point data type <strong>and</strong> output value is considered as 32-bit fractional data<br />

type. The second value represents the scale factor <strong>and</strong> is considered as single precision<br />

floating point data type. The output value represents the values in unity model. The<br />

output saturation is implemented in this function, thus in case the input value is outside<br />

the (-1, 1) interval, the output value is limited to the boundary value.<br />

The output of the function is defined by the following simple equation:<br />

Equation MLIB_Convert_Eq1<br />

Note<br />

Due to effectivity reason this function is implemented as inline<br />

<strong>and</strong> thus is not ANSI-C compliant.<br />

4.126.5 Re-entrancy<br />

The function is re-entrant.<br />

4.126.6 Code Example<br />

#include "mlib.h"<br />

tFloat fltIn1, fltIn2;<br />

tFrac32 f32Out;<br />

void main(void)<br />

{<br />

// input value = 0.25<br />

fltIn1 = 0.25;<br />

// scale value = 0.5<br />

fltIn2 = 0.5;<br />

// output should be FRAC32(0.125) = 0x10000000<br />

f32Out = MLIB_Convert_F32FLT(fltIn1, fltIn2);<br />

// output should be FRAC32(0.125) = 0x10000000<br />

f32Out = MLIB_Convert (fltIn1, fltIn2, F32FLT);<br />

// scale value = 2<br />

<strong>Embedded</strong> <strong>Software</strong> <strong>and</strong> <strong>Motor</strong> <strong>Control</strong> <strong>Libraries</strong> <strong>for</strong> <strong>PXR40xx</strong>, Rev. 1.0<br />

Chapter 4 API References<br />

Freescale Semiconductor, Inc. 569

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