61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/*
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* Copyright (C) 2014-2017 Infineon Technologies AG. All rights reserved.
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*
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* Infineon Technologies AG (Infineon) is supplying this software for use with
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* Infineon's microcontrollers.
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* This file can be freely distributed within development tools that are
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* supporting such microcontrollers.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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* INFINEON SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
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* OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*
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*/
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/**
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* @file
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* @date 07 Aug, 2017
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* @version 1.0.0
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*
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* @brief XMC1300 Boot MATH coprocessor SQRT example
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*
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* The example demonstrates the usage of the CORDIC coprocessor to calculate the square root of a number
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*
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* History <br>
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*
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* Version 1.0.0 Initial <br>
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*
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*/
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#include <xmc_common.h>
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#include "xmc_math.h"
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#include <math.h>
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__STATIC_INLINE float q15_to_float(int16_t a) { return (float)a / 0x8000; }
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__STATIC_INLINE float q31_to_float(int32_t a) { return (float)a / 0x80000000; }
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__STATIC_INLINE int32_t float_to_q15(float a) { return (int16_t)((a * 0x8000) + 0.5); }
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__STATIC_INLINE int32_t float_to_q31(float a) { return (int32_t)((a * 0x80000000) + 0.5); }
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int main(void)
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{
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int32_t a;
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float b, c;
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float error;
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a = XMC_MATH_CORDIC_Q31_Sqrt(float_to_q31(0.1F));
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b = q31_to_float(a);
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c = sqrtf(0.1F);
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error = b - c;
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/* avoid compiler warning */
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(void)error;
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/* Placeholder for user application code. The while loop below can be replaced with user application code. */
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while(1)
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{
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}
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}
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