From 2628932a40d769d8d0180ba6fed1e7b9b2718982 Mon Sep 17 00:00:00 2001 From: jaseg Date: Sun, 3 May 2020 19:53:02 +0200 Subject: minkbd: repo restructure --- .../DSP/Source/FastMathFunctions/arm_cos_f32.c | 115 --------------------- 1 file changed, 115 deletions(-) delete mode 100644 Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_cos_f32.c (limited to 'Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_cos_f32.c') diff --git a/Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_cos_f32.c b/Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_cos_f32.c deleted file mode 100644 index 44efbd5..0000000 --- a/Blink/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_cos_f32.c +++ /dev/null @@ -1,115 +0,0 @@ -/* ---------------------------------------------------------------------- - * Project: CMSIS DSP Library - * Title: arm_cos_f32.c - * Description: Fast cosine calculation for floating-point values - * - * $Date: 27. January 2017 - * $Revision: V.1.5.1 - * - * Target Processor: Cortex-M cores - * -------------------------------------------------------------------- */ -/* - * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved. - * - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the License); you may - * not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an AS IS BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "arm_math.h" -#include "arm_common_tables.h" -/** - * @ingroup groupFastMath - */ - -/** - * @defgroup cos Cosine - * - * Computes the trigonometric cosine function using a combination of table lookup - * and linear interpolation. There are separate functions for - * Q15, Q31, and floating-point data types. - * The input to the floating-point version is in radians and in the range [0 2*pi) while the - * fixed-point Q15 and Q31 have a scaled input with the range - * [0 +0.9999] mapping to [0 2*pi). The fixed-point range is chosen so that a - * value of 2*pi wraps around to 0. - * - * The implementation is based on table lookup using 256 values together with linear interpolation. - * The steps used are: - * -# Calculation of the nearest integer table index - * -# Compute the fractional portion (fract) of the table index. - * -# The final result equals (1.0f-fract)*a + fract*b; - * - * where - * 
- *    b=Table[index+0];
- *    c=Table[index+1];
- *
- */ - - /** - * @addtogroup cos - * @{ - */ - -/** - * @brief Fast approximation to the trigonometric cosine function for floating-point data. - * @param[in] x input value in radians. - * @return cos(x). - */ - -float32_t arm_cos_f32( - float32_t x) -{ - float32_t cosVal, fract, in; /* Temporary variables for input, output */ - uint16_t index; /* Index variable */ - float32_t a, b; /* Two nearest output values */ - int32_t n; - float32_t findex; - - /* input x is in radians */ - /* Scale the input to [0 1] range from [0 2*PI] , divide input by 2*pi, add 0.25 (pi/2) to read sine table */ - in = x * 0.159154943092f + 0.25f; - - /* Calculation of floor value of input */ - n = (int32_t) in; - - /* Make negative values towards -infinity */ - if (in < 0.0f) - { - n--; - } - - /* Map input value to [0 1] */ - in = in - (float32_t) n; - - /* Calculation of index of the table */ - findex = (float32_t) FAST_MATH_TABLE_SIZE * in; - index = ((uint16_t)findex) & 0x1ff; - - /* fractional value calculation */ - fract = findex - (float32_t) index; - - /* Read two nearest values of input value from the cos table */ - a = sinTable_f32[index]; - b = sinTable_f32[index+1]; - - /* Linear interpolation process */ - cosVal = (1.0f-fract)*a + fract*b; - - /* Return the output value */ - return (cosVal); -} - -/** - * @} end of cos group - */ -- cgit