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Diffstat (limited to 'DSP_Lib/Source/ControllerFunctions/arm_sin_cos_q31.c')
| -rw-r--r-- | DSP_Lib/Source/ControllerFunctions/arm_sin_cos_q31.c | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/DSP_Lib/Source/ControllerFunctions/arm_sin_cos_q31.c b/DSP_Lib/Source/ControllerFunctions/arm_sin_cos_q31.c deleted file mode 100644 index 5e11b0f..0000000 --- a/DSP_Lib/Source/ControllerFunctions/arm_sin_cos_q31.c +++ /dev/null @@ -1,122 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 19. March 2015 -* $Revision: V.1.4.5 -* -* Project: CMSIS DSP Library -* Title: arm_sin_cos_q31.c -* -* Description: Cosine & Sine calculation for Q31 values. -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#include "arm_math.h" -#include "arm_common_tables.h" - -/** - * @ingroup groupController - */ - - /** - * @addtogroup SinCos - * @{ - */ - -/** - * @brief Q31 sin_cos function. - * @param[in] theta scaled input value in degrees - * @param[out] *pSinVal points to the processed sine output. - * @param[out] *pCosVal points to the processed cosine output. - * @return none. - * - * The Q31 input value is in the range [-1 0.999999] and is mapped to a degree value in the range [-180 179]. - * - */ - -void arm_sin_cos_q31( - q31_t theta, - q31_t * pSinVal, - q31_t * pCosVal) -{ - q31_t fract; /* Temporary variables for input, output */ - uint16_t indexS, indexC; /* Index variable */ - q31_t f1, f2, d1, d2; /* Two nearest output values */ - q31_t Dn, Df; - q63_t temp; - - /* Calculate the nearest index */ - indexS = (uint32_t)theta >> CONTROLLER_Q31_SHIFT; - indexC = (indexS + 128) & 0x1ff; - - /* Calculation of fractional value */ - fract = (theta - (indexS << CONTROLLER_Q31_SHIFT)) << 8; - - /* Read two nearest values of input value from the cos & sin tables */ - f1 = sinTable_q31[indexC+0]; - f2 = sinTable_q31[indexC+1]; - d1 = -sinTable_q31[indexS+0]; - d2 = -sinTable_q31[indexS+1]; - - Dn = 0x1921FB5; // delta between the two points (fixed), in this case 2*pi/FAST_MATH_TABLE_SIZE - Df = f2 - f1; // delta between the values of the functions - temp = Dn*((q63_t)d1 + d2); - temp = temp - ((q63_t)Df << 32); - temp = (q63_t)fract*(temp >> 31); - temp = temp + ((3*(q63_t)Df << 31) - (d2 + ((q63_t)d1 << 1))*Dn); - temp = (q63_t)fract*(temp >> 31); - temp = temp + (q63_t)d1*Dn; - temp = (q63_t)fract*(temp >> 31); - - /* Calculation of cosine value */ - *pCosVal = clip_q63_to_q31((temp >> 31) + (q63_t)f1); - - /* Read two nearest values of input value from the cos & sin tables */ - f1 = sinTable_q31[indexS+0]; - f2 = sinTable_q31[indexS+1]; - d1 = sinTable_q31[indexC+0]; - d2 = sinTable_q31[indexC+1]; - - Df = f2 - f1; // delta between the values of the functions - temp = Dn*((q63_t)d1 + d2); - temp = temp - ((q63_t)Df << 32); - temp = (q63_t)fract*(temp >> 31); - temp = temp + ((3*(q63_t)Df << 31) - (d2 + ((q63_t)d1 << 1))*Dn); - temp = (q63_t)fract*(temp >> 31); - temp = temp + (q63_t)d1*Dn; - temp = (q63_t)fract*(temp >> 31); - - /* Calculation of sine value */ - *pSinVal = clip_q63_to_q31((temp >> 31) + (q63_t)f1); -} - -/** - * @} end of SinCos group - */ |