diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_biquad_cascade_df2T_init_f32.c')
-rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_biquad_cascade_df2T_init_f32.c | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_biquad_cascade_df2T_init_f32.c b/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_biquad_cascade_df2T_init_f32.c deleted file mode 100644 index a84d095d7d..0000000000 --- a/tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/FilteringFunctions/arm_biquad_cascade_df2T_init_f32.c +++ /dev/null @@ -1,102 +0,0 @@ -/*----------------------------------------------------------------------------- -* Copyright (C) 2010-2013 ARM Limited. All rights reserved. -* -* $Date: 17. January 2013 -* $Revision: V1.4.1 -* -* Project: CMSIS DSP Library -* Title: arm_biquad_cascade_df2T_init_f32.c -* -* Description: Initialization function for the floating-point transposed -* direct form II Biquad cascade filter. -* -* 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" - -/** - * @ingroup groupFilters - */ - -/** - * @addtogroup BiquadCascadeDF2T - * @{ - */ - -/** - * @brief Initialization function for the floating-point transposed direct form II Biquad cascade filter. - * @param[in,out] *S points to an instance of the filter data structure. - * @param[in] numStages number of 2nd order stages in the filter. - * @param[in] *pCoeffs points to the filter coefficients. - * @param[in] *pState points to the state buffer. - * @return none - * - * <b>Coefficient and State Ordering:</b> - * \par - * The coefficients are stored in the array <code>pCoeffs</code> in the following order: - * <pre> - * {b10, b11, b12, a11, a12, b20, b21, b22, a21, a22, ...} - * </pre> - * - * \par - * where <code>b1x</code> and <code>a1x</code> are the coefficients for the first stage, - * <code>b2x</code> and <code>a2x</code> are the coefficients for the second stage, - * and so on. The <code>pCoeffs</code> array contains a total of <code>5*numStages</code> values. - * - * \par - * The <code>pState</code> is a pointer to state array. - * Each Biquad stage has 2 state variables <code>d1,</code> and <code>d2</code>. - * The 2 state variables for stage 1 are first, then the 2 state variables for stage 2, and so on. - * The state array has a total length of <code>2*numStages</code> values. - * The state variables are updated after each block of data is processed; the coefficients are untouched. - */ - -void arm_biquad_cascade_df2T_init_f32( - arm_biquad_cascade_df2T_instance_f32 * S, - uint8_t numStages, - float32_t * pCoeffs, - float32_t * pState) -{ - /* Assign filter stages */ - S->numStages = numStages; - - /* Assign coefficient pointer */ - S->pCoeffs = pCoeffs; - - /* Clear state buffer and size is always 2 * numStages */ - memset(pState, 0, (2u * (uint32_t) numStages) * sizeof(float32_t)); - - /* Assign state pointer */ - S->pState = pState; -} - -/** - * @} end of BiquadCascadeDF2T group - */ |