V4.0.1 of the ARM CMSIS DSP libraries. Note that arm_bitreversal2.s, arm_cfft_f32.c and arm_rfft_fast_f32.c had to be removed. arm_bitreversal2.s will not assemble with the online tools. So, the fast f32 FFT functions are not yet available. All the other FFT functions are available.
Dependents: MPU9150_Example fir_f32 fir_f32 MPU9150_nucleo_noni2cdev ... more
FilteringFunctions/arm_fir_sparse_init_q15.c@0:3d9c67d97d6f, 2014-07-28 (annotated)
- Committer:
- emh203
- Date:
- Mon Jul 28 15:03:15 2014 +0000
- Revision:
- 0:3d9c67d97d6f
1st working commit. Had to remove arm_bitreversal2.s arm_cfft_f32.c and arm_rfft_fast_f32.c. The .s will not assemble. For now I removed these functions so we could at least have a library for the other functions.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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emh203 | 0:3d9c67d97d6f | 1 | /* ---------------------------------------------------------------------- |
emh203 | 0:3d9c67d97d6f | 2 | * Copyright (C) 2010-2014 ARM Limited. All rights reserved. |
emh203 | 0:3d9c67d97d6f | 3 | * |
emh203 | 0:3d9c67d97d6f | 4 | * $Date: 12. March 2014 |
emh203 | 0:3d9c67d97d6f | 5 | * $Revision: V1.4.3 |
emh203 | 0:3d9c67d97d6f | 6 | * |
emh203 | 0:3d9c67d97d6f | 7 | * Project: CMSIS DSP Library |
emh203 | 0:3d9c67d97d6f | 8 | * Title: arm_fir_sparse_init_q15.c |
emh203 | 0:3d9c67d97d6f | 9 | * |
emh203 | 0:3d9c67d97d6f | 10 | * Description: Q15 sparse FIR filter initialization function. |
emh203 | 0:3d9c67d97d6f | 11 | * |
emh203 | 0:3d9c67d97d6f | 12 | * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 |
emh203 | 0:3d9c67d97d6f | 13 | * |
emh203 | 0:3d9c67d97d6f | 14 | * Redistribution and use in source and binary forms, with or without |
emh203 | 0:3d9c67d97d6f | 15 | * modification, are permitted provided that the following conditions |
emh203 | 0:3d9c67d97d6f | 16 | * are met: |
emh203 | 0:3d9c67d97d6f | 17 | * - Redistributions of source code must retain the above copyright |
emh203 | 0:3d9c67d97d6f | 18 | * notice, this list of conditions and the following disclaimer. |
emh203 | 0:3d9c67d97d6f | 19 | * - Redistributions in binary form must reproduce the above copyright |
emh203 | 0:3d9c67d97d6f | 20 | * notice, this list of conditions and the following disclaimer in |
emh203 | 0:3d9c67d97d6f | 21 | * the documentation and/or other materials provided with the |
emh203 | 0:3d9c67d97d6f | 22 | * distribution. |
emh203 | 0:3d9c67d97d6f | 23 | * - Neither the name of ARM LIMITED nor the names of its contributors |
emh203 | 0:3d9c67d97d6f | 24 | * may be used to endorse or promote products derived from this |
emh203 | 0:3d9c67d97d6f | 25 | * software without specific prior written permission. |
emh203 | 0:3d9c67d97d6f | 26 | * |
emh203 | 0:3d9c67d97d6f | 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
emh203 | 0:3d9c67d97d6f | 28 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
emh203 | 0:3d9c67d97d6f | 29 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
emh203 | 0:3d9c67d97d6f | 30 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
emh203 | 0:3d9c67d97d6f | 31 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
emh203 | 0:3d9c67d97d6f | 32 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
emh203 | 0:3d9c67d97d6f | 33 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
emh203 | 0:3d9c67d97d6f | 34 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
emh203 | 0:3d9c67d97d6f | 35 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
emh203 | 0:3d9c67d97d6f | 36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
emh203 | 0:3d9c67d97d6f | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
emh203 | 0:3d9c67d97d6f | 38 | * POSSIBILITY OF SUCH DAMAGE. |
emh203 | 0:3d9c67d97d6f | 39 | * ---------------------------------------------------------------------------*/ |
emh203 | 0:3d9c67d97d6f | 40 | |
emh203 | 0:3d9c67d97d6f | 41 | #include "arm_math.h" |
emh203 | 0:3d9c67d97d6f | 42 | |
emh203 | 0:3d9c67d97d6f | 43 | /** |
emh203 | 0:3d9c67d97d6f | 44 | * @ingroup groupFilters |
emh203 | 0:3d9c67d97d6f | 45 | */ |
emh203 | 0:3d9c67d97d6f | 46 | |
emh203 | 0:3d9c67d97d6f | 47 | /** |
emh203 | 0:3d9c67d97d6f | 48 | * @addtogroup FIR_Sparse |
emh203 | 0:3d9c67d97d6f | 49 | * @{ |
emh203 | 0:3d9c67d97d6f | 50 | */ |
emh203 | 0:3d9c67d97d6f | 51 | |
emh203 | 0:3d9c67d97d6f | 52 | /** |
emh203 | 0:3d9c67d97d6f | 53 | * @brief Initialization function for the Q15 sparse FIR filter. |
emh203 | 0:3d9c67d97d6f | 54 | * @param[in,out] *S points to an instance of the Q15 sparse FIR structure. |
emh203 | 0:3d9c67d97d6f | 55 | * @param[in] numTaps number of nonzero coefficients in the filter. |
emh203 | 0:3d9c67d97d6f | 56 | * @param[in] *pCoeffs points to the array of filter coefficients. |
emh203 | 0:3d9c67d97d6f | 57 | * @param[in] *pState points to the state buffer. |
emh203 | 0:3d9c67d97d6f | 58 | * @param[in] *pTapDelay points to the array of offset times. |
emh203 | 0:3d9c67d97d6f | 59 | * @param[in] maxDelay maximum offset time supported. |
emh203 | 0:3d9c67d97d6f | 60 | * @param[in] blockSize number of samples that will be processed per block. |
emh203 | 0:3d9c67d97d6f | 61 | * @return none |
emh203 | 0:3d9c67d97d6f | 62 | * |
emh203 | 0:3d9c67d97d6f | 63 | * <b>Description:</b> |
emh203 | 0:3d9c67d97d6f | 64 | * \par |
emh203 | 0:3d9c67d97d6f | 65 | * <code>pCoeffs</code> holds the filter coefficients and has length <code>numTaps</code>. |
emh203 | 0:3d9c67d97d6f | 66 | * <code>pState</code> holds the filter's state variables and must be of length |
emh203 | 0:3d9c67d97d6f | 67 | * <code>maxDelay + blockSize</code>, where <code>maxDelay</code> |
emh203 | 0:3d9c67d97d6f | 68 | * is the maximum number of delay line values. |
emh203 | 0:3d9c67d97d6f | 69 | * <code>blockSize</code> is the |
emh203 | 0:3d9c67d97d6f | 70 | * number of words processed by <code>arm_fir_sparse_q15()</code> function. |
emh203 | 0:3d9c67d97d6f | 71 | */ |
emh203 | 0:3d9c67d97d6f | 72 | |
emh203 | 0:3d9c67d97d6f | 73 | void arm_fir_sparse_init_q15( |
emh203 | 0:3d9c67d97d6f | 74 | arm_fir_sparse_instance_q15 * S, |
emh203 | 0:3d9c67d97d6f | 75 | uint16_t numTaps, |
emh203 | 0:3d9c67d97d6f | 76 | q15_t * pCoeffs, |
emh203 | 0:3d9c67d97d6f | 77 | q15_t * pState, |
emh203 | 0:3d9c67d97d6f | 78 | int32_t * pTapDelay, |
emh203 | 0:3d9c67d97d6f | 79 | uint16_t maxDelay, |
emh203 | 0:3d9c67d97d6f | 80 | uint32_t blockSize) |
emh203 | 0:3d9c67d97d6f | 81 | { |
emh203 | 0:3d9c67d97d6f | 82 | /* Assign filter taps */ |
emh203 | 0:3d9c67d97d6f | 83 | S->numTaps = numTaps; |
emh203 | 0:3d9c67d97d6f | 84 | |
emh203 | 0:3d9c67d97d6f | 85 | /* Assign coefficient pointer */ |
emh203 | 0:3d9c67d97d6f | 86 | S->pCoeffs = pCoeffs; |
emh203 | 0:3d9c67d97d6f | 87 | |
emh203 | 0:3d9c67d97d6f | 88 | /* Assign TapDelay pointer */ |
emh203 | 0:3d9c67d97d6f | 89 | S->pTapDelay = pTapDelay; |
emh203 | 0:3d9c67d97d6f | 90 | |
emh203 | 0:3d9c67d97d6f | 91 | /* Assign MaxDelay */ |
emh203 | 0:3d9c67d97d6f | 92 | S->maxDelay = maxDelay; |
emh203 | 0:3d9c67d97d6f | 93 | |
emh203 | 0:3d9c67d97d6f | 94 | /* reset the stateIndex to 0 */ |
emh203 | 0:3d9c67d97d6f | 95 | S->stateIndex = 0u; |
emh203 | 0:3d9c67d97d6f | 96 | |
emh203 | 0:3d9c67d97d6f | 97 | /* Clear state buffer and size is always maxDelay + blockSize */ |
emh203 | 0:3d9c67d97d6f | 98 | memset(pState, 0, (maxDelay + blockSize) * sizeof(q15_t)); |
emh203 | 0:3d9c67d97d6f | 99 | |
emh203 | 0:3d9c67d97d6f | 100 | /* Assign state pointer */ |
emh203 | 0:3d9c67d97d6f | 101 | S->pState = pState; |
emh203 | 0:3d9c67d97d6f | 102 | |
emh203 | 0:3d9c67d97d6f | 103 | } |
emh203 | 0:3d9c67d97d6f | 104 | |
emh203 | 0:3d9c67d97d6f | 105 | /** |
emh203 | 0:3d9c67d97d6f | 106 | * @} end of FIR_Sparse group |
emh203 | 0:3d9c67d97d6f | 107 | */ |