init
This commit is contained in:
@@ -0,0 +1,4 @@
|
||||
CMSIS DSP_Lib example arm_fir_example for
|
||||
Cortex-M0, Cortex-M3, Cortex-M4 with FPU and Cortex-M7 with single precision FPU.
|
||||
|
||||
The example is configured for uVision Simulator.
|
||||
@@ -0,0 +1,134 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Copyright (C) 2010-2012 ARM Limited. All rights reserved.
|
||||
*
|
||||
* $Date: 17. January 2013
|
||||
* $Revision: V1.4.0
|
||||
*
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_fir_data.c
|
||||
*
|
||||
* Description: Data file used for example code
|
||||
*
|
||||
* 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"
|
||||
|
||||
/* ----------------------------------------------------------------------
|
||||
** Test input signal contains 1000Hz + 15000 Hz
|
||||
** ------------------------------------------------------------------- */
|
||||
|
||||
float32_t testInput_f32_1kHz_15kHz[320] =
|
||||
{
|
||||
+0.0000000000f, +0.5924659585f, -0.0947343455f, +0.1913417162f, +1.0000000000f, +0.4174197128f, +0.3535533906f, +1.2552931065f,
|
||||
+0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
|
||||
+0.8660254038f, +1.2552931065f, +0.3535533906f, +0.4174197128f, +1.0000000000f, +0.1913417162f, -0.0947343455f, +0.5924659585f,
|
||||
-0.0000000000f, -0.5924659585f, +0.0947343455f, -0.1913417162f, -1.0000000000f, -0.4174197128f, -0.3535533906f, -1.2552931065f,
|
||||
-0.8660254038f, -0.4619397663f, -1.3194792169f, -1.1827865776f, -0.5000000000f, -1.1827865776f, -1.3194792169f, -0.4619397663f,
|
||||
-0.8660254038f, -1.2552931065f, -0.3535533906f, -0.4174197128f, -1.0000000000f, -0.1913417162f, +0.0947343455f, -0.5924659585f,
|
||||
+0.0000000000f, +0.5924659585f, -0.0947343455f, +0.1913417162f, +1.0000000000f, +0.4174197128f, +0.3535533906f, +1.2552931065f,
|
||||
+0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
|
||||
+0.8660254038f, +1.2552931065f, +0.3535533906f, +0.4174197128f, +1.0000000000f, +0.1913417162f, -0.0947343455f, +0.5924659585f,
|
||||
+0.0000000000f, -0.5924659585f, +0.0947343455f, -0.1913417162f, -1.0000000000f, -0.4174197128f, -0.3535533906f, -1.2552931065f,
|
||||
-0.8660254038f, -0.4619397663f, -1.3194792169f, -1.1827865776f, -0.5000000000f, -1.1827865776f, -1.3194792169f, -0.4619397663f,
|
||||
-0.8660254038f, -1.2552931065f, -0.3535533906f, -0.4174197128f, -1.0000000000f, -0.1913417162f, +0.0947343455f, -0.5924659585f,
|
||||
+0.0000000000f, +0.5924659585f, -0.0947343455f, +0.1913417162f, +1.0000000000f, +0.4174197128f, +0.3535533906f, +1.2552931065f,
|
||||
+0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
|
||||
+0.8660254038f, +1.2552931065f, +0.3535533906f, +0.4174197128f, +1.0000000000f, +0.1913417162f, -0.0947343455f, +0.5924659585f,
|
||||
+0.0000000000f, -0.5924659585f, +0.0947343455f, -0.1913417162f, -1.0000000000f, -0.4174197128f, -0.3535533906f, -1.2552931065f,
|
||||
-0.8660254038f, -0.4619397663f, -1.3194792169f, -1.1827865776f, -0.5000000000f, -1.1827865776f, -1.3194792169f, -0.4619397663f,
|
||||
-0.8660254038f, -1.2552931065f, -0.3535533906f, -0.4174197128f, -1.0000000000f, -0.1913417162f, +0.0947343455f, -0.5924659585f,
|
||||
-0.0000000000f, +0.5924659585f, -0.0947343455f, +0.1913417162f, +1.0000000000f, +0.4174197128f, +0.3535533906f, +1.2552931065f,
|
||||
+0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
|
||||
+0.8660254038f, +1.2552931065f, +0.3535533906f, +0.4174197128f, +1.0000000000f, +0.1913417162f, -0.0947343455f, +0.5924659585f,
|
||||
-0.0000000000f, -0.5924659585f, +0.0947343455f, -0.1913417162f, -1.0000000000f, -0.4174197128f, -0.3535533906f, -1.2552931065f,
|
||||
-0.8660254038f, -0.4619397663f, -1.3194792169f, -1.1827865776f, -0.5000000000f, -1.1827865776f, -1.3194792169f, -0.4619397663f,
|
||||
-0.8660254038f, -1.2552931065f, -0.3535533906f, -0.4174197128f, -1.0000000000f, -0.1913417162f, +0.0947343455f, -0.5924659585f,
|
||||
+0.0000000000f, +0.5924659585f, -0.0947343455f, +0.1913417162f, +1.0000000000f, +0.4174197128f, +0.3535533906f, +1.2552931065f,
|
||||
+0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
|
||||
+0.8660254038f, +1.2552931065f, +0.3535533906f, +0.4174197128f, +1.0000000000f, +0.1913417162f, -0.0947343455f, +0.5924659585f,
|
||||
+0.0000000000f, -0.5924659585f, +0.0947343455f, -0.1913417162f, -1.0000000000f, -0.4174197128f, -0.3535533906f, -1.2552931065f,
|
||||
-0.8660254038f, -0.4619397663f, -1.3194792169f, -1.1827865776f, -0.5000000000f, -1.1827865776f, -1.3194792169f, -0.4619397663f,
|
||||
-0.8660254038f, -1.2552931065f, -0.3535533906f, -0.4174197128f, -1.0000000000f, -0.1913417162f, +0.0947343455f, -0.5924659585f,
|
||||
-0.0000000000f, +0.5924659585f, -0.0947343455f, +0.1913417162f, +1.0000000000f, +0.4174197128f, +0.3535533906f, +1.2552931065f,
|
||||
+0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
|
||||
+0.8660254038f, +1.2552931065f, +0.3535533906f, +0.4174197128f, +1.0000000000f, +0.1913417162f, -0.0947343455f, +0.5924659585f,
|
||||
+0.0000000000f, -0.5924659585f, +0.0947343455f, -0.1913417162f, -1.0000000000f, -0.4174197128f, -0.3535533906f, -1.2552931065f,
|
||||
-0.8660254038f, -0.4619397663f, -1.3194792169f, -1.1827865776f, -0.5000000000f, -1.1827865776f, -1.3194792169f, -0.4619397663f,
|
||||
-0.8660254038f, -1.2552931065f, -0.3535533906f, -0.4174197128f, -1.0000000000f, -0.1913417162f, +0.0947343455f, -0.5924659585f,
|
||||
-0.0000000000f, +0.5924659585f, -0.0947343455f, +0.1913417162f, +1.0000000000f, +0.4174197128f, +0.3535533906f, +1.2552931065f,
|
||||
+0.8660254038f, +0.4619397663f, +1.3194792169f, +1.1827865776f, +0.5000000000f, +1.1827865776f, +1.3194792169f, +0.4619397663f,
|
||||
+0.8660254038f, +1.2552931065f, +0.3535533906f, +0.4174197128f, +1.0000000000f, +0.1913417162f, -0.0947343455f, +0.5924659585f,
|
||||
+0.0000000000f, -0.5924659585f, +0.0947343455f, -0.1913417162f, -1.0000000000f, -0.4174197128f, -0.3535533906f, -1.2552931065f,
|
||||
};
|
||||
|
||||
float32_t refOutput[320] =
|
||||
{
|
||||
+0.0000000000f, -0.0010797829f, -0.0007681386f, -0.0001982932f, +0.0000644313f, +0.0020854271f, +0.0036891871f, +0.0015855941f,
|
||||
-0.0026280805f, -0.0075907658f, -0.0119390538f, -0.0086665968f, +0.0088981202f, +0.0430539279f, +0.0974468742f, +0.1740405600f,
|
||||
+0.2681416601f, +0.3747720089f, +0.4893362230f, +0.6024154672f, +0.7058740791f, +0.7968348987f, +0.8715901940f, +0.9277881093f,
|
||||
+0.9682182661f, +0.9934674267f, +1.0012052245f, +0.9925859371f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
|
||||
+0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, -0.0000000000f, -0.1309866321f,
|
||||
-0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
|
||||
-0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
|
||||
-0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, +0.0000000000f, +0.1309866321f,
|
||||
+0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
|
||||
+0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
|
||||
+0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, -0.0000000000f, -0.1309866321f,
|
||||
-0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
|
||||
-0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
|
||||
-0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, +0.0000000000f, +0.1309866321f,
|
||||
+0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
|
||||
+0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
|
||||
+0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, -0.0000000000f, -0.1309866321f,
|
||||
-0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
|
||||
-0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
|
||||
-0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, +0.0000000000f, +0.1309866321f,
|
||||
+0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
|
||||
+0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
|
||||
+0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, +0.0000000000f, -0.1309866321f,
|
||||
-0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
|
||||
-0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
|
||||
-0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, +0.0000000000f, +0.1309866321f,
|
||||
+0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
|
||||
+0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
|
||||
+0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, +0.0000000000f, -0.1309866321f,
|
||||
-0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
|
||||
-0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
|
||||
-0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, -0.0000000000f, +0.1309866321f,
|
||||
+0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
|
||||
+0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f,
|
||||
+0.7085021596f, +0.6100062330f, +0.5012752767f, +0.3834386057f, +0.2592435399f, +0.1309866321f, +0.0000000000f, -0.1309866321f,
|
||||
-0.2592435399f, -0.3834386057f, -0.5012752767f, -0.6100062330f, -0.7085021596f, -0.7952493046f, -0.8679010068f, -0.9257026822f,
|
||||
-0.9681538347f, -0.9936657199f, -1.0019733630f, -0.9936657199f, -0.9681538347f, -0.9257026822f, -0.8679010068f, -0.7952493046f,
|
||||
-0.7085021596f, -0.6100062330f, -0.5012752767f, -0.3834386057f, -0.2592435399f, -0.1309866321f, +0.0000000000f, +0.1309866321f,
|
||||
+0.2592435399f, +0.3834386057f, +0.5012752767f, +0.6100062330f, +0.7085021596f, +0.7952493046f, +0.8679010068f, +0.9257026822f,
|
||||
+0.9681538347f, +0.9936657199f, +1.0019733630f, +0.9936657199f, +0.9681538347f, +0.9257026822f, +0.8679010068f, +0.7952493046f
|
||||
};
|
||||
|
||||
@@ -0,0 +1,233 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Copyright (C) 2010-2012 ARM Limited. All rights reserved.
|
||||
*
|
||||
* $Date: 17. January 2013
|
||||
* $Revision: V1.4.0
|
||||
*
|
||||
* Project: CMSIS DSP Library
|
||||
* Title: arm_fir_example_f32.c
|
||||
*
|
||||
* Description: Example code demonstrating how an FIR filter can be used
|
||||
* as a low pass filter.
|
||||
*
|
||||
* Target Processor: Cortex-M4/Cortex-M3
|
||||
*
|
||||
* 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.
|
||||
* -------------------------------------------------------------------- */
|
||||
|
||||
/**
|
||||
* @ingroup groupExamples
|
||||
*/
|
||||
|
||||
/**
|
||||
* @defgroup FIRLPF FIR Lowpass Filter Example
|
||||
*
|
||||
* \par Description:
|
||||
* \par
|
||||
* Removes high frequency signal components from the input using an FIR lowpass filter.
|
||||
* The example demonstrates how to configure an FIR filter and then pass data through
|
||||
* it in a block-by-block fashion.
|
||||
* \image html FIRLPF_signalflow.gif
|
||||
*
|
||||
* \par Algorithm:
|
||||
* \par
|
||||
* The input signal is a sum of two sine waves: 1 kHz and 15 kHz.
|
||||
* This is processed by an FIR lowpass filter with cutoff frequency 6 kHz.
|
||||
* The lowpass filter eliminates the 15 kHz signal leaving only the 1 kHz sine wave at the output.
|
||||
* \par
|
||||
* The lowpass filter was designed using MATLAB with a sample rate of 48 kHz and
|
||||
* a length of 29 points.
|
||||
* The MATLAB code to generate the filter coefficients is shown below:
|
||||
* <pre>
|
||||
* h = fir1(28, 6/24);
|
||||
* </pre>
|
||||
* The first argument is the "order" of the filter and is always one less than the desired length.
|
||||
* The second argument is the normalized cutoff frequency. This is in the range 0 (DC) to 1.0 (Nyquist).
|
||||
* A 6 kHz cutoff with a Nyquist frequency of 24 kHz lies at a normalized frequency of 6/24 = 0.25.
|
||||
* The CMSIS FIR filter function requires the coefficients to be in time reversed order.
|
||||
* <pre>
|
||||
* fliplr(h)
|
||||
* </pre>
|
||||
* The resulting filter coefficients and are shown below.
|
||||
* Note that the filter is symmetric (a property of linear phase FIR filters)
|
||||
* and the point of symmetry is sample 14. Thus the filter will have a delay of
|
||||
* 14 samples for all frequencies.
|
||||
* \par
|
||||
* \image html FIRLPF_coeffs.gif
|
||||
* \par
|
||||
* The frequency response of the filter is shown next.
|
||||
* The passband gain of the filter is 1.0 and it reaches 0.5 at the cutoff frequency 6 kHz.
|
||||
* \par
|
||||
* \image html FIRLPF_response.gif
|
||||
* \par
|
||||
* The input signal is shown below.
|
||||
* The left hand side shows the signal in the time domain while the right hand side is a frequency domain representation.
|
||||
* The two sine wave components can be clearly seen.
|
||||
* \par
|
||||
* \image html FIRLPF_input.gif
|
||||
* \par
|
||||
* The output of the filter is shown below. The 15 kHz component has been eliminated.
|
||||
* \par
|
||||
* \image html FIRLPF_output.gif
|
||||
*
|
||||
* \par Variables Description:
|
||||
* \par
|
||||
* \li \c testInput_f32_1kHz_15kHz points to the input data
|
||||
* \li \c refOutput points to the reference output data
|
||||
* \li \c testOutput points to the test output data
|
||||
* \li \c firStateF32 points to state buffer
|
||||
* \li \c firCoeffs32 points to coefficient buffer
|
||||
* \li \c blockSize number of samples processed at a time
|
||||
* \li \c numBlocks number of frames
|
||||
*
|
||||
* \par CMSIS DSP Software Library Functions Used:
|
||||
* \par
|
||||
* - arm_fir_init_f32()
|
||||
* - arm_fir_f32()
|
||||
*
|
||||
* <b> Refer </b>
|
||||
* \link arm_fir_example_f32.c \endlink
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
/** \example arm_fir_example_f32.c
|
||||
*/
|
||||
|
||||
/* ----------------------------------------------------------------------
|
||||
** Include Files
|
||||
** ------------------------------------------------------------------- */
|
||||
|
||||
#include "arm_math.h"
|
||||
#include "math_helper.h"
|
||||
|
||||
/* ----------------------------------------------------------------------
|
||||
** Macro Defines
|
||||
** ------------------------------------------------------------------- */
|
||||
|
||||
#define TEST_LENGTH_SAMPLES 320
|
||||
#define SNR_THRESHOLD_F32 140.0f
|
||||
#define BLOCK_SIZE 32
|
||||
#define NUM_TAPS 29
|
||||
|
||||
/* -------------------------------------------------------------------
|
||||
* The input signal and reference output (computed with MATLAB)
|
||||
* are defined externally in arm_fir_lpf_data.c.
|
||||
* ------------------------------------------------------------------- */
|
||||
|
||||
extern float32_t testInput_f32_1kHz_15kHz[TEST_LENGTH_SAMPLES];
|
||||
extern float32_t refOutput[TEST_LENGTH_SAMPLES];
|
||||
|
||||
/* -------------------------------------------------------------------
|
||||
* Declare Test output buffer
|
||||
* ------------------------------------------------------------------- */
|
||||
|
||||
static float32_t testOutput[TEST_LENGTH_SAMPLES];
|
||||
|
||||
/* -------------------------------------------------------------------
|
||||
* Declare State buffer of size (numTaps + blockSize - 1)
|
||||
* ------------------------------------------------------------------- */
|
||||
|
||||
static float32_t firStateF32[BLOCK_SIZE + NUM_TAPS - 1];
|
||||
|
||||
/* ----------------------------------------------------------------------
|
||||
** FIR Coefficients buffer generated using fir1() MATLAB function.
|
||||
** fir1(28, 6/24)
|
||||
** ------------------------------------------------------------------- */
|
||||
|
||||
const float32_t firCoeffs32[NUM_TAPS] = {
|
||||
-0.0018225230f, -0.0015879294f, +0.0000000000f, +0.0036977508f, +0.0080754303f, +0.0085302217f, -0.0000000000f, -0.0173976984f,
|
||||
-0.0341458607f, -0.0333591565f, +0.0000000000f, +0.0676308395f, +0.1522061835f, +0.2229246956f, +0.2504960933f, +0.2229246956f,
|
||||
+0.1522061835f, +0.0676308395f, +0.0000000000f, -0.0333591565f, -0.0341458607f, -0.0173976984f, -0.0000000000f, +0.0085302217f,
|
||||
+0.0080754303f, +0.0036977508f, +0.0000000000f, -0.0015879294f, -0.0018225230f
|
||||
};
|
||||
|
||||
/* ------------------------------------------------------------------
|
||||
* Global variables for FIR LPF Example
|
||||
* ------------------------------------------------------------------- */
|
||||
|
||||
uint32_t blockSize = BLOCK_SIZE;
|
||||
uint32_t numBlocks = TEST_LENGTH_SAMPLES/BLOCK_SIZE;
|
||||
|
||||
float32_t snr;
|
||||
|
||||
/* ----------------------------------------------------------------------
|
||||
* FIR LPF Example
|
||||
* ------------------------------------------------------------------- */
|
||||
|
||||
int32_t main(void)
|
||||
{
|
||||
uint32_t i;
|
||||
arm_fir_instance_f32 S;
|
||||
arm_status status;
|
||||
float32_t *inputF32, *outputF32;
|
||||
|
||||
/* Initialize input and output buffer pointers */
|
||||
inputF32 = &testInput_f32_1kHz_15kHz[0];
|
||||
outputF32 = &testOutput[0];
|
||||
|
||||
/* Call FIR init function to initialize the instance structure. */
|
||||
arm_fir_init_f32(&S, NUM_TAPS, (float32_t *)&firCoeffs32[0], &firStateF32[0], blockSize);
|
||||
|
||||
/* ----------------------------------------------------------------------
|
||||
** Call the FIR process function for every blockSize samples
|
||||
** ------------------------------------------------------------------- */
|
||||
|
||||
for(i=0; i < numBlocks; i++)
|
||||
{
|
||||
arm_fir_f32(&S, inputF32 + (i * blockSize), outputF32 + (i * blockSize), blockSize);
|
||||
}
|
||||
|
||||
/* ----------------------------------------------------------------------
|
||||
** Compare the generated output against the reference output computed
|
||||
** in MATLAB.
|
||||
** ------------------------------------------------------------------- */
|
||||
|
||||
snr = arm_snr_f32(&refOutput[0], &testOutput[0], TEST_LENGTH_SAMPLES);
|
||||
|
||||
if (snr < SNR_THRESHOLD_F32)
|
||||
{
|
||||
status = ARM_MATH_TEST_FAILURE;
|
||||
}
|
||||
else
|
||||
{
|
||||
status = ARM_MATH_SUCCESS;
|
||||
}
|
||||
|
||||
/* ----------------------------------------------------------------------
|
||||
** Loop here if the signal does not match the reference output.
|
||||
** ------------------------------------------------------------------- */
|
||||
|
||||
if ( status != ARM_MATH_SUCCESS)
|
||||
{
|
||||
while (1);
|
||||
}
|
||||
|
||||
while (1); /* main function does not return */
|
||||
}
|
||||
|
||||
/** \endlink */
|
||||
@@ -0,0 +1,466 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Copyright (C) 2010-2012 ARM Limited. All rights reserved.
|
||||
*
|
||||
* $Date: 17. January 2013
|
||||
* $Revision: V1.4.0 b
|
||||
*
|
||||
* Project: CMSIS DSP Library
|
||||
*
|
||||
* Title: math_helper.c
|
||||
*
|
||||
* Description: Definition of all helper functions required.
|
||||
*
|
||||
* Target Processor: Cortex-M4/Cortex-M3
|
||||
*
|
||||
* 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 standard header files
|
||||
* -------------------------------------------------------------------- */
|
||||
#include<math.h>
|
||||
|
||||
/* ----------------------------------------------------------------------
|
||||
* Include project header files
|
||||
* -------------------------------------------------------------------- */
|
||||
#include "math_helper.h"
|
||||
|
||||
/**
|
||||
* @brief Caluclation of SNR
|
||||
* @param[in] pRef Pointer to the reference buffer
|
||||
* @param[in] pTest Pointer to the test buffer
|
||||
* @param[in] buffSize total number of samples
|
||||
* @return SNR
|
||||
* The function Caluclates signal to noise ratio for the reference output
|
||||
* and test output
|
||||
*/
|
||||
|
||||
float arm_snr_f32(float *pRef, float *pTest, uint32_t buffSize)
|
||||
{
|
||||
float EnergySignal = 0.0, EnergyError = 0.0;
|
||||
uint32_t i;
|
||||
float SNR;
|
||||
int temp;
|
||||
int *test;
|
||||
|
||||
for (i = 0; i < buffSize; i++)
|
||||
{
|
||||
/* Checking for a NAN value in pRef array */
|
||||
test = (int *)(&pRef[i]);
|
||||
temp = *test;
|
||||
|
||||
if (temp == 0x7FC00000)
|
||||
{
|
||||
return(0);
|
||||
}
|
||||
|
||||
/* Checking for a NAN value in pTest array */
|
||||
test = (int *)(&pTest[i]);
|
||||
temp = *test;
|
||||
|
||||
if (temp == 0x7FC00000)
|
||||
{
|
||||
return(0);
|
||||
}
|
||||
EnergySignal += pRef[i] * pRef[i];
|
||||
EnergyError += (pRef[i] - pTest[i]) * (pRef[i] - pTest[i]);
|
||||
}
|
||||
|
||||
/* Checking for a NAN value in EnergyError */
|
||||
test = (int *)(&EnergyError);
|
||||
temp = *test;
|
||||
|
||||
if (temp == 0x7FC00000)
|
||||
{
|
||||
return(0);
|
||||
}
|
||||
|
||||
|
||||
SNR = 10 * log10 (EnergySignal / EnergyError);
|
||||
|
||||
return (SNR);
|
||||
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* @brief Provide guard bits for Input buffer
|
||||
* @param[in,out] input_buf Pointer to input buffer
|
||||
* @param[in] blockSize block Size
|
||||
* @param[in] guard_bits guard bits
|
||||
* @return none
|
||||
* The function Provides the guard bits for the buffer
|
||||
* to avoid overflow
|
||||
*/
|
||||
|
||||
void arm_provide_guard_bits_q15 (q15_t * input_buf, uint32_t blockSize,
|
||||
uint32_t guard_bits)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < blockSize; i++)
|
||||
{
|
||||
input_buf[i] = input_buf[i] >> guard_bits;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Converts float to fixed in q12.20 format
|
||||
* @param[in] pIn pointer to input buffer
|
||||
* @param[out] pOut pointer to outputbuffer
|
||||
* @param[in] numSamples number of samples in the input buffer
|
||||
* @return none
|
||||
* The function converts floating point values to fixed point(q12.20) values
|
||||
*/
|
||||
|
||||
void arm_float_to_q12_20(float *pIn, q31_t * pOut, uint32_t numSamples)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < numSamples; i++)
|
||||
{
|
||||
/* 1048576.0f corresponds to pow(2, 20) */
|
||||
pOut[i] = (q31_t) (pIn[i] * 1048576.0f);
|
||||
|
||||
pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
|
||||
|
||||
if (pIn[i] == (float) 1.0)
|
||||
{
|
||||
pOut[i] = 0x000FFFFF;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Compare MATLAB Reference Output and ARM Test output
|
||||
* @param[in] pIn Pointer to Ref buffer
|
||||
* @param[in] pOut Pointer to Test buffer
|
||||
* @param[in] numSamples number of samples in the buffer
|
||||
* @return maximum difference
|
||||
*/
|
||||
|
||||
uint32_t arm_compare_fixed_q15(q15_t *pIn, q15_t *pOut, uint32_t numSamples)
|
||||
{
|
||||
uint32_t i;
|
||||
int32_t diff, diffCrnt = 0;
|
||||
uint32_t maxDiff = 0;
|
||||
|
||||
for (i = 0; i < numSamples; i++)
|
||||
{
|
||||
diff = pIn[i] - pOut[i];
|
||||
diffCrnt = (diff > 0) ? diff : -diff;
|
||||
|
||||
if (diffCrnt > maxDiff)
|
||||
{
|
||||
maxDiff = diffCrnt;
|
||||
}
|
||||
}
|
||||
|
||||
return(maxDiff);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Compare MATLAB Reference Output and ARM Test output
|
||||
* @param[in] pIn Pointer to Ref buffer
|
||||
* @param[in] pOut Pointer to Test buffer
|
||||
* @param[in] numSamples number of samples in the buffer
|
||||
* @return maximum difference
|
||||
*/
|
||||
|
||||
uint32_t arm_compare_fixed_q31(q31_t *pIn, q31_t * pOut, uint32_t numSamples)
|
||||
{
|
||||
uint32_t i;
|
||||
int32_t diff, diffCrnt = 0;
|
||||
uint32_t maxDiff = 0;
|
||||
|
||||
for (i = 0; i < numSamples; i++)
|
||||
{
|
||||
diff = pIn[i] - pOut[i];
|
||||
diffCrnt = (diff > 0) ? diff : -diff;
|
||||
|
||||
if (diffCrnt > maxDiff)
|
||||
{
|
||||
maxDiff = diffCrnt;
|
||||
}
|
||||
}
|
||||
|
||||
return(maxDiff);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Provide guard bits for Input buffer
|
||||
* @param[in,out] input_buf Pointer to input buffer
|
||||
* @param[in] blockSize block Size
|
||||
* @param[in] guard_bits guard bits
|
||||
* @return none
|
||||
* The function Provides the guard bits for the buffer
|
||||
* to avoid overflow
|
||||
*/
|
||||
|
||||
void arm_provide_guard_bits_q31 (q31_t * input_buf,
|
||||
uint32_t blockSize,
|
||||
uint32_t guard_bits)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < blockSize; i++)
|
||||
{
|
||||
input_buf[i] = input_buf[i] >> guard_bits;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Provide guard bits for Input buffer
|
||||
* @param[in,out] input_buf Pointer to input buffer
|
||||
* @param[in] blockSize block Size
|
||||
* @param[in] guard_bits guard bits
|
||||
* @return none
|
||||
* The function Provides the guard bits for the buffer
|
||||
* to avoid overflow
|
||||
*/
|
||||
|
||||
void arm_provide_guard_bits_q7 (q7_t * input_buf,
|
||||
uint32_t blockSize,
|
||||
uint32_t guard_bits)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < blockSize; i++)
|
||||
{
|
||||
input_buf[i] = input_buf[i] >> guard_bits;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* @brief Caluclates number of guard bits
|
||||
* @param[in] num_adds number of additions
|
||||
* @return guard bits
|
||||
* The function Caluclates the number of guard bits
|
||||
* depending on the numtaps
|
||||
*/
|
||||
|
||||
uint32_t arm_calc_guard_bits (uint32_t num_adds)
|
||||
{
|
||||
uint32_t i = 1, j = 0;
|
||||
|
||||
if (num_adds == 1)
|
||||
{
|
||||
return (0);
|
||||
}
|
||||
|
||||
while (i < num_adds)
|
||||
{
|
||||
i = i * 2;
|
||||
j++;
|
||||
}
|
||||
|
||||
return (j);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Apply guard bits to buffer
|
||||
* @param[in,out] pIn pointer to input buffer
|
||||
* @param[in] numSamples number of samples in the input buffer
|
||||
* @param[in] guard_bits guard bits
|
||||
* @return none
|
||||
*/
|
||||
|
||||
void arm_apply_guard_bits (float32_t *pIn,
|
||||
uint32_t numSamples,
|
||||
uint32_t guard_bits)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < numSamples; i++)
|
||||
{
|
||||
pIn[i] = pIn[i] * arm_calc_2pow(guard_bits);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Calculates pow(2, numShifts)
|
||||
* @param[in] numShifts number of shifts
|
||||
* @return pow(2, numShifts)
|
||||
*/
|
||||
uint32_t arm_calc_2pow(uint32_t numShifts)
|
||||
{
|
||||
|
||||
uint32_t i, val = 1;
|
||||
|
||||
for (i = 0; i < numShifts; i++)
|
||||
{
|
||||
val = val * 2;
|
||||
}
|
||||
|
||||
return(val);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* @brief Converts float to fixed q14
|
||||
* @param[in] pIn pointer to input buffer
|
||||
* @param[out] pOut pointer to output buffer
|
||||
* @param[in] numSamples number of samples in the buffer
|
||||
* @return none
|
||||
* The function converts floating point values to fixed point values
|
||||
*/
|
||||
|
||||
void arm_float_to_q14 (float *pIn, q15_t *pOut, uint32_t numSamples)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < numSamples; i++)
|
||||
{
|
||||
/* 16384.0f corresponds to pow(2, 14) */
|
||||
pOut[i] = (q15_t) (pIn[i] * 16384.0f);
|
||||
|
||||
pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
|
||||
|
||||
if (pIn[i] == (float) 2.0)
|
||||
{
|
||||
pOut[i] = 0x7FFF;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* @brief Converts float to fixed q30 format
|
||||
* @param[in] pIn pointer to input buffer
|
||||
* @param[out] pOut pointer to output buffer
|
||||
* @param[in] numSamples number of samples in the buffer
|
||||
* @return none
|
||||
* The function converts floating point values to fixed point values
|
||||
*/
|
||||
|
||||
void arm_float_to_q30 (float *pIn, q31_t * pOut, uint32_t numSamples)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < numSamples; i++)
|
||||
{
|
||||
/* 1073741824.0f corresponds to pow(2, 30) */
|
||||
pOut[i] = (q31_t) (pIn[i] * 1073741824.0f);
|
||||
|
||||
pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
|
||||
|
||||
if (pIn[i] == (float) 2.0)
|
||||
{
|
||||
pOut[i] = 0x7FFFFFFF;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Converts float to fixed q30 format
|
||||
* @param[in] pIn pointer to input buffer
|
||||
* @param[out] pOut pointer to output buffer
|
||||
* @param[in] numSamples number of samples in the buffer
|
||||
* @return none
|
||||
* The function converts floating point values to fixed point values
|
||||
*/
|
||||
|
||||
void arm_float_to_q29 (float *pIn, q31_t *pOut, uint32_t numSamples)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < numSamples; i++)
|
||||
{
|
||||
/* 1073741824.0f corresponds to pow(2, 30) */
|
||||
pOut[i] = (q31_t) (pIn[i] * 536870912.0f);
|
||||
|
||||
pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
|
||||
|
||||
if (pIn[i] == (float) 4.0)
|
||||
{
|
||||
pOut[i] = 0x7FFFFFFF;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* @brief Converts float to fixed q28 format
|
||||
* @param[in] pIn pointer to input buffer
|
||||
* @param[out] pOut pointer to output buffer
|
||||
* @param[in] numSamples number of samples in the buffer
|
||||
* @return none
|
||||
* The function converts floating point values to fixed point values
|
||||
*/
|
||||
|
||||
void arm_float_to_q28 (float *pIn, q31_t *pOut, uint32_t numSamples)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < numSamples; i++)
|
||||
{
|
||||
/* 268435456.0f corresponds to pow(2, 28) */
|
||||
pOut[i] = (q31_t) (pIn[i] * 268435456.0f);
|
||||
|
||||
pOut[i] += pIn[i] > 0 ? 0.5 : -0.5;
|
||||
|
||||
if (pIn[i] == (float) 8.0)
|
||||
{
|
||||
pOut[i] = 0x7FFFFFFF;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Clip the float values to +/- 1
|
||||
* @param[in,out] pIn input buffer
|
||||
* @param[in] numSamples number of samples in the buffer
|
||||
* @return none
|
||||
* The function converts floating point values to fixed point values
|
||||
*/
|
||||
|
||||
void arm_clip_f32 (float *pIn, uint32_t numSamples)
|
||||
{
|
||||
uint32_t i;
|
||||
|
||||
for (i = 0; i < numSamples; i++)
|
||||
{
|
||||
if (pIn[i] > 1.0f)
|
||||
{
|
||||
pIn[i] = 1.0;
|
||||
}
|
||||
else if ( pIn[i] < -1.0f)
|
||||
{
|
||||
pIn[i] = -1.0;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -0,0 +1,63 @@
|
||||
/* ----------------------------------------------------------------------
|
||||
* Copyright (C) 2010-2013 ARM Limited. All rights reserved.
|
||||
*
|
||||
* $Date: 17. January 2013
|
||||
* $Revision: V1.4.0
|
||||
*
|
||||
* Project: CMSIS DSP Library
|
||||
*
|
||||
* Title: math_helper.h
|
||||
*
|
||||
* Description: Prototypes of all helper functions required.
|
||||
*
|
||||
* Target Processor: Cortex-M4/Cortex-M3
|
||||
*
|
||||
* 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"
|
||||
|
||||
#ifndef MATH_HELPER_H
|
||||
#define MATH_HELPER_H
|
||||
|
||||
float arm_snr_f32(float *pRef, float *pTest, uint32_t buffSize);
|
||||
void arm_float_to_q12_20(float *pIn, q31_t * pOut, uint32_t numSamples);
|
||||
void arm_provide_guard_bits_q15(q15_t *input_buf, uint32_t blockSize, uint32_t guard_bits);
|
||||
void arm_provide_guard_bits_q31(q31_t *input_buf, uint32_t blockSize, uint32_t guard_bits);
|
||||
void arm_float_to_q14(float *pIn, q15_t *pOut, uint32_t numSamples);
|
||||
void arm_float_to_q29(float *pIn, q31_t *pOut, uint32_t numSamples);
|
||||
void arm_float_to_q28(float *pIn, q31_t *pOut, uint32_t numSamples);
|
||||
void arm_float_to_q30(float *pIn, q31_t *pOut, uint32_t numSamples);
|
||||
void arm_clip_f32(float *pIn, uint32_t numSamples);
|
||||
uint32_t arm_calc_guard_bits(uint32_t num_adds);
|
||||
void arm_apply_guard_bits (float32_t * pIn, uint32_t numSamples, uint32_t guard_bits);
|
||||
uint32_t arm_compare_fixed_q15(q15_t *pIn, q15_t * pOut, uint32_t numSamples);
|
||||
uint32_t arm_compare_fixed_q31(q31_t *pIn, q31_t *pOut, uint32_t numSamples);
|
||||
uint32_t arm_calc_2pow(uint32_t guard_bits);
|
||||
#endif
|
||||
|
||||
Reference in New Issue
Block a user