Move firmware into subdirectory

1 files changed, 204 insertions, 0 deletions

diff --git a/fw/hid-dials/Drivers/CMSIS/DSP/Examples/ARM/arm_variance_example/arm_variance_example_f32.c b/fw/hid-dials/Drivers/CMSIS/DSP/Examples/ARM/arm_variance_example/arm_variance_example_f32.c
new file mode 100644
index 0000000..78a0681
--- /dev/null
+++ b/fw/hid-dials/Drivers/CMSIS/DSP/Examples/ARM/arm_variance_example/arm_variance_example_f32.c
@@ -0,0 +1,204 @@
+/* ----------------------------------------------------------------------

+* Copyright (C) 2010-2012 ARM Limited. All rights reserved.

+*

+* $Date:         17. January 2013

+* $Revision:     V1.4.0

+*

+* Project:       CMSIS DSP Library

+* Title:         arm_variance_example_f32.c

+*

+* Description:   Example code demonstrating variance calculation of input sequence.

+*

+* 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 VarianceExample Variance Example

+ *

+ * \par Description:

+ * \par

+ * Demonstrates the use of Basic Math and Support Functions to calculate the variance of an

+ * input sequence with N samples. Uniformly distributed white noise is taken as input.

+ *

+ * \par Algorithm:

+ * \par

+ * The variance of a sequence is the mean of the squared deviation of the sequence from its mean.

+ * \par

+ * This is denoted by the following equation:

+ * <pre> variance = ((x[0] - x') * (x[0] - x') + (x[1] - x') * (x[1] - x') + ... + * (x[n-1] - x') * (x[n-1] - x')) / (N-1)</pre>

+ * where, <code>x[n]</code> is the input sequence, <code>N</code> is the number of input samples, and

+ * <code>x'</code> is the mean value of the input sequence, <code>x[n]</code>.

+ * \par

+ * The mean value <code>x'</code> is defined as:

+ * <pre> x' = (x[0] + x[1] + ... + x[n-1]) / N</pre>

+ *

+ * \par Block Diagram:

+ * \par

+ * \image html Variance.gif

+ *

+ *

+ * \par Variables Description:

+ * \par

+ * \li \c testInput_f32 points to the input data

+ * \li \c wire1, \c wir2, \c wire3 temporary buffers

+ * \li \c blockSize number of samples processed at a time

+ * \li \c refVarianceOut reference variance value

+ *

+ * \par CMSIS DSP Software Library Functions Used:

+ * \par

+ * - arm_dot_prod_f32()

+ * - arm_mult_f32()

+ * - arm_sub_f32()

+ * - arm_fill_f32()

+ * - arm_copy_f32()

+ *

+ * <b> Refer  </b>

+ * \link arm_variance_example_f32.c \endlink

+ *

+ */

+

+

+/** \example arm_variance_example_f32.c

+  */

+#include <math.h>

+#include "arm_math.h"

+

+/* ----------------------------------------------------------------------

+* Defines each of the tests performed

+* ------------------------------------------------------------------- */

+#define MAX_BLOCKSIZE   32

+#define DELTA           (0.000001f)

+

+

+/* ----------------------------------------------------------------------

+* Declare I/O buffers

+* ------------------------------------------------------------------- */

+float32_t wire1[MAX_BLOCKSIZE];

+float32_t wire2[MAX_BLOCKSIZE];

+float32_t wire3[MAX_BLOCKSIZE];

+

+/* ----------------------------------------------------------------------

+* Test input data for Floating point Variance example for 32-blockSize

+* Generated by the MATLAB randn() function

+* ------------------------------------------------------------------- */

+

+float32_t testInput_f32[32] =

+{

+  -0.432564811528221,  -1.665584378238097,   0.125332306474831,   0.287676420358549,

+  -1.146471350681464,   1.190915465642999,   1.189164201652103,  -0.037633276593318,

+   0.327292361408654,   0.174639142820925,  -0.186708577681439,   0.725790548293303,

+  -0.588316543014189,   2.183185818197101,  -0.136395883086596,   0.113931313520810,

+   1.066768211359189,   0.059281460523605,  -0.095648405483669,  -0.832349463650022,

+   0.294410816392640,  -1.336181857937804,   0.714324551818952,   1.623562064446271,

+  -0.691775701702287,   0.857996672828263,   1.254001421602532,  -1.593729576447477,

+  -1.440964431901020,   0.571147623658178,  -0.399885577715363,   0.689997375464345

+

+};

+

+/* ----------------------------------------------------------------------

+* Declare Global variables

+* ------------------------------------------------------------------- */

+uint32_t blockSize = 32;

+float32_t  refVarianceOut = 0.903941793931839;

+

+/* ----------------------------------------------------------------------

+* Variance calculation test

+* ------------------------------------------------------------------- */

+

+int32_t main(void)

+{

+  arm_status status;

+  float32_t mean, oneByBlockSize;

+  float32_t variance;

+  float32_t diff;

+

+  status = ARM_MATH_SUCCESS;

+

+  /* Calculation of mean value of input */

+

+  /* x' = 1/blockSize * (x(0)* 1 + x(1) * 1 + ... + x(n-1) * 1) */

+

+  /* Fill wire1 buffer with 1.0 value */

+  arm_fill_f32(1.0,  wire1, blockSize);

+

+  /* Calculate the dot product of wire1 and wire2 */

+  /* (x(0)* 1 + x(1) * 1 + ...+ x(n-1) * 1) */

+  arm_dot_prod_f32(testInput_f32, wire1, blockSize, &mean);

+

+  /* Calculation of 1/blockSize */

+  oneByBlockSize = 1.0 / (blockSize);

+

+  /* 1/blockSize * (x(0)* 1 + x(1) * 1 + ... + x(n-1) * 1)  */

+  arm_mult_f32(&mean, &oneByBlockSize, &mean, 1);

+

+

+  /* Calculation of variance value of input */

+

+  /* (1/blockSize) * (x(0) - x') * (x(0) - x') + (x(1) - x') * (x(1) - x') + ... + (x(n-1) - x') * (x(n-1) - x') */

+

+  /* Fill wire2 with mean value x' */

+  arm_fill_f32(mean,  wire2, blockSize);

+

+  /* wire3 contains (x-x') */

+  arm_sub_f32(testInput_f32, wire2, wire3, blockSize);

+

+  /* wire2 contains (x-x') */

+  arm_copy_f32(wire3, wire2, blockSize);

+

+  /* (x(0) - x') * (x(0) - x') + (x(1) - x') * (x(1) - x') + ... + (x(n-1) - x') * (x(n-1) - x') */

+  arm_dot_prod_f32(wire2, wire3, blockSize, &variance);

+

+    /* Calculation of 1/blockSize */

+  oneByBlockSize = 1.0 / (blockSize - 1);

+

+  /* Calculation of variance */

+  arm_mult_f32(&variance, &oneByBlockSize, &variance, 1);

+

+  /* absolute value of difference between ref and test */

+  diff = fabsf(refVarianceOut - variance);

+

+  /* Comparison of variance value with reference */

+  if (diff > DELTA)

+  {

+    status = ARM_MATH_TEST_FAILURE;

+  }

+

+  if ( status != ARM_MATH_SUCCESS)

+  {

+    while (1);

+  }

+

+  while (1);                             /* main function does not return */

+}

+

+ /** \endlink */