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| author | Julian Oes <julian@oes.ch> | 2013-05-17 11:24:02 +0200 |
|---|---|---|
| committer | Julian Oes <julian@oes.ch> | 2013-05-17 11:24:02 +0200 |
| commit | f5c157e74df12a0cb36b7d27cdad9828d96cc534 (patch) | |
| tree | 3f758990921a7b52df8afe5131a8298b1141b6f4 /src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_lms_init_f32.c | |
| parent | 80e8eeab2931e79e31adb17c93f5794e666c5763 (diff) | |
| parent | fa816d0fd65da461fd5bf8803cf00caebaf23c5c (diff) | |
| download | px4-firmware-f5c157e74df12a0cb36b7d27cdad9828d96cc534.tar.gz px4-firmware-f5c157e74df12a0cb36b7d27cdad9828d96cc534.tar.bz2 px4-firmware-f5c157e74df12a0cb36b7d27cdad9828d96cc534.zip | |
Merge remote-tracking branch 'upstream/master' into new_state_machine
Conflicts:
src/drivers/px4io/px4io.cpp
src/modules/commander/commander.c
src/modules/commander/state_machine_helper.c
Diffstat (limited to 'src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_lms_init_f32.c')
| -rw-r--r-- | src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_lms_init_f32.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_lms_init_f32.c b/src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_lms_init_f32.c new file mode 100644 index 000000000..a2f51240a --- /dev/null +++ b/src/modules/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_lms_init_f32.c @@ -0,0 +1,90 @@ +/*-----------------------------------------------------------------------------
+* Copyright (C) 2010 ARM Limited. All rights reserved.
+*
+* $Date: 15. February 2012
+* $Revision: V1.1.0
+*
+* Project: CMSIS DSP Library
+* Title: arm_lms_init_f32.c
+*
+* Description: Floating-point LMS filter initialization function.
+*
+* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
+*
+* Version 1.1.0 2012/02/15
+* Updated with more optimizations, bug fixes and minor API changes.
+*
+* Version 1.0.10 2011/7/15
+* Big Endian support added and Merged M0 and M3/M4 Source code.
+*
+* Version 1.0.3 2010/11/29
+* Re-organized the CMSIS folders and updated documentation.
+*
+* Version 1.0.2 2010/11/11
+* Documentation updated.
+*
+* Version 1.0.1 2010/10/05
+* Production release and review comments incorporated.
+*
+* Version 1.0.0 2010/09/20
+* Production release and review comments incorporated
+*
+* Version 0.0.7 2010/06/10
+* Misra-C changes done
+* ---------------------------------------------------------------------------*/
+
+#include "arm_math.h"
+
+/**
+ * @addtogroup LMS
+ * @{
+ */
+
+ /**
+ * @brief Initialization function for floating-point LMS filter.
+ * @param[in] *S points to an instance of the floating-point LMS filter structure.
+ * @param[in] numTaps number of filter coefficients.
+ * @param[in] *pCoeffs points to the coefficient buffer.
+ * @param[in] *pState points to state buffer.
+ * @param[in] mu step size that controls filter coefficient updates.
+ * @param[in] blockSize number of samples to process.
+ * @return none.
+ */
+
+/**
+ * \par Description:
+ * <code>pCoeffs</code> points to the array of filter coefficients stored in time reversed order:
+ * <pre>
+ * {b[numTaps-1], b[numTaps-2], b[N-2], ..., b[1], b[0]}
+ * </pre>
+ * The initial filter coefficients serve as a starting point for the adaptive filter.
+ * <code>pState</code> points to an array of length <code>numTaps+blockSize-1</code> samples, where <code>blockSize</code> is the number of input samples processed by each call to <code>arm_lms_f32()</code>.
+ */
+
+void arm_lms_init_f32(
+ arm_lms_instance_f32 * S,
+ uint16_t numTaps,
+ float32_t * pCoeffs,
+ float32_t * pState,
+ float32_t mu,
+ uint32_t blockSize)
+{
+ /* Assign filter taps */
+ S->numTaps = numTaps;
+
+ /* Assign coefficient pointer */
+ S->pCoeffs = pCoeffs;
+
+ /* Clear state buffer and size is always blockSize + numTaps */
+ memset(pState, 0, (numTaps + (blockSize - 1)) * sizeof(float32_t));
+
+ /* Assign state pointer */
+ S->pState = pState;
+
+ /* Assign Step size value */
+ S->mu = mu;
+}
+
+/**
+ * @} end of LMS group
+ */
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