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| author | px4dev <px4@purgatory.org> | 2013-01-06 12:52:05 -0800 |
|---|---|---|
| committer | px4dev <px4@purgatory.org> | 2013-01-06 12:52:05 -0800 |
| commit | 4447282260be0780eb6e36f5e953bf56888a5688 (patch) | |
| tree | 3ba1e976d998d433397343b79a0612af52075aef /apps/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_iir_lattice_init_q15.c | |
| parent | 659543f852d18197f68fafee5db5671567b74f4b (diff) | |
| download | px4-firmware-4447282260be0780eb6e36f5e953bf56888a5688.tar.gz px4-firmware-4447282260be0780eb6e36f5e953bf56888a5688.tar.bz2 px4-firmware-4447282260be0780eb6e36f5e953bf56888a5688.zip | |
Integrate the interesting parts of the CMSIS 3.01 (r3p1) DSP library
Diffstat (limited to 'apps/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_iir_lattice_init_q15.c')
| -rw-r--r-- | apps/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_iir_lattice_init_q15.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/apps/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_iir_lattice_init_q15.c b/apps/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_iir_lattice_init_q15.c new file mode 100644 index 000000000..7dac99fca --- /dev/null +++ b/apps/mathlib/CMSIS/DSP_Lib/Source/FilteringFunctions/arm_iir_lattice_init_q15.c @@ -0,0 +1,86 @@ +/*-----------------------------------------------------------------------------
+* Copyright (C) 2010 ARM Limited. All rights reserved.
+*
+* $Date: 15. February 2012
+* $Revision: V1.1.0
+*
+* Project: CMSIS DSP Library
+* Title: arm_iir_lattice_init_q15.c
+*
+* Description: Q15 IIR lattice 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"
+
+/**
+ * @ingroup groupFilters
+ */
+
+/**
+ * @addtogroup IIR_Lattice
+ * @{
+ */
+
+ /**
+ * @brief Initialization function for the Q15 IIR lattice filter.
+ * @param[in] *S points to an instance of the Q15 IIR lattice structure.
+ * @param[in] numStages number of stages in the filter.
+ * @param[in] *pkCoeffs points to reflection coefficient buffer. The array is of length numStages.
+ * @param[in] *pvCoeffs points to ladder coefficient buffer. The array is of length numStages+1.
+ * @param[in] *pState points to state buffer. The array is of length numStages+blockSize.
+ * @param[in] blockSize number of samples to process per call.
+ * @return none.
+ */
+
+void arm_iir_lattice_init_q15(
+ arm_iir_lattice_instance_q15 * S,
+ uint16_t numStages,
+ q15_t * pkCoeffs,
+ q15_t * pvCoeffs,
+ q15_t * pState,
+ uint32_t blockSize)
+{
+ /* Assign filter taps */
+ S->numStages = numStages;
+
+ /* Assign reflection coefficient pointer */
+ S->pkCoeffs = pkCoeffs;
+
+ /* Assign ladder coefficient pointer */
+ S->pvCoeffs = pvCoeffs;
+
+ /* Clear state buffer and size is always blockSize + numStages */
+ memset(pState, 0, (numStages + blockSize) * sizeof(q15_t));
+
+ /* Assign state pointer */
+ S->pState = pState;
+
+
+}
+
+/**
+ * @} end of IIR_Lattice group
+ */
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