From aa38e5c1f48e31213ee349aa5cd6f06c85bda70d Mon Sep 17 00:00:00 2001
From: android <android@lingyun.com>
Date: Tue, 25 Jun 2024 21:49:39 +0800
Subject: [PATCH] Add GD32F103RCT6 ADC converter board SDK source code
---
mcu_sdk/gd32f103/rk_eFire/Board/CMSIS/DSP/Source/TransformFunctions/arm_rfft_fast_init_f32.c | 131 +++++++++++++++++++++++++++++++++++++++++++
1 files changed, 131 insertions(+), 0 deletions(-)
diff --git a/mcu_sdk/gd32f103/rk_eFire/Board/CMSIS/DSP/Source/TransformFunctions/arm_rfft_fast_init_f32.c b/mcu_sdk/gd32f103/rk_eFire/Board/CMSIS/DSP/Source/TransformFunctions/arm_rfft_fast_init_f32.c
new file mode 100644
index 0000000..6f6c2f9
--- /dev/null
+++ b/mcu_sdk/gd32f103/rk_eFire/Board/CMSIS/DSP/Source/TransformFunctions/arm_rfft_fast_init_f32.c
@@ -0,0 +1,131 @@
+/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_cfft_init_f32.c
+ * Description: Split Radix Decimation in Frequency CFFT Floating point processing function
+ *
+ * $Date: 27. January 2017
+ * $Revision: V.1.5.1
+ *
+ * Target Processor: Cortex-M cores
+ * -------------------------------------------------------------------- */
+/*
+ * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "arm_math.h"
+#include "arm_common_tables.h"
+
+/**
+ * @ingroup groupTransforms
+ */
+
+/**
+ * @addtogroup RealFFT
+ * @{
+ */
+
+/**
+* @brief Initialization function for the floating-point real FFT.
+* @param[in,out] *S points to an arm_rfft_fast_instance_f32 structure.
+* @param[in] fftLen length of the Real Sequence.
+* @return The function returns ARM_MATH_SUCCESS if initialization is successful or ARM_MATH_ARGUMENT_ERROR if <code>fftLen</code> is not a supported value.
+*
+* \par Description:
+* \par
+* The parameter <code>fftLen</code> Specifies length of RFFT/CIFFT process. Supported FFT Lengths are 32, 64, 128, 256, 512, 1024, 2048, 4096.
+* \par
+* This Function also initializes Twiddle factor table pointer and Bit reversal table pointer.
+*/
+arm_status arm_rfft_fast_init_f32(
+ arm_rfft_fast_instance_f32 * S,
+ uint16_t fftLen)
+{
+ arm_cfft_instance_f32 * Sint;
+ /* Initialise the default arm status */
+ arm_status status = ARM_MATH_SUCCESS;
+ /* Initialise the FFT length */
+ Sint = &(S->Sint);
+ Sint->fftLen = fftLen/2;
+ S->fftLenRFFT = fftLen;
+
+ /* Initializations of structure parameters depending on the FFT length */
+ switch (Sint->fftLen)
+ {
+ case 2048U:
+ /* Initializations of structure parameters for 2048 point FFT */
+ /* Initialise the bit reversal table length */
+ Sint->bitRevLength = ARMBITREVINDEXTABLE_2048_TABLE_LENGTH;
+ /* Initialise the bit reversal table pointer */
+ Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable2048;
+ /* Initialise the Twiddle coefficient pointers */
+ Sint->pTwiddle = (float32_t *) twiddleCoef_2048;
+ S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_4096;
+ break;
+ case 1024U:
+ Sint->bitRevLength = ARMBITREVINDEXTABLE_1024_TABLE_LENGTH;
+ Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable1024;
+ Sint->pTwiddle = (float32_t *) twiddleCoef_1024;
+ S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_2048;
+ break;
+ case 512U:
+ Sint->bitRevLength = ARMBITREVINDEXTABLE_512_TABLE_LENGTH;
+ Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable512;
+ Sint->pTwiddle = (float32_t *) twiddleCoef_512;
+ S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_1024;
+ break;
+ case 256U:
+ Sint->bitRevLength = ARMBITREVINDEXTABLE_256_TABLE_LENGTH;
+ Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable256;
+ Sint->pTwiddle = (float32_t *) twiddleCoef_256;
+ S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_512;
+ break;
+ case 128U:
+ Sint->bitRevLength = ARMBITREVINDEXTABLE_128_TABLE_LENGTH;
+ Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable128;
+ Sint->pTwiddle = (float32_t *) twiddleCoef_128;
+ S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_256;
+ break;
+ case 64U:
+ Sint->bitRevLength = ARMBITREVINDEXTABLE_64_TABLE_LENGTH;
+ Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable64;
+ Sint->pTwiddle = (float32_t *) twiddleCoef_64;
+ S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_128;
+ break;
+ case 32U:
+ Sint->bitRevLength = ARMBITREVINDEXTABLE_32_TABLE_LENGTH;
+ Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable32;
+ Sint->pTwiddle = (float32_t *) twiddleCoef_32;
+ S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_64;
+ break;
+ case 16U:
+ Sint->bitRevLength = ARMBITREVINDEXTABLE_16_TABLE_LENGTH;
+ Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable16;
+ Sint->pTwiddle = (float32_t *) twiddleCoef_16;
+ S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_32;
+ break;
+ default:
+ /* Reporting argument error if fftSize is not valid value */
+ status = ARM_MATH_ARGUMENT_ERROR;
+ break;
+ }
+
+ return (status);
+}
+
+/**
+ * @} end of RealFFT group
+ */
--
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