93 lines
3 KiB
C
93 lines
3 KiB
C
/***************************************************************************
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*
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* Copyright 2015-2019 BES.
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* All rights reserved. All unpublished rights reserved.
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*
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* No part of this work may be used or reproduced in any form or by any
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* means, or stored in a database or retrieval system, without prior written
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* permission of BES.
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*
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* Use of this work is governed by a license granted by BES.
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* This work contains confidential and proprietary information of
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* BES. which is protected by copyright, trade secret,
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* trademark and other intellectual property rights.
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*
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****************************************************************************/
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#ifndef __HAL_HWFFT__
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#define __HAL_HWFFT__
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#ifdef __cplusplus
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extern "C" {
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#endif
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//#include "cmsis_os.h"
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#define HWFFT_USE_BUSY_WAIT 1
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#define HAVE_EQUIVALENT_MODE 1 /* 128in 128out not 128in 130out mode */
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struct hwfft_t {
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int mode;
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int order;
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int sym_fft;
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//osSemaphoreId _osSemaphoreId;
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// osSemaphoreDef_t _osSemaphoreDef;
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//#ifdef CMSIS_OS_RTX
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// uint32_t _semaphore_data[2];
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//#endif
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};
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enum hwfft_mode_t {
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HWFFT_MODE_FFT = 0x1,
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HWFFT_MODE_IFFT = 0x2,
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HWFFT_MODE_EQVL_FFT = 0x4,
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HWFFT_MODE_EQVL_IFFT = 0x8,
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};
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enum hwfft_order_t {
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HWFFT_ORDER_64SAMP = 64,
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HWFFT_ORDER_128SAMP = 128,
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HWFFT_ORDER_256SAMP = 256,
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HWFFT_ORDER_512SAMP = 512,
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};
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bool hwfft_is_enable(void);
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int hwfft_destroy(struct hwfft_t *fft_inst);
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/*
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生成hwfft_t 结构体
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mode: hwfft_mode_t类型HWFFT_MODE_FFT: 复数， 输入n个复数，输出n个复数，此时sym_fft必须为0；
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实数，输入n个实数，输出是n/2+1 个复数，此时sym_fft必须为1；
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HWFFT_MODE_IFFT: 复数， 输入n个复数，输出n个复数，此时sym_fft必须为0；
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实数，输入 n/2+1个复数，输出n个实数；此时sym_fft必须为1；
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HWFFT_MODE_EQVL_FFT: 兼容软件spx_fft计算fft模式
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HWFFT_MODE_EQVL_IFFT: 兼容软件spx_ifft计算ifft模式
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order: hwfft_order_t类型，支持 512/256/128/64 点的 fft/ifft
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sym_fft: 1: 将利用fft的对称性;对fft，输入n个实数，输出是n/2+1 个复数；
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对ifft， 输入 n/2+1个复数，输出n个实数；n 为fft/ifft点数
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0: 输入n个复数，输出n个复数
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*/
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int hwfft_create(struct hwfft_t *fft_inst, int mode, int order, int sym_fft);
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/*
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计算fft/ifft
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fft_inst: hwfft_create生成的对应结构体
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in: 输入buf
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out: 输出buf
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*/
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int hwfft_fft_process(struct hwfft_t *fft_inst, short *in, short *out);
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/*
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连续计算多次 fft/ifft
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fft_inst: hwfft_create生成的对应结构体
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in: 输入buf，多次fft的输入buf必须是连续的
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out: 输出buf
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num: 计算次数
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mode: 0 一直等到fft完成函数才返回
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1 dma配置完成，fft开始函数即可返回，cpu可以在硬件fft 时运行其他程序
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*/
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int hwfft_multifft_process(struct hwfft_t *fft_inst, short *in, short *out, unsigned short num,unsigned char mode);
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#ifdef __cplusplus
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}
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#endif
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#endif
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