67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/* Copyright 2018 Canaan Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stddef.h>
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#include "dmac.h"
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#include "fft.h"
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#include "sysctl.h"
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#include "utils.h"
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static volatile fft_t *const fft = (volatile fft_t *)FFT_BASE_ADDR;
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static void fft_init(uint8_t point, uint8_t mode, uint16_t shift, uint8_t is_dma, uint8_t input_mode, uint8_t data_mode)
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{
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fft->fft_ctrl.fft_point = point;
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fft->fft_ctrl.fft_mode = mode;
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fft->fft_ctrl.fft_shift = shift;
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fft->fft_ctrl.dma_send = is_dma;
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fft->fft_ctrl.fft_enable = 1;
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fft->fft_ctrl.fft_input_mode = input_mode;
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fft->fft_ctrl.fft_data_mode = data_mode;
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}
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void fft_complex_uint16_dma(dmac_channel_number_t dma_send_channel_num, dmac_channel_number_t dma_receive_channel_num,
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uint16_t shift, fft_direction_t direction, const uint64_t *input, size_t point_num, uint64_t *output)
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{
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fft_point_t point = FFT_512;
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switch(point_num)
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{
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case 512:
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point = FFT_512;
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break;
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case 256:
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point = FFT_256;
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break;
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case 128:
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point = FFT_128;
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break;
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case 64:
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point = FFT_64;
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break;
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default:
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configASSERT(!"fft point error");
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break;
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}
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sysctl_clock_enable(SYSCTL_CLOCK_FFT);
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sysctl_reset(SYSCTL_RESET_FFT);
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fft_init(point, direction, shift, 1, 0, 0);
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sysctl_dma_select(dma_receive_channel_num, SYSCTL_DMA_SELECT_FFT_RX_REQ);
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sysctl_dma_select(dma_send_channel_num, SYSCTL_DMA_SELECT_FFT_TX_REQ);
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dmac_set_single_mode(dma_receive_channel_num, (void *)(&fft->fft_output_fifo), output, DMAC_ADDR_NOCHANGE, DMAC_ADDR_INCREMENT,
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DMAC_MSIZE_4, DMAC_TRANS_WIDTH_64, point_num >> 1);
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dmac_set_single_mode(dma_send_channel_num, input, (void *)(&fft->fft_input_fifo), DMAC_ADDR_INCREMENT, DMAC_ADDR_NOCHANGE,
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DMAC_MSIZE_4, DMAC_TRANS_WIDTH_64, point_num >> 1);
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dmac_wait_done(dma_receive_channel_num);
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}
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