69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
/* Copyright 2018 Canaan Inc.
|
|
*
|
|
* 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
|
|
*
|
|
* http://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 <stddef.h>
|
|
#include "dmac.h"
|
|
#include "utils.h"
|
|
#include "sysctl.h"
|
|
#include "fft.h"
|
|
|
|
static volatile fft_t *const fft = (volatile fft_t *)FFT_BASE_ADDR;
|
|
|
|
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)
|
|
{
|
|
fft->fft_ctrl.fft_point = point;
|
|
fft->fft_ctrl.fft_mode = mode;
|
|
fft->fft_ctrl.fft_shift = shift;
|
|
fft->fft_ctrl.dma_send = is_dma;
|
|
fft->fft_ctrl.fft_enable = 1;
|
|
fft->fft_ctrl.fft_input_mode = input_mode;
|
|
fft->fft_ctrl.fft_data_mode = data_mode;
|
|
}
|
|
|
|
void fft_complex_uint16_dma(dmac_channel_number_t dma_send_channel_num, dmac_channel_number_t dma_receive_channel_num,
|
|
uint16_t shift, fft_direction_t direction, const uint64_t *input, size_t point_num, uint64_t *output)
|
|
{
|
|
fft_point_t point = FFT_512;
|
|
switch(point_num)
|
|
{
|
|
case 512:
|
|
point = FFT_512;
|
|
break;
|
|
case 256:
|
|
point = FFT_256;
|
|
break;
|
|
case 128:
|
|
point = FFT_128;
|
|
break;
|
|
case 64:
|
|
point = FFT_64;
|
|
break;
|
|
default:
|
|
configASSERT(!"fft point error");
|
|
break;
|
|
}
|
|
sysctl_clock_enable(SYSCTL_CLOCK_FFT);
|
|
sysctl_reset(SYSCTL_RESET_FFT);
|
|
fft_init(point, direction, shift, 1, 0, 0);
|
|
sysctl_dma_select(dma_receive_channel_num, SYSCTL_DMA_SELECT_FFT_RX_REQ);
|
|
sysctl_dma_select(dma_send_channel_num, SYSCTL_DMA_SELECT_FFT_TX_REQ);
|
|
dmac_set_single_mode(dma_receive_channel_num, (void *)(&fft->fft_output_fifo), output, DMAC_ADDR_NOCHANGE, DMAC_ADDR_INCREMENT,
|
|
DMAC_MSIZE_4, DMAC_TRANS_WIDTH_64, point_num>>1);
|
|
dmac_set_single_mode(dma_send_channel_num, input, (void *)(&fft->fft_input_fifo), DMAC_ADDR_INCREMENT, DMAC_ADDR_NOCHANGE,
|
|
DMAC_MSIZE_4, DMAC_TRANS_WIDTH_64, point_num>>1);
|
|
dmac_wait_done(dma_receive_channel_num);
|
|
}
|
|
|
|
|