i2s_dma_chain.h

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/*
 * Copyright (c) 2021-2024 HPMicro
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 */
 
#ifndef I2S_DMA_CHAIN_H
#define I2S_DMA_CHAIN_H
 
#include "board.h"
 
 
#define APP_DMA_TX                BOARD_APP_HDMA
#define DMA_CHANNEL               (1U)
#define DMA_MUX_CHANNEL           DMA_SOC_CHN_TO_DMAMUX_CHN(APP_DMA_TX, DMA_CHANNEL)
#define DMA_MUX_SRC               HPM_DMA_SRC_I2S1_TX
#define TX_DATA_LEN               (32U)
 
/* I2S Master Transfer Format */
#define I2S_SAMPLE_RATE_HZ        (16000U)
#define I2S_SAMPLE_CHANNEL        (2U)
#define I2S_SAMPLE_BITDEPTH       i2s_audio_depth_32_bits
#define I2S_CHANNEL_LENGTH        i2s_channel_length_32_bits
 
/* DAO */
#define I2S_DAO                   DAO_I2S
#define I2S_DAO_CLK_NAME          clock_i2s1
#define I2S_DAO_DATA_LINE         (0U)
#define I2S_DAO_MCLK_FREQ_IN_HZ   (24576000UL)
 
#define CODEC_I2C                 BOARD_APP_I2C_BASE
#define CODEC_I2S                 BOARD_APP_I2S_BASE
#define CODEC_I2S_CLK_NAME        BOARD_APP_I2S_CLK_NAME
#define CODEC_I2S_DATA_LINE       BOARD_APP_I2S_RX_DATA_LINE
#define CODEC_BIT_WIDTH           (32U)
#define CODEC_SAMPLE_RATE_HZ      (16000U)
#define APP_DMA_RX                BOARD_APP_HDMA
#define I2S_MASTER_RX_LINE        CODEC_I2S_DATA_LINE
#define DMA_RX_CHANNEL            (0U)
#define DMA_MUX_RX_CHANNEL        DMA_SOC_CHN_TO_DMAMUX_CHN(APP_DMA_RX, DMA_RX_CHANNEL)
#define DMA_MUX_RX_SRC            HPM_DMA_SRC_I2S0_RX
 
#define  SAMPLE_FREQ              CODEC_SAMPLE_RATE_HZ
#define  SINWAVE_FREQ             (1000u)
#define  FFT_SHIFT                7
#define  FFT_POINTS               (1 << FFT_SHIFT)
#define  FFT_RESULT_SHIFT         18
#define  FFT_POINTS_DUAL          (FFT_POINTS * 2)
#define  FFT_RESULT_INDEX         (FFT_POINTS * SINWAVE_FREQ / SAMPLE_FREQ)
#define TEST_DELAY_COUNT          20
 
 
typedef float rfft_type_t;
 
/* I2S TX fuction */
 
void i2s_dao_config(uint32_t sample_rate, uint8_t audio_depth, uint8_t channel_num);
void dma_chain_transfer_config_tx(void);
void dma_auto_config_tx(void);
void i2s_dma_tx_init(void);
 
 
/* I2S RX fuction */
 
void fft_cal(rfft_type_t *buf, rfft_type_t *output, uint16_t points, uint16_t shift);
void dma_chain_transfer_config_rx(void);
void dma_auto_config_rx(void);
void codec_i2s_init(void);
void i2s_dma_rx_init(void);
void rx_data_process(void);
 
#endif /* I2S_DMA_CHAIN_H */