code/fe310/eos/i2s.h


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#include <stdint.h>

#define EOS_I2S_FMT_ALAW        0
#define EOS_I2S_FMT_PCM16       1

typedef struct EOSABuf {
    uint16_t idx_r;
    uint16_t idx_w;
    uint16_t size;
    uint8_t *array;
} EOSABuf;

typedef void (*eos_i2s_fptr_t) (unsigned char);

void eos_i2s_init(void);
void eos_i2s_start(uint32_t sample_rate, unsigned char fmt);
void eos_i2s_stop(void);
void eos_i2s_mic_init(uint8_t *mic_arr, uint16_t mic_arr_size);
void eos_i2s_mic_set_handler(eos_i2s_fptr_t wm_handler);
void eos_i2s_mic_set_wm(uint16_t wm);
uint16_t eos_i2s_mic_len(void);
uint16_t eos_i2s_mic_read(uint8_t *sample, uint16_t ssize);
int eos_i2s_mic_pop8(uint8_t *sample);
int eos_i2s_mic_pop16(uint16_t *sample);
void eos_i2s_spk_init(uint8_t *mic_arr, uint16_t mic_arr_size);
void eos_i2s_spk_set_handler(eos_i2s_fptr_t wm_handler);
void eos_i2s_spk_set_wm(uint16_t wm);
uint16_t eos_i2s_spk_len(void);
uint16_t eos_i2s_spk_write(uint8_t *sample, uint16_t ssize);
int eos_i2s_spk_push8(uint8_t sample);
int eos_i2s_spk_push16(uint16_t sample);