void audio_dmic_init(AudioRate_Typedef Audio_Rate)
{
//alc mode select digital mode
reg_aud_alc_cfg &= ~FLD_AUD_ALC_ANALOG_MODE_EN;
//alc left channel select manual regulate, and set volume 0x28
reg_aud_alc_vol_l_chn = MASK_VAL( FLD_AUD_ALC_MIN_VOLUME_IN_DIGITAL_MODE, 0x028, \
FLD_AUD_ALC_DIGITAL_MODE_AUTO_REGULATE_EN, 0);
//1. Dfifo setting
reg_clk_en2 |= FLD_CLK2_DFIFO_EN; //enable dfifo clock, this will be initialed in cpu_wakeup_int()
reg_dfifo_mode = FLD_AUD_DFIFO0_IN | FLD_AUD_DFIFO0_L_INT;
//2. dmic input, dmic_0_data rising edge, mono mode, enable decimation filter
reg_dfifo_ain = MASK_VAL( FLD_AUD_DMIC0_DATA_IN_RISING_EDGE, AUDIO_DMIC_DATA_IN_RISING_EDGE,\
FLD_AUD_INPUT_SELECT, AUDIO_INPUT_DMIC, \
FLD_AUD_INPUT_MONO_MODE, 1, \
FLD_AUD_DECIMATION_FILTER_BYPASS, 0, \
FLD_AUD_DMIC_RISING_EDGE_BYPASS , 0, \
FLD_AUD_DMIC_FALLING_EDGE_BYPASS , 1);
reg_dfifo_dec_ratio = DMIC_CIC_Rate[Audio_Rate];//by minghai.duan 2019.7.24
////////////////////////////// ALC HPF LPF setting /////////////////////////////////
//enable hpf, enable lpf, anable alc, disable double_down_sampling
reg_aud_alc_hpf_lpf_ctrl = MASK_VAL( FLD_AUD_IN_HPF_SFT, 0x0f, //different pcb may set different value.
FLD_AUD_IN_HPF_BYPASS, 0, \
FLD_AUD_IN_ALC_BYPASS, 1, \
FLD_AUD_IN_LPF_BYPASS, 0, \
FLD_DOUBLE_DOWN_SAMPLING_ON, 1);
/*******1.Dmic setting for audio input**************************/
reg_audio_ctrl = AUDIO_OUTPUT_OFF;
audio_set_dmic_clk(0x89,0xD3); //48M * 0x09 / 0xD3 = 2.047393M
// audio_set_dmic_clk(0x0f,0xD3); //48M * 0x09 / 0xD3 = 2.047393M
}
