colorchord/embeddedstm32f407/mp45dt02.h

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//This is very noisy for some reason, don't use for now.
#ifndef _MP45DT02
#define _MP45DT02
2015-07-29 07:56:18 +02:00
#include "ccconfig.h"
//sampling frequency
#define FS DFREQ
#define VOLUME 10
//PDM decimation factor
#define DECIMATION 64
#define MIC_IN_BUF_SIZE ((((FS/1000)*DECIMATION)/8)/2)
#define MIC_OUT_BUF_SIZE (FS/1000)
//i2s clock is clock for mic
//clock for mic is calculated as Fs*decimation_factor
//so we have to divide with 32 (frame_length*num_channels)
//to get i2s sampling freq
#define I2S_FS ((FS*DECIMATION)/(16*2))
void InitMP45DT02();
//called from interrpt
void GotSample( int s );
#endif