2015-07-21 03:22:19 +02:00
|
|
|
//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"
|
2015-07-21 03:22:19 +02:00
|
|
|
|
|
|
|
|
//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
|
|
|
|
|
|
