32 lines
582 B
C
32 lines
582 B
C
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//This is very noisy for some reason, don't use for now.
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#ifndef _MP45DT02
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#define _MP45DT02
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//sampling frequency
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#define FS DFREQ
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#define VOLUME 10
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//PDM decimation factor
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#define DECIMATION 64
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#define MIC_IN_BUF_SIZE ((((FS/1000)*DECIMATION)/8)/2)
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#define MIC_OUT_BUF_SIZE (FS/1000)
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//i2s clock is clock for mic
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//clock for mic is calculated as Fs*decimation_factor
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//so we have to divide with 32 (frame_length*num_channels)
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//to get i2s sampling freq
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#define I2S_FS ((FS*DECIMATION)/(16*2))
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void InitMP45DT02();
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//called from interrpt
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void GotSample( int s );
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#endif
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