Mohsen Samadani / Mbed 2 deprecated Algorithm-testing

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Dependencies:   EALib I2S mbed

Audio/measureSignal.cpp@0:c05b00be2229, 2017-07-13 (annotated)

Committer:
msamadani
Date:
Thu Jul 13 19:33:37 2017 +0000
Revision:
0:c05b00be2229
bpFilter function works.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
msamadani 0:c05b00be2229 1
msamadani 0:c05b00be2229 2 #include "mbed.h"
msamadani 0:c05b00be2229 3 #include "measureSignal.h"
msamadani 0:c05b00be2229 4 #include "WM8731.h"
msamadani 0:c05b00be2229 5 #include "I2S.h"
msamadani 0:c05b00be2229 6
msamadani 0:c05b00be2229 7
msamadani 0:c05b00be2229 8 /* Define codec and I2S instances */
msamadani 0:c05b00be2229 9 WM8731 _codec(P0_27, P0_28);
msamadani 0:c05b00be2229 10 I2S _i2sTx(I2S_TRANSMIT, p11, p12, p13);
msamadani 0:c05b00be2229 11 I2S _i2sRx(I2S_RECEIVE, p14, p33, p34);
msamadani 0:c05b00be2229 12
msamadani 0:c05b00be2229 13
msamadani 0:c05b00be2229 14
msamadani 0:c05b00be2229 15 void measureSignal(int signal[],int fs,int N)
msamadani 0:c05b00be2229 16 {
msamadani 0:c05b00be2229 17
msamadani 0:c05b00be2229 18 printf("Sampling data....\n");
msamadani 0:c05b00be2229 19 int _rxBuf[16];
msamadani 0:c05b00be2229 20 int signalPtr=0;
msamadani 0:c05b00be2229 21
msamadani 0:c05b00be2229 22
msamadani 0:c05b00be2229 23 _codec.power(true);
msamadani 0:c05b00be2229 24 _codec.frequency(fs);
msamadani 0:c05b00be2229 25 _codec.wordsize(32);
msamadani 0:c05b00be2229 26 _codec.master(true);
msamadani 0:c05b00be2229 27 _codec.input_select(WM8731_MIC); //select mic as input.
msamadani 0:c05b00be2229 28 //_codec.input_power(true);
msamadani 0:c05b00be2229 29 //_codec.input_mute(false);
msamadani 0:c05b00be2229 30 //_codec.microphone_boost(true);
msamadani 0:c05b00be2229 31 _codec.start();
msamadani 0:c05b00be2229 32
msamadani 0:c05b00be2229 33 _i2sRx.frequency(fs);
msamadani 0:c05b00be2229 34 _i2sRx.wordsize(32);
msamadani 0:c05b00be2229 35 _i2sRx.stereomono(I2S_STEREO);
msamadani 0:c05b00be2229 36 _i2sRx.masterslave(I2S_SLAVE);
msamadani 0:c05b00be2229 37 //_i2sRx.set_interrupt_fifo_level(7);
msamadani 0:c05b00be2229 38 _i2sRx.start();
msamadani 0:c05b00be2229 39
msamadani 0:c05b00be2229 40 wait(0.5);
msamadani 0:c05b00be2229 41
msamadani 0:c05b00be2229 42 while (signalPtr<N) {
msamadani 0:c05b00be2229 43 int to_read = _i2sRx.fifo_points(); //Find out how many stereo samples to read
msamadani 0:c05b00be2229 44 _i2sRx.read(_rxBuf, to_read);
msamadani 0:c05b00be2229 45
msamadani 0:c05b00be2229 46 //Loop through all stereo samples
msamadani 0:c05b00be2229 47 for(int i = 0; i <to_read; i+=2) {
msamadani 0:c05b00be2229 48 //Only fill echo buffer with right side samples, i.e., ignore rxBuf[i+1] content
msamadani 0:c05b00be2229 49 signal[signalPtr] = _rxBuf[i];
msamadani 0:c05b00be2229 50
msamadani 0:c05b00be2229 51 //Increment echo buffer write pointer and check for wrap-around
msamadani 0:c05b00be2229 52 signalPtr++;
msamadani 0:c05b00be2229 53 }
msamadani 0:c05b00be2229 54 }
msamadani 0:c05b00be2229 55 _codec.stop();
msamadani 0:c05b00be2229 56 _i2sRx.stop();
msamadani 0:c05b00be2229 57 printf("Signal sampled.\n\n");
msamadani 0:c05b00be2229 58 }