Demo Team / mbed-IBooth-ETH

mbed Sensor node for Instrumented Booth over ETH.

Dependencies:   EthernetInterface-1 MaxbotixDriver Presence HTU21D_TEMP_HUMID_SENSOR_SAMPLE Resources SHARPIR mbed-rtos mbed-src WDT_K64F nsdl_lib

Fork of Trenton_Switch_LPC1768_ETH by Demo Team

MAX9814/MAX9814.cpp@46:807e9cf63f4c, 2015-07-16 (annotated)

Committer:
andcor02
Date:
Thu Jul 16 13:28:49 2015 +0000
Revision:
46:807e9cf63f4c
Parent:
25:cb16c5248769 
Added Serial VCOM debug over USB.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andcor02 25:cb16c5248769 1 /*
andcor02 25:cb16c5248769 2 MAX9814.cpp - MAX9814 sensor library
andcor02 25:cb16c5248769 3 Developed by Andrea Corrado
andcor02 25:cb16c5248769 4 */
andcor02 25:cb16c5248769 5
andcor02 25:cb16c5248769 6 #include "mbed.h"
andcor02 25:cb16c5248769 7 #include "MAX9814.h"
andcor02 25:cb16c5248769 8
andcor02 25:cb16c5248769 9 MAX9814::MAX9814(PinName pin): _pin(pin) { //, _led1(LED1), _led2(LED2), _led3(LED3) {
andcor02 25:cb16c5248769 10
andcor02 25:cb16c5248769 11 }
andcor02 25:cb16c5248769 12
andcor02 25:cb16c5248769 13
andcor02 25:cb16c5248769 14
andcor02 25:cb16c5248769 15 float MAX9814::sound_level() {
andcor02 25:cb16c5248769 16
andcor02 25:cb16c5248769 17 _t.start();
andcor02 25:cb16c5248769 18 float peakToPeak=0, signalMax=0, signalMin=1024;
andcor02 25:cb16c5248769 19
andcor02 25:cb16c5248769 20 while (_t.read_ms()<50) {
andcor02 25:cb16c5248769 21 _sample=_pin.read();
andcor02 25:cb16c5248769 22
andcor02 25:cb16c5248769 23 if (_sample<1024) {
andcor02 25:cb16c5248769 24 if (_sample>signalMax)
andcor02 25:cb16c5248769 25 signalMax=_sample;
andcor02 25:cb16c5248769 26
andcor02 25:cb16c5248769 27 else if (_sample<signalMin)
andcor02 25:cb16c5248769 28 signalMin=_sample;
andcor02 25:cb16c5248769 29 }
andcor02 25:cb16c5248769 30 }
andcor02 25:cb16c5248769 31 _t.stop();
andcor02 25:cb16c5248769 32 _t.reset();
andcor02 25:cb16c5248769 33 peakToPeak=signalMax-signalMin;
andcor02 25:cb16c5248769 34 _value= (peakToPeak*3.3);
andcor02 25:cb16c5248769 35 _value = floor(_value * 100) / 100;
andcor02 25:cb16c5248769 36
andcor02 25:cb16c5248769 37 return _value;
andcor02 25:cb16c5248769 38 }