Mathias Rasmussen / SoundSensor

Grove soundsensor lib

soundsensor.cpp@9:c38836e5d1f5, 2019-01-23 (annotated)

Committer:
math991e
Date:
Wed Jan 23 11:48:11 2019 +0000
Revision:
9:c38836e5d1f5
Parent:
8:5b4b258eb1da 
array fix

Who changed what in which revision?

UserRevisionLine numberNew contents of line
math991e 8:5b4b258eb1da 1 /**
math991e 8:5b4b258eb1da 2 * @file soundsensor.cpp
math991e 8:5b4b258eb1da 3 * @brief this cpp file is where all the logic is handled.
math991e 8:5b4b258eb1da 4 *
math991e 8:5b4b258eb1da 5 * @author Nikolaj M. & Mathias R.
math991e 8:5b4b258eb1da 6 *
math991e 8:5b4b258eb1da 7 * @date 23/1/2019
math991e 8:5b4b258eb1da 8 */
math991e 8:5b4b258eb1da 9
math991e 0:18d442efc99a 10 #include "soundsensor.h"
math991e 0:18d442efc99a 11
math991e 8:5b4b258eb1da 12 /**
math991e 8:5b4b258eb1da 13 * Constructor that sets pin to to take analog input form.
math991e 8:5b4b258eb1da 14 * @author Nikolaj M. & Mathias R.
math991e 8:5b4b258eb1da 15 * @param pin The pin that the sound sensor is placed
math991e 8:5b4b258eb1da 16 * @date 23/1/2019
math991e 8:5b4b258eb1da 17 */
math991e 0:18d442efc99a 18 soundsensor::soundsensor(PinName pin){
math991e 1:29daa2bdd0c6 19 soundsensor::setPin(pin);
math991e 0:18d442efc99a 20 }
math991e 0:18d442efc99a 21
math991e 8:5b4b258eb1da 22 /**
math991e 8:5b4b258eb1da 23 * Set function to set pin where sound sensor is placed.
math991e 8:5b4b258eb1da 24 * @author Nikolaj M. & Mathias R.
math991e 8:5b4b258eb1da 25 * @param pin The pin that the sound sensor is placed
math991e 8:5b4b258eb1da 26 * @date 23/1/2019
math991e 8:5b4b258eb1da 27 */
math991e 0:18d442efc99a 28 void soundsensor::setPin(PinName pin){
math991e 0:18d442efc99a 29 this->_pin=pin;
math991e 0:18d442efc99a 30 }
math991e 0:18d442efc99a 31
math991e 8:5b4b258eb1da 32
math991e 8:5b4b258eb1da 33 /**
math991e 8:5b4b258eb1da 34 * Get function to get pin where sound sensor is placed.
math991e 8:5b4b258eb1da 35 * @author Nikolaj M. & Mathias R.
math991e 8:5b4b258eb1da 36 * @return pin The pin that the sound sensor is placed
math991e 8:5b4b258eb1da 37 * @date 23/1/2019
math991e 8:5b4b258eb1da 38 */
math991e 0:18d442efc99a 39 PinName soundsensor::getPin(){
math991e 0:18d442efc99a 40 return this->_pin;
math991e 0:18d442efc99a 41 }
math991e 0:18d442efc99a 42
math991e 8:5b4b258eb1da 43 /**
math991e 8:5b4b258eb1da 44 * Function to convert sound sensor input to DB.
math991e 8:5b4b258eb1da 45 * @author Nikolaj M. & Mathias R.
math991e 8:5b4b258eb1da 46 * @input value Input value from sound sensor.
math991e 8:5b4b258eb1da 47 * @date 23/1/2019
math991e 8:5b4b258eb1da 48 */
math991e 0:18d442efc99a 49 float soundsensor::convertToDb(float value){
math991e 6:fb51a4b71646 50 return 16.801 * log(value/65535) + 9.872;
math991e 0:18d442efc99a 51 }
math991e 0:18d442efc99a 52
math991e 8:5b4b258eb1da 53
math991e 8:5b4b258eb1da 54 /**
math991e 8:5b4b258eb1da 55 * Function to convert sound sensor DB to raw input.
math991e 8:5b4b258eb1da 56 * @author Nikolaj M. & Mathias R.
math991e 8:5b4b258eb1da 57 * @input value DB value from sound sensor.
math991e 8:5b4b258eb1da 58 * @date 23/1/2019
math991e 8:5b4b258eb1da 59 */
math991e 0:18d442efc99a 60 float soundsensor::revertFromDb(float value){
math991e 0:18d442efc99a 61 /**
math991e 0:18d442efc99a 62 *CODE NEEDS TO BE IMPLEMENTED
math991e 0:18d442efc99a 63 **/
math991e 1:29daa2bdd0c6 64 return 0;
math991e 0:18d442efc99a 65 }
math991e 0:18d442efc99a 66
math991e 8:5b4b258eb1da 67
math991e 8:5b4b258eb1da 68 /**
math991e 8:5b4b258eb1da 69 * Takes raw input from sound sensor returns Db or raw input depending of input parameter in function.
math991e 8:5b4b258eb1da 70 * @author Nikolaj M. & Mathias R.
math991e 8:5b4b258eb1da 71 * @input toDb value that sets to true or false depending if return should be db og raw input.
math991e 8:5b4b258eb1da 72 * @date 23/1/2019
math991e 8:5b4b258eb1da 73 */
math991e 0:18d442efc99a 74 float soundsensor::listen(bool toDb){
math991e 1:29daa2bdd0c6 75 AnalogIn sensor(this->getPin());
math991e 9:c38836e5d1f5 76 int values[100 + 1];
math991e 6:fb51a4b71646 77 float sum;
math991e 6:fb51a4b71646 78 float average;
math991e 3:372e67c123c3 79
math991e 8:5b4b258eb1da 80 ///Run through for loop to get average of 100 readings to make an more avarage calculation
math991e 3:372e67c123c3 81 for(int i=0;i<100;i++){
math991e 8:5b4b258eb1da 82 ///This calculation of db is not precise and reliable
math991e 8:5b4b258eb1da 83 values[i] = soundSensor.read() * 3.3;
math991e 3:372e67c123c3 84 wait(0.0001);
math991e 3:372e67c123c3 85 }
math991e 3:372e67c123c3 86
math991e 3:372e67c123c3 87 for(int j=0;j<100;j++){
math991e 3:372e67c123c3 88 sum += values[j];
math991e 3:372e67c123c3 89 }
math991e 3:372e67c123c3 90 average = sum/100;
math991e 8:5b4b258eb1da 91
math991e 8:5b4b258eb1da 92 ///This returns either db or raw input depending of paramater input of function
math991e 0:18d442efc99a 93 if(toDb){
math991e 3:372e67c123c3 94 return this->convertToDb(average);
math991e 0:18d442efc99a 95 }else{
math991e 3:372e67c123c3 96 return average;
math991e 0:18d442efc99a 97 }
math991e 0:18d442efc99a 98 }