Revision 0:ef02694deaa8, committed 2016-02-24

Comitter:

roberthill04

Date:

Wed Feb 24 16:53:45 2016 +0000

Commit message:

Hello

Changed in this revision

diff -r 000000000000 -r ef02694deaa8 All_Sensors.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/All_Sensors.cpp	Wed Feb 24 16:53:45 2016 +0000
@@ -0,0 +1,334 @@
+#include "mbed.h"
+
+#include "PulseSensor.h"        //Needed for HeartBeat
+//#include "AnalogIn.h"
+
+#include "DigitalIn.h"          //Needed for Hall Effect
+
+#include "FXOS8700Q.h"          //Needed for Accelerometer
+#define PI 3.14159265
+
+
+DigitalOut led_red(LED_RED);
+DigitalOut led_green(LED_GREEN);
+DigitalOut led_blue(LED_BLUE);
+DigitalIn sw2(SW2);
+DigitalIn sw3(SW3);
+Serial pc(USBTX, USBRX);
+bool Button_Pressed = true;      //Initialize flag for output on terminal
+///////////////////////////////////////Variables//////////////////////////////////////////////////
+
+///////////////////////////////////////Heart Rate/////////////////////////////////////////////////
+
+AnalogIn Pulse_Signal(A0);        //Initialize analog input for pulse signal(Heart Rate sensor)
+
+///////////////////////////////////////Hall Effect/////////////////////////////////////////////////
+
+DigitalIn HallEffect(D2);        //Intializes Digital input into pin D2 (Hall Effect sensor)
+int Hall_Counter = 0;            //Initialize Counter for Hall Effect
+bool Low_Hall = true;            //Initialize Flag for Hall Effect sensor
+Timer Hall_Timer;                //Initialize timer for pedal speed calc
+int Pedal_Time;                  //Intialize int for Time Passed 
+int Pedal_Speed;                 //Initialize int for Pedal Speed
+
+////////////////////////////////////////Accelerometer////////////////////////////////////////////////
+
+I2C i2c(PTE25, PTE24);                                      //Initialize I2C connection for sensor
+FXOS8700QAccelerometer acc(i2c, FXOS8700CQ_SLAVE_ADDR1);    // Configured for the FRDM-K64F with onboard sensors
+double angleX, denomX_T, denomX_A, denomX_B, denomX_C;      //intializing variable to hold the angle calculation 
+double angleY, denomY_T, denomY_A, denomY_B, denomY_C;      //and denominator pieces of algorithm for both X&Y axis
+
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////Heart Rate Processing Section////////////////////////////////////////////////////////
+PulseSensor::PulseSensor(PinName analogPin, void (*printDataCallback)(char,int), int callbackRateMs)
+{
+    _started = false;
+    
+    _pAin = new AnalogIn(analogPin);
+    
+    _callbackRateMs = callbackRateMs;
+    
+    _printDataCallback = printDataCallback;
+}
+ 
+ 
+PulseSensor::~PulseSensor()
+{
+    delete _pAin;
+}
+ 
+ 
+void PulseSensor::process_data_ticker_callback(void)
+{
+    _printDataCallback('S', Signal);        // send Processing the raw Pulse Sensor data
+    if (QS == true) {                       // Quantified Self flag is true when a heartbeat is found
+        //fadeRate = 255;                  // Set 'fadeRate' Variable to 255 to fade LED with pulse
+        _printDataCallback('B',BPM);        // send heart rate with a 'B' prefix
+        _printDataCallback('Q',IBI);        // send time between beats with a 'Q' prefix
+        QS = false;                         // reset the Quantified Self flag for next time
+    }
+}
+ 
+ 
+void PulseSensor::sensor_ticker_callback(void)
+{
+    Signal = 1023 * _pAin->read();              // read the Pulse Sensor
+    
+    
+    sampleCounter += 2;                         // keep track of the time in mS with this variable
+    int N = sampleCounter - lastBeatTime;       // monitor the time since the last beat to avoid noise
+ 
+    //  find the peak and trough of the pulse wave
+    if(Signal < thresh && N > (IBI/5)*3) {      // avoid dichrotic noise by waiting 3/5 of last IBI
+        if (Signal < T) {                       // T is the trough
+            T = Signal;                         // keep track of lowest point in pulse wave
+        }
+    }
+ 
+    if(Signal > thresh && Signal > P) {         // thresh condition helps avoid noise
+        P = Signal;                             // P is the peak
+    }                                        // keep track of highest point in pulse wave
+ 
+    //  NOW IT'S TIME TO LOOK FOR THE HEART BEAT
+    // signal surges up in value every time there is a pulse
+    if (N > 250) {                                  // avoid high frequency noise by waiting 
+                                                    //this also sets limit to HR sensor to max =240 BPMs
+        if ( (Signal > thresh) && (Pulse == false) && (N > (IBI/5)*3) ) {
+            Pulse = true;                               // set the Pulse flag when we think there is a pulse
+            //digitalWrite(blinkPin,HIGH);                // turn on pin 13 LED
+            IBI = sampleCounter - lastBeatTime;         // measure time between beats in mS
+            lastBeatTime = sampleCounter;               // keep track of time for next pulse
+ 
+            if(firstBeat) {                        // if it's the first time we found a beat, if firstBeat == TRUE
+                firstBeat = false;                 // clear firstBeat flag
+                return;                            // IBI value is unreliable so discard it
+            }
+            if(secondBeat) {                       // if this is the second beat, if secondBeat == TRUE
+                secondBeat = false;                 // clear secondBeat flag
+                for(int i=0; i<=9; i++) {        // seed the running total to get a realisitic BPM at startup
+                    rate[i] = IBI;
+                }
+            }
+ 
+            // keep a running total of the last 10 IBI values
+            long runningTotal = 0;                   // clear the runningTotal variable
+ 
+            for(int i=0; i<=8; i++) {               // shift data in the rate array
+                rate[i] = rate[i+1];                // and drop the oldest IBI value
+                runningTotal += rate[i];            // add up the 9 oldest IBI values
+            }
+ 
+            rate[9] = IBI;                          // add the latest IBI to the rate array
+            runningTotal += rate[9];                // add the latest IBI to runningTotal
+            runningTotal /= 10;                     // average the last 10 IBI values
+            BPM = 60000/runningTotal;               // how many beats can fit into a minute? that's BPM!
+            QS = true;                              // set Quantified Self flag
+            // QS FLAG IS NOT CLEARED INSIDE THIS ISR
+        }
+    }
+ 
+    if (Signal < thresh && Pulse == true) {    // when the values are going down, the beat is over
+        Pulse = false;                         // reset the Pulse flag so we can do it again
+        amp = P - T;                           // get amplitude of the pulse wave
+        thresh = amp/2 + T;                    // set thresh at 50% of the amplitude
+        P = thresh;                            // reset these for next time
+        T = thresh;
+    }
+ 
+    if (N > 2500) {                            // if 2.5 seconds go by without a beat
+        thresh = 512;                          // set thresh default
+        P = 512;                               // set P default
+        T = 512;                               // set T default
+        lastBeatTime = sampleCounter;          // bring the lastBeatTime up to date
+        firstBeat = true;                      // set these to avoid noise
+        secondBeat = true;                     // when we get the heartbeat back
+    }
+}
+
+void sendDataToProcessing(char symbol, int data)
+{
+    pc.printf("%c%d\t\r\n", symbol, data);
+}
+
+bool PulseSensor::start()
+{
+    if (_started == false)
+    {
+        sampleCounter = 0;
+        lastBeatTime = 0;
+        P =512;
+        T = 512;
+        thresh = 512;
+        amp = 100;
+        firstBeat = true;
+        secondBeat = true;
+        
+        BPM=0;
+        Signal=0;
+        IBI = 600;
+        Pulse = false;
+        QS = false;
+        
+        _pulseSensorTicker.attach(this, &PulseSensor::sensor_ticker_callback, ((float)_sensorTickRateMs/1000));
+        _processDataTicker.attach(this, &PulseSensor::process_data_ticker_callback,  ((float)_callbackRateMs/1000));
+        _started = true;
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+ 
+bool PulseSensor::stop()
+{
+    if(_started == true)
+    {
+        _pulseSensorTicker.detach();
+        _processDataTicker.detach();
+        _started = false;
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+////////////////////////////////////////////////////////End of Heart Rate Processing section//////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////Hall Effect Processing section/////////////////////////////////////////////////////
+
+void Hall_Effect_Count(void)
+{
+    Hall_Timer.stop();                                                              //stop the timer
+    Pedal_Time=Hall_Timer.read()/60;                                                //Divides Time in seconds by 60 so we have minutes for Pedal_Speed (RPM)
+    Pedal_Speed=Hall_Counter/(Hall_Timer.read()/60);                                //Calculates pedal speed in units of RPM
+    
+    //Hall_Timer.reset();                         //idea here is the timer is reset after the program outputs the pedal speed so the demo can be reran
+    
+}
+
+void RPM (void)
+{
+        Button_Pressed = true;                                      
+         
+        if(HallEffect==0 && Low_Hall==true) {                                           //If Hall Effect Digital Output is low 
+            Hall_Counter++;                                                              //Add one to counter for calc pedal speed
+            led_green = 0;                                                               //Output Green on LED, simulates wheel rotation "sensed"
+            led_red = 1;                                                                 
+            led_blue = 1;
+            Low_Hall = false;                                                            //flag to avoid errors                        
+        }
+        else if(HallEffect==1 && Low_Hall==true){                                //Additional logic for accurate readings 
+            led_green = 1;
+            led_red = 0;                                                         //Stays red while hall effect outputs digital high
+            led_blue = 1;
+        }
+        else if(HallEffect==0 && Low_Hall==false){                                                       
+            led_green = 0;
+            led_red = 1; 
+            led_blue = 1;
+            
+        }
+        else if(HallEffect==1 && Low_Hall==false){
+            led_green = 1;
+            led_red = 0;
+            led_blue = 1;
+            Low_Hall = true;
+        }
+         
+        
+}
+////////////////////////////////////////////////////////End of Hall Effect Processing section//////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////Inclinometer Processing section//////////////////////////////////////////////////////////////////////////////////
+    /*
+        In order to calculate angle from accel data use the following algorithm:
+        Ax = arctan( rawX/sqrt(rawY^2 + rawZ^2))
+        Ay = arctan( rawY/sqrt(rawX^2 + rawZ^2))
+        using Ax as an example:
+        we have denom_T = the total denominator = (sqrt(rawY^2 + rawZ^2 )
+        denom_A = rawY^2 && denom_B = rawZ^2 && denom_C = denom_A + denom_B
+        we may only be concerned with one of these angles for our application
+        also note value is output in radians will need to convert to degrees using: 180/PI
+        
+        example of how to use inverse tangent function :    
+        
+        int main ()
+        {
+            double param, result;
+            param = 1.0;
+            result = atan (param) * 180 / PI;
+            printf ("The arc tangent of %f is %f degrees\n", param, result );
+            return 0;
+         }
+        */
+        
+        /*
+            Example of pow: 7 ^ 3 would be written as pow(7.0, 3.0);
+            we can use this find squareroots by making the power exponent = 0.5
+        */
+    void Y_AXIS(void)
+    {
+        
+        float faX, faY, faZ;                            //intialize float variables for incoming raw sensor values
+        acc.getX(faX);                                  //get raw accelerometer data in the X axis
+        acc.getY(faY);                                  //"" Y axis
+        acc.getZ(faZ);                                  //"" Z axis
+        denomY_A = pow(faX, 2);
+        denomY_B = pow(faZ, 2);
+        denomY_C = denomY_A + denomY_B;
+        denomY_T = pow(denomY_C, .5);                   //pow returns base raised to the power exponent 
+        
+        angleY = atan(faY/denomY_T) * 180/PI;           //should calculate the angle on the Y axis in degrees based on raw data 
+    }
+////////////////////////////////////////////////////////End of Inclinometer Processing section//////////////////////////////////////////////////////////////////////////////////
+
+int main() 
+{
+    led_blue =  1;                                       //LED Off
+    led_green = 1;
+    led_red =   1;
+    pc.baud(9600);
+    pc.printf("Hello World from FRDM-K64F board. This is the Cycle Fit Sensor Demo Program. \t \r\n");
+    pc.printf("This program calcualtes and outputs: Heart Rate(in BPM), Pedal Speed(in RPM), and the Angle of incline(in degrees) Press Button SW2 to see fitness metrics.\t \r\n");
+   
+    
+    PulseSensor Pulse_Signal(A0, sendDataToProcessing);         //Intializes Pulse_Signal to A0 for HR
+    Pulse_Signal.start();                                       //Start collecting data from sensor
+    
+    Hall_Timer.start();                                         //Starts Timer for Pedal Speed Calculation
+     
+    acc.enable();                                               //enables Accel sensor so it can collect data
+    
+    
+    
+   while(1)     //NEED TO RUN THOUGH ALL BUTTON PRESS LOGIC FOR COMBINED PROGRAM************************
+   {
+        Button_Pressed = true; 
+        RPM();                                  //function that finds pedal speed through H.E. sensor
+        Y_AXIS();                               //function that finds incline angle through Accel sensor
+        if (sw2==0 && Button_Pressed == true)
+        {
+            Pulse_Signal.stop();                                                         //stops the continuous signal (do i need to stop the signal?)
+            pc.printf("Current Heart Rate is: %d BPM\t \r\n", Pulse_Signal.BPM);         //Outputs Heart Rate
+            
+            Hall_Effect_Count();                                                         //function for calculating pedal speed
+            //Hall_Timer.start();                                                          //restart Hall Effect Timer
+            pc.printf("Approximate pedal speed: %d RPM\t \r\n", Pedal_Speed);            //Outputs Pedal Speed
+             
+            printf("Approximate angle in the Y-Axis =%f degrees\t \r\n", angleY);        //Outputs Inclination Angle in Y axis
+            puts("");    //clears a line under output
+            
+            //Pulse_Signal.start();
+            //Button_Pressed= false; 
+            //wait(0.5);
+        }
+        else if (sw3==0 && Button_Pressed == true)
+        { 
+            Pulse_Signal.start();
+            Hall_Timer.start();
+        }
+   } 
+}

diff -r 000000000000 -r ef02694deaa8 FXOS8700Q.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FXOS8700Q.lib	Wed Feb 24 16:53:45 2016 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/teams/Freescale/code/FXOS8700Q/#aee7dea904e2

diff -r 000000000000 -r ef02694deaa8 PulseSensor.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PulseSensor.h	Wed Feb 24 16:53:45 2016 +0000
@@ -0,0 +1,75 @@
+#ifndef PULSE_SENSOR_H
+#define PULSE_SENSOR_H
+ 
+#include "mbed.h"
+ 
+ 
+/**
+ * Class for interfacing with a http://pulsesensor.myshopify.com/ 'Pulse Sensor Amped'.
+ * The contents of this class are based on the "Pulse Sensor Amped 1.1" Arduino Sketch.
+ *
+ * When using this class for the first time, it is recommended that you use the Processing 
+ * GUI app available http://pulsesensor.myshopify.com/pages/code-and-guide. Using this, you
+ * will easily be able to verify the operating of your sensor, and the integration of this
+ * class into your mbed project. 
+ * WEBSITE is incorrect^^^
+ **/
+ 
+class PulseSensor
+{
+    private:
+        volatile int rate[10];                          // used to hold last ten IBI values
+        volatile unsigned long sampleCounter;          // used to determine pulse timing
+        volatile unsigned long lastBeatTime;           // used to find the inter beat interval
+        volatile int P;                                // used to find peak in pulse wave
+        volatile int T;                     // used to find trough in pulse wave
+        volatile int thresh;                // used to find instant moment of heart beat
+        volatile int amp;                   // used to hold amplitude of pulse waveform
+        volatile bool firstBeat;        // used to seed rate array so we startup with reasonable BPM
+        volatile bool secondBeat;       // used to seed rate array so we startup with reasonable BPM
+        
+        // these variables are volatile because they are used during the interrupt service routine!
+        
+        volatile int Signal;                // holds the incoming raw data
+        volatile int IBI;             // holds the time between beats, the Inter-Beat Interval
+        volatile bool Pulse;        // true when pulse wave is high, false when it's low
+        volatile bool QS;           // becomes true when a beat is found
+    
+    
+        void (*_printDataCallback)(char,int);
+        static const int _sensorTickRateMs = 2;
+        int       _callbackRateMs;
+        bool      _started;
+        
+        AnalogIn *_pAin;
+        Ticker    _pulseSensorTicker;
+        Ticker    _processDataTicker;
+        
+        void sensor_ticker_callback(void);
+        void process_data_ticker_callback(void);
+    
+    public:
+    
+         volatile int BPM;                   // used to hold the pulse rate
+        /** PulseSensor Constructor - Note this does not start the reading of the sensor.
+         * @param   analogPin Name of the analog pin that the sensor is connected to.
+         * @param   printDataCallback Pointer to function which will be called to print the latest data. Output format available here: http://pulsesensor.myshopify.com/pages/code-and-guide
+         * @param   callbackRateMs Rate at which the printDataCallback is to be called, recommended is 20ms for graphing of pulse signal.
+         */
+        PulseSensor(PinName analogPin, void (*printDataCallback)(char,int), int callbackRateMs=20);
+        
+        /** Destructor */
+        ~PulseSensor();
+        
+        /** Start reading the Pulse Sensor, and sending current readings to the print data callback.
+         * @returns true if reading of the sensor is started, false if reading was aleady in progress.
+         */
+        bool start();
+        
+        /** Stops the current reading of the Pulse Senson.
+         * @return true if reading is stopped, false if reading was already stopped.
+         */
+        bool stop();
+};
+ 
+#endif
\ No newline at end of file

diff -r 000000000000 -r ef02694deaa8 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Feb 24 16:53:45 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/252557024ec3
\ No newline at end of file