Author Topic: pulse sensor amped with RFduino doesn't work  (Read 2972 times)

alessiomariucci

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pulse sensor amped with RFduino doesn't work
« on: February 16, 2015, 05:06:00 AM »
hello, my name is alessio and  i'm italian. I have got a problem with "RFduino" and the "pulse sensor amped"  ( heart rate) .
I downloaded the library of the sensor in the official site but when I compile the code, the ide of the arduino detects errors of  incompatibility with the sensor and the Arduino example sketch.

interrupt :

Code: [Select]
volatile int rate[10];                    // array to hold last ten IBI values
volatile unsigned long sampleCounter = 0;          // used to determine pulse timing
volatile unsigned long lastBeatTime = 0;           // used to find IBI
volatile int P =512;                      // used to find peak in pulse wave, seeded
volatile int T = 512;                     // used to find trough in pulse wave, seeded
volatile int thresh = 512;                // used to find instant moment of heart beat, seeded
volatile int amp = 100;                   // used to hold amplitude of pulse waveform, seeded
volatile boolean firstBeat = true;        // used to seed rate array so we startup with reasonable BPM
volatile boolean secondBeat = false;      // used to seed rate array so we startup with reasonable BPM


void interruptSetup(){     
  TCCR1A = 0x00;
TCCR1B = 0x0C; // prescaler = 256
OCR1A = 0x7C; // count to 124
TIMSK1 = 0x02;
sei();
}


// THIS IS THE TIMER 2 INTERRUPT SERVICE ROUTINE.
// Timer 2 makes sure that we take a reading every 2 miliseconds
ISR(TIMER2_COMPA_vect){                         // triggered when Timer2 counts to 124
  cli();                                      // disable interrupts while we do this
  Signal = analogRead(pin_viola_sensore);              // 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
    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(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;                     
        }
      }

      if(firstBeat){                         // if it's the first time we found a beat, if firstBeat == TRUE
        firstBeat = false;                   // clear firstBeat flag
        secondBeat = true;                   // set the second beat flag
        sei();                               // enable interrupts again
        return;                              // IBI value is unreliable so discard it
      }   


      // keep a running total of the last 10 IBI values
      word 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
    digitalWrite(blinkPin,LOW);            // turn off pin 13 LED
    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 = false;                    // when we get the heartbeat back
  }

  sei();                                   // enable interrupts when youre done!
}// end isr

 the error is caused surely the interrupt routine but I can not solve the problem since I do not know the code to replace all ' internal program.
the error the error  printed is :
_____________________________

Interrupt.ino: In function 'void interruptSetup()':

Interrupt.ino:16:3: error: 'TCCR1A' was not declared in this scope

Interrupt.ino:17:1: error: 'TCCR1B' was not declared in this scope

Interrupt.ino:18:1: error: 'OCR1A' was not declared in this scope

Interrupt.ino:19:1: error: 'TIMSK1' was not declared in this scope

Interrupt.ino:20:5: error: 'sei' was not declared in this scope

Interrupt.ino: At global scope:

Interrupt.ino:26:4: error: expected constructor, destructor, or type conversion before '(' token
______________________

I think that the code is not compatible with RFduino but only with arduino but I would make it compatible with it . I do not know what to change to code of internal setup interrupt.
I thank everyone in advance for the help  ;D


tolson

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Re: pulse sensor amped with RFduino doesn't work
« Reply #1 on: February 21, 2015, 09:51:14 AM »
You are right. The project you are working with was designed specifically for the Atmel AVR parts. Not ARM. You will have to do some work to adapt it.
« Last Edit: February 21, 2015, 09:53:21 AM by tolson »

Angel

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Re: pulse sensor amped with RFduino doesn't work
« Reply #2 on: May 31, 2015, 07:41:17 AM »
Hi,
I'm also trying to connect pulse sensor with rfduino board.
I trying change the interrupt sketch from arduino to rdfuino, but I don't understand how I can do.
Someone have connected this two device?

thx

bsiever

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Re: pulse sensor amped with RFduino doesn't work
« Reply #3 on: April 26, 2016, 05:06:59 AM »
This is very late, but I've made a driver to use the Pulse Sensor Amped with the Simblee.  (Since the Simblee and RFduino are based on the same chip, it make work with the RFduino too). 

I've posted it on GitHub:  https://github.com/bsiever/Simblee-PulseSensorAmped.

  Bill

berta720

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Re: pulse sensor amped with RFduino doesn't work
« Reply #4 on: April 28, 2016, 03:08:35 PM »
I have the same problem.

I saw this https://github.com/myclasp/PulseSensor_Amped_RFDuino

I will try and post the development

Regards


berta720

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Re: pulse sensor amped with RFduino doesn't work
« Reply #5 on: May 02, 2016, 10:32:12 AM »
Update.

The code works straight forward.

The sensor donĀ“t work very well, depend on the zone of your body that you are reading of. So far the neck gave the most accurate readings.

Regards

 

anything