unsafe void UpdateHeartRate(NSData hr)
{
var now = DateTime.Now;
var data = (byte *)hr.Bytes;
ushort bpm = 0;
if ((data [0] & 0x01) == 0)
{
bpm = data [1];
}
else
{
bpm = (ushort)data [1];
bpm = (ushort)(((bpm >> 8) & 0xFF) | ((bpm << 8) & 0xFF00));
}
PreviousHeartBeat = CurrentHeartBeat;
CurrentHeartBeat = new HeartBeat {
Time = now, Rate = bpm
};
OnHeartRateUpdated();
if (PreviousHeartBeat.Rate == 0 && CurrentHeartBeat.Rate != 0)
{
OnHeartBeat();
ScheduleBeatTimer();
}
}
/* to use the unsafe version of this method,
* 'tick' **Project > Options > Build > General > Allow 'unsafe' code** */
/*unsafe*/ void UpdateHeartRate(NSData hr)
{
var now = DateTime.Now;
// unsafe line
// var data = (byte *)hr.Bytes;
// replaced by safe lines
byte[] data = new byte[hr.Length];
System.Runtime.InteropServices.Marshal.Copy(hr.Bytes, data, 0, Convert.ToInt32(hr.Length));
// end safe lines
ushort bpm = 0;
if ((data [0] & 0x01) == 0)
{
bpm = data [1];
}
else
{
bpm = (ushort)data [1];
bpm = (ushort)(((bpm >> 8) & 0xFF) | ((bpm << 8) & 0xFF00));
}
PreviousHeartBeat = CurrentHeartBeat;
CurrentHeartBeat = new HeartBeat {
Time = now, Rate = bpm
};
OnHeartRateUpdated();
if (PreviousHeartBeat.Rate == 0 && CurrentHeartBeat.Rate != 0)
{
OnHeartBeat();
ScheduleBeatTimer();
}
}
public HeartBeatEventArgs (HeartBeat previous, HeartBeat current)
{
PreviousHeartBeat = previous;
CurrentHeartBeat = current;
}
unsafe void UpdateHeartRate (NSData hr)
{
var now = DateTime.Now;
var data = (byte *)hr.Bytes;
ushort bpm = 0;
if ((data [0] & 0x01) == 0) {
bpm = data [1];
} else {
bpm = (ushort)data [1];
bpm = (ushort)(((bpm >> 8) & 0xFF) | ((bpm << 8) & 0xFF00));
}
PreviousHeartBeat = CurrentHeartBeat;
CurrentHeartBeat = new HeartBeat { Time = now, Rate = bpm };
OnHeartRateUpdated ();
if (PreviousHeartBeat.Rate == 0 && CurrentHeartBeat.Rate != 0) {
OnHeartBeat ();
ScheduleBeatTimer ();
}
}
/* to use the unsafe version of this method,
* 'tick' **Project > Options > Build > General > Allow 'unsafe' code** */
/*unsafe*/ void UpdateHeartRate (NSData hr)
{
var now = DateTime.Now;
// unsafe line
// var data = (byte *)hr.Bytes;
// replaced by safe lines
byte[] data = new byte[hr.Length];
System.Runtime.InteropServices.Marshal.Copy(hr.Bytes, data, 0, Convert.ToInt32(hr.Length));
// end safe lines
ushort bpm = 0;
if ((data [0] & 0x01) == 0) {
bpm = data [1];
} else {
bpm = (ushort)data [1];
bpm = (ushort)(((bpm >> 8) & 0xFF) | ((bpm << 8) & 0xFF00));
}
PreviousHeartBeat = CurrentHeartBeat;
CurrentHeartBeat = new HeartBeat { Time = now, Rate = bpm };
OnHeartRateUpdated ();
if (PreviousHeartBeat.Rate == 0 && CurrentHeartBeat.Rate != 0) {
OnHeartBeat ();
ScheduleBeatTimer ();
}
}
public HeartBeatEventArgs(HeartBeat previous, HeartBeat current)
{
PreviousHeartBeat = previous;
CurrentHeartBeat = current;
}
protected virtual void OnHeartBeat() => HeartBeat?.Invoke(this, EventArgs.Empty);
