Diff: Ppm.h

Revision:

2:b67f18c84c05

Child:

3:d13b9e50312f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Ppm.h	Wed Mar 04 18:49:31 2015 +0000
@@ -0,0 +1,56 @@
+#include "mbed.h"
+
+#ifndef Ppm_H
+#define Ppm_H
+
+class Ppm
+{
+    public:
+        //Constructor
+        Ppm(PinName pin, float minimumOutput, float maximumOutput, int minimumPulseTime, int maximumPulseTime, int numberOfChannels, int throttleChannel);
+        
+    private:
+        //Interrupt
+        void SignalRise();
+        
+        //Interrupt pin
+        InterruptIn *_ppmPin;
+        
+        //Timer, times length of pulses
+        Timer _timer;
+        //Number of channels in Ppm signal
+        int _numberOfChannels;
+        //Current channel
+        char _currentChannel;  
+        //Stores channel times
+        int _times[100];
+        //Stores most recent complete frame times
+        int _completeTimes[100];
+        //Keeps track of time between Ppm interrupts
+        int _timeElapsed; 
+        //Minimum time of frame
+        int _minFrameTime;
+        //If the pulse time for a channel is this short, something is wrong uS
+        int _shortTime;
+        //Minimum pulse time uS
+        int _minimumPulseTime;
+        //Maximum pulse time uS
+        int _maximumPulseTime;
+        //Minimum output
+        float _minimumOutput;
+        //Maximum output
+        float _maximumOutput;
+        //Throttle channel - used for fail safe
+        int _throttleChannel;
+        
+    public:
+        //Get channel data
+        void GetChannelData(float * channelData);
+        
+    private:
+        float Map(float input, float inputMin, float inputMax, float outputMin, float outputMax);
+};
+
+#endif
+
+