RC_Channel.h

00001 #ifndef RC_CHANNEL_H
00002 #define RC_CHANNEL_H
00003 
00004 #include "mbed.h"
00005 
00006 class RC_Channel
00007 {
00008     public:
00009         RC_Channel(PinName mypin, int index); // NO p19/p20!!!!, they don't support InterruptIn
00010         int read(); // read the last measured data
00011        
00012     private:
00013         int index; // to know which channel of the RC an instance has (only for calibrations savings)
00014         int time; // last measurement data
00015         float scale; // calibration values
00016         float offset;
00017         
00018         InterruptIn myinterrupt; // interrupt on the pin to react when signal falls or rises
00019         void rise(); // start the time measurement when signal rises
00020         void fall(); // stop the time mesurement and save the value when signal falls
00021         Timer timer; // timer to measure the up time of the signal and if the signal timed out
00022         
00023         Ticker timeoutchecker; // Ticker to see if signal broke down
00024         void timeoutcheck(); // to check for timeout, checked every second
00025         
00026         // Calibration value saving
00027         void saveCalibrationValue(float * value, char * fileextension);
00028         void loadCalibrationValue(float * value, char * fileextension);
00029 };
00030 
00031 #endif