ReceiverIR.h

00001 /**
00002  * IR receiver (Version 0.0.4)
00003  *
00004  * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems)
00005  * http://shinta.main.jp/
00006  */
00007 
00008 #ifndef _RECEIVER_IR_H_
00009 #define _RECEIVER_IR_H_
00010 
00011 #include <mbed.h>
00012 
00013 #include "RemoteIR.h"
00014 
00015 /**
00016  * IR receiver class.
00017  */
00018 class ReceiverIR {
00019 public:
00020 
00021     /**
00022      * Constructor.
00023      *
00024      * @param rxpin Pin for receive IR signal.
00025      */
00026     explicit ReceiverIR(PinName rxpin, bool rxInversion = false);
00027     bool RxInversion;
00028     
00029     /**
00030      * Destructor.
00031      */
00032     ~ReceiverIR();
00033 
00034     /**
00035      * State.
00036      */
00037     typedef enum {
00038         Idle,
00039         Receiving,
00040         Received
00041     } State;
00042     
00043     /**
00044      * Get state.
00045      *
00046      * @return Current state.
00047      */
00048     State getState();
00049     
00050     /**
00051      * Get data.
00052      *
00053      * @param format Pointer to format.
00054      * @param buf Buffer of a data.
00055      * @param bitlength Bit length of the buffer.
00056      *
00057      * @return Data bit length.
00058      */
00059     int getData(RemoteIR::Format *format, uint8_t *buf, int bitlength);
00060     
00061 private:
00062     
00063     typedef struct {
00064         RemoteIR::Format format;
00065         int bitcount;
00066         uint8_t buffer[64];
00067     } data_t;
00068     
00069     typedef struct {
00070         State state;
00071         int c1;
00072         int c2;
00073         int c3;
00074         int d1;
00075         int d2;
00076     } work_t;
00077 
00078     InterruptIn evt;    /**< Interrupt based input for input. */
00079     Timer timer;        /**< Timer for WDT. */
00080     Ticker ticker;      /**< Tciker for tick. */
00081     Timeout timeout;    /**< Timeout for tail. */
00082 
00083     data_t data;
00084     work_t work;
00085     
00086     void init_state(void);
00087 
00088     void isr_wdt(void);
00089     void isr_fall(void);
00090     void isr_rise(void);
00091     
00092     /**
00093      * ISR timeout for tail detection.
00094      */
00095     void isr_timeout(void);
00096 
00097 };
00098 
00099 #endif