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);
00027     
00028     /**
00029      * Destructor.
00030      */
00031     ~ReceiverIR();
00032 
00033     /**
00034      * State.
00035      */
00036     typedef enum {
00037         Idle,
00038         Receiving,
00039         Received
00040     } State;
00041     
00042     /**
00043      * Get state.
00044      *
00045      * @return Current state.
00046      */
00047     State getState();
00048     
00049     /**
00050      * Get data.
00051      *
00052      * @param format Pointer to format.
00053      * @param buf Buffer of a data.
00054      * @param bitlength Bit length of the buffer.
00055      *
00056      * @return Data bit length.
00057      */
00058     int getData(RemoteIR::Format *format, uint8_t *buf, int bitlength);
00059     
00060 private:
00061     
00062     typedef struct {
00063         RemoteIR::Format format;
00064         int bitcount;
00065         uint8_t buffer[64];
00066     } data_t;
00067     
00068     typedef struct {
00069         State state;
00070         int c1;
00071         int c2;
00072         int c3;
00073         int d1;
00074         int d2;
00075     } work_t;
00076 
00077     InterruptIn evt;    /**< Interrupt based input for input. */
00078     Timer timer;        /**< Timer for WDT. */
00079     Ticker ticker;      /**< Tciker for tick. */
00080     Timeout timeout;    /**< Timeout for tail. */
00081 
00082     data_t data;
00083     work_t work;
00084     
00085     void init_state(void);
00086 
00087     void isr_wdt(void);
00088     void isr_fall(void);
00089     void isr_rise(void);
00090     
00091     /**
00092      * ISR timeout for tail detection.
00093      */
00094     void isr_timeout(void);
00095 
00096 };
00097 
00098 #endif