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  * 130616 suupen
00009  * IRC Helicopter "SWIFT" Propo support
00010  *  Conditional compilation 
00011  *      "SWIFT_PROTCOL"
00012  *      "IR_RAW_DATA_ANALYSIS"
00013  *--------------------------------------------------------
00014  */
00015 
00016 #ifndef _RECEIVER_IR_H_
00017 #define _RECEIVER_IR_H_
00018 
00019 #include <mbed.h>
00020 
00021 #include "RemoteIR.h"
00022 
00023 //#define IR_RAW_DATA_ANALYSIS
00024 
00025 /**
00026  * IR receiver class.
00027  */
00028 class ReceiverIR {
00029 public:
00030 
00031     /**
00032      * Constructor.
00033      *
00034      * @param rxpin Pin for receive IR signal.
00035      */
00036     explicit ReceiverIR(PinName rxpin);
00037     
00038     /**
00039      * Destructor.
00040      */
00041     ~ReceiverIR();
00042 
00043     /**
00044      * State.
00045      */
00046     typedef enum {
00047         Idle,
00048         Receiving,
00049         Received
00050     } State;
00051     
00052     /**
00053      * Get state.
00054      *
00055      * @return Current state.
00056      */
00057     State getState();
00058     
00059     /**
00060      * Get data.
00061      *
00062      * @param format Pointer to format.
00063      * @param buf Buffer of a data.
00064      * @param bitlength Bit length of the buffer.
00065      *
00066      * @return Data bit length.
00067      */
00068     int getData(RemoteIR::Format *format, uint8_t *buf, int bitlength);
00069     
00070 private:
00071     
00072     typedef struct {
00073         RemoteIR::Format format;
00074         int bitcount;
00075         uint8_t buffer[64];
00076     } data_t;
00077     
00078     typedef struct {
00079         State state;
00080         int c1;
00081         int c2;
00082         int c3;
00083         int d1;
00084         int d2;
00085     } work_t;
00086     
00087  #ifdef IR_RAW_DATA_ANALYSIS
00088     typedef struct {
00089         State state;
00090         int timecount[1000];   // Hi,Lo count (1/1 [us]/count)
00091         int bitcount;
00092     } check_t;
00093 #endif //IR_RAW_DATA_ANALYSIS
00094 
00095     InterruptIn evt;    /**< Interrupt based input for input. */
00096     Timer timer;        /**< Timer for WDT. */
00097     Ticker ticker;      /**< Tciker for tick. */
00098     Timeout timeout;    /**< Timeout for tail. */
00099 
00100     data_t data;
00101     work_t work;
00102  #ifdef IR_RAW_DATA_ANALYSIS
00103     check_t check;
00104 #endif //IR_RAW_DATA_ANALYSIS
00105    
00106     void init_state(void);
00107 
00108     void isr_wdt(void);
00109     void isr_fall(void);
00110     void isr_rise(void);
00111     
00112     /**
00113      * ISR timeout for tail detection.
00114      */
00115     void isr_timeout(void);
00116 
00117 };
00118 
00119 #endif
00120