ButtonController.h

00001 #ifndef _BUTTON_CONTROLLER_
00002 #define _BUTTON_CONTROLLER_
00003 
00004 #include "mbed.h"
00005 #include "rtos.h"
00006 #include "mcp23s08.h"
00007 #include "Menu.h"
00008 #include "Navigator.h"
00009 
00010 /**
00011  * service to manage the external GPIO expander board.
00012  */
00013 typedef enum
00014 {
00015     NO_BUTTON    = 27,
00016     BUTTON_UP    = 26,
00017     BUTTON_DOWN  = 25,
00018     BUTTON_MODE  = 19,
00019     BUTTON_SET   = 11,
00020     BUTTON_CLEAR = 0
00021 } tButtonValue ;
00022 
00023 typedef void (*t_ButtonPressCallback)(void);
00024 
00025 
00026 /***
00027 *
00028 * This class wrapps the communication with the GPIO expander over SPI bus.
00029 *  PIN 0 : Up
00030 *  PIN 1 : Down
00031 *  PIN 2 : Clear
00032 *  PIN 3 : Mode
00033 *  PIN 4 : Set
00034 *  PIN 5 : Enable Audio
00035 *  PIN 6 : na
00036 *  PIN 7 : na 
00037 *  
00038 *  MASK = 0x1F;
00039 *  
00040 */
00041 class ButtonController 
00042 {
00043     public :
00044         
00045         Navigator *     navigator;
00046         mcp23s08 *      spi_io_exp;
00047         Mutex           _mutex;
00048         unsigned char   currentValue;
00049         unsigned char   prevValue;
00050         unsigned char   confirmedValue;
00051         unsigned int    countsSinceChange;
00052         unsigned char   isServiced;
00053         unsigned char   isHeld;
00054         
00055         
00056         CircularBuffer<uint8_t, 64> cmd_queue;
00057         
00058         ButtonController(Navigator * navigator);
00059         ~ButtonController();
00060         
00061         void  pressButtonUp(void);
00062         void  pressButtonDown(void);
00063         void  pressButtonClear(void);
00064         void  pressButtonMode(void);
00065         void  pressButtonSet(void);
00066         void  releaseButton(void);
00067         
00068         void init(void);
00069         void update(void);
00070         void update(Navigator * navigator);
00071         void update(Menu * menu);
00072         void update(int currentValue, Menu * menu);
00073         
00074         uint8_t getCurrentState ();
00075 };
00076 
00077 
00078 #endif