Button Event Checker Code

/****************************************************************************

 Module

   ButtonEventChecker.c

 Revision

   1.0.1

 Description

   This is a template file for implementing a simple service under the

   Gen2 Events and Services Framework.

 Notes

 History

 When           Who What/Why

 -------------- --- --------

 01/16/12 09:58 jec  began conversion from TemplateFSM.c

****************************************************************************/

/*----------------------------- Include Files -----------------------------*/

/* include header files for this state machine as well as any machines at the

   next lower level in the hierarchy that are sub-machines to this machine

*/

#include "ES_Configure.h"

#include "ES_Framework.h"

#include "ButtonEventChecker.h"

#include "GameFSM.h"

#include "ButtonModule.h"

#include "dbprintf.h"

/*----------------------------- Module Defines ----------------------------*/

/*---------------------------- Module Functions ---------------------------*/

/* prototypes for private functions for this service.They should be functions

   relevant to the behavior of this service

*/

/*---------------------------- Module Variables ---------------------------*/

// with the introduction of Gen2, we need a module level Priority variable

static uint32_t LastButtonState;

static uint32_t LastTickCount;

/*------------------------------ Module Code ------------------------------*/

/****************************************************************************

 Function

     InitTemplateService

 Parameters

     uint8_t : the priorty of this service

 Returns

     bool, false if error in initialization, true otherwise

 Description

     Saves away the priority, and does any

     other required initialization for this service

 Notes

 Author

     J. Edward Carryer, 01/16/12, 10:00

****************************************************************************/

void InitButtonEventChecker(void)

{

//Initializes Button Checker

    LastButtonState = PORTBbits.RB2;

    LastTickCount = ES_Timer_GetTime();

}

bool Check4Button(void)

{

bool ReturnVal = false;

uint32_t CurrentButtonState = PORTBbits.RB2;

    ES_Event_t ThisEvent;

//    uint32_t CurrentTickCount = ES_Timer_GetTime();

if(QueryGameFSM() == Wait4Input)

{

     //DB_printf("Checking for Button...\r\n");

     if(CurrentButtonState != LastButtonState)

     {  

         if(CurrentButtonState == 0)

             {

                 DB_printf("Button Down\r\n");

                 ThisEvent.EventType = BUTTON_DOWN;

                    ReturnVal = true;

                 PostButtonModule(ThisEvent);

             }

     }

}

    LastButtonState = CurrentButtonState;

return ReturnVal;

}

/***************************************************************************

 private functions

 ***************************************************************************/

/*------------------------------- Footnotes -------------------------------*/

/*------------------------------ End of file ------------------------------*/