tirrc5.c.svn-base

最新火热的ＣＸ３２ 源代码

 /**
 *  This code and information is part of Trident DPTV API (TDAPI)
 *
 *  Copyright (C) Trident Multimedia Technologies (Shanghai) Co., Ltd.
 *         2002 - 2003  All rights reserved.
 *
 *  This file provides functions for TV or demoboard remote controller.
 *
 *  Revision:
 *  24/08/2004     Fixed bugs by Ivan Wen.
 *  03/04/2004     Modify RC5 part(decode & repeat) by Max and Joy
 *  04/18/2003     Added repeat key support by Archie
 *  08/01/2002     Created by Rick, York, Joy and Archie
 *
 */

#include "tdefs.h"
#include "tio.h"
#include "tutils.h"
#include "tvkey.h"
#include "tRemote.h"
#include "thilevel.h"
#include "ttimer.h"
#include "tvdebug.h"

/*remote flag*/
static Byte s_ucRemoteFlag = 0;

/*the following two global variables are used by remote routines*/
static Void tdRemoteCodeDetect(Byte ucRemoteCode);

static Gdata struct tagRemoteData
{
    Word wRemoteVal;         /*store the value of a code*/
    Byte ucRemoteBit;        /*store the last bit*/
    Byte ucRemoteCount;      /*used to count shift times and generate s_RemoteData.ucRemoteTemp*/
    Byte ucReleaseTimer; 
    Bool bToogleBit : 1;     /*save toogle bit*/ 
    Bool bDetect13Bit : 1;   /*detect 13 bit*/
    Byte ucPreviousCountVal; /*timer count value of last time*/
    Byte ucSystemCode;
    Byte ucRemoteCode;
    Byte ucOffset;
    Byte ucKeyNum;
} s_RemoteData;


static Void tdIRRC51msTimer(Void)
{
    s_RemoteData.ucReleaseTimer++;
    if (t_RemoteData.wCount == t_RemoteData.wFirstDelay)
    {
        tdAddVirtualKey(s_RemoteData.ucRemoteCode);
        t_RemoteData.wCount--;
    } else if (t_RemoteData.wCount) 
    {
        t_RemoteData.wCount--;
        if (tdTestValBitTrue(s_ucRemoteFlag, _RF_RC_LEADERCODE_))
        {  
            if (t_RemoteData.wCount == 0)
            {
                tdAddVirtualKey(s_RemoteData.ucRemoteCode /*| _VK_STATUS_DOWN_*/);
                tdClearValBit(s_ucRemoteFlag, _RF_RC_LEADERCODE_);
                t_RemoteData.wCount = t_RemoteData.wRepeatDelay - 1;
            }
        } 
    }

    /* After receiving the 13th bit, wait 3ms;  */                  
    /* If none another interrupt occurs, invoke the functiton to get the 14th bit(0).*/
    if (s_RemoteData.ucReleaseTimer >= 3 && s_RemoteData.bDetect13Bit)  
    {                                
        tdRemoteCodeDetect(255);                            
    }
}

static Byte tdGetTimeInterval(Byte ucCurrentCountVal)
{
    /* when the INT0 interrupt the timer interrupt service */
    if (!ucCurrentCountVal)
        ucCurrentCountVal = tdLoadInitTimerCount();
        
#ifdef _TIMERCOUNT_DOWN_        
    if (ucCurrentCountVal < s_RemoteData.ucPreviousCountVal)
        ucCurrentCountVal =  s_RemoteData.ucPreviousCountVal - ucCurrentCountVal;
    else
    	ucCurrentCountVal = s_RemoteData.ucPreviousCountVal + tdGetTimerBInterval() - ucCurrentCountVal;
#else
    if (ucCurrentCountVal >= s_RemoteData.ucPreviousCountVal)
        ucCurrentCountVal =  ucCurrentCountVal - s_RemoteData.ucPreviousCountVal;
    else
        ucCurrentCountVal =  ucCurrentCountVal + tdGetTimerBInterval() - s_RemoteData.ucPreviousCountVal;
#endif  
    return ucCurrentCountVal;
}

static Void tdIRRC5Service(Void)
{                      
    IByte ucRemoteCode;
    IByte ucCurrentCountVal;
    
    ucCurrentCountVal =  tdGetTimerBCurrentCount();
    
#ifdef _TIMERCOUNT_DOWN_        
    if(ucCurrentCountVal > tdLoadInitTimerCount()) 
#else
    if(ucCurrentCountVal < tdLoadInitTimerCount()) 
#endif
        ucCurrentCountVal = tdLoadInitTimerCount();
    tdClearInterruptPend();
    ucRemoteCode = tdGetTimeInterval(ucCurrentCountVal);
    
    s_RemoteData.ucPreviousCountVal = ucCurrentCountVal;    
    tdRemoteCodeDetect(ucRemoteCode);    /* Analyse remote key */ 
}

/**
 *    This function translates the pressed remote key code.
 *    When user press on the remote controller, the key code
 *    will store in a global value and let the function RemoteInput()
 *    return key code.
 *    
 *                     
 * @param  ucRemoteCode(I) - the time distance between two pulse
 *                           generated by remote controller
 * @return None 
 * @see    tdRemoteService
 */

static Void tdRemoteCodeDetect(Byte ucRemoteCode)
{
    IByte ucIndex;
    IByte ucRemoteVal;
    IByte ucSystemCode;
    IByte i;
	static Byte s_ucRepeatCnt = 0;
    
    if (s_RemoteData.bDetect13Bit)
    {/* the 14th bit */
        s_RemoteData.bDetect13Bit = _FALSE_;
        tdLeftShift1(s_RemoteData.wRemoteVal);
        if (ucRemoteCode >= pRC5Remote->Remote_1B_Min && ucRemoteCode <= pRC5Remote->Remote_1B_Max)
             s_RemoteData.wRemoteVal |= 1;
         goto lastbit;     
    }

    if (s_RemoteData.ucRemoteCount == 0)
    {  /* first time */
firstbit:
        s_RemoteData.ucRemoteCount = 1;
        s_RemoteData.ucRemoteBit   = 1;
        s_RemoteData.wRemoteVal    = 1;
        s_RemoteData.bDetect13Bit = _FALSE_;
        return;
    } else if ((pRC5Remote->Remote_1B_Min <= ucRemoteCode) && (ucRemoteCode <= pRC5Remote->Remote_1B_Max)) /* 1B time */
    {   /* C(i) = C(i - 1) */
        tdLeftShift1(s_RemoteData.wRemoteVal);
        s_RemoteData.wRemoteVal |= s_RemoteData.ucRemoteBit;
        s_RemoteData.ucRemoteCount++;
    } else if ((pRC5Remote->Remote_15B_Min <= ucRemoteCode) && (ucRemoteCode <= pRC5Remote->Remote_15B_Max)) /* 1.5B time */ 
    {
        tdLeftShift1(s_RemoteData.wRemoteVal);
        if (s_RemoteData.ucRemoteBit == 1)
        {   /* C(i) = 0, C(i+1) = 0 */
            tdLeftShift1(s_RemoteData.wRemoteVal);
            s_RemoteData.ucRemoteBit = 0;
            s_RemoteData.ucRemoteCount += 2;
        } else
        {   /* C(i) = 1 */
            s_RemoteData.wRemoteVal |= 1;
            s_RemoteData.ucRemoteBit = 1;
            s_RemoteData.ucRemoteCount++;
        }
    } else if ((pRC5Remote->Remote_2B_Min <= ucRemoteCode) && (ucRemoteCode <= pRC5Remote->Remote_2B_Max)) /* 2B time */ 
    {     /* C(i) = 0, C(i+1) = 1 */

        tdLeftShift1(s_RemoteData.wRemoteVal);
        tdLeftShift1(s_RemoteData.wRemoteVal);
        s_RemoteData.wRemoteVal |= 1;
        s_RemoteData.ucRemoteBit = 1;
        s_RemoteData.ucRemoteCount += 2;
    } 
    else
    {   /* error */
#ifdef DEBUG_RMT
        tvDebugPrint1("ev=%d\n", ucRemoteCode);
#endif
        goto firstbit;
    }

    if (s_RemoteData.ucRemoteCount == 13)
    {   
        s_RemoteData.ucReleaseTimer = 0;
        if ((Byte)s_RemoteData.wRemoteVal & 0x01) /* second last bit is 1 */
        {
            s_RemoteData.bDetect13Bit = _TRUE_;
            return;
        }
    }

    if (s_RemoteData.ucRemoteCount >= 14)
    {
lastbit:

        /*if the second bit is 1, add 0x80 to expend key number.  */
        ucRemoteVal = ((Byte)s_RemoteData.wRemoteVal & 0x3f) + ((s_RemoteData.wRemoteVal & 0x1000) ? 0x00 : 0x40);
#ifdef DEBUG_RMT
        tvDebugPrint1("rmt val=%x\n", s_RemoteData.wRemoteVal);
#endif
        ucSystemCode = (Byte)(s_RemoteData.wRemoteVal >> 6) & 0x1F;
        if (pRC5Remote->System_Code_Num == 0) /*the protocol hasn't system code*/
        {
            s_RemoteData.ucOffset = pRC5Remote->RemoteKeySet[0].ucKeySetOffset;
            s_RemoteData.ucKeyNum = pRC5Remote->RemoteKeySet[0].ucKeyNum << 1; 
        }
        else
        {
            for (i = 0; i < pRC5Remote->System_Code_Num; i++)
            {
                if (pRC5Remote->RemoteKeySet[i].ucSystemCode == ucSystemCode)
                    break;  
            }
            if (i == pRC5Remote->System_Code_Num)
                goto firstbit;  //error
            else
            {
                s_RemoteData.ucOffset = pRC5Remote->RemoteKeySet[i].ucKeySetOffset;
                s_RemoteData.ucKeyNum = pRC5Remote->RemoteKeySet[i].ucKeyNum << 1;
            }   
        }       
                
        ucIndex = 0;
        
        while ((*((RPByte)pRC5Remote + s_RemoteData.ucOffset + ucIndex) != (Byte)(ucRemoteVal)) && (ucIndex < s_RemoteData.ucKeyNum))
             ucIndex += 2;
             
        if (ucIndex < s_RemoteData.ucKeyNum)
        {
            ucIndex = *((RPByte)pRC5Remote + s_RemoteData.ucOffset + ucIndex + 1);     

            if ((ucIndex == s_RemoteData.ucRemoteCode) && t_RemoteData.wCount)
            {  
			if(s_RemoteData.bToogleBit != ( (s_RemoteData.wRemoteVal & 0x800)?_TRUE_:_FALSE_))
			{
				if(t_RemoteData.wCount < t_RemoteData.wFirstDelay - t_RemoteData.wRepeatDelay)
					t_RemoteData.wCount = t_RemoteData.wFirstDelay;
			}
			else
			{
				if (t_RemoteData.wCount < t_RemoteData.wFirstDelay - t_RemoteData.wRepeatDelay)
				{    
					tdSetValBit(s_ucRemoteFlag, _RF_RC_LEADERCODE_); /*set repeat flag*/
					t_RemoteData.wCount = 20;         /* set the repeat flag immediately   */       
				}                        
			}

            } else
            {
                if(s_RemoteData.bToogleBit != ( (s_RemoteData.wRemoteVal & 0x800)?_TRUE_:_FALSE_))
                {
			s_ucRepeatCnt = 0;
                    s_RemoteData.ucRemoteCode = ucIndex;
                    t_RemoteData.wCount = t_RemoteData.wFirstDelay;
                }
                else
                {  /* value is different, but the toggle bit is same */
			 tvDebugPrint("3\n");
                    tdSetValBit(s_ucRemoteFlag, _RF_RC_LEADERCODE_); /*set repeat flag*/
                    t_RemoteData.wCount = 1;         /* set the repeat flag immediately   */                         
                }
            }
                
            /*save toggle bit*/
            s_RemoteData.bToogleBit = (s_RemoteData.wRemoteVal & 0x800)?_TRUE_:_FALSE_;
        }
        s_RemoteData.ucRemoteCount = 0;
    }
}

Code RemoteControllerDriver f_IRRC5Driver = 
{
    tdIRRC51msTimer, tdIRRC5Service
};