tirmitsubishi.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.
 *         2004 - 2005  All rights reserved.
 *
 *  This file provides functions for TV or demoboard remote controller.
 *  The driver is for Mitsubishi IR format.
 *
 *  Revision:
 *  09/10/2004     Created by Ivan Wen.
 *
 */

#include "tdefs.h"
#include "tio.h"
#include "tutils.h"
#include "tvkey.h"
#include "tRemote.h"

#include "thilevel.h"

#include "ttimer.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
{
    Byte ucRemoteTemp;       /*store the temporary value of a code,tdRemoteCodeDetect was call 8 times to generate a code*/
    Byte ucRemoteShift;      /*used to count shift times and generate s_RemoteData.ucRemoteTemp*/
    Byte ucPreviousCountVal; /*timer count value of last time*/
    Byte ucRemoteCode;
    Byte ucOffset;
    Byte ucKeyNum;
} s_RemoteData;

static Void tdIRMI1msTimer(Void)
{
    if (t_RemoteData.wCount == t_RemoteData.wFirstDelay)
    {
        tdAddVirtualKey(s_RemoteData.ucRemoteCode);
        t_RemoteData.wCount--;
    } else if (t_RemoteData.wCount) 
    {
        t_RemoteData.wCount--;
    }
}

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 tdIRMIService(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;
   
    if (tdTestValBitTrue(s_ucRemoteFlag, _RF_MI_STARTED_))
    {
        if ((pMIRemote->Remote_Code_0_Min <= ucRemoteCode) && (ucRemoteCode <= pMIRemote->Remote_Code_0_Max)) /*code 0*/
        {
            tdLeftShift1(s_RemoteData.ucRemoteShift);        
        } else if ((pMIRemote->Remote_Code_1_Min <= ucRemoteCode) && ( ucRemoteCode <= pMIRemote->Remote_Code_1_Max))   /*code 1*/
        {
            s_RemoteData.ucRemoteTemp += s_RemoteData.ucRemoteShift;
            tdLeftShift1(s_RemoteData.ucRemoteShift);        
        } else if(tdTestValBitTrue(s_ucRemoteFlag, _RF_MI_PAUSECODE_) && (pMIRemote->Remote_Code_Pause_Min <= ucRemoteCode) && (ucRemoteCode <= pMIRemote->Remote_Code_Pause_Max))
        {
           tdClearValBit(s_ucRemoteFlag, _RF_MI_PAUSECODE_);
           tdSetValBit(s_ucRemoteFlag, _RF_MI_DATACODE_);
           s_RemoteData.ucRemoteShift = REMOTE_SHIFT_START;          /*0x01*/
           s_RemoteData.ucRemoteTemp = 0x00;
           return;
        }else
        {
            /*if error remote code,do not translate.*/
            tdClearValBit(s_ucRemoteFlag, (_RF_MI_STARTED_));
            goto detect_head;
        }

        if (s_RemoteData.ucRemoteShift)        /*if hasn't finished to shift eight times, return. */
            return;

        if (tdTestValBitTrue(s_ucRemoteFlag, _RF_MI_SYSTEMCODE_))  /*Is the second code*/
        {
            tdClearValBit(s_ucRemoteFlag, _RF_MI_SYSTEMCODE_);
            if(pMIRemote->ucSystemCode == s_RemoteData.ucRemoteTemp)
            {
                tdSetValBit(s_ucRemoteFlag, _RF_MI_PAUSECODE_);
                return;
            }else
            {
                s_ucRemoteFlag = 0;
                return;
            }
        }

        if(tdTestValBitTrue(s_ucRemoteFlag, _RF_MI_DATACODE_))
        {
            ucIndex = 0;
            tdClearValBit(s_ucRemoteFlag, _RF_MI_DATACODE_);
            while(*((RPByte)pMIRemote +pMIRemote->ucKeyOffset +  2 * ucIndex) != s_RemoteData.ucRemoteTemp)
            {
                ucIndex ++;
            }
            if(ucIndex < pMIRemote->ucKeyNum)
            {
                s_RemoteData.ucRemoteTemp = *((RPByte)pMIRemote + pMIRemote->ucKeyOffset + 2 * ucIndex + 1);
                if(s_RemoteData.ucRemoteCode == s_RemoteData.ucRemoteTemp)
                {
                    if(t_RemoteData.wCount == 0)
                    {
                        t_RemoteData.wCount = t_RemoteData.wFirstDelay;
                        s_ucRemoteFlag = 0;
                        return;
                    }
                }else
                {
                     t_RemoteData.wCount = t_RemoteData.wFirstDelay;
                     s_RemoteData.ucRemoteCode = s_RemoteData.ucRemoteTemp;
                     s_ucRemoteFlag = 0;
                     return;
                }
            }
        }
    }
                     
detect_head:
    if ((pMIRemote->Remote_Code_Sync_Min <= ucRemoteCode) && (ucRemoteCode <= pMIRemote->Remote_Code_Sync_Max))   /*sync code*/
    {
        s_ucRemoteFlag = 0;
        tdSetValBit(s_ucRemoteFlag, _RF_MI_STARTED_|_RF_MI_SYSTEMCODE_);   /*started parsing*/
        s_RemoteData.ucRemoteShift = REMOTE_SHIFT_START;          /*0x01*/
        s_RemoteData.ucRemoteTemp = 0x00;
    }
    return;
}

Code RemoteControllerDriver f_IRMIDriver = 
{
    tdIRMI1msTimer, tdIRMIService
};