rtd2533b_key.c

Realtek LCD monitor chip RTD25xx source code

//----------------------------------------------------------------------------------------------------
// ID Code      : Key.c No.0000
// Update Note  : 
//
//----------------------------------------------------------------------------------------------------

#define __RTD2533B_KEY__

#include "Common\Header\Include.h"

#if((_SCALER_TYPE == _RTD2533B) || (_SCALER_TYPE == _RTD2023L) || (_SCALER_TYPE == _RTD2023S) || (_SCALER_TYPE == _RTD2023L_VB) || (_SCALER_TYPE == _RTD2023S_VB))


//--------------------------------------------------
// Description  : Key scan process
// Input Value  : None
// Output Value : None
//--------------------------------------------------
void CKeyHandler(void)
{
    // Clear the key message
    ucKeyMessage = _NONE_KEY_MESSAGE;

    if(CKeyScanReady())
    {
        // Store previous key state
        ucKeyStatePrev = ucKeyStateCurr;

        // Get current key state
        ucKeyStateCurr = CKeyScan();

        // Power key process, return if power key is pressed
        if(CKeyPowerKeyProc())
            return;

        // Convert key state to key message, store in (ucKeyNotify)
        CKeyMessageProc();
    }
}

//--------------------------------------------------
// Description  : Check power key process
// Input Value  : None
// Output Value : None
//--------------------------------------------------
void CKeyCheckPowerKey(void)
{
    // Store previous key state
    ucKeyStatePrev = ucKeyStateCurr;

    // Get current key state
    ucKeyStateCurr = CKeyScan();

    // Power key process
    CKeyPowerKeyProc();
}

//--------------------------------------------------
// Description  : Initial key status
// Input Value  : None
// Output Value : None
//--------------------------------------------------
void CKeyInitial(void)
{
    CLR_KEYSCANREADY();
    CLR_KEYSCANSTART();
}

//--------------------------------------------------
// Description  : Key scan ready process. We wait 0.02 sec in order to keep the keypad debounce
// Input Value  : None
// Output Value : None
//--------------------------------------------------
bit CKeyScanReady(void)
{
    if(GET_KEYSCANSTART() && GET_KEYSCANREADY())
    {
        return _TRUE;
    }
    else if(!GET_KEYSCANSTART())
    {
        // Wait 0.02 sec in order to keep the keypad debounce
        SET_KEYSCANSTART();
        CTimerReactiveTimerEvent(SEC(0.02), CKeyScanReadyTimerEvent);

        return _FALSE;
    }
    else
    {
        return _FALSE;
    }
}

//--------------------------------------------------
// Description  : Key scan ready timer event
// Input Value  : None
// Output Value : None
//--------------------------------------------------
void CKeyScanReadyTimerEvent(void)
{
    SET_KEYSCANREADY();
}

//--------------------------------------------------
// Description  : Key repeat enable timer event
// Input Value  : None
// Output Value : None
//--------------------------------------------------
void CKeyRepeatEnableTimerEvent(void)
{
    SET_KEYREPEATSTART();
}

//--------------------------------------------------
// Description  : Key message translation
// Input Value  : ucKeyMask     --> Key mask
//                ucKeyMsg      --> Key message
// Output Value : None
//--------------------------------------------------
void CKeyMessageConvert(BYTE ucKeyMask, BYTE ucKeyMsg)
{
    if((ucKeyStatePrev ^ ucKeyStateCurr) & ucKeyMask)
    {
        ucKeyMessage = ucKeyMsg;
    }
    else
    {
        if(GET_KEYREPEATENABLE())
        {
            if(GET_KEYREPEATSTART())
            {
                ucKeyMessage = ucKeyMsg;
            }
            else
            {
                CTimerActiveTimerEvent(SEC(_KEY_REPEAT_START_TIME),CKeyRepeatEnableTimerEvent);
            }
        }
    }
}

//--------------------------------------------------
// Description  : Power key process
// Input Value  : None
// Output Value : Return _TRUE if power key is pressed
//--------------------------------------------------
bit CKeyPowerKeyProc(void)
{
    if(ucKeyStateCurr & _POWER_KEY_MASK)
    {
        if((ucKeyStatePrev ^ ucKeyStateCurr) & _POWER_KEY_MASK)
        {
            CTimerDelayXms(25);
            ucKeyStateCurr = CKeyScan();

            if((ucKeyStatePrev ^ ucKeyStateCurr) & _POWER_KEY_MASK)
            {
                CKeyPowerKeyMix();

                SET_POWERSWITCH();

                return _TRUE;
            }
        }
    }

    return _FALSE;
}

//--------------------------------------------------
// Description  : Get key status
// Input Value  : None
// Output Value : Return Key status
//--------------------------------------------------
BYTE CKeyScan(void)
{
#if(_KEYPAD_TYPE == _KEYPAD_AD)

    // This AD key's program is for RTD2120.

    BYTE keystate = 0, voltage1 = 0, voltage2 = 0;

    MCU_ADC_CTRL_FF0B = 0x80;
    CTimerDelayXms(3);

    voltage1 = (AD_KEY1 & 0xfc);
    voltage2 = (AD_KEY0 & 0xfc);

    if((0x00 <= voltage1) && (voltage1 < 0x14))         // RIGHT(0.00)  0.00 ~ 0.30
    {
        keystate    = keystate | _LEFT_KEY_MASK;
    }
    if((0x4c < voltage1) && (voltage1 < 0x60))          // LEFT (1.55)  1 ~ 1.26 //1.45 ~ 1.65	 
    {
        keystate    = keystate | _RIGHT_KEY_MASK;
    }	
    if((0xa0 < voltage1) && (voltage1 < 0xb0))          // NONE (2.10)  2.1~2.3 //2.00 ~ 2.20
    {
        keystate    = keystate | _RIGHT_KEY_MASK;				   
    }		   

    if((0x00 <= voltage2) && (voltage2 < 0x14))         // POWER(0.00)  0.00 ~ 0.30
    {
        keystate    = keystate | _POWER_KEY_MASK;
    }
    if((0x4c < voltage2) && (voltage2 < 0x60))          // MENU (1.55)  1.45 ~ 1.65
    {
        keystate    = keystate | _MENU_KEY_MASK;
    }		   
    if((0xa0 < voltage2) && (voltage2 < 0xc0))          // EXIT (2.10)  2.00 ~ 2.20
    {
        keystate    = keystate | _EXIT_KEY_MASK;
    }

    if(keystate != 0)
        CKeyInitial();

    return keystate;

#endif  // End of #if(_KEYPAD_TYPE == _KEYPAD_AD)

#if(_KEYPAD_TYPE == _KEYPAD_NORMAL)

    BYTE keystate = 0;
	
    if(!bRIGHT_KEY)
        keystate    = keystate | _RIGHT_KEY_MASK;
    if(!bLEFT_KEY)
        keystate    = keystate | _LEFT_KEY_MASK;
    if(!bEXIT_KEY)
        keystate    = keystate | _EXIT_KEY_MASK;
    if(!bMENU_KEY)
        keystate    = keystate | _MENU_KEY_MASK;
    if(!bPOWER_KEY)
        keystate    = keystate | _POWER_KEY_MASK;

    if(keystate != 0)
        CKeyInitial();

    return keystate;

#endif  // End of #if(_KEYPAD_TYPE == _KEYPAD_NORMAL)
}

//--------------------------------------------------
// Description  : We can add some settings here while combo key with power key
// Input Value  : None
// Output Value : None
//--------------------------------------------------
void CKeyPowerKeyMix(void)
{
    switch(ucKeyStateCurr)
    {
        case _POWER_RIGHT_KEY_MASK:
            ucOsdEventMsg = _ENTER_FACTORY_MODE_MSG;
            break;

        case _POWER_MENU_KEY_MASK:
            break;

        case _POWER_LEFT_RIGHT_KEY_MASK:
            break;
    }
}

//--------------------------------------------------
// Description  : Convert keypad status into key message, stores in ucKeyNotify
// Input Value  : None
// Output Value : None
//--------------------------------------------------
void CKeyMessageProc(void)
{
    switch(ucKeyStateCurr)
    {
        case _MENU_KEY_MASK:
            CKeyMessageConvert(_MENU_KEY_MASK, _MENU_KEY_MESSAGE);
            break;

        case _RIGHT_KEY_MASK:
            CKeyMessageConvert(_RIGHT_KEY_MASK, _RIGHT_KEY_MESSAGE);
            break;

        case _LEFT_KEY_MASK:
            CKeyMessageConvert(_LEFT_KEY_MASK, _LEFT_KEY_MESSAGE);
            break;

        case _EXIT_KEY_MASK:
            CKeyMessageConvert(_EXIT_KEY_MASK, _EXIT_KEY_MESSAGE);
            break;

        default:
            CLR_KEYREPEATSTART();
            CTimerCancelTimerEvent(CKeyRepeatEnableTimerEvent);
            break;
    }
}

#endif  // End of #if((_SCALER_TYPE == _RTD2533B) || (_SCALER_TYPE == _RTD2023L) || (_SCALER_TYPE == _RTD2023S) || (_SCALER_TYPE == _RTD2023L_VB) || (_SCALER_TYPE == _RTD2023S_VB))