key.c

/**************************************************************
4*4 Key Scan
**************************************************************/

#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h" 

/******************************************************************************
    1X6 ¾ØÕó¼üÅÌ
Áù¸öÊäÈëÒý½Å£º    EINT8 -----( GPG0  )
                EINT11 -----( GPG3  )
                EINT13-----( GPG5  )
                EINT14-----( GPG6 )
                EINT15-----( GPG7 )
                EINT19-----( GPG11 )
                
                
******************************************************************************/
U16 Key_Scan( void )
{
    Delay( 80 ) ;

    if(      (rGPGDAT&(1<< 0)) == 0 )    
        return 1 ;
    else if( (rGPGDAT&(1<< 3)) == 0 )
        return 2;
    else if( (rGPGDAT&(1<< 5)) == 0 )
        return 3 ;
    else if( (rGPGDAT&(1<< 6)) == 0 )
        return 4 ;
    else if( (rGPGDAT&(1<< 7)) == 0 )
        return 5 ;
    else if( (rGPGDAT&(1<<11)) == 0 )
        return 6 ;
    else
        return 0;

}

static void __irq Key_ISR(void)
{
    U8 key;
    U32 r;

    EnterCritical(&r);
    if(rINTPND==BIT_EINT8_23) {
        ClearPending(BIT_EINT8_23);
        if(rEINTPEND&(1<<8)) {
        //Uart_Printf("eint11
");
            rEINTPEND |= 1<< 8;
        }
        if(rEINTPEND&(1<<11)) {
        //Uart_Printf("eint11
");
            rEINTPEND |= 1<< 11;
        }
        if(rEINTPEND&(1<<13)) {
        //Uart_Printf("eint11
");
            rEINTPEND |= 1<< 13;
        }
        if(rEINTPEND&(1<<14)) {
        //Uart_Printf("eint11
");
            rEINTPEND |= 1<< 14;
        }
        if(rEINTPEND&(1<<15)) {
        //Uart_Printf("eint11
");
            rEINTPEND |= 1<< 15;
        }
        if(rEINTPEND&(1<<19)) {
        //    Uart_Printf("eint19
");        
            rEINTPEND |= 1<< 19;
        }
    }

    key=Key_Scan();
    if( key == 0xff )
        Uart_Printf( "Interrupt occur... Key is released!
") ;
    else
        Uart_Printf( "Interrupt occur... K%d is pressed!
", key) ;

    ExitCritical(&r);
}

void KeyScan_Test(void)
{
    Uart_Printf("
Key Scan Test, press ESC key to exit !
");    

    
    rGPGCON = rGPGCON & (~((3<<22)|(3<<6)|(3<<0)|(3<<10)|(3<<12)|(3<<14))) |
                         ((2<<22)|(2<<6)|(2<<0)|(2<<10)|(2<<12)|(2<<14)) ;        //GPG11,3 set EINT
    
    rEXTINT1 &= ~(7|(7<<0));    
    rEXTINT1 |= (0|(0<<0));    //set eint8 falling edge int
    
    rEXTINT1 &= ~(7<<12);
    rEXTINT1 |= (0<<12);    //set eint11 falling edge int
    
    rEXTINT1 &= ~(7<<20);
    rEXTINT1 |= (0<<20);    //set eint13 falling edge int
    
    rEXTINT1 &= ~(7<<24);
    rEXTINT1 |= (0<<24);    //set eint14 falling edge int
    
    rEXTINT1 &= ~(7<<28);
    rEXTINT1 |= (0<<28);    //set eint15 falling edge int
        
    rEXTINT2 &= ~(0xf<<12);
    rEXTINT2 |= (0<<12);    //set eint19 falling edge int
    

    rEINTPEND |= (1<<8)|(1<<11)|(1<<13)|(1<<14)|(1<<15)|(1<<19);        //clear eint 11,19
    rEINTMASK &= ~((1<<8)|(1<<11)|(1<<13)|(1<<14)|(1<<15)|(1<<19));    //enable eint11,19
    ClearPending(BIT_EINT0|BIT_EINT2|BIT_EINT8_23);
    pISR_EINT0 = pISR_EINT2 = pISR_EINT8_23 = (U32)Key_ISR;
    EnableIrq(BIT_EINT0|BIT_EINT2|BIT_EINT8_23);    

     while( Uart_GetKey() != ESC_KEY ) ;
     DisableIrq(BIT_EINT0|BIT_EINT2|BIT_EINT8_23);    
}