#include "s3c24xx.h"void EINT_Handle(){    unsigned long oft = INTOFFSET;    unsigned long val;        switch( oft )    {        // K4被按下        case 0:         {               GPBDAT |= (0x0f<<5);   // 所有LED熄滅            GPBDAT &= ~(1<<8);      // LED4點(diǎn)亮            break;        }                // K3被按下        case 2:        {               GPBDAT |= (0x0f<<5);   // 所有LED熄滅            GPBDAT &= ~(1<<7);      // LED3點(diǎn)亮            break;        }        // K1或K2被按下        case 5:        {               GPBDAT |= (0x0f<<5);   // 所有LED熄滅                        // 需要進(jìn)一步判斷是K1還是K2，或是K1、K2被同時(shí)按下            val = EINTPEND;            if (val & (1<<11))                GPBDAT &= ~(1<<6);      // K2被按下，LED2點(diǎn)亮            if (val & (1<<19))                GPBDAT &= ~(1<<5);      // K1被按下，LED1點(diǎn)亮                            break;        }        default:            break;    }    //清中斷    if( oft == 5 )         EINTPEND = (1<<11) | (1<<19);   // EINT8_23合用IRQ5    SRCPND = 1<<oft;    INTPND = 1<<oft;}