www.pudn.com > ADS_s3c2440a.rar > Eint.c

/***************************************** 
  NAME: eint.c 
  DESC: External interrupt test 
  HISTORY: 
  2001.04.03:purnnamu: draft ver 0.0 
  2003.05.xx:DonGo: modifed for 2440 ver 0.1 
 *****************************************/ 
 
#include  
#include "def.h" 
#include "option.h" 
#include "2440addr.h" 
#include "2440lib.h" 
#include "2440slib.h"  
 
#include "eint.h" 
 
static void __irq Eint0Int(void) 
{ 
    ClearPending(BIT_EINT0); 
    Uart_Printf("EINT0 interrupt is occurred.\n"); 
} 
 
static void __irq Eint2Int(void) 
{ 
    ClearPending(BIT_EINT2); 
    Uart_Printf("EINT2 interrupt is occurred.\n"); 
} 
 
static void __irq Eint11_19(void) 
{ 
    if(rEINTPEND==(1<<11)) 
    { 
	Uart_Printf("EINT11 interrupt is occurred.\n"); 
	rEINTPEND=(1<<11); 
    } 
    else if(rEINTPEND==(1<<19)) 
    { 
	Uart_Printf("EINT19 interrupt is occurred.\n"); 
	rEINTPEND=(1<<19); 
    } 
    else 
    { 
	Uart_Printf("rEINTPEND=0x%x\n",rEINTPEND); 
	rEINTPEND=(1<<19)|(1<<11); 
    } 
    ClearPending(BIT_EINT8_23); 
} 
 
// SMDK2440 EINT S/W 
// EINT0/2/11/19 
void Test_Eint(void) 
{ 
    int i; 
    int extintMode; 
 
    Uart_Printf("[External Interrupt Test through PF0/2/11/19]\n"); 
 
    Uart_Printf("1.L-LEVEL  2.H-LEVEL  3.F-EDGE  4.R-EDGE  5.B-EDGE\n"); 
    Uart_Printf("Select the external interrupt type.\n"); 
    extintMode=Uart_Getch(); 
 
    //extintMode='3'; 
    rGPFCON = (rGPFCON & 0xffcc)|(1<<5)|(1<<1);		//PF0/2 = EINT0/2 
    rGPGCON = (rGPGCON & 0xff3fff3f)|(1<<23)|(1<<7);	//PG3/11 = EINT11/19 
      
    switch(extintMode) 
    { 
    case '1': 
    	rEXTINT0 = (rEXTINT0 & ~((7<<8)  | (0x7<<0))) | 0x0<<8 | 0x0<<0; //EINT0/2=low level triggered 
	rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x0<<12; //EINT11=low level triggered 
	rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x0<<12; //EINT19=low level triggered 
    	break; 
    case '2': 
    	rEXTINT0 = (rEXTINT0 & ~((7<<8)  | (0x7<<0))) | 0x1<<8 | 0x1<<0; //EINT0/2=high level triggered 
	rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x1<<12; //EINT11=high level triggered 
	rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x1<<12; //EINT19=high level triggered 
    	break; 
    case '3': 
    	rEXTINT0 = (rEXTINT0 & ~((7<<8)  | (0x7<<0))) | 0x2<<8 | 0x2<<0; //EINT0/2=falling edge triggered 
	rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x2<<12; //EINT11=falling edge triggered 
	rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x2<<12; //EINT19=falling edge triggered 
    	break; 
    case '4': 
    	rEXTINT0 = (rEXTINT0 & ~((7<<8)  | (0x7<<0))) | 0x4<<8 | 0x4<<0; //EINT0/2=rising edge triggered 
	rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x4<<12; //EINT11=rising edge triggered 
	rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x4<<12; //EINT19=rising edge triggered 
     	break; 
    case '5': 
    	rEXTINT0 = (rEXTINT0 & ~((7<<8)  | (0x7<<0))) | 0x6<<8 | 0x6<<0; //EINT0/2=both edge triggered 
	rEXTINT1 = (rEXTINT1 & ~(7<<12)) | 0x6<<12; //EINT11=both edge triggered 
	rEXTINT2 = (rEXTINT2 & ~(7<<12)) | 0x6<<12; //EINT19=both edge triggered 
    	break; 
    default: 
    	break; 
    } 
 
    Uart_Printf("Press the EINT0/2/11/19 buttons or Press any key to exit.\n"); 
 
    pISR_EINT0=(U32)Eint0Int; 
    pISR_EINT2=(U32)Eint2Int; 
    pISR_EINT8_23=(U32)Eint11_19; 
 
    rEINTPEND = 0xffffff; 
    rSRCPND = BIT_EINT0|BIT_EINT2|BIT_EINT8_23; //to clear the previous pending states 
    rINTPND = BIT_EINT0|BIT_EINT2|BIT_EINT8_23; 
     
    rEINTMASK=~( (1<<11)|(1<<19) ); 
    rINTMSK=~(BIT_EINT0|BIT_EINT2|BIT_EINT8_23); 
		 
    Uart_Getch(); 
     
    rEINTMASK=0xffffff; 
    rINTMSK=BIT_ALLMSK; 
}