2410_eint.c

广嵌GEC2410开发板学习教材源码

#include "2410lib.h"
#include "2410addr.h"
//使用K1按键触发EINT0，EINT0－>GPF0
//使用K3按键触发EINT2，EINT2－>GPF2
//使用K5按键触发EINT11，EINT11－>GPG3
//使用K7按键触发EINT19，EINT19－>GPG11
//KSCAN0－>GPE11

/***********  外部中断服务程序  ************/
static void __irq Eint0_ISR(void)
{
    ClearPending(BIT_EINT0);
    Uart_Printf("EINT0  is occurred.\n");
}

static void __irq Eint2_ISR(void)
{
    ClearPending(BIT_EINT2);
    Uart_Printf("EINT2 is occurred.\n");
}

static void __irq Eint11_19_ISR(void)
{
    if(rEINTPEND & (1<<11))
    {
	    Uart_Printf("EINT11 is occurred.\n");
	    rEINTPEND=(1<<11);
        ClearPending(BIT_EINT8_23);
    }
    else if(rEINTPEND & (1<<19))
    {
	    Uart_Printf("EINT19 is occurred.\n");
	    rEINTPEND=(1<<19);
        ClearPending(BIT_EINT8_23);
    }
    else
    {
	    Uart_Printf("others ENTs are occurred\n");
	    rEINTPEND=0xffffff;
        ClearPending(BIT_EINT8_23);
    }
}

/***********  外部中断初始化  ************/
void Eint_Init(void)
{
    //设置GPE11为输出0
	rGPECON = (rGPECON|(3<<22)) & ~(2<<22);
	rGPEUP |= (1<<11);
	rGPEDAT &= ~(1<<11);
	
    rGPFCON = rGPFCON & ~(3)|(1<<1);	  //GPF0设置为EINT0
    rGPFCON = rGPFCON & ~(3<<4)|(1<<5);	  //GPF2设置为EINT2	
    rGPGCON = rGPGCON & ~(3<<6)|(1<<7);	  //GPG3设置为EINT11
    rGPGCON = rGPGCON & ~(3<<22)|(1<<23); //GPG11设置为EINT19

     
    rGPFUP|=(1<<0);    //disable GPF0 pull up
    rGPFUP|=(1<<2);    //disable GPF2 pull up
    rGPGUP|=(1<<3);   //disable GPG3 pull up  
	rGPGUP|=(1<<11);   //disable GPG11 pull up
	
	rEXTINT0 = (rEXTINT0 & ~(7<<0))|(2<<0);     //EINT0 －>falling edge triggered
	rEXTINT0 = (rEXTINT0 & ~(7<<8))|(2<<8);     //EINT2 －>falling edge triggered
	rEXTINT1 = (rEXTINT1 & ~(7<<12))|(0x2<<12); //EINT11－>falling edge triggered
	rEXTINT2 = (rEXTINT2 & ~(7<<12))|(0x2<<12); //EINT19－>falling edge triggered	
   
    pISR_EINT0 = (unsigned)Eint0_ISR;
    pISR_EINT2 = (unsigned)Eint2_ISR;
    pISR_EINT8_23 = (unsigned)Eint11_19_ISR;
}
/***********  开外部中断  ************/
void Enable_Eint(void)
{
    rEINTPEND = 0xffffff; //to clear the previous pending states
    rSRCPND |= BIT_EINT0|BIT_EINT2|BIT_EINT8_23;
    rINTPND |= BIT_EINT0|BIT_EINT2|BIT_EINT8_23;
    
    rEINTMASK=~( (1<<11)|(1<<19) );
    rINTMSK=~(BIT_EINT0|BIT_EINT2|BIT_EINT8_23); 
}

int xmain()
{
             
    ChangeClockDivider(1,1);
    ChangeMPllValue(0xa1,0x3,0x1);   
    Port_Init();
    Uart_Select(0);
    Uart_Init(0,115200);
     
    Eint_Init();   
    Enable_Eint();

    while(1)
    {     				//等待中断，死循环
        Uart_Printf("the main is running\n");
        Delay(5000);     
    }
}