#include <LPC21xx.h>
#include <stdio.h>
#include "EXT.h"
#include "uart0.h"

unsigned int a=1,b=1,c=1,buf=0,buf1=0,abuf=0,abuf1=0;
void ExtInt(void)
{
    PINSEL0 |= 0x80000000;          //Enable the EXTINT2 interrupt
    PINSEL0 |= 0x20000000;          //Enable the EXTINT1 interrupt
    PINSEL0 |= 0x000C0000;          //Enable the EXTINT3 interrupt
    VICVectCntl1    = 0x00000020 | 0x0000000F;          //select a priority slot for a given interrupt
    VICVectAddr1    = (unsigned)EXTINT1VectoredIRQ;     //pass the address of the IRQ into the VIC slot
    VICVectCntl2    = 0x00000020 | 0x00000010;          //select a priority slot for a given interrupt
    VICVectAddr2    = (unsigned)EXTINT2VectoredIRQ;     //pass the address of the IRQ into the VIC slot
    VICVectCntl3    = 0x00000020 | 0x00000011;          //select a priority slot for a given interrupt
    VICVectAddr3    = (unsigned)EXTINT3VectoredIRQ;     //pass the address of the IRQ into the VIC slot

    VICIntEnable    |= 0x00020000;                      //enable EXTINT3 interrupt
    VICIntEnable    |= 0x00010000;                      //enable EXTINT2 interrupt
    VICIntEnable    |= 0x00008000;                      //enable EXTINT1 interrupt

}
void EXTINT1VectoredIRQ (void)__irq
{
    delay(2500000);
    if (a == 1)
    {
        printf("current time\n");
        a++;
        buf=0;
        buf1=0;
    }
    else if(a == 2){
        printf("alarm time\n");
        a= 1;
        abuf=0;
        abuf1=0;
    }

    EXTINT  = 0x00000002;                   //Clear the peripheral interrupt flag
    VICVectAddr     = 0x00000000;           //Dummy write to signal end of interrupt
}
void EXTINT2VectoredIRQ (void)__irq
{
    delay(2500000);
    if (a == 2)
    {
       if(b==1 && buf==0){
            printf("current time ok\n");
            b++;
            buf=1;
            abuf1=0;
       }
       else if (b==2 && buf==1){
            printf("current hour\n");
            b++;
            abuf1=0;
       }
       else if (b==3 && buf==1){
            printf("current min\n");
            b++;
            abuf1=0;
       }
       else if (b==4 && buf==1){
            printf("current sec\n");
            b= 2;
            abuf1=0;
       }
    }
    else if (a == 1){
       if(c==1 && abuf==0){
            printf("alarm time ok\n");
            abuf++;
            c++;
            abuf1=0;
       }
       else if (c==2 && abuf==1){
            printf("alarm hour\n");
            c++;
            abuf1=0;
       }
       else if (c==3 && abuf==1){
            printf("alarm min\n");
            c++;
            abuf1=0;
       }
       else if (c==4 && abuf==1){
            printf("alarm sec\n");
            c= 2;
            abuf1=0;
       }

    }
    EXTINT  = 0x00000004;                   //Clear the peripheral interrupt flag
    VICVectAddr     = 0x00000000;
}
void EXTINT3VectoredIRQ (void)__irq
{
    delay(2500000);
    if (a == 2 && b==2)
    {   if(buf1==0){
            printf("set sec ok\n");
            buf1=1;
            }
        else if (buf1==1){
            if(SEC>58){
                SEC=0;
                printf("%d\n",SEC);
            }
            else{
            printf("%d\n",SEC+1)    ;
            SEC++;

            }
         }
    }
    else if (a == 2 && b==4)
    {   if(buf1==0){
            printf("set min ok\n");
            buf1=1;
            }
        else if (buf1==1){
            if(MIN>58){
                MIN=0;
                printf("%d\n",MIN);
            }
            else{
                printf("%d\n",MIN+1)    ;
                MIN++;

            }
         }
     }
     else if (a == 2 && b==3)
    {   if(buf1==0){
            printf("set hour ok\n");
            buf1=1;
            }
        else if (buf1==1){
            if(HOUR>22){
                HOUR=0;
                printf("%d\n",HOUR);
            }
            else{
            printf("%d\n",HOUR+1)   ;
            HOUR++;

            }
         }
    }
    if (a == 1 && c==2)
    {   if(abuf1==0){
            printf("set sec ok\n");
            abuf1=1;
            }
        else if (abuf1==1){
            if(ALSEC>58){
                ALSEC=0;
                printf("%d\n",ALSEC);
            }
            else{
            printf("%d\n",ALSEC+1)  ;
            ALSEC++;

            }
         }
    }
    else if (a == 1 && c==4)
    {   if(abuf1==0){
            printf("set min ok\n");
            abuf1=1;
            }
        else if (abuf1==1){
            if(ALMIN>58){
                ALMIN=0;
                printf("%d\n",ALMIN);
            }
            else{
                printf("%d\n",ALMIN+1)  ;
                ALMIN++;

            }
         }
     }
    else if (a == 1 && c==3)
    {   if(abuf1==0){
            printf("set hour ok\n");
            abuf1=1;
            }
        else if (abuf1==1){
            if(ALHOUR>22){
                ALHOUR=0;
                printf("%d\n",ALHOUR);
            }
            else{
            printf("%d\n",ALHOUR+1) ;
            ALHOUR++;

            }
         }
    }



    EXTINT  = 0x00000008;                   //Clear the peripheral interrupt flag
    VICVectAddr     = 0x00000000;           //Dummy write to signal end of interrupt
}