• State Not Answered
  • Locked Locked
  • Replies 0 replies
  • Subscribers 21 subscribers
  • Views 932 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

External interrupt

robin kendrick

My code for external interrupt is not working.Please help me.
I am able to compile the code but nothing happens when i pull down port p0.14

#include "lpc214x.h" // Header file for Phillips LPC2148 controller
void EXTINTVectoredIRQ (void)__irq;
int main(void)
{
       IODIR1=0xFFFFFFFF;
          IODIR0 = 0x00000001;
     //Turn OFF the LED pins

     //Set P0.14 to EINT1
     PINSEL0 = 0x20000000;
            VICVectCntl0 = 0x0000002F;

     VICVectAddr0 = (unsigned)EXTINTVectoredIRQ;


     VICIntEnable = 0x00008000;
         while(1);
}

void EXTINTVectoredIRQ (void)  __irq
{
int z;
z=IO0PIN&0x00000001;
if(z)
{
IO0CLR=0x00000001;

 }
 else
 {
 IO0SET=0x00000001;

  }

     //Clear the peripheral interrupt flag
     EXTINT = 0x00000002;

     //Dummy write to signal end of interrupt
     VICVectAddr = 0x00000000;
}

0