ZigBee learning in simple terms lesson 3 external interruption

Configuration of external interrupts
1. initialization IO Mouth work in ordinary IO、 Pull up input status . PxSEL PxDIR PxINP
2. First of all IO Port group interrupt , from P0IE=1（P0 Port interrupt ） P1IE P2IE decision （ Group enable ）
3. For a specific in the group IO Mouth interruption , from P0IEN P1IEN P2IEN decision ( Terminal enable )
4 Rising edge or falling edge triggers ,PICTL Registers determine ,0 Represents the rising edge ,1 Represents the falling edge
   D7                  D6      D5      D4        D3                   D2                    D1                   D0
   I/O Driving ability   Unused     Unused     Unused    P2_0~P2_4     P1_3~P1_7      P1_0~P1_3     P0_0~P0_7
  notes ：D0 Position one , namely PICTL&=0x01;//0000 0001, indicate P0 Group (P0_0~P0_7) Both are falling edges .
5. open CPU Total interruption EA=1 （ Total interrupt enable ）

Interrupt function ：
#pragma vector=PxINT_VECTOR
__interrupt void fn()
{
 PxIFG=0;// Zero clearing
 PxIF=0;
}

Code With P0_5 Example , Falling edge trigger
#include<iocc2530.h>
void delay()
{
   int i,j;
   for(i=0;i<1000;i++)
     for(j=0;j<30;j++);
}
void main()
{
  P0SEL&=0xDF ;//1101 1111 Ordinary IO mouth
  P0DIR&=0xDF ;//1101 1111 Output
  P0INP&=0xDF ;//1101 1111 Up and down mode
  P2INP&=0xDF ; //1101 1111 Pull up mode

  EA=1;              //  
  P0IE=1;             // If P1IE To set up for 1, Then we can't just use P1IE=1,IEN2 |=0x10;//0001 0000 8 Bit divisible can be directly set to one ,8 If a bit cannot be divided by an integer, add
  IEN2 |=0x10;// amount to P1IE=1
  P0IEN|= 0x20;  //0010 0000 Set three interrupt enable flag bits , Turn on the corresponding interrupt switch , When the switch is closed, it means that the interrupt is on

  PICLE&=0x01;//0000 0001 hold P0 This group is configured to trigger the falling edge

  while（1）
}

#pragma vector=P0INT_VECTOR
__interrupt void Function name （）
{
    if（P0IFG & 0x20）//0010 0000
    {//P0 Fifth place of the group P0_5 Caused an external interrupt
       delay() ; // The delay function is used to eliminate chattering
        if(0==P0_5)
         {// The description is really connected to P0_5 The button of triggers an external interrupt
           P1_0^=1;// Exclusive or operation Turned out to be 0 become 1, Turned out to be 1 become 0

         }
    }

   P0IFG=0;
   P0IF=0;
}