Blue Bridge Cup SCM module code (external interrupt) (code + comment)

/* The explanation in the previous chapter will not be repeated */
#include "STC15F2K60S2.H"

typedef unsigned char u8;
typedef unsigned int u16;

void close()
{
  P0=0;
  P2=P2&0X1F|0XAF;
  P2=P2&0X1F;
  P0=0XFF;
  P2=P2&0X1F|0X8F;
  P2=P2&0X1F;
}

void open()
{
  EA=1;
/* Open total interrupt */
  EX1=1;
  EX0=1;
/* Allow external interrupts 0,1 Trigger */
  IT1=1;
  IT0=1;
/* Select falling edge trigger mode */
}
/* This function is the open interrupt function */

void main()
{ 
  close();
  open();
  while(1)
  {
  }
}

void stop1() interrupt 0
{
  P0=~1;
  P2=P2&0X1F|0X80;
  P2=P2&0X1F;
}
/* Press down S5 Light on */

void stop2() interrupt 2
{
  P0=~0;
  P2=P2&0X1F|0X80;
  P2=P2&0X1F;
}
/* Press down S4 The light goes out */
/* In the user manual 1.1.10 in , It can be found P3.2,P3.3 Can be used to trigger external interrupts ,interrupt The last number can be found in the user manual 6.4 Query at other places */

Official schematic diagram , The download address of the user manual is as follows ：

link ：https://pan.baidu.com/s/1y8lRYHxLKojL4_r0PZPYRw 
Extraction code ：19so

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Study notes for undergraduate students of Nanjing University of Information Engineering , For your reference .

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