80C51 MCU Program (4)-EEWORLD

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//80C51 MCU program - use of interrupts

#include   //Include reg52.h header file
#define uint unsigned int   //Macro definition of uint data type is unsigned int type
#define uchar unsigned char   //Macro definition of uchar data type is unsigned char type
sbit D1=P2^6;
sbit W1=P2^7;
sbit D2=P1^0;
uchar num;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};   //Common cathode digital tube 0-9
void delay(uint z); //Declare delay subfunction
void main()
{
    EA=1;//Open total interrupt
    EX0=1;//Open external interrupt 0
    TCON=0x01; //Open jump
    W1=1;   //Send high potential to the latch to open the latch

    P0=0xea;
    W1=0;    //Send low voltage to the latch and close the latch
    while(1)
   {
        for(num=0;num<10;num++)   //Loop 10 times, display numbers 0-9
        {
              D1=1;   //Turn off the digital tube display
              P0=table[num];
             D1=0;   //Open the bit port
             delay(1000);    //Delay program
         }
    }
}

void delay(uint z)   //delay sub-function with parameters
{
    uint x,y;
   for(x=z;x>0;x--)
       for(y=110;y>0;y--);   //enter a nested loop
}

void exter0() interrupt 0 //External interrupt 0 program
{
D2=0;
}

Keywords：80C51 Reference address：80C51 MCU Program (4)

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