51 MCU serial port T1 plus watchdog program-EEWORLD

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Circuit diagram of digital tube part

program:

#include

#define UCHAR unsigned char

#define UINT unsigned int

sfr WDT_CONTR = 0xe1;

UCHAR table[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

FLY timer;

FLY counter;

void initserial(void)

{

timer='0';

contain=0;

TMOD=0X20;

SCON=0X50;

TL1=0xFD;

TH1=0xFD;

EA=1;

EN=1;

TR1=1;

}

void Delay_1ms(UCHAR i) //1ms delay

{

FLY x,j;

for(j=0;j

for(x=0;x<=148;x++);

}

void segdisplay(void)

{

P0 = 0; //Blanking

P2 = 6; //The 7th digital tube displays

P0 = table[conter / 10]; //Get the tens digit of i here

Delay_1ms(5); //Display the next number after 0.5 seconds delay

P0 = 0; //Blanking

P2 = 7; //The 8th digital tube display

P0 = table[conter % 10]; //Get the unit digit of i here

Delay_1ms(5);

P0=0;

}

void main()

{

initserial();

WDT_CONTR=0x3c;

while(1)

{

conter=timer-'0';

segdisplay();

WDT_CONTR=0x3c;

}

void serial_t2(void)interrupt 4

{

if(RI)

{

RI=0;

timer=SBUF;

SBUF=timer;

}

if(TI)

{

IF = 0;

}

Reference address：51 MCU serial port T1 plus watchdog program

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