PIC timer interrupt 1 (peripheral interrupt)-EEWORLD

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It belongs to the peripheral interrupt system, so it is a low-priority interrupt when used, and many registers need to be opened: peripheral interrupt enable, timer interrupt 1 enable...

#include

__CONFIG(1,XT); //Crystal oscillator is external 4M

__CONFIG(2,WDTDIS); //Watchdog off

__CONFIG(4,LVPDIS); //Disable low voltage programming

#define uchar unsigned char

#define uint unsigned int

char shuma[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

int count=0;

char sec=0;

//Interrupt function

void interrupt k(void)

{

if(TMR1IF==1) //Judge whether an interrupt occurs

{

TMR1IF=0;

TMR1H=0xff; //Note that the initial value must be reinstalled

TMR1L=0x06;

count++;

if(count==4000)

{

count=0;

sec++;

if(sec>9)

sec=0;

}

void display()

{

PORTD=shuma[sec];

}

void main(void)

{

ADCON1=0X06;

TRISD=0B00000000;

IPEN=0; //Disable interrupt priority

PEIE=1; //Enable all peripheral interrupts that are not disabled

T1CON=0x01; //Enable timer interrupt 1

TMR1IE=1; //Enable current timer interrupt 1

TMR1IF=0; //Software clears interrupt flag

TMR1H=0xff; //Must calculate manually, cannot be done by left shift, right shift, etc.

TMR1L=0x06; //Must calculate manually, cannot be done by shifting left or right, etc.

GIE=1; //Open general interrupt

while(1)

{

display();

}

Keywords：PIC Reference address：PIC timer interrupt 1 (peripheral interrupt)

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