SN8F5708 datasheet(79/204 Pages) SONIX

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SN8F5708 Series

External Interrupt

Datasheet Rev. 2.4

13.2

Sample Code

The following sample code demonstrates how to perform INT0/INT1/INT2 with interrupt.

#define INT0Rsing

(1 << 0) //INT0 trigger edge is rising edge

#define INT0Falling

(2 << 0) //INT0 trigger edge is falling edge

#define INT0LeChge

(3 << 0) //INT0 trigger edge is level chagne

#define EINT0

(1 << 0) //INT0 interrupt enable

#define INT1Rsing

(1 << 2) //INT1 trigger edge is rising edge

#define INT1Falling

(2 << 2) //INT1 trigger edge is falling edge

#define INT1LeChge

(3 << 2) //INT1 trigger edge is level chagne

#define EINT1

(1 << 2) //INT1 interrupt enable

#define INT2Rsing

(1 << 4) //INT2 trigger edge is rising edge

#define INT2Falling

(2 << 4) //INT2 trigger edge is falling edge

#define INT2LeChge

(3 << 4) //INT2 trigger edge is level chagne

#define EINT2

(1 << 6) //INT2 interrupt enable

void EnableINT(void)

{

// INT0 rising edge, INT1 falling edge, INT2 level change

PEDGE = INT0Rising |INT1Falling | INT2LeChge;

// Enable INT0/INT1 interrupt

IEN0 |= EINT0 | EINT1;

// Enable INT2 interrupt

IEN4 |= EINT2;

// Enable total interrupt

IEN0 |= 0x80;

P0 = 0x00;

P0M = 0x07;

}

void INT0Interrupt(void) interrupt ISRInt0 //0x03

{ //IE0 clear by hardware

P00 = ~P00;

}

void INT1Interrupt(void) interrupt ISRInt1 //0x13

{ //IE1 clear by hardware

P01 = ~P01;

}

void INT2Interrupt(void) interrupt ISRInt2 //0xEB

{ //IE2 clear by hardware

P02 = ~P02;

}

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