MCU 74LS138 extended interrupt-EEWORLD

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Hardware Connection:

Code:

#include

#define uchar unsigned char

#define uint unsigned int

sbit LED = P1^0;

void EX_INT0() interrupt 0

{

fly bi = P2 & 0x07;

P0 = _cror_(0x7f,bi);

}

void main()

{

uint i;

IE = 0x81;

IT0 = 0;

while(1)

{

LED = !LED;

for(i=0;i<30000;i++);

if(INT0 == 1)

P0 = 0xff;

}

Keywords：MCU Reference address：MCU 74LS138 extended interrupt

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