《PROTEUS入门实用教程》实例(包括源代码)

#include <io8535.h> #include <intrinsics.h> #pragma vector=0x02 __interrupt void ext_int0_isr(void) { PORTA=PORTA^0x1; //toggle the LSB of port A } void main(void) { DDRA=0x01; //port A LSB set for output GIMSK=0x40; //set the INT0 bit to enable external interrupt 0 MCUCR=0x02; //set the ISC01 to activate on a falling edge __enable_interrupt(); //enable the global interrupt enable bit while(1) ; //do nothing - the interrupt does it all }