ex0.c

单片机应用开发实例.rar

// ex0.c
unsigned char ex0_isr_counter = 0;
void ex0_isr (void) interrupt 0
{
ex0_isr_counter++;                               //计数
}
void main (void)
{
//构造外部中断0 INT0(P3.2)
IT0 = 1;                                        //下降沿触发/INT0 (P3.2)
EX0 = 1;                                       //开EX0中断
EA = 1;                                        //开放中断
while (1)
         {
        }
}