手动扩展外部中断INT0、INT1，当INT0 产生中断时，使LED8 亮、灭闪烁4 次；当INT1 产生中断时，使LED 由右向左轮流显示，一次亮两个，循环 4 次。先按 KK1－，观察实验现象，然后按 KK2－，观察实验现象。 硬件连线：P1口接发光二极管D0～D7，INT0～KK1，INT1～KK2 -Manually extend the external interrupt INT0, INT1, when INT0 interrupt generated when so LED8 bright, blinking out 4 times when INT1 generated interruption, so that LED display from right to left alternately, a two-liang, the cycle 4 times. Press KK1-, observed experimental phenomena, and then press KK2-, observed experimental phenomena. Hardware connection: P1 I take light-emitting diodes D0 ~ D7, INT0 ~ KK1, INT1 ~ KK2