1．试编写程序：INT0外部中断。P1口接8个LED，4个为一组，交替亮灭，当INT0出现低脉冲，响应中断，显示流水灯效果。

2．试编写程序：T0计数中断。P1口接8个LED，4个为一组，交替亮灭，当T0计数3次，响应中断，显示流水灯效果。

3．试编写程序： T0定时中断。P1口接8个LED，4个为一组，交替亮灭，当T0定时器定时3秒中断，显示流水灯效果。

-1. Test preparation programs: INT0 external interrupt. P1 port connected 8 LED, 4 in groups, alternating light off, when the INT0 low pulse occurs, the response disruption, showing water light effects. 2. Test preparation programs: T0 counter interrupt. P1 port connected 8 LED, 4 in groups, alternating light off, when the count of 3 times T0, response interruption, water light show effects. 3. Test preparation programs: T0 timer interrupt. P1 port connected 8 LED, 4 in groups, alternating light off, 3 seconds when the T0 timer interrupt timer, display light water effects.