Introduction - If you have any usage issues, please Google them yourself
1, no external interrupt signal, the light emitting diode LED5 and LED6 light
2, when the INT0 interrupt signal is generated, the light-emitting diodes LED1, LED2, LED7 LED8 and bright, with the buzzer sounds loudly
3, when the INT1 interrupt signal is generated, the light emitting diode LED3 and LED4 light, accompanied by the buzzer sounds twice