使用AVR32检测独立按键，一旦检测到按键被按，立马做出指示，非常牛！ 　　目标MCU为32UC3B0256，目标系统采用EVK3B开发板。-Using AVR32 detection independent keys, once detected key is pressed, immediately instructed the very cow! target MCU is 32UC3B0256, the target system using EVK3B development bo