avr单片机，M16.三个按键，中间长按可以打开和关闭灯的闪烁控制。当打开后，当按左边键时，LED灯闪烁一次；当按中间键时，LED灯闪烁两次；当按右键时，LED灯闪烁三次。-avr microcontroller, M16 three keys, in the middle, long press to open and close the lights flashing control. When opened, press the left button, LED light flashes once　When you press the middle button, the LED light flashes twice　when right-click, the LED light flashes three times.