实现多功能闹钟：通过语音芯片的录放音来实现闹铃功能，同时通过时钟芯片实现定时功能，通过矩阵键盘实现调时功能。-Multi function alarm: through the voice chip recording to achieve the alarm function, at the same time through the clock chip to achieve the timing function, through the keyboard matrix to achiev