DSP2812流水灯入门实验和按键扫描实验。DSP2812控制1x4独立按键，让初学者进一步掌握端口配置，对于初学者入门很有帮助。-DSP2812 light water entry test and key scanning experiment. The DSP2812 control 1x4 independent keys, for beginners to grasp the port configuration, very helpful for beginners.