做项目用单片机配置的ad9984代码，此部分是用芯片的YUV输入端，将YUV信号转换为 4：2:220bit给后级使用，因为涉及项目只贴出ad9984_YUV配置部分。-Do projects MCU configuration ad9984 code, this part is YUV input of the chip, the signal is converted to 4:2:220 bit YUV to use after the class, because it involves only posted ad9984_YUV project configuration section.