说明：  cameralink总线接口代码，用于接收cameralink协议传输的图像数据。从芯片随路时钟域切换到系统时钟域。 做cameralink接口相关的图像采集系统可以参考。其中的ram是lattice工具生产的。
(cameralink bus interface code for the image data receiving cameralink protocol transmission. Switching chip clock domains with the way the system clock domain. Do cameralink interface-related image acquisition system can refer to.)