基于ZYNQ的HDMI显示端设计与实现

高清晰度多媒体接口(High-Definition Multimedia Interface,HDMI)显示接口是嵌入式实现的视频采集及处理系统的重要组成部分,并有逐渐成为此类系统的显示端标准接口的趋势.然而在ZYNQ平台中由于没有在芯片中集成HDMI控制器,所以普遍采用模拟视频信号显示,限制了处理效果的展示和人机之间的交互.采用ADI的开源HDMI IP核以及Xilinx提供的相关IP核结合ADI HDMI发送器ADV7511,在ZYNQ平台上以软硬件协同的工作方式设计实现了HDMI显示端.方案分别基于无操作系统和Linux操作系统环境实现,其中无操作系统实现可以被移植用于一些特定场合或供硬件系统测试使用;而在Linux操作系统下,通过结合直接渲染管理器(Direct Rendering Manager,DRM),本方案可以方便Linux系统下该显示系统的移植与集成.

The Implementation Of HDMI Display Terminal Based On ZYNQ Video Processing System

HDMI (High-Definition Multimedia Interface) display interface is an important component of embedded video capture and processing field and it also gradually becomes standard display interface in such systems. However, since ZYNQ (a high performance video processing platform with heterogeneous CPU) has no original support to HDMI hardware controller, the representation of processing results and hum-machine interaction are always mitigated due to analog video signal based display scheme. To address this problem, the paper introduces a HDMI video display scheme by synergy between software and hardware on ZYNQ. The scheme exploits the ADI HDMI transmitter ADV7511, combining it with ADI HDMI open source IP core as well as XILINX official IP cores. This design in the environment of with and without operating system respectively. In the case of no OS, this design can be transplanted for hardware system test or for specific usage. In contrast, the implementation of this design in Linux can also be transplanted and integrated within DRM framework for various applications.