摘要
针对S3C2440在无线通信环境下的VGA显示易受高频信号干扰而导致显示不稳定的问题,对现有的嵌入式VGA接口方案进行分析、改进,设计了基于视频芯片CH7026的视频转换方案。使用独立晶振对微控制器输出的视频信号进行同步,提高了同步信号的抗干扰能力,解决了传统方案在无线通信环境下输出图像不稳定的问题。测试结果表明了此VGA接口方案具有较强的抗干扰能力和稳定性。
To solve the unstable problem of VGA display for the embedded system under the environment of wireless communica- tion, the existing scheme of embedded VGA interface is analyzed, Video conversion scheme based on CH7026 video chip is de- signed. External crystal vibration is used in this scheme to adjust the output video signal, improve the stability of synchronization signal, and solve the problem of traditional scheme in wireless communication environment. Test results show that the VGA in- terface scheme has strong anti-interference ability and stability.
出处
《计算机工程与设计》
CSCD
北大核心
2014年第4期1236-1241,共6页
Computer Engineering and Design
