FreeRTOS在ZYNQ实时液晶显示系统中的应用  

Application of FreeRTOS in real-time LCD system based on ZYNQ

作　　者：易文博 陈国平[1] 管春[1] YI Wenbo;CHEN Guoping;GUAN Chun(School of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《现代电子技术》2020年第22期15-18,22,共5页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(61671091)。

摘　　要：为解决传统液晶显示实时性较差、设备性能较低等问题,设计一种基于FreeRTOS与Zynq-7000平台的实时液晶显示系统。该系统采用基于AXI4-Stream总线体制的流化数据传输模型和基于可重用IP的系统设计方法,并综合使用实时操作系统FreeRTOS和μC/GUI用户图形界面进行多任务管理以及人机界面设计,实现数据实时处理、存储与显示等功能。实验结果表明,该系统每秒传输帧数高达约90帧,任务切换时间小于2μs,整体功耗小于4 W,相比传统液晶显示性能提高2~3倍,满足高性能、低功耗与实时性要求。该系统还可通过集成视频图像硬件加速器等功能模块,进一步体现实时液晶显示系统的可扩展性与应用价值。A real-time LCD(liquid crystal display)system based on FreeRTOS and ZYNQ-7000 platform is designed to solve the problems of poor real-time performance and low equipment performance of traditional LCD.In the system,the streaming data transmission model based on AXI4-Stream bus system and the system design method based on reusable IP are adopted,and the real-time operating system FreeRTOS andμC/GUI user graphical interface are comprehensively used to carry out the multi-task management and human-machine interface design,so as to realize the functions of real-time data processing,storage and display.The experimental results show that the system can transmit up to 90 frames per second,the task switching time is less than 2μs,the overall power consumption is less than 4 W,and the performance of the system is improved by about 2 to 3 times by combining with the traditional LCD,which meets the requirements of high performance,low power consumption and real-time performance.The system can further reflect the scalability and application value of the real-time LCD system by integrating the video image hardware accelerator and other functional modules.

关 键 词：ZYNQ-7000 液晶显示系统 系统设计 FREERTOS ΜC/GUI 系统测试 

分 类 号：TN248-34[电子电信—物理电子学] TP274[自动化与计算机技术—检测技术与自动化装置]