基于STM32F4的多通道串口驱动TFT液晶屏显示系统设计  

Design of TFT LCD display system driven by multi-channel serial port based on STM 32F4

作　　者：任克强[1] 王传强 REN Ke-qiang;WANG Chuan-qiang(School of Information Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学信息工程学院,江西赣州341000

出　　处：《液晶与显示》2020年第5期449-455,共7页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金项目(No.61501210)。

摘　　要：针对TFT液晶屏使用中存在驱动较为复杂以及对处理器要求较高的问题,设计了一种通过串口控制驱动MUC接口TFT液晶屏的显示系统。该系统的硬件由STM32F4处理器和TFT液晶屏组成,STM32F4用于驱动TFT液晶屏,并通过其串口向使用TFT液晶屏显示系统的外部处理器提供控制通道;软件利用μC/OS-Ⅲ操作系统编写底层驱动程序和驱动控制接口程序,采用DMA方式读取串口数据。该系统硬件接口简单,只需要两根I/O线就能对TFT液晶屏进行控制,最大可同时支持4个外部处理器通过串口对TFT液晶屏进行控制,串口传输速率为2.4 KB/s^2 MB/s。实验结果表明,该系统运行稳定可靠,显示效果清晰流畅,简化了TFT液晶屏的驱动和使用,拓展了TFT液晶屏的适应性和使用范围。In order to solve the problem of complex driving and high requirement of processor in TFT LCD,a display system is designed to drive the TFT LCD with MUC interface through serial port control.The hardware of the system is composed of STM32F4 processor and TFT LCD.Stm32f4 is used to drive TFT LCD and provide control channel to the external processor using TFT LCD display system through its serial port.The software usesμC/OS-Ⅲoperating system to write the bottom driver and driver control interface program,and uses DMA to read the serial port data.The hardware interface of the system is simple,only two I/O lines are needed to control the TFT LCD.The system can support four external processors to control the TFT LCD through the serial port.The serial port transmission rate is 2.4 kB/s^2 MB/s.The experimental results show that the system is stable and reliable,the display effect is clear and smooth,the drive and use of TFT LCD are simplified,and the adaptability and use range of TFT LCD are expanded.

关 键 词：TFT液晶屏 液晶屏驱动 串口 μC/OS-Ⅲ 显示 

分 类 号：TP334[自动化与计算机技术—计算机系统结构]