Design of TFT LCD display system driven by multi-channel serial port based on STM32F4

Ke-qiang REN; Chuan-qiang WANG

doi:10.3788/YJYXS20203505.0449

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Design of TFT LCD display system driven by multi-channel serial port based on STM32F4

Circuit Design and Applications | 更新时间：2020-08-12

- Design of TFT LCD display system driven by multi-channel serial port based on STM32F4
- Chinese Journal of Liquid Crystals and Displays Vol. 35, Issue 5, Pages: 449-455(2020)
- 作者机构：
  
  江西理工大学信息工程学院, 江西赣州 341000
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20203505.0449
  CLC： TP334
- Received：08 November 2019，
  
  Revised：03 March 2020，
  
  Accepted：03 March 2020，
  
  Published：05 May 2020
- 稿件说明：
移动端阅览
Ke-qiang REN, Chuan-qiang WANG. Design of TFT LCD display system driven by multi-channel serial port based on STM32F4[J]. Chinese journal of liquid crystals and displays, 2020, 35(5): 449-455.
DOI：

Ke-qiang REN, Chuan-qiang WANG. Design of TFT LCD display system driven by multi-channel serial port based on STM32F4[J]. Chinese journal of liquid crystals and displays, 2020, 35(5): 449-455. DOI： 10.3788/YJYXS20203505.0449.

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。

Abstract

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 uses μC/OS-Ⅲ operating 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

Keywords

references

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