Design and implementation of programmable power display system based on STM32F7

Peng-ju WANG; Feng HE; Guo-ping CHEN; Chun GUAN; Xiang ZHANG

doi:10.37188/CJLCD.2020-0344

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Design and implementation of programmable power display system based on STM32F7

Driving and Controlling | 更新时间：2021-07-13

- Design and implementation of programmable power display system based on STM32F7
- Chinese Journal of Liquid Crystals and Displays Vol. 36, Issue 7, Pages: 973-982(2021)
- 作者机构：
  
  1.重庆邮电大学光电工程学院, 重庆 400065
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(61671091)
- DOI：10.37188/CJLCD.2020-0344
  CLC：
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Peng-ju WANG, Feng HE, Guo-ping CHEN, et al. Design and implementation of programmable power display system based on STM32F7. [J]. Chinese Journal of Liquid Crystals and Displays 36(7):973-982(2021)
DOI：

Peng-ju WANG, Feng HE, Guo-ping CHEN, et al. Design and implementation of programmable power display system based on STM32F7. [J]. Chinese Journal of Liquid Crystals and Displays 36(7):973-982(2021) DOI： 10.37188/CJLCD.2020-0344.

摘要

采用机械按键编程方式的直流稳压电源存在按键易磨损、电路构成复杂等问题。为解决上述问题，设计了一种基于STM32F7的可编程数字电源TFT液晶屏触摸显示系统。该系统的硬件由STM32F7处理器、TFT液晶触摸屏、SDRAM芯片、电源模块组成，STM32F7用于驱动TFT液晶屏，并通过LTDC扩展外部SDRAM作为显存，电源模块为显示屏提供背光电压。软件利用FreeRTOS实时操作系统管理调度系统任务，并利用emWin进行图形界面设计，采用DMA方式读取数据。该显示系统电路简单，显示性能稳定可靠，可对电源系统进行触摸控制。实验结果表明：该系统显示效果清晰，控制响应快，能对电源系统进行实时控制和监测显示。该系统利用TFT触摸屏实现了可编程电源的人机交互功能，为TFT触摸屏在电源领域的应用提供了参考。

Abstract

The direct current regulated power supply adopting the mechanical buttons programming mode has problems, such as easy wear of buttons and complex circuit composition. To solve the above problems, a system is designed with the programmable digital power supply TFT liquid crystal display (LCD) screen touch display based on STM32F7. In terms of the hardware of the system, it is composed of an STM32F7 processor, TFT LCD touch screen, SDRAM chip, and power supply module. STM32F7 is used to drive TFT LCD screen and to expand external SDRAM as video memory through LTDC, and the power supply module provides backlight voltage power for the display screen. The software uses the real-time operating system of FreeRTOS for managing and dispatching system tasks, utilizes emWin for interface design, and adopts DMA pattern to read data. The display system has a simple circuit, stable and reliable display performance, and can control the power system by touching. The experimental results show that the system has a clear display effect, fast control and response. Additionally, the system realizes the human-computer interaction function of the programmable power supply by utilizing the TFT touch screen, thereby providing a reference for the application of the TFT touch screen in the power supply field.

关键词

TFT液晶触摸屏可编程数字电源显示人机交互FreeRTOS

Keywords

TFT LCD touch screenprogrammable digital power supplydisplayhuman machine interactionFreeRTOS

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