Touch screen control system based on ARM and FPGA and control method

Abstract

The invention provides a touch screen control system based on an ARM and an FPGA and a control method. The touch screen control system includes a communication module, a microprocessor module, a liquid crystal touch screen control module and a liquid crystal touch screen which are connected in sequence; a hardware layer of the microprocessor module adopts an STM32F407 micro controller; the liquidcrystal touch screen control module adopts an FPGA chip and includes a data interaction module, a video memory module, a liquid crystal display module and a touch control module; the microprocessor module is in communication connection with the data interaction module; the data interaction module and the video memory module are in communication connection with the touch control module, the video memory module is in communication connection with the liquid crystal display module, and the liquid crystal display module and the touch control module are in communication connection with the liquid crystal touch screen. By the adoption of the touch screen control system based on the ARM and the FPGA and the control method, under the condition of not changing a drive, a hardware acceleration function of the system and the real-time display and touch functions of liquid crystal display screens with different resolutions can be achieved.

Description

technical field [0001] The invention relates to the field of liquid crystal touch screens, in particular to a touch screen control system and control method based on ARM and FPGA. Background technique [0002] There are three kinds of commonly used liquid crystal display controllers: independent control device, microprocessor (ARM) embedded liquid crystal display controller and Nios II soft-core controller. [0003] The chips used in the independent control device mainly include RA8875, SSD1963 and ILI9320, etc., and the realization scheme is convenient and simple. The hardware circuit of the ARM-embedded liquid crystal display controller solution is simple and convenient to control. The advantage of using the Nios II soft-core controller solution is to enhance the portability of the controller. [0004] Among them, the chips used by the independent control device mainly include RA8875, SSD1963 and ILI9320, etc. RA8875 and SSD1963 support a maximum of 800pixel×480pixel 24-...

AI Technical Summary

Problems solved by technology

Therefore, there are defects such as limited support resolution, strong specialization, and high cost in the application.

[0005] ARM-embedded liquid crystal display controller scheme is adopted. Since all drivers and data processing are implemented based on ARM, ARM has a heavy workload and a limited display frame rate.

[0006] Due to the limited performance of the Nios II soft core, the frame rate of the liquid crystal display is limited. If the display performance is improved, a field programmable gate array (FPGA) chip with higher performance needs to be replaced, which increases the design cost

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