Screen refresh method and computer-readable storage medium

Abstract

The invention discloses a method for swiping screens and a computer-readable storage medium. The method for swiping screens includes the following steps: a display engine reads display data from a DRAM, and converts them into timing control signals and parallel data output; a QSPI interface receives the timing control After the signal and the parallel data are converted into an on-screen display signal for output; after receiving the on-screen display signal, the display device feeds back a synchronous signal TE to the display engine to trigger a screen refresh action. According to the swiping method of the present invention, the entire swiping process is implemented by hardware, without taking up a large amount of CPU resources, and will not cause frame loss problems due to the need to wait for the CPU to respond; utilize the TE synchronization signal fed back by the display device to request Feedback a TE signal when sending data to refresh the screen, triggering the display engine to start refreshing the screen, achieving a fixed timing refresh screen, which can solve the phenomenon of screen tearing.

Description

technical field [0001] The present invention relates to the technical field of screen display, in particular to a screen swiping method and a computer-readable storage medium. Background technique [0002] The traditional way of refreshing the screen is to refresh the screen through 4 SPI (Serial Peripheral Interface, Serial Peripheral Interface) data lines. This method uses the SPI interface to use CPU instructions to operate the screen refreshing process, which has the following shortcomings: [0003] (1) When the CPU is needed to trigger the screen refresh action, there may be insufficient system resource allocation, and it is too late to respond, resulting in frame loss; [0004] (2) The screen refresh is triggered by the CPU, the timing is not completely fixed, and the interval between frames is offset, which will lead to unsmooth phenomena in dynamic images, especially video playback; [0005] (3) For the display screen with buffer (buffer), there will be screen teari...

AI Technical Summary

Problems solved by technology

[0003] (1) When the CPU is needed to trigger the screen refresh action, there may be insufficient system resource allocation, and it is too late to respond, resulting in frame loss;

[0004] (2) The screen refresh is triggered by the CPU, the timing is not completely fixed, and the interval between frames is offset, which will lead to unsmooth phenomena in dynamic images, especially video playback;

[0005] (3) For the display screen with buffer (buffer), there will be screen tearing phenomenon due to the non-synchronous mechanism of buffer writing and reading

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