A Design Method of High Speed ​​and Variable Frame Video Memory Based on FPGA

Abstract

The invention discloses an FPGA (Field Programmable Gate Array) high-speed variable-frame video memory design method. The method comprises the following steps: starting to send video source data through a video source end; initializing a DDR (Double Data Rate) storage; receiving the data through the front-end asynchronous FIFO (First In First Out); writing the data of the front-end asynchronous FIFO in the DDR storage while the data size cached by the front-end asynchronous FIFO reaches a threshold; reading data to a rear-end asynchronous FIFO through the DDR storage while the data stored in the DDR storage reaches a frame; starting a dot-screen module to send the data into a screen while the data size in the rear-end asynchronous FIFO reaches the threshold, wherein the storage address space in the DDR storage is divided into three areas according to the size of a single-frame image, wherein the three areas are respectively marked as A, B and C; operating a DDR controller to control the read-write operation of the DDR storage to be alternatively performed once among the areas A, B and C. The method has the advantages that various video signals can be flexibly processed, like caching, efficient transmission and frame varying.

Description

technical field [0001] The invention relates to an FPGA-based high-speed, variable-frame video memory design method. Background technique [0002] Field programmable logic device FPGA has been widely used in various engineering designs with its high-speed processing speed and flexible design methods, and DDR memory, as a functional module under the FPGA platform, makes it in video Great progress has been made in video memory solutions. With the rapid development of electronic technology, the functions of display devices are becoming more and more diversified, and the amount of information transmitted is also increasing. The previous video memory design schemes are difficult to meet the diverse functional requirements of today, and FPGA with its high-speed , flexible design, is catering to this development needs. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, providing a kind of FPGA-based high-spe...

AI Technical Summary

Problems solved by technology

With the rapid development of electronic technology, the functions of display devices are becoming more and more diversified, and the amount of information transmitted is also increasing. The previous video memory design schemes are difficult to meet the diverse functional requirements of today, and FPGA with its high-speed , flexible design, just cater to this kind of development needs

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