Abstract

In this paper, we propose a design of an embedded system which based on CPLD (Complex Programmable Logic Device) and only one chip of SRAM (Static RAM) in order to acquire and display the images real-time. The system uses Omni Vision’s CMOS color image sensor OV7725 as the image acquisition chip and a 5.6-inch TFT-LCD (Thin Film Transistor Liquid Crystal Display), 18bit (RGB666) colors with resolution of 640 × 480 pixels, to display the images real-time, and the device of CPLD (EPM7160E) to control the timing, image format conversion, and TFT-LCD drive signal. At the same time the embedded system use one chip of SRAM as a cache memory to save an image quickly. The experimental results show that the system designed, with high practical value but less hardware, is easy to capture and display the images stably.

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