Design and Implementation of VGA Character Displaying System with FPGA

摘要

VGA is a standard industrial display interface. General Purpose Processor was usually used to control VGA interface to display characters and other information during the past. However, the architecture of General Purpose Processor is difficult to modify and also comparatively big, so it is not suitable for designing small devices. Instead, FPGA could be reconfigured, and also usually very small, so it is chosen to be used to control VGA for characters display. According to the principle of VGA display, this paper proposes a method of displaying coloured strip signals based on Xilinx Spartan-3, meanwhile, block RAM inside the FPGA is used to store the information of the characters for display. We have obtained a result as we predicted, get over the shortcomings of General Purpose Processor.