为了适应嵌入式系统显示终端的图形显示应用需要,提出了一种通用的VGA波形显示系统.依据VGA的显示原理,该系统FPGA内部集成A/D控制模块、双口RAM模块和VGA显示控制模块,利用双口RAM完成了采集数据的缓存,通过VGA显示控制模块读取缓存数据,产生标准的VGA控制时序信号,实现数据的图形显示.测试结果表明:基于FPGA的波形显示系统能够产生正确的VGA接口时序,完成波形数据的稳定显示.该系统具有自主知识产权核,方便移植,为基于FPGA的嵌入式可视化终端提供一种较好的解决方案.
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