基于altera FPGA的多功能数字钟程序，但是不是简单的数字钟，还支持VGA图形化钟表显示，并且有鼠标，键盘，温度显示等等功能。-Altera FPGA based multi-functional digital clock program, but not a simple digital clock, timepiece also supports VGA graphics display, and there is a mouse, keyboard, temperature dis