基于VHDL语言的4*4键盘驱动程序。带小数点，表示1000倍。带去高位无效零的4位数码管显示。-Based on 4* 4 keyboard driver VHDL language. With a decimal point, said 1000 times. Bring high void zero four digital display.

Vhdl编写的数码管驱动，动态7段码，FPGA实验板，Xilinx ISE实验环境-Vhdl write digital tube drive, dynamic 7-segment code, FPGA experimental board, Xilinx ISE experimental environment