Verilog语言的四乘四的键盘扫描程序。共阴共阳级数码管均能显示。-4 multiply 4 keyboard scan in FPGA

verilog function实现全组合逻辑乘法器电路，位宽可配置，高效-Function purely combined logic circuit to achieve the function of the multiplier, configurable bit width, high efficiency.