使用PS2接口的键盘的小键盘输入，在12864液晶上显示出来，使用平台为CPLD或FPGA-PS2 keyboard interface to use a small keyboard input, in the 12864 liquid crystal display, use the platform for the CPLD or FPGA

ps2 keyboard with encoding ascii code to 7-segments screeen. LIBRARY ieee USE ieee.std_logic_1164.all USE ieee.std_logic_arith.all USE ieee.std_logic_unsigned.all ENTITY klawa IS PORT ( keyboard_clk, keyboard_data, clock_25MHz,

In this example w ill interface the PS/2 port to a PS/2 keyboard, also known as an AT keyboard. The example will not apply to the newer USB keyboards, or to the older, obsolete XT keyboard. Keyboards contain their own microprocessors that conti

采用VHDL这一简单实用的硬件描述语言，对常见的4*4键盘扫描显示作了简单的描述，重点是扫描、显示的原理过程，其中采用了很多的进程语句。-a very simple and common keyboard in laboratory,we use the specific hardware language,namely,the VHDL.we describle the specific working process.