进阶实验_08_PS2_01       ：接受标准键盘输入，通过串口打印到PC
.............................................................\Quartus
.............................................................\.......\db
.............................................................\.......\..\prev_cmp_PS2_UART.asm.qmsg
.............................................................\.......\..\prev_cmp_PS2_UART.fit.qmsg
.............................................................\.......\..\prev_cmp_PS2_UART.map.qmsg
.............................................................\.......\..\prev_cmp_PS2_UART.qmsg
.............................................................\.......\..\prev_cmp_PS2_UART.tan.qmsg
.............................................................\.......\..\PS2_UART.asm.qmsg
.............................................................\.......\..\PS2_UART.asm_labs.ddb
.............................................................\.......\..\PS2_UART.cbx.xml
.............................................................\.......\..\PS2_UART.cmp.bpm
.............................................................\.......\..\PS2_UART.cmp.cdb
.............................................................\.......\..\PS2_UART.cmp.ecobp
.............................................................\.......\..\PS2_UART.cmp.hdb
.............................................................\.......\..\PS2_UART.cmp.kpt
.............................................................\.......\..\PS2_UART.cmp.logdb
.............................................................\.......\..\PS2_UART.cmp.rdb
.............................................................\.......\..\PS2_UART.cmp.tdb
.............................................................\.......\..\PS2_UART.cmp0.ddb
.............................................................\.......\..\PS2_UART.cmp2.ddb
.............................................................\.......\..\PS2_UART.cmp_merge.kpt
.............................................................\.......\..\PS2_UART.db_info
.............................................................\.......\..\PS2_UART.eco.cdb
.............................................................\.......\..\PS2_UART.fit.qmsg
.............................................................\.......\..\PS2_UART.hier_info
.............................................................\.......\..\PS2_UART.hif
.............................................................\.......\..\PS2_UART.lpc.html
.............................................................\.......\..\PS2_UART.lpc.rdb
.............................................................\.......\..\PS2_UART.lpc.txt
.............................................................\.......\..\PS2_UART.map.bpm
.............................................................\.......\..\PS2_UART.map.cdb
.............................................................\.......\..\PS2_UART.map.ecobp
.............................................................\.......\..\PS2_UART.map.hdb
.............................................................\.......\..\PS2_UART.map.kpt
.............................................................\.......\..\PS2_UART.map.logdb
.............................................................\.......\..\PS2_UART.map.qmsg
.............................................................\.......\..\PS2_UART.map_bb.cdb
.............................................................\.......\..\PS2_UART.map_bb.hdb
.............................................................\.......\..\PS2_UART.map_bb.logdb
.............................................................\.......\..\PS2_UART.pre_map.cdb
.............................................................\.......\..\PS2_UART.pre_map.hdb
.............................................................\.......\..\PS2_UART.rtlv.hdb
.............................................................\.......\..\PS2_UART.rtlv_sg.cdb
.............................................................\.......\..\PS2_UART.rtlv_sg_swap.cdb
.........