Through FPGA receive the ps2 keyboard data, and then receive the letters from A to Z key value into corresponding ASII code, through A serial port sent to the PC. Experiment, the need to connect the keyboard, with debugging assistant, download the program, press A key on keyboard, such as A, is can be seen in the PC debugging assistant in A

10_ps2_keyboard_test
....................\db
....................\..\logic_util_heursitic.dat
....................\..\prev_cmp_ps2_key.asm.qmsg
....................\..\prev_cmp_ps2_key.fit.qmsg
....................\..\prev_cmp_ps2_key.map.qmsg
....................\..\prev_cmp_ps2_key.qmsg
....................\..\prev_cmp_ps2_key.tan.qmsg
....................\..\ps2_key.db_info
....................\..\ps2_key_global_asgn_op.abo
....................\incremental_db
....................\..............\compiled_partitions
....................\..............\...................\ps2_key.db_info
....................\..............\...................\ps2_key.root_partition.cmp.cdb
....................\..............\...................\ps2_key.root_partition.cmp.dfp
....................\..............\...................\ps2_key.root_partition.cmp.hdb
....................\..............\...................\ps2_key.root_partition.cmp.kpt
....................\..............\...................\ps2_key.root_partition.cmp.logdb
....................\..............\...................\ps2_key.root_partition.cmp.rcfdb
....................\..............\...................\ps2_key.root_partition.map.cdb
....................\..............\...................\ps2_key.root_partition.map.dpi
....................\..............\...................\ps2_key.root_partition.map.hbdb.cdb
....................\..............\...................\ps2_key.root_partition.map.hbdb.hb_info
....................\..............\...................\ps2_key.root_partition.map.hbdb.hdb
....................\..............\...................\ps2_key.root_partition.map.hbdb.sig
....................\..............\...................\ps2_key.root_partition.map.hdb
....................\..............\...................\ps2_key.root_partition.map.kpt
....................\..............\README
....................\my_uart_tx.v
....................\my_uart_tx.v.bak
....................\ps2scan.v
....................\ps2scan.v.bak
....................\ps2_key.asm.rpt
....................\ps2_key.cdf
....................\ps2_key.done
....................\ps2_key.fit.rpt
....................\ps2_key.fit.smsg
....................\ps2_key.fit.summary
....................\ps2_key.flow.rpt
....................\ps2_key.map.rpt
....................\ps2_key.map.summary
....................\ps2_key.pin
....................\ps2_key.pof
....................\ps2_key.qpf
....................\ps2_key.qsf
....................\ps2_key.sof
....................\ps2_key.sta.rpt
....................\ps2_key.sta.summary
....................\ps2_key.tan.rpt
....................\ps2_key.tan.summary
....................\ps2_key.v
....................\ps2_key.v.bak
....................\ps2_key_assignment_defaults.qdf
....................\speed_select.v
....................\speed_select.v.bak

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