Realize the use of 51 single-chip 4* 4 keyboard scanning process in more than 51 platforms to verify, through

keylcd
......\4ledscan.h
......\htest
......\htest.c
......\htest.hex
......\htest.lnp
......\htest.LST
......\htest.M51
......\htest.OBJ
......\htest.Opt
......\htest.plg
......\htest.Uv2
......\htest_Opt.Bak
......\htest_Uv2.Bak
......\keyscan.h
......\LCD1602.h
......\ledscan
......\ledscan.c
......\ledscan.hex
......\ledscan.lnp
......\ledscan.LST
......\ledscan.M51
......\ledscan.OBJ
......\ledscan.Opt
......\ledscan.plg
......\ledscan.Uv2
......\ledscan2
......\ledscan2.c
......\ledscan2.hex
......\ledscan2.lnp
......\ledscan2.LST
......\ledscan2.M51
......\ledscan2.OBJ
......\ledscan2.Opt
......\ledscan2.plg
......\ledscan2.Uv2
......\ledscan2_Opt.Bak
......\ledscan2_Uv2.Bak
......\ledscan_Opt.Bak
......\ledscan_Uv2.Bak
......\ledtest
......\ledtest.c
......\ledtest.hex
......\ledtest.lnp
......\ledtest.LST
......\ledtest.M51
......\ledtest.OBJ
......\ledtest.Opt
......\ledtest.plg
......\ledtest.Uv2
......\ledtest_Opt.Bak
......\ledtest_Uv2.Bak
......\REG52.H

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