51 SCM beginners write a few simple applications, including keyboard, buttons, and some other interrupt source. at89s52 test.

lesson1：单片机概述\JDQ\JDQ
...................\...\JDQ.c
...................\...\JDQ.hex
...................\...\JDQ.lnp
...................\...\JDQ.LST
...................\...\JDQ.M51
...................\...\JDQ.OBJ
...................\...\JDQ.Opt
...................\...\JDQ.plg
...................\...\JDQ.Uv2
...................\...\JDQ_Uv2.Bak
...................\LED\led8
...................\...\led8.c
...................\...\led8.hex
...................\...\led8.lnp
...................\...\led8.LST
...................\...\led8.M51
...................\...\led8.OBJ
...................\...\led8.Opt
...................\...\led8.plg
...................\...\led8.Uv2
...................\...\led8_Opt.Bak
...................\...\led8_Uv2.Bak
...................\shuma\shuma
...................\.....\shuma.c
...................\.....\shuma.hex
...................\.....\shuma.lnp
...................\.....\shuma.LST
...................\.....\shuma.M51
...................\.....\shuma.OBJ
...................\.....\shuma.Opt
...................\.....\shuma.plg
...................\.....\shuma.Uv2
...................\.....\shuma_Uv2.Bak
...................\.....1\shuma
...................\......\shuma.c
...................\......\shuma.hex
...................\......\shuma.lnp
...................\......\shuma.LST
...................\......\shuma.M51
...................\......\shuma.OBJ
...................\......\shuma.Opt
...................\......\shuma.plg
...................\......\shuma.Uv2
...................\......\shuma_Opt.Bak
...................\......\shuma_Uv2.Bak
...................\复件 LED\led8.c
...................\........\led8.hex
...................\........\led8.lnp
...................\........\led8.LST
...................\........\led8.M51
...................\........\led8.Opt
...................\........\led8.plg
...................\........\led8.Uv2
...................\........\led8_Opt.Bak
...................\........\led8_Uv2.Bak
......3：按键\key_duli\key_duli
.............\........\key_duli.c
.............\........\key_duli.hex
.............\........\key_duli.lnp
.............\........\key_duli.LST
.............\........\key_duli.M51
.............\........\key_duli.OBJ
.............\........\key_duli.Opt
.............\........\key_duli.plg
.............\........\key_duli.Uv2
.............\........\key_duli_Opt.Bak
.............\........\key_duli_Uv2.Bak
.............\....scan\key_scan
.............\........\key_scan.c
.............\........\key_scan.hex
.............\........\key_scan.lnp
.............\........\key_scan.LST
.............\........\key_scan.M51
.............\........\key_scan.OBJ
.............\........\key_scan.Opt
.............\........\key_scan.plg
.............\........\key_scan.Uv2
.............\........\key_scan_Opt.Bak
.............\........\key_scan_Uv2.Bak
.............\scan_key2\scan_key
.............\.........\scan_key.c
.............\.........\scan_key.hex
.............\.........\scan_key.lnp
.............\.........\scan_key.LST
.............\.........\scan_key.M51
.............\.........\scan_key.OBJ
.............\.........\scan_key.Opt
.............\.........\scan_key.plg
.............\.........\scan_key.Uv2
.............\.........\scan_key_Opt.Bak
.............\.........\scan_key_Uv2.Bak
.............\复件 key_scan\key_scan
.............\.............\key_scan.c
.............\.............\key_scan.hex
.............\.............\key_scan.lnp
.............\.............\key_scan.LST
.............\.............\key_scan.M51
.............\.............\key_scan.OBJ
.............\.............\key_scan.Opt

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