ucos arm programming through the ARM s rPDATC (low 4) and rPDATE (4 ~ 7-bit) expansion of 4 × 4 keyboard, the driver made by keys in HyperTerminal and LCD screen to display the corresponding key (not with the operating system for display in the HyperTerminal).

Exp4_1
......\Debug
......\Exp4_1.apj
......\Exp4_1.IAB
......\Exp4_1.IAD
......\Exp4_1.IMB
......\Exp4_1.IMD
......\Exp4_1.PFI
......\Exp4_1.PO
......\Exp4_1.PR
......\EXP4_1.PRI
......\Exp4_1.PS
......\Exp4_1.WK3
......\INC
......\...\44BLIB.H
......\...\DEF.H
......\...\KeyBoard16.h
......\Release
......\SRC
......\...\44BLIB.C
......\...\44BLIB_A.S
......\...\KeyBoard16.c
......\...\Main.c

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