4* 4 keyboard keys to read and display program on the seven-segment LED       The keyboard schematics four row lines are connected to the column lines PH0 ~ 3,4 respectively connected to PH4 ~ 7. Row lines connected to I/O port as an output MCU, the column lines connected to the I/O port is used as input MCU. When did When a button is pressed, all inputs are high. When a button is pressed to enter the break with progressive scan method to determine the location of the key.

S12X-键盘与数码显示_CW工程源代码\key_display1\bin\Project.abs
................................\............\...\Project.abs.glo
................................\............\...\Project.abs.s19
................................\............\...\Project.map
................................\............\cmd\TBDML_Erase_unsecure_hcs12xe.cmd
................................\............\...\TBDML_Postload.cmd
................................\............\...\TBDML_Preload.cmd
................................\............\...\TBDML_Reset.cmd
................................\............\...\TBDML_Startup.cmd
................................\............\...\TBDML_Vppoff.cmd
................................\............\...\TBDML_Vppon.cmd
................................\............\C_Layout.hwl
................................\............\Default.mem
................................\............\key_display1.mcp
................................\............\............_Data\CWSettingsWindows.stg
................................\............\.................\Standard\ObjectCode\datapage.c.o
................................\............\.................\........\..........\main.c.o
................................\............\.................\........\..........\MC9S12XS128.c.o
................................\............\.................\........\..........\Start12.c.o
................................\............\.................\........\TargetDataWindows.tdt
................................\............\prm\burner.bbl
................................\............\...\Project.prm
................................\............\Sources\datapage.c
................................\............\.......\derivative.h
................................\............\.......\main.c
................................\............\.......\Start12.c
................................\............\TBDML.ini
................................\............\key_display1_Data\Standard\ObjectCode
................................\............\.................\Standard
................................\............\bin
................................\............\cmd
................................\............\key_display1_Data
................................\............\prm
................................\............\Sources
................................\key_display1
S12X-键盘与数码显示_CW工程源代码

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