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文件名称:dai
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1、利用实验台上提供的8279键盘电路,数码显示电路,设计一个电子钟,用小键盘控制电子钟的启停及初始值的预置。
电子钟显示格式如下:
XX.XX.XX由左向右分别为时、分、秒。
要求具有如下功能:
(1)、C键 清除,显示00.00.00;
(2)、G键 启动,电子钟计时;
(3)、D键:停止,电子钟停止计时;
(4)、P 键:设置初值;由左向右依次输入预置的时、分、秒值,同时应具有判断输入错误的能力,若输入有错,
则显示:E-----------
此时任击一键即显示:
00.00.00
敲P 键即可重新输入预置值。
(5)、E 键:程序退出,回到监控状态下。
-1, 8279 provided by the keyboard test bench circuits, digital display circuit, the design of an electronic clock, electronic clock with a small keyboard to control the start and stop and the preset initial value.
Clock display format is as follows:
XX. XX. XX, respectively, from left to right too, minutes, seconds.
Requires the following functions:
(1), C keys clear display 00.00.00
(2), G key start, electronic clock time
(3), D keys: Stop, stop the timing clock
(4), P key: Set the initial value from left to right followed by input preset hours, minutes and seconds value, and should have the ability to determine the input error, if the input is wrong,
Shows: E-----------
At this point hit a key which indicates that either:
00.00.00
Hit P key to re-enter the preset value.
(5), E key: program exit, back under control.
电子钟显示格式如下:
XX.XX.XX由左向右分别为时、分、秒。
要求具有如下功能:
(1)、C键 清除,显示00.00.00;
(2)、G键 启动,电子钟计时;
(3)、D键:停止,电子钟停止计时;
(4)、P 键:设置初值;由左向右依次输入预置的时、分、秒值,同时应具有判断输入错误的能力,若输入有错,
则显示:E-----------
此时任击一键即显示:
00.00.00
敲P 键即可重新输入预置值。
(5)、E 键:程序退出,回到监控状态下。
-1, 8279 provided by the keyboard test bench circuits, digital display circuit, the design of an electronic clock, electronic clock with a small keyboard to control the start and stop and the preset initial value.
Clock display format is as follows:
XX. XX. XX, respectively, from left to right too, minutes, seconds.
Requires the following functions:
(1), C keys clear display 00.00.00
(2), G key start, electronic clock time
(3), D keys: Stop, stop the timing clock
(4), P key: Set the initial value from left to right followed by input preset hours, minutes and seconds value, and should have the ability to determine the input error, if the input is wrong,
Shows: E-----------
At this point hit a key which indicates that either:
00.00.00
Hit P key to re-enter the preset value.
(5), E key: program exit, back under control.
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