文件名称:66KeyLock
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- 上传时间：2012-11-16
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文件大小：54.14kb
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此题目是通过键盘来实现密码输入是否正确，正确的时候数码管亮，否则发出报警声。
判断是按键还是干扰是非常有用的，它体现了一个系统的抗干扰能力。高低电平在瞬间的变换是很正常的，如果没有这条语句，系统很容易出错。
其中2秒是由定时器0来完成的。
在程序的定时器中断中，用switch代替了if else结构，使得程序的可读性大大增强。
TH0 = (65536-50000) / 256
TL0 = (65536-50000) 256 使得TH0 = 3CH, TL0 = B0H,由于该单片机的晶振为12MHz 因此定时时间就为0.05ms.在定时器中断服务程序中用FLASH计数，当计数达到40时正好是2秒。-This topic is through the keyboard to realize the correct password is correct, when GuanLiang digital alarm sound, otherwise.
Judgment is a key or interference is very useful, it reflects the anti-interference ability of a system. High level in the instant transformation is very normal, if not this statement, the system is very easy to make a mistake.
2 seconds is accomplished by the timer 0.
In the process of the timer interrupt, switch with replaced if else structure, make the readability of the procedures enhanced greatly.
TH0 = (65536-50000)/256,
TL0 = (65536-50000) 256, Make TH0 3CH, TL0 = = B0H, because the MCU crystals for 12MHz, So regularly time is 0.05 ms in timer interrupt service routines, when using FLASH counting 40 count when exactly 2 seconds.
判断是按键还是干扰是非常有用的，它体现了一个系统的抗干扰能力。高低电平在瞬间的变换是很正常的，如果没有这条语句，系统很容易出错。
其中2秒是由定时器0来完成的。
在程序的定时器中断中，用switch代替了if else结构，使得程序的可读性大大增强。
TH0 = (65536-50000) / 256
TL0 = (65536-50000) 256 使得TH0 = 3CH, TL0 = B0H,由于该单片机的晶振为12MHz 因此定时时间就为0.05ms.在定时器中断服务程序中用FLASH计数，当计数达到40时正好是2秒。-This topic is through the keyboard to realize the correct password is correct, when GuanLiang digital alarm sound, otherwise.
Judgment is a key or interference is very useful, it reflects the anti-interference ability of a system. High level in the instant transformation is very normal, if not this statement, the system is very easy to make a mistake.
2 seconds is accomplished by the timer 0.
In the process of the timer interrupt, switch with replaced if else structure, make the readability of the procedures enhanced greatly.
TH0 = (65536-50000)/256,
TL0 = (65536-50000) 256, Make TH0 3CH, TL0 = = B0H, because the MCU crystals for 12MHz, So regularly time is 0.05 ms in timer interrupt service routines, when using FLASH counting 40 count when exactly 2 seconds.
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下载文件列表
66 Key Lock/Key Lock (2)
66 Key Lock/Key Lock (2).asm
66 Key Lock/Key Lock (2).DSN
66 Key Lock/Key Lock (2).hex
66 Key Lock/Key Lock (2).lnp
66 Key Lock/Key Lock (2).LST
66 Key Lock/Key Lock (2).M51
66 Key Lock/Key Lock (2).OBJ
66 Key Lock/Key Lock (2).Opt
66 Key Lock/Key Lock (2).plg
66 Key Lock/Key Lock (2).PWI
66 Key Lock/Key Lock (2).Uv2
66 Key Lock/Key Lock (2)_Opt.Bak
66 Key Lock/Key Lock (2)_Uv2.Bak
66 Key Lock/Last Loaded Key Lock (2).DBK
66 Key Lock/new66.c
66 Key Lock/new66.LST
66 Key Lock/new66.OBJ
66 Key Lock
66 Key Lock/Key Lock (2).asm
66 Key Lock/Key Lock (2).DSN
66 Key Lock/Key Lock (2).hex
66 Key Lock/Key Lock (2).lnp
66 Key Lock/Key Lock (2).LST
66 Key Lock/Key Lock (2).M51
66 Key Lock/Key Lock (2).OBJ
66 Key Lock/Key Lock (2).Opt
66 Key Lock/Key Lock (2).plg
66 Key Lock/Key Lock (2).PWI
66 Key Lock/Key Lock (2).Uv2
66 Key Lock/Key Lock (2)_Opt.Bak
66 Key Lock/Key Lock (2)_Uv2.Bak
66 Key Lock/Last Loaded Key Lock (2).DBK
66 Key Lock/new66.c
66 Key Lock/new66.LST
66 Key Lock/new66.OBJ
66 Key Lock
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