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按键扫描 51单片机加8279
8279通过74LS 138译码器扩展4×4键盘、6位显示器。
由3...
按键扫描 51单片机加8279
8279通过74LS 138译码器扩展4×4键盘、6位显示器。
由3-8译码器对SL0~SL2译出键扫描线,由另一3-8译码器译出显示器的位扫描线,并采用了编码扫描方式。
为了防止出现重键现象,扫描输出线高位SL3不参加键扫描译码。CPU对8279的监视采用了查询方式,故8279的中断请求信号IRQ悬空未用。
-Scan button 82,798,279 plus 51 single-chip decoder 74LS 138 through the expansion of 4 × 4 keyboard, the display 6. From 3-8 decoder SL0 ~ SL2 translated to the key scanning line, by another 3-8 decoder translated display scan line, and uses code scanning. In order to prevent the emergence of the phenomenon of re-key, scan the output line does not take part in high level SL3 scan decoding keys. CPU on the 8279 surveillance using the query mode, the 8279 interrupt request signal IRQ left unused.
- 2022-03-09 10:15:53下载
- 积分:1
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ATmega16应用例子,实验教材,包括内核及主板相关实验和外围模块相关实验。...
ATmega16应用例子,实验教材,包括内核及主板相关实验和外围模块相关实验。-ATmega16, experimental materials, motherboard including core and related experiments and experiments related to external modules.
- 2022-12-30 23:30:09下载
- 积分:1
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本程序是并口FLASH 39sf040读写程序,并给出调用函数.
本程序是并口FLASH 39sf040读写程序,并给出调用函数.-This procedure is a parallel port to read and write FLASH 39sf040 procedures, and gives call function.
- 2022-06-29 05:05:57下载
- 积分:1
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这是用iar环境编译的程序,
主要适用于msp430f149单片机
程序的内容是模拟比较器。
这是用iar环境编译的程序,
主要适用于msp430f149单片机
程序的内容是模拟比较器。-This is used to compile the procedure iar environment, mainly applicable to MSP430F149 single-chip process is the analog comparator.
- 2022-05-13 11:07:39下载
- 积分:1
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利用STC单片机实现软件模拟全双工串口的程序,只用一个定时器,消耗系统资源很少。...
利用STC单片机实现软件模拟全双工串口的程序,只用一个定时器,消耗系统资源很少。-using SCM software simulation of the full-duplex serial procedures, only a timer, depletion of scarce resources system.
- 2022-05-26 12:36:11下载
- 积分:1
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AVR系列的 C编程愿程序很实用,大家看看吧
AVR系列的 C编程愿程序很实用,大家看看吧-AVR Series C Programming is willing to procedures very useful, we look at it
- 2022-06-17 13:19:45下载
- 积分:1
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电磁兼容技术培训(杨济深教授讲课稿),这可是权威之作。是学习电磁兼容技术的工程师必学宝典。...
电磁兼容技术培训(杨济深教授讲课稿),这可是权威之作。是学习电磁兼容技术的工程师必学宝典。- Electromagnetic compatibility technology training (Professor
Yang Jishen teaches manuscript), this but work authority. Is engineer
which studies the electromagnetic compatibility technology must study
the precious book.
- 2022-05-29 19:24:45下载
- 积分:1
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AVR Microcontroller with the right of the spi clock chip DS1302 drive to read an...
用AVR单片机实现对时钟芯片DS1302的spi驱动,来读取和写入时间-AVR Microcontroller with the right of the spi clock chip DS1302 drive to read and write times
- 2022-02-04 21:05:02下载
- 积分:1
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模拟交通灯,并带有数字显示的程序。初始时全为红灯,显示“HELLO”字样。然后交通灯以“红绿、红黄、绿红、黄红”四种状态做循环,而且黄灯会闪烁,每种状态都带有到...
模拟交通灯,并带有数字显示的程序。初始时全为红灯,显示“HELLO”字样。然后交通灯以“红绿、红黄、绿红、黄红”四种状态做循环,而且黄灯会闪烁,每种状态都带有到数记时。当按下P3_2时,变成“红红”状态,并显示“STOP”字样!
-simulated traffic lights and figures with the procedure. When all of the initial red, shows that the "hello" words. Then traffic lights to the "black, red and yellow, green, red, yellow red" state to do four cycle, but the yellow light flashes, each state will have a few to remember when. When pressed P3_2, into a "red" state, and shows that the "STOP" word!
- 2022-01-26 03:16:31下载
- 积分:1
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430例程1:液晶显示,键盘扫描,数码关扫描显示等等,还有时钟程序...
430例程1:液晶显示,键盘扫描,数码关扫描显示等等,还有时钟程序-a 430 routines : LCD, keyboard scanning, digital scan revealed customs and so on, the clock procedures
- 2022-04-24 19:06:07下载
- 积分:1