登录
首页 » SCM » 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...

于 2022-03-09 发布 文件大小:2.10 kB
0 133
下载积分: 2 下载次数: 1

代码说明:

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.

下载说明:请别用迅雷下载,失败请重下,重下不扣分!

发表评论

0 个回复

  • dds digital frequency synthesis principle simulation program, download, will be...
    dds 数字频率合成原理仿真程序,下载后,将后缀改为.m即可-dds digital frequency synthesis principle simulation program, download, will be replaced by the suffix. m can
    2022-12-29 09:20:02下载
    积分:1
  • Electronic code lock procedure, the two key input, one key additive, and the oth...
    电子密码锁程序,两键输入,其中一个键累加,另一个键确认。密码正确锁打开(开锁指示灯亮);密码错误锁关闭(关锁指示灯亮);连续错三次则锁定键盘8秒并发出报警声。-Electronic code lock procedure, the two key input, one key additive, and the other button to confirm. The correct password to open lock (unlock indicator light) password error lock closure (Kuan-lock indicator light) consecutive wrong then lock the keyboard three times and issued eight seconds alarm sound.
    2022-03-14 01:00:18下载
    积分:1
  • 51 on the RTOS, the RTOS non
    51上的RTOS,该RTOS为非占先式多任务操作系统,如果用户任务的最长执行时间小于 系统节拍时间,则本MiniRTOS要优于占先式TOS。因为本MiniRTOS占用资源小,RAM不超过20字节,程序空间只占为600多字节。-51 on the RTOS, the RTOS non-preemptive multitasking operating system, if the user of the longest task execution times smaller than system beats time, it is superior to the MiniRTOS Preemptive 200040. Because of the small resources MiniRTOS occupation, RAM no more than 20 bytes, procedures only for the space of more than 600 bytes.
    2022-03-04 12:07:54下载
    积分:1
  • Complete electric vehicle anti
    完整的电动车防盗报警器源码,单片机:EMC78P153S,源码注释清晰-Complete electric vehicle anti-theft alarm source, Microcontroller: EMC78P153S, Notes of a clear source
    2022-01-21 01:43:51下载
    积分:1
  • 中央空调控制器全套资料,包含所有开发文档,喜欢的请速度!...
    中央空调控制器全套资料,包含所有开发文档,喜欢的请速度!-A full set of information on central air-conditioning controller, including all development documents, like the speed please!
    2022-01-28 04:17:07下载
    积分:1
  • SCM control and processing of external infrared remote control signal, the remot...
    单片机控制和处理外部红外遥控信号,实现单片机的遥控功能,适用于一般家庭使用和电子竞赛-SCM control and processing of external infrared remote control signal, the remote control MCU functions applicable to general family use and electronic competition
    2022-09-15 01:05:03下载
    积分:1
  • ARM芯片的GPIO _克驱动器
    arm lpc2132 driver for GPIO_KeyIn
    2022-11-12 12:45:03下载
    积分:1
  • Single
    单片机红外遥控试用程序,红外接收头测试烧写文件。-Single-chip infrared remote control trial procedures, the first test infrared receiver programmer documentation.
    2022-01-24 15:18:00下载
    积分:1
  • 平凡老师的单片机c语言教程对于初学者入门很有帮助
    平凡老师的单片机c语言教程对于初学者入门很有帮助-ordinary teacher SCM c language tutorial for beginners entry helpful
    2022-05-18 14:03:26下载
    积分:1
  • 用汇编语言实现数据采集,数据显示,数据通信(2543,7279等芯片),是我做的毕设题目...
    用汇编语言实现数据采集,数据显示,数据通信(2543,7279等芯片),是我做的毕设题目-assembly language for data acquisition, data, data communications (2543,7279 chip), I do BI located topic
    2022-03-29 20:31:31下载
    积分:1
  • 696516资源总数
  • 106914会员总数
  • 0今日下载