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jianpansshibie
- 4×4矩阵键盘识别处理,键盘处理程序的任务是:确定有无键按下,判断哪一个键按下,键的功能是什么;还要消除按键在闭合或断开时的抖动。两个并行口中,一个输出扫描码,使按键逐行动态接地,另一个并行口输入按键状态,由行扫描值和回馈信号共同形成键编码而识别按键,通过软件查表,查出该键的功能。 -4 × 4 matrix keyboard recognition processing, the keyboard handler task is: to determine whether
4matrixkeyboard
- AT89S51的并行口P1接4×4矩阵键盘,以P1.0-P1.3作输入线,以P1.4-P1.7作输出线;在数码管上显示每个按键的“0-F”序号。-AT89S51 the parallel port P1 then 4 × 4 matrix keyboard to P1.0-P1.3 as input lines to P1.4-P1.7 for output line in the digital control button displayed on each of the " 0-
dayinjikongzhi
- 说明,单片机应用,这是一个使用单片机的I/O口线控制微型打印机的实用程序,微型打印机为: 40针内含汉字库的并行接口点阵打印机,通过P0及P2口控制-, Microcontroller applications, this is a microcontroller I/O port line utility to control micro-printer, mini printer: 40-pin containing Chinese Characters parallel interface
COM2LPT
- AT89C2051针式打印机驱动模块,将2051串口接收到的数据转换后发送到连接打印机的并口上。-AT89C2051 dot matrix printer driver module, after the 2051 serial convert the received data is sent to the printer s parallel port connection.
printer
- 这是一个使用单片机的I/O口线控制微型打印机的实用程序。微型打印机为: 40针内含汉字库的并行接口点阵打印机。-This is a use of MCU I/O port line control utility for micro printer. Micro printer is: 40 needle is embedded with parallel interface of Chinese character dot matrix printer.