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一个提取一个整数万位、千位、百位、十位、各位的快速算法-Tens of thousands of an extract of a whole, and 1000, 100, 10, that the fast algorithm

8051单片机上4*4矩阵键盘的扫描方式4-none

由8051组成的单片机系统通常情况下，P0口分时复用作为地址、数据总线，P2口提供A15-A8即高8位地址，P3口用作第二功能，只有P1口通常用作I/0口。P1口是8位准双向口，它的每一位都可独立地定义为输入或输出，因此既可作为8位的并行I/O口，也可作为8位的输入输出端。当工作在输入方式时，对应位的锁存器必须先置1,才能正确地读到引脚上的信号,否则,执行读引脚指令时,若对应位的锁存器的值为0，读的结果永远为0。-By 8051, composed of single-chip microcomputer system under normal circumstances, P0 timeshare I reuse as address, data bus, P2 I provide A15-A8 high eight address, P3 mouth for the second function, I usually only P1 for I/0 I. P1 I was eight quasi-two-way port, it can be independent of each and every defined as input or output, it can be used as 8-bit parallel I/O port, can also be used as 8-bit input and output side. When the work in the input, the corresponding bit latch must first buy one in order to correctly read the signal pin, or pin the implementation of reading instruction, if the corresponding bit latch the value of 0, Reading the results of Forever to 0.

T6963控制的240*128点阵液晶显示汉字程序-T6963 control of the 240* 128 dot-matrix liquid crystal display Chinese characters procedures

数字温度显示(带负温度),采用STC89C51单片机控制DS18B20-Digital temperature display (with negative temperature), the use of STC89C51 SCM DS18B20

USB转lpt 68013 驱动方案 USB转lpt 68013 驱动方案-Lpt 68013 Driver USB to USB transfer program lpt 68013 driver program

编程软件可心安装使用安装过程简便一看就会大可放心使用-Kexin programming software is simple to install using the installation process will be a look can be assured the use of

LED大屏幕显示系统的主要程序段 内包含几个主要的函数-LED large screen display system

philips单片机IAP读的源代码，使用c来调用-philips Singlechip IAP Reading the source code, use c to call