这是一份Ｉ２Ｃ数据传输程序．自己写的，有识之士看看，

IO口模拟串口，c语言编写，使用一个定时器中断-Serial IO mouth simulation, c language, the use of a timer interruption

SDU的字库，主要包垮一些程序代码，很好用的，希望对大家有用-SDU

Floating point library for the 8052.

72段LCD驱动器SD0418的测试程序-72 LCD drive SD0418 test procedures

SST89C54/SST89C58单片机的IAP在线编程功能,如何使用FLASH寄存器对内部FLASH的操作-SST89C54/SST89C58 does the monolithic integrated circuit IAP on-line programming function, how use the FLASH register for the internal FLASH operation

采用8位LED动态扫描时钟演示程序 使用12MHZ晶振，P0口输出段码，P2口作列扫描，用共阳LED数码管-Using 8-bit LED Dynamic scan demo program using the 12Mhz clock crystal, P0 port output above code, P2 I make out scanning, with a total of Yang LED digital tube

4对于进入密码锁的钥匙，假设复位后8个LED全亮，并使用sw1、sw2两个，然后sw2-> sw1-> sw1-> sw2，则表示解锁右侧会导致8个LED全暗。

software MPLAB... writing program (coding .c/.h) -software MPLAB... writing program (coding .c/.h)

单片机与温度传感器的应用，很多错的。请大家踊跃下载啊。-SCM and temperature sensor applications, a lot of wrong. Please download ah enthusiastically.

MCS-51单片机有5个中断源，其中两个是由-INT0、-INT1引脚输入的外部中断源；另外三个是内部中断源即由T0、T1的溢出引起中断和串行口发送完一个字节或接收到一个字节数据引起中断。触发外部中断有两种方式，即下降沿引起中断或低电平引起中断。当编程TCON中的ITi（i=0、1）为1时，则引起触发的方式为边沿触发方式，反之(ITi=0)为低电平触发方式。每个中断源的中断请求能否得到响应要受两级“开关”的控制，即一个总“开关”-MCS-51 single-chip has five interrupt sources, two of which are by-INT0,-INT1 pin input external interrupt source the other three internal interrupt sources from the T0, T1 overflow caused by the disruption and serial port sending or receiving end of a byte to a byte of data caused by interruption. Triggered external interrupt has two modes, namely, falling edge or low-level disruption caused disruption caused. When programming TCON in ITi (i = 0,1) for the 1:00 has been the subject of a way to trigger the way to the edge of the trigger, on the contrary (ITi = 0) for low-level trigger mode. Each interrupt source interrupt request can be subject to levels in response to