一个时时单片机发送数据测试代码

用AVR单片机实现BC7281的键盘控制，学会对7281与键盘的基本应用-AVR Microcontroller with BC7281 keyboard control, learn to keyboard 7281 and the basic application

俄罗斯方块，采用51单片机，c语言编制。能在大屏幕液晶下很好的玩转游戏。-Russian box, using 51 single-chip microcomputer, c language. Large-screen LCD in the next game Topsy good.

电子指南针与单片机通信-electronic compass and SCM Communications

关于单片机的按键程序,实现按一下,反应一次-Button on the SCM process, click the realization, the reaction time

keil c51的uv3集成开发环境安装软件。-keil c51 uv3 integrated development environment installs software.

[原创]PIC单片机完成格雷(Golay)编码的源码.-[original] PIC completed Gray (Golay) encoding the source.

芯片PCF8951共有四个A/D输入通道：AD0，AD1，AD2，AD3,分别与四个电位器(R1,R2,R3,R4)连接，用以调节电位器的输出电压。其中AD0通道既可测量电位器输出电压，也可用于测量从J1插座输入的外接电压，须用开关J2加以选择。J4插座提供由PCF8591输出的时钟方波信号。SAA1064驱动四个数码管显示一路AD转换后得到的数据。-PCF8951 chip, there are four A/D input channels: AD0, AD1, AD2, AD3, respectively, with four potentiometers (R1, R2, R3, R4) connected to regulate the output voltage potential. AD0 channel which can be measured potentiometer output voltage can also be used to measure the input from the J1 socket external voltage, to be used to select switch J2. J4 socket output from the PCF8591 clock square wave signal. SAA1064 drivers of four digital display along after AD conversion data.

通讯规则: 1:时钟7.3728 MHz/波特率9600/9个数据位/奇校验/1个停止位/硬件多机通讯功能/ 2:通讯连接采用硬件MAX485,双向单工 3:每个上行/下行的数据包的字节个数都是一样的(通讯数据量) 4:每个上行/下行的数据包都采用CRC8校验 5:数据接收采用中断+查询的方式 6:总是由主机向从机发送一个数据包,从机收到数据包后向主机回复一个数据包 7:不管是主机还是从机,如果收到的数据包有任何错误,都将丢弃该数据包,等效于没有接收 8:从机之间不能相互通讯,必须通过主机才能交换数据 9:无效地址是0,主机地址是1,从机地址是2.3.4......广播地址是255 -err

ad转换的例子 基于89C2051的电压采样程序-ad conversion based on the example of the voltage 89C2051 sampling procedures

通讯设置程序，主要是串口通讯子函数和控制数据流。-Communications setup program, mainly Serial Communication Function and control of data streams.