学习C51时写的RS232通讯程序,提供给刚学单片机程序的朋友参考...

用于键盘扫描功能，适用与初学者，他是4*4键盘的扫描-For the keyboard scanning function, application and beginners, he was 4 * 4 keyboard scanning

常用EEPROM芯片的读写操作，51单片机控制电路，实验时要用74LS373一片，AT28C16一片，AT28C17一片，电路十分简单，根据实际电路联接情况，自行确定存储地址，最后别忘了还要8个LED和470欧姆电阻.-EEPROM chip used to read and write operations, 51 MCU control circuit, experiment, use 74LS373 1, AT28C16 1, AT28C17 1, the circuit is very simple, based on the actual situation of the circuit connectivity, self-determined memory addresses, finally do not forget to also 8 LED and 470 ohm resistors.

时钟程序,PCF8563时钟芯片程序，基于单片机开发环境-clock

源程序，及程序运行截图，以及详细的程序说明报告，-source, and running screenshots, and the detailed description of the procedures for reporting, thank you

8051核的DES源代码 使用C语言写的基于51核的DES原码，变量定义使用汇编。占用了130字节RAM，比我所见到的包括汇编编写的都要快。 -8051 nuclear DES use source code written in C language based on the 51 nuclear DES original code, the use of variable definition compilation. Occupy the 130 byte RAM, than I have seen in the preparation of the compilation must fast.

特点： 1． 双轴倾角传感器 2． 测量范围0.5g(±30 度)或者1g(±90 度) 3． 单极5V 供电，比例电压输出 4． 高分辨率双轴倾角传感器 5． 数字SPI 或模拟输出 6． 内置温度传感器 7． 长期稳定性非常好 8．高分辨率，低噪声，工作温度范围宽 优势： 长期稳定性好，温度特性优良 抗冲击能力强 应用： 双轴平台调平 倾斜测量 垂直方向的各种角度的测量-Features: 1. Biaxial inclination sensor 2. Measuring range of 0.5g (± 30 degrees) or 1g (± 90 degrees) 3. Unipolar 5V power supply, the ratio of voltage output 4. High-resolution dual-axis inclination sensor 5. SPI digital or analog output 6. Built-in temperature sensor 7. 8 very good long-term stability. High-resolution, low noise, wide operating temperature range of advantages: long-term stability, excellent temperature characteristics of the application of anti-shock capability: dual-axis tilt platform leveling vertical measurement range of the angle measurement

1602-LCD使用手册.内含有编程实例和1602的子程序.-1602-LCD user manual. Contains programming examples and the subroutine 1602.

数字频率调制又称频移键控（FSK），二进制频移键控记作2FSK。数字频移键控是用载波的频率来传送数字消息，即用所传送的数字消息控制载波的频率。2FSK信号便是符号“1”对应于载频，而符号“0”对应于载频（与不同的另一载频）的已调波形，而且与之间的改变是瞬间完成的。 -Digital frequency modulation called frequency shift keying (FSK), binary frequency shift keying recorded as 2FSK. Digital frequency-shift keying is the carrier frequency to transmit digital information, that is, the number of messages transmitted with the control of the carrier frequency. 2FSK signal is the symbol of "1" corresponds to the carrier frequency, while the symbol "0" corresponds to the carrier frequency (with a different carrier frequency to another) and modulated waveform, but also between the change was instantaneous.

这是用汇编语言编写的关于十进制表达式的程序！输入完表达式之后，按＂＝＂键结束输入！在我们检查的时候，老师说这个程序考虑的很周到，希望会对大家有用！-This is written in assembly language on the procedure decimal expression! End the importation of expression, according to the "=" key input end! We check the time, the teacher said this procedure is very thoughtful consideration, we would hope that useful!

微机原理8254与8255设计的手动跟自动的路灯控制系统-8254 8255