In SCM to achieve agreement OBD modulation and demodulation, used car OBD testin...

51单片机矩阵键盘的设计与调试，建议使用52单片机。-51 Single-chip design of the keyboard matrix and debugging, it is recommended to use single-chip microcomputer 52.

AT8091 C51 4*4键盘 程序例子，配电路图-AT8091 C51 4*4 Keyboard example

ADC0809是带有8位A/D转换器、8路多路开关以及微处理机兼容的控制逻辑的CMOS组件。它是逐次逼近式A/D转换器，可以和单片机直接接口。 -ADC0809 is an 8-bit A/D converter, 8-way multi-switch and microprocessor compatible control logic of the CMOS components. It is a successive approximation type A/D converter, single chip can interface directly.

本模拟I2C软件包包含了I2C操作的底层子程序，使用前要定义好SCL和SDA。在标准8051模式(12 Clock)下,对主频要求是不高于12MHz-The simulation package includes I2C bottom I2C operation subroutine, before the definition of a good use of SCL and SDA. 8051 in standard mode (12 Clock), the requirements for the frequency is higher than 12MHz

基于单片机的USB设计方案，该方案包括了电路原理图、PCB布局图、单片机端的源程序和PC端的USB调试助手，该方案内容详尽。-USB single-chip design based on the Program, which includes the circuit schematic, PCB layout, Microcontroller and PC client-side source code of the USB debugging aides, the program detailed.

伟福 WAVE6000 环境下 MCS51汇编调用C51例程-Wei Fu WAVE6000 environment MCS51 compilation called C51 routines

串口测试程序，当收到一个数据时会返回一个同样的数据-Serial test procedure, when a data received will be a return of the same data

51单片机浮点数运算子程序及IEEE和51浮点数相互转换程序 -51 floating-point operations and subroutine IEEE floating point and 51 mutual conversion

这是一个步进电机调速的程序，可以完成100级的调速。-This is a stepper motor speed control procedures, to be completed 100 of the governor.

Keil C51 example