在c8051f020上实现的crc校验程序，绝对原创

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.

介绍zlg7290的pdf，介绍得很详细，还有程序实例。-Introduction zlg7290 the pdf, very detailed introduction, there are instances.

c8051f020的pca频率输出，针对c8051f020的实验系统-err

数模转换，控制pwm波形输出，51单片机，C语言。-Digital-analog conversion, control pwm waveform output, 51 single-chip, C language.

AVR Programme is a SPI Example

I2C总线协议及其软件的实现，非常使用！！！！单片机用的-I2C bus protocol and software to achieve the very use! ! ! ! The MCU

嵌入式系统ucos如何移植到c51单片机，重点解释了局部变量的覆盖问题和函数的再入性问题。-Embedded System CENTER how to transplant c51 microcontroller, explained the focus of the coverage of local variables and function of reentry issues.

有关网络接口芯片RTL8019As论文，有助于这方面的开放-The network interface chip RTL8019As papers, help in this regard open

自己的51开发板源代码B，里面包含有LCD1602实验，lcd12864实验，ps2 lcd1602，串口通讯，红外遥控，计算器，继电器控制，矩阵键盘等实验程序，内容丰富-51 development board

pcf s I2C softpake ,form zlgmcu.com