一个4X4的键盘程序设计，希望能对大家有一定的帮助

本库函数实现了C8051F020 SMBUS总线的驱动 简洁规范的代码风格以及简单易用的接口不堪为一经典之作

Microchip Technology Inc. 的HCS300 是一款跳码编码 器，它是专为安防遥控无钥门禁（RKE）系统而设计 的。 HCS300使用KEELOQ跳码技术，并具有安全性高、 封装尺寸小和成本低等特性。 HCS300 是单向遥控无钥 门禁系统和访问控制系统最完美的解决方案。-The HCS300 from Microchip Technology Inc. is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS300 utilizes the KEELOQ code hopping technology, incorporating high security, a small package outline and low cost. The HCS300 is a perfect solution for unidirectional remote keyless entry systems and access control systems.via any external connection. The EEPROM data is pro-grammable but read-protected. 2006 Microchip Technology Inc.

John Catsoulis编写的Designing Embedded Hardware 。介绍了汇编语言，SPI,I2C,串口，usb,网口等硬件电路设计。模拟电路设计，AVR单片机原理-John Catsoulis prepared Designing Embedded Hardware. Introduction of assembly language, SPI, I2C, serial, usb, network hardware such as circuit design of the mouth. Analog circuit design, AVR Singlechip Principle

这是arm92440的脉宽调制（pwm） 适合初学者使用-Arm92440 This is the pulse width modulation (pwm) Suitable for beginners to use

键盘可以直接接在单片机上，实现标准pc键盘的使用-Keyboard can be directly connected to the single-chip microcomputer, the realization of the use of standard pc keyboard

用于Rabbit写Flash设备ID的程序-Rabbit write for Flash device ID procedures

CM12864驱动程序 ARM控制LCD显示数字还有屏幕保护功能，此程序最大的特点就是CM12864的驱动，非常有用。-CM12864 driver ARM control LCD screen display digital still function, this procedure is characterized by the largest CM12864 driver, very useful.

ds18b20数字温度计设计 ds18b20数字温度计设计 -DS18B20 design DS18B20 digital thermometer digital thermometer digital thermometer design design DS18B20

test ili9320 for keil c

pc端usb下载程序DNW的源代码，配合开发板usbd程序可以实现pc和开发板互通-usb client pc download the source code of DNW, with the development board can USBD pc and realize mutual development board