Keilc51和proteus环境下实现的0－50MHz的频率计。

IIC测试程序-IIC test procedures

这是个火车传感器的小程序，在某车厢里存放N个传感器，当某个传感器温度超过或者低于某个指定范围，系统发出警告。-This is a small sensor train procedures, in a vehicle storage N sensors, When a sensor temperature is over or below a certain designated areas, the system issued a warning.

用51写的旋转式编码器程序，可以让朋友们了解旋转式编码器的基础编程。-Written by 51 rotary encoder could offer my friends understand the rotary encoder based on programming.

单片机控制步进电机程序源码，希望能帮助到需要的朋友。-Single-chip stepper motor control program source code, hoping to help a friend in need.

atmel c5122 USB C51程序-ATMEL c5122 USB C51 procedures

单片机通过SPI读写SD卡.使用5v系统操作3.3V的sd卡.很有借鉴价值-SCM SPI literacy through SD cards. 5v use of the system 3.3V sd card. Very valuable reference

ADC7841 为12位4通道串行AD转换，本程序为SPCA061A为CPU 扩展ADC7841-ADC7841 for 12 4-channel serial AD converter, the procedures for SPCA061A for CPU expansion ADC7841

单片机的设计书籍（一些基础性的技术资料）本人从中也得益不少，不敢独享，发上来大家交流交流。-microcontroller design books (some of the basic technical information), I have benefited a lot from, not exclusive. fat onto the exchange of exchange.

usb转串口单片机固件程序，能实现usb-232的双向转换-usb to serial single-chip firmware, usb-232 to achieve the two-way conversion