FixedWidthTest

说明：  2015年电赛频率计，精密度高，简单易实现，双通道实现捕获(2015 frequency race frequency meter, high precision, easy to implement, dual channel capture)

说明：  一个和泰芯片上面用过的TM1638程序，一些初始化和显示，分固定地址和全写。(A TM1638 program used on Hetai chip, some initialization and display, divided into fixed address and full write.)

嵌入式I/O口实验程序，含有S3C2410的部分初始化，实现LED灯的暗和灭(Embedded I/O port the experimental procedure, which contains part of S3C2410 initialization, the realization of the dark and the LED lights out)

STM8 LED程序 演示程序，对入门者非常有用(STM8 LED program demonstration program, very useful for beginners)

基于STM32的DS3231参考工程 内含整个源码，工程为MDK的工程(DS3231 demo base on STM32)

说明：  STM32控制DDS输出正弦波等波形，频率幅值可调。(STM32 control DDS output sine wave waveform, adjustable frequency amplitude.)

说明：  测温矩阵传感器MLX90640的stm32移植版本，基于HAL库的硬件IIC驱动文件。(The STM32 porting version of mlx90640 is based on the hardware IIC driver file of Hal library.)

IIc应用，AT24C512初始化，清零，存储，读取多字节存入 写入多字节(IIc applications, initialization, clear, store, read, write more bytes into a multi-byte)

说明：  检测按键和电压,确定直流和交流电的有效值(Check key and voltage)

关于51单片机和dac7811芯片之间通信的程序，可以正确模拟SPI串口通信，写入数据(On communication between 51 single chip microcomputer and dac7811 chip procedures, can correctly simulate the SPI serial communication, write data )