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ATT7022C的C语言程序，包含测量和校准程序(C ATT7022C language program, including measurement and calibration)

建立上位机与PLC之间的modbus（RTU）通讯。利用c#实现(Modbus established between PC and PLC (RTU) communication. Use c# achieve)

avrmega16的频率计源码，在2m以内误差为1-3hz，1602显示(avrmega16 the frequency of source, in less than 2m error 1-3hz, 1602 show)

积分器的一种实现方法：每级积分器都是一个反馈系数为1的单极点IIR滤波器, 其传递函数为:(An implementation of an integrator: each stage integrator is a single pole IIR filter with a feedback factor of 1:)

基于STM32F103利用SPI协议，RC522多功能读取，修改，删除卡片(Based on STM32F103 and SPI protocol, RC522 can read, modify and delete cards with multiple functions.)

说明：  STM32F1示波器基于STM32F1的一个简单的示波器，最大支持3.3v的电压，P1口作为输入。(Stm32f1 oscilloscopeA simple oscilloscope based on STM32F, with a maximum voltage of 3.3V and a P1 port as input.)

说明：  WK2124 SPI C51 测 试 程 序(WK2124 SPI C51 C test demo)

说明：  msp430的0.96寸的oled的驱动程序，已经调试过了。(The 0.96 inch OLED driver of MSP43 0 has been debugged.)

说明：  spi读取AT25128例程，全面解析底层，与I2C兼容。(The SPI reads AT25128 routines, comprehensively parses the underlying, and is compatible with I2C.)

This is an STM32 program for the CS43L22 Audio Codec.