msi_7

很强的射频卡reader源代码，支持ISO14443A、ISO14443B等卡片，支持Mifare卡，desfire 4卡，内嵌入3DES算法(A strong source of RF card reader, support ISO14443A, ISO14443B such as card, Mifare card support, desfire 4 cards, embedded 3DES algorithm)

单片机用作通用红外遥控接收器的设计 PWM调制开关电源的研究 以电子电力学为核心 以整流技术为主(generic microcontroller for infrared remote control receiver design PWM switching power supply of electronic learning for power to the core technology-based rectifier)

通过相应的选择可以提取出正序、负序、零序的电压电流(Positive, negative and zero sequence voltage-current extraction module)

说明：  PC-单片机-PC，PC串口发数据-单片机串口接收数据-单片机将接收到的数据发送回给PC(PC-MCU-PC, PC Serial Port Send Data-MCU Serial Port Receive Data-MCU Send Received Data Back to PC)

这是KEYBOARD的C语言程序，详细介绍了KEYBOARD的编码和程序的实现方法，对读者有很大帮助！(This is the KEYBOARD C-language program, detailing procedures KEYBOARD coding and implementation method of great help to readers!)

蜂鸣器奏乐刘德华《练习》，根据不同的单片机可以调整延时。8952单片机不能执行程序，但将数组的xdata改为code可以演奏一小段。需要高级一点的单片机。在不同的开发板上运行的效果有差异。(Buzzer music to Andy, " practicing" , depending on the chip can be adjusted delay. 8952 microcontroller can execute the program, but will be replaced by code xdata array can play short. Require senior point microcontrollers. The development board running at different effects are different.)

说明：  基于zigbee技术CC2530 开发控制步进电机(Development and Control of Stepping Motor Based on Zigbee Technology CC2530)

ADC采样电压值，显示波形，通过FFT计算频率，双通道ADC，最高500K，100K不失真(ADC Samples Voltage Value and Displays Waveform)

实现modbus 客户端的给功能，实现tcp通讯(Implementing the function of Modbus client,Realizing TCP communication)

实现STM32的bootloader设计，参考代码，可以实现stm32串口bootloader(The bootloader achieve STM32 design, reference code, can achieve stm32 serial bootloader)