Cygnal 8051f000 I2C实例程序

SD卡的其本操作函数，很值得借鉴使用．对于SD卡的编程有很大帮助．-SD Card function of its present operation, it is worth learning to use. Programming for the SD card has great help to me.

Small RTOS的Serial程序，再做点修改，就可以做modbus的程序了！-Small RTOS Serial procedures, some major changes. modbus connection can do the procedure!

单片机学习资料，现成的试验程序，帮组学习单片机-MCU learning materials, ready-made testing procedures, to help groups learn from SCM

对于上位机而言： 1、建立项目；  2、在项目中插入MSComm控件   3、利用ClassWizard定义CMSComm类控制变量  4、在对话框中添加控件     5、添加串口事件消息处理函数OnComm()  6、打开和设置串口参数  7、发送数据   8、发送十六进制字符   9、在接收框中以十六进制显示  对于下位机来说：只需要将串口通信程序下载到下位机即可，不过在连接串口猎人时一定要匹配端口号和波特率。 

应用背景 用于pcie板卡的测试，dma方式，存储器方式 此为官方的资料 关键技术用verilog实现dma方式的官方例程，很有参考价值。

usb51s_v0.4源代码-usb51s_v0.4 source code

AT89C51单片机控制LCD12864液晶显示器显示汉字；-AT89C51 single-chip LCD display LCD12864 control characters

汽车传感器技术在单片机的应用：检测系统的综合应用、工作原理，主要部件介绍-Automotive sensor technology in SCM applications: detection of integrated application system, working principle, introduce the main components

下面是一个超声波测距的程序，硬件电路由于电脑格盘已丢失，下面的代码是从样机上复制的。 硬件电路包括液晶显示、超声波的发射、超声波的接受、滤波、单片机处理。 液晶显示采用LCD1602模块，下面的代码里有液晶的驱动，可以拷贝用于它处。 超声波发射电路包括压电换能器及其支持电路，发射约44KHz的超声波。 超声波的接收电路包含一块CD40106处理芯片。技术指标大约是测距范围在三米左右，测量精度约在厘米级别。大量用于倒车雷达的测距中。-The following is a range of ultrasound procedures, the hardware circuit as a result of the computer grid plate has been lost, the following code is copied from the prototype. Hardware circuit including liquid crystal display, ultrasonic transmitter, ultrasonic acceptance filtering, single-chip processing. LCD1602 LCD module used, the following code, there are LCD drivers, you can use it to copy. Firing circuit including the piezoelectric ultrasonic transducer and its support circuitry, fired about 44KHz ultrasound. Ultrasonic receiver circuit includes a processing chip CD40106. Technical indicators for a range of about 3 meters range around the measurement precision level of about cm. Reversing a large number for the location of the radar.

源代码驱动程序模块的RF RC522。基于Keil C语言和用于STM32F4探索板。包括SPI驱动SPI模块引脚。请记住，使用3.3V的电压.