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Finally I got it working properly. Reading SDcard was very awesome for me for first time, so I decided to make a library for STM32F4xx devices and post it to my website. It’s basically just communication interface between STM32F4 and FatFS library by Chan. It supports SPI or SDIO communication. Library also supports USB communication, but for that purpose you need USB stack too. USB is available here

DMA9061A基于LPC2300的源代码(dma9061a with lpc2300 s source code)

SC1200的PCB原文件，使用POWER PCB 4.0设计，8层板，高密度，符合PC104标准。(PCB of SC1200,POWER PCB 4.0,PC104.)

说明：  此游戏是在STM32F407上开发的一款简易版贪吃蛇游戏，具有设置功能，可以调节蛇与食物颜色，还具有调节声音，暂停等功能。(This game is a simple version of Snake Eating game developed on STM32F407. It has setting function, can adjust the color of snake and food, and also has the functions of adjusting sound and pausing.)

磁栅尺开发资料. 用这个资料,可以轻松做到0.48um的高精度磁栅尺.( Magnetic scale development information. With this information, you can easily do 0.48um high-precision magnetic scale.)

SHT71温湿度传感器源程序，通过测试(tempreturesensor and Humiture)

按键，lpc2103的按键程序，能很好的实现按键程序，可以在很多处理器上使用！(Button, lpc2103 buttons procedures for the implementation of key processes very well, can be used in many processors!)

说明：  Simplicity Studio下的EFM8SB1例程(One Program of EFM8SB under Simplicity Studio)

基于STM32F407 实现USB UVC摄像头主机功能功能(Implementation of USB UVC camera host function based on STM32F407)

STM32F103伺服驱动器源代码包含各种核心驱动算法(base on STM32F103 servo driver source include many core Algorithm)