适合移植到嵌入式设备上如网络摄像头，扫描二维码，扫描率高-It s usefull to scan a qrcode on your ipcamera

基于STM32的二维码扫描技术，使用OV7725作为摄像头，挂载一个1m的sram便于我们的计算，提供zbar的源码移植(STM32 based two-dimensional code scanning technology, using OV7725 as a camera, mount a 1m SRAM to facilitate our calculation, provide ZBar source transplant)