USBPRINT的通信参数，可以用来控制USB口打印机-USBPRINT communication parameters can be used to control USB printers

一个描述USB打印机接口通讯协议的文件,讲的不是很清楚,适合有一定基础的人看.参考价值一般-A descr iption of the USB printer interface communication protocol documents, say not very clear look suitable for a certain basis. General reference value

打印机测试APK,适合各种接口，用在android平台-printer test apk