控制USB LPT的代码，通过WriteFile控制USB打印口-Read/Write USB LPT Port by ReadFile/WriteFile API,not by 0x378 I/O Port

TQ2440开发板上串口通信程序 应用程序通过Createfile打开设备，用readfile和writefile实现读写串口-Serial Communication TQ2440 development board applications through Createfile to open the device with read and write serial port readfile and writefile to achieve