win ce 6.0系统下写的功能非常强大的串口通讯类，已经经过测试，没有任何问题，可以直接引用。-Windows ce 6.0 very powerful serial interface communication system under the writing class, have been tested, no problem, you can directly reference.

dnw wince716 1. Run “DNW.exe” on PC and “Communication” -> “Option” to choose proper communication parameters, then “Serial” ->“Connect”. 2. Applying power to MT688. 3. System will run and message will show in DNW windows. 4. Pressing “sp