The main program detects a button press through the USB port to send "This is BW-DK5483", the USB development board is connected with the PC interface, PC serial port operation master serial debugging software, open the USB serial port to receive and observe the development board to send data, but also by the end of the PC to send data to the development board, the board will receive data back to the PC

Filename	Size	Update
07-USBͨѶ\Debug\Exe\USB.d43	32466	2018-01-10
07-USBͨѶ\Debug\Obj\main.r43	35203	2018-01-10
07-USBͨѶ\Debug\Obj\USB.pbd	170	2018-01-11
07-USBͨѶ\main.c	12281	2017-12-30
07-USBͨѶ\PIN_DEF.H	11980	2010-10-28
07-USBͨѶ\settings\USB.cspy.bat	2850	2018-01-11
07-USBͨѶ\settings\USB.dbgdt	3831	2018-01-11
07-USBͨѶ\settings\USB.dni	1124	2018-01-11
07-USBͨѶ\USB.dep	2829	2018-01-13
07-USBͨѶ\USB.ewd	17882	2017-12-09
07-USBͨѶ\USB.ewp	47476	2017-12-09
07-USBͨѶ\Debug\Exe	0	2013-09-23
07-USBͨѶ\Debug\List	0	2010-11-05
07-USBͨѶ\Debug\Obj	0	2018-01-11
07-USBͨѶ\Debug	0	2013-09-23
07-USBͨѶ\settings	0	2013-09-23
07-USBͨѶ	0	2017-12-30

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