在LAUNCHXL-F28069M开发板的使用说明书里有这样一段话
In addition to the LED display, temperature information is also displayed on your PC through the
USB/UART connection. To view the UART information on your PC, first figure out the COM port
associated with the LaunchPad. To do this in Windows, right click on My Computer and click on
Properties. In the dialog box that appears, click on the Hardware tab and open Device Manager. Look for
an entry under Ports (COM & LPT) titled "USB Serial Port (COMX)", where X is a number. Remember this
number for when you open a serial terminal. The demo applications UART data was written and debugged
using PuTTY, and for the best user experience we recommend you use PuTTY to view the UART data.
PuTTY can be downloaded from the following URL:
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
Open your serial terminal program and open the COM port you found previously in device manager with
the following settings: 115200 Baud, 8 data bits, no parity, 1 stop bit. After opening the serial port in your
serial terminal, reset the Launchpad with the reset push button and observe the serial terminal for a
surprise.
可是我用putty设置好端口后，按下复位按钮之后，puTTY没有任何反应，请问是怎么回事？