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SLAU597E–March 2015–Revised January 2018
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Copyright © 2015–2018, Texas Instruments Incorporated
MSP432P401R SimpleLink™ Microcontroller LaunchPad™ Development Kit
(MSP
‑
EXP432P401R)
On the host side, a virtual COM port for the application backchannel UART is generated when the
LaunchPad development kit enumerates on the host. You can use any PC application that interfaces with
COM ports, including terminal applications like Hyperterminal or Docklight, to open this port and
communicate with the target application. You need to identify the COM port for the backchannel. On
Windows PCs, Device Manager can assist.
Figure 7. Application Backchannel UART in Device Manager
The backchannel UART is the XDS110 Class Application/User UART port. In this case, Figure 7 shows
COM156, but this port can vary from one host PC to the next. After you identify the correct COM port,
configure it in your host application according to its documentation. You can then open the port and begin
communication to it from the host.
The XDS110-ET has a configurable baud rate; therefore, it is important that the PC application configures
the baud rate to be the same as what is configured on the eUSCI_A0 backchannel UART.
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