Texas Instruments LaunchPad MSP430G2 Series, Руководство пользователя

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10 SLAU772A – June 2018 – Revised March 2020
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MSP430G2553 LaunchPad™ Development Kit (MSP ‑ EXP430G2ET)
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 "MSP Application UART1" port. In this case, Figure 7 shows COM13, 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.
On the target MSP430G2553 side, the backchannel is connected to the USCI_A0 module. The eZ-FET
has a configurable baud rate; therefore, it is important to configure the baud rate of the PC application to
the same rate as the USCI_A0.
NOTE: The backchannel UART connection in the isolation jumper block can also be configured to
use a SW UART. The SW UART is done through the TimerA0 module located on pins P1.1
and P1.2. If the jumpers are in the horizontal position, the HW UART should be used. If the
jumpers are in the vertical position, the SW UART should be used. The orientation guidelines
are also printed in silkscreen on the board. It is recommended to use the HW UART
configuration.
2.3 Power
The board was designed to accommodate various powering methods, including through the onboard eZ-
FET as well as external or BoosterPack plug-in module power (see
Figure 8 ).
Figure 8. MSP-EXP430G2ET Power Block Diagram