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MSP-FET: MSP-FET vs Ez-FET UART Backchannel

Fred P
Expert 2165 points
Part Number: MSP-FET

Tool/software:

I have been using Ez-FET for a long time and I now consider a switch to MSP-FET probe.

Ez-FET presents 2 separate USB interface, one for the debug interface and one for the UART channel.  That gives 2 COM ports named  "MSP debug interface" and "MSP application UART" at the descriptor level.  The application UART is actually a passthrough, which is very convenient.

Does the MSP-FET do the same as the Ez-FET  (2 interfaces) or its "backchannel UART " is somehow entangled with the debug interface all in one single USB interface that requires the appropriate driver+software to be used? 

Regards

  • +1
    TI__Genius 15650 points

    Hi Fred, 

    The MSP-FET should appear the same as the Ez-FET in the device manager, meaning a separate application and debug UART. So your backchannel UART will still be accessible in the same way between MSP-FET and Ez-FET.

  • 0
    Guru 22685 points

    The backchannel UART interface is provided by the micro-controller on the ezFET, etc. The MSP-FET doesn't do this. For one, the standard 14 pin JTAG connector doesn't have the signal lines for TXD and RXD. See section 2.1 of the manual.

  • 0 in reply to David Schultz
    Guru 34453 points

    FET430UIF does not have TXD/RXD lines, but MSP-FET have.  Figure 14 from slau647 MSP Debuggers User's Guide...

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