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Serial COM Not Working on MSP-EXP430G2 LaunchPad

Henry Grant
Prodigy 150 points


Cannot Display Data From MSP430 Launchpad Demo Application, Internal Temperature Measurement

I have the MSP-EXP430G2 Launchpad MSP-EXP430G2. While running the Temperature Measurement Demo, I cannot get any data from the USB port to display on a HyperTerm. What USB driver do I need to load?

Scenario: The LaunchPad is connected to a free USB port on a PC with the mini USB cable that came with the kit. Pressing P1.3 will switch the app to the temp measurement mode. I can touch the actual MSP430 dip and change the brightness of the red or green leds if my finger is warm or cold respectively. So, I know the demo program is working.

The PC is running Windows XP Pro version 2002 Service Pack 3 with all current updates. The COM port shows up as “MSP430 Application UART (COM3)". The port settings are 2400, 8, N, 1, N (speed, bits, parity, stop, flow). The device manager indicates the driver is Microsoft Corp usbser.sys – IS THIS THE CORRECT DRIVER?

I’ve set the com port baud rate to 2400 per the code in “Temperature_Sense_Demo” and the code in the GUI “LaunchPad_Temp_GUI.java”.

  • 0
    Prodigy 150 points

    Many thanks to Boyd R for the suggesting to use Realterm – it’s more versatile than Coolterm or Hyperterm. I installed it and began poking around and found that there was a conflict with a null-modem emulator, virtual serial port driver (com0com) from SourceForge. I un-installed it, rebooted and presto began receiving data.

    I use com0com in order to setup pairs of virtual ports to allow serial data transfer between applications I'm working on. After I un-installed com0com I was able to receive data from the MSP430 temp demo application.

     

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