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MSP-FET Flash Emulation Tool problem

Other Parts Discussed in Thread: MSP-TS430RGZ48B, MSP430F5342, MSP-FET

Hi,

I am using MSP FET Flash Emulation Tool for MSP-TS430RGZ48B board with MSP430F5342.I am using CCS 6.1.2 .Initially I was using it successfully. I am not able to connect to the board now and getting this error.

Error connecting to the target-Unknown Device

Unable to connect to target.

I remember this error used to come when I was selecting the wrong device. Now I am selecting the correct family and device though.

I see the red light flashing for a few seconds when I try to write to MSP.And then it stops and I eventually get the error.  VCC_TOOL as described in User's Guide SLAU647E–July 2015–Revised September 2016 page 19 is 3.3 Volt, after power up. I am not getting this voltage. This is why I have come to conclusion that it might be a problem with the debugger.

The MSP board has JP3 connected to int pin as was by default.

  • Did this error occur after you replaced the device in the target board? If so, could you please make sure the chip orientation (Pin 1) matches the orientation expected by the socket on the target board?

    If the chip orientation is correct, can you try connecting to a new chip?

    Can you confirm that JP1 has not been removed on the target board?

    In CCS, has the Target Voltage value been changed (found under "Properties" -> "Debug" -> "MSP43x Options")?

    If these suggestions don't fix your issue, we can dig deeper.

    Regards,

    James

    MSP Customer Applications

  • Thanks for the reply

    I was not able to write to MSP(got the above described error). I found the MSP430 chip I was using somehow had short circuited(I found VCC and GND shorted)while using. Hence I replaced it with a new chip. I am sure I had the new chip oriented right. Still I am unable to write.

    JP1 is intact as it was by default. I have not changed the Target Voltage. It is 3000mV.

  • I plugged a MSP-FET into my PC and measured the voltage between Pin 2 (VCC_TOOL) and Pin 9 (GND) with a multimeter, which was equal to 3.3VDC. Can you check this on your MSP-FET?

    If the VCC and GND pins on the MSP430 were shorted, I'm concerned that this damaged the MSP-FET.

    Regards,

    James

    MSP Customer Applications
  • I checked the voltage between Pin 2 (VCC_TOOL) and Pin 9 (GND) on my MSP-FET. It is not shorted . It is 0.55V DC.

    Thanks,

    Vaishravana. 

  • I'm sorry if I wasn't clear enough in my previous post.

    I suspect that the short between the VCC and GND pins on the MSP430 in your target board damaged the power supply inside the MSP-FET when it was connected. My reasoning comes from the fact that you're measuring 0.55V when specifying a target output voltage of 3.0V.

    Unfortunately, you'll probably have to purchase another MSP-FET.

    Regards,

    James

    MSP Customer Applications
  • Thanks James. I am suspecting DC level shifter to have got damaged and thinking of replacing it. I need some help.

     

    The above figure is from page 22 of "the User's Guide SLAU647D–July 2015–Revised July 2016 MSP Debuggers" document.

    Since VBUS is 5V. VCC_DT must be ((160K+180K)/160K) *1.208 =2.55V . But the expected voltage is 3.3V(or 3000mV as we specify in Target Voltage). Is my analysis right?

     

    Thanks,

    Vaishravana

  • Hi,
    I am eagerly waiting forward for your kind reply.
    Thanks,
    Vaishravana
  • Hi,

    Please let me know if my question is out of the scope for support.

    Thanks,

    Vaishravana

  • Vaishravana Somashekhar said:
    Please let me know if my question is out of the scope for support.

    My support focuses on the MSP43x devices and the tools that support these devices. However, tools like the MSP-FET are composed of many components, including many analog devices, that aren't supported by our group. This is why my recommendation would be to purchase a new MSP-FET to save you time debugging the damaged tool in order to continue developing and debugging your code on the microcontroller.

    If buying a new MSP-FET isn't an option, my best recommendation would be to take a look at the "S/W controlled DC DC converter" section on page 24 in the MSP Debuggers User's Guide. This section has active and passive devices that may be very difficult to test on the board.

    Regards,

    James

    MSP Customer Applications

  • Hello Vaishravana,
    Have you consider giving external supply to MSP430 and detect it through pin no 4 of MSP debugger 14 pin connector in place of supplying the power from pin no 2. This is also an option which may work if your MSP-FET 3V supply source is dead.

    Regards,
    Vikas Chola
  • Hi,
    We got the debugger working. After a long debug session,it was noted the switch U18 has 2 power inputs, VCC_SUPPLY and VCC_SUPPLY_TRGT . Neither one was appearing at the output. The switch is now replaced and the debugger is working fine now. I am able to write to MSP board successfully.