• State TI Thinks Resolved
  • Locked Locked
  • Replies 7 replies
  • Answers 1 answer
  • Subscribers 79 subscribers
  • Views 429 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSP430F247: C-GANG Reset issue

Guido Tedeschi
Prodigy 20 points

Part Number: MSP430F247
Other Parts Discussed in Thread: C-GANG, , MSP430F248

It seems that C-GANG has a single Reset line connected to all six DUTs and limited drive...

Our devices with MSP430F247 or MSP430F248 have 47k pull-up and 2200pF capacitor and with one to five devices connected (total of 9400 ohm and 11nf), the "Hardware Reset (RST line) and start the application program" works fine, but if we connect the sixth device (total of 7833 ohm and 13.2nf) the application doesn't start.

If we disconnect and reconnect the power supply of devices, the application start correctly.

We tried to increase the RESET pulse time or selected JTAG Slow but nothing changed.

We use six lines, the 4 JTAG, RST and GND; VCC is not connected.

The issue belongs to 7.8kohm pull-up resistor or to 13.2nF?

Thanks and best regards

Guido

 

  • 0
    TI__Expert 6930 points

    Hi Guido,

    The following is a schematic for J4 of the C-GANG splitter:

    There are separate RST lines for each of the 6 DUTs.

    The full schematic and user guide can be found here.

    Guido Tedeschi said:
    but if we connect the sixth device (total of 7833 ohm and 13.2nf) the application doesn't start.

    Does this mean the application is still successfully loaded on all 6 devices? 

    Guido Tedeschi said:
    If we disconnect and reconnect the power supply of devices, the application start correctly.

    Is this with all 6 devices?

    What is the total combined power usage between the 6 boards? The C-GANG at VCC=3.3 can supply at most 200mA of current.

    Best Regards,
    Brian

  • 0 in reply to Brian Lee
    Prodigy 20 points

    Hi Brian, thanks for the anwer and happy new year.

    The application is succesfully loaded on all 6 devices and, disconnecting and reconnecting the power supply of devices, all 6 devices start correctly.

    The devices are not powered from C-GANG but with separate 3.3V

    Thanks and best regards

    Guido

  • 0 in reply to Guido Tedeschi
    TI__Expert 6930 points

    Hi Guido,

    Happy New Year!

    There have been issues seen when configuring the Gang-Pro software from August for external power. The following is an updated version from December that fixes the GUI, but there are still currently standalone mode issues.

    8507.GangPro-ARM-03-Dec-2025.zip

    Can you test with this version to see if it fixes the issues you're seeing?

    Best Regards,
    Brian

  • 0 in reply to Brian Lee
    Prodigy 20 points

    Hi Brian and thanks for the quick answer.

    Now we dismantled our testbench and we are building a fixture to program the six devices, when ready I will test the new version.

    One question about the software: if we have two C-GANG connected to one PC, how can we program 12 devices without selecting manually one programmer, program six devices, then select the other programmer and program the other six?

    Best Regards

    Guido

  • 0 in reply to Guido Tedeschi
    TI__Expert 6930 points

    Hi Guido,

    I do not believe this is something that can be done with the GUI. I am checking with Elprotronic to see if it's possible using their DLL. This might save you some time, but you can open multiple instances of the GUI, assign a different C-GANG to each, and then program the connected devices.

    Best Regards,
    Brian

  • 0 in reply to Brian Lee
    TI__Expert 6930 points

    Hi Guido,

    I have confirmed with Elprotronic it is possible to control multiple C-GANGs, and using their DLL is the easiest way. They have code examples on their wiki here: https://elprotronic.atlassian.net/wiki/spaces/FPGPARM/pages/57770262/C+C+Basic+Demo+Code+Sequence. There are also demo examples in the install directory showing how to use multiple adapters.

    Best Regards,
    Brian

  • 0 in reply to Brian Lee
    Prodigy 20 points

    Many thanks Brian,

    for now we will use two PCs, and in the future we will consider developing dedicated software.

    Best Regards

    Guido

**Attention** This is a public forum