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DLPC350: Unable to boot into bootloader mode.

user5024005
Prodigy 30 points
Part Number: DLPC350
Other Parts Discussed in Thread: DLPLCR4500EVM,

Hi,

On one of our DLPLCR4500EVM boards, we have uploaded the firmware safely with "skip bootloader", but the firmware upload was aborted at around 10% and now we cant connect to it at all.

It seems that the reason for the failure is DEFAULT.AUTOSTART=1 option in the firmware, which instructs the DLP to boot into standby.

Now, I put J30 jumper in, to force the DLP into bootloader mode, but it goes into standby instead!

What options do we have to recover from this state?

1. We dont have a JTAG boundary scan cable to follow this guide: www.ti.com/.../dlpu017a.pdf

2. We have an ST-Link v2 JTAG programmer and it seems as J24 is a compatible connector to it. Could it work? Is there a guide?

3. What other options do we have to recover from this state?

Peter

  • 0
    TI__Mastermind 30600 points
    Hi Peter,

    The recommended course of action is the JTAG boundary scan. The parts are cheap and it is easy to put together, I believe the guide tells you exactly what you need. It is a good thing to have around in case you get into trouble again.

    -Paul
  • 0 in reply to Paul Goedeke
    Prodigy 30 points

    Hi Paul!

    Thanks for your response!

    We will get one.

    However, I'm curious what the other JTAG connector on the board is. It seems like an STM32 ST-LINK connector.

    It would be nice if we would have a single programmer for all our STM microcontrollers.

    Peter

  • 0 in reply to user5024005
    TI__Mastermind 30600 points
    A quick summary of the connectors on the board:

    J29 is for an external LED driver.
    J16, J17 are I2C
    J9 is an FPD-Link connector
    J11 and J14 are trigger connectors
    J1, J3, J4, J6 are PandaBoard connectors

    J24 is a JTAG connector but the TMS and TDO lines are different from J25. It is primarily used for debug and testing, these pins go to reserved pins on the DLPC350.

    J25 is JTAG that you want and has connections to the correct JTAG pins on the DLPC350.

    -Paul