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TMS320F28388D: XDS110 Debug Probe Reset issue - debugger resets when we connect a DMM probe to GND

Rahul Dhakate
Prodigy 30 points

Part Number: TMS320F28388D

Hello Team,

Hope you are doing well.

I am currently working on TMS320F28388DPTPSR and using XDS110 Debug Probe for programming the microcontroller. 

I am facing the issue of debugger resets when I connect a DMM probe to GND. The issue is coming after programmming the controller & while running the board. 

The Hardware connections are :

Pin 1 - TMS : 10K Pull-up to 3V3

Pin 2 -  TRSTn : 10K Pull-down 

Pin 3 - TDI : TDI of controller

Pin 5 - VTREF : 10K Pull-up to 3V3

Pin 7 - TDO : TDO of controller

Pin 11 - TCK : Pull-up to 3V3

Pin 8, Pin 10, Pin12 : Ground

Pin 4, Pin 6, Pin 9, Pin 13, Pin 14 : Not Conneted

 

The error is as follows: on CCS 

C28xx_CPU1: Error: (Error -1044 @ 0x0) The debug probe reported an error. Confirm debug probe configuration and connections, reset the debug probe, and retry the operation. (Emulation package 20.0.0.3178) 
C28xx_CPU1: Trouble Halting Target CPU: (Error -1135 @ 0x8BB52) The debug probe reported an error. Confirm debug probe configuration and connections, reset the debug probe, and retry the operation. (Emulation package 20.0.0.3178) 
C28xx_CPU1: Unable to determine target status after 20 attempts
C28xx_CPU1: Failed to remove the debug state from the target before disconnecting.  There may still be breakpoint op-codes embedded in program memory.  It is recommended that you reset the emulator before you connect and reload your program before you continue debugging.

Suggest me wheather is it a issue of Hardware or Firmware? How to solve this?

  • 0
    TI__Genius 16690 points

    Hello,

    Apologies for the delay, last week I was out on holiday.

    Rahul Dhakate said:
    Pin 4, Pin 6, Pin 9, Pin 13, Pin 14 : Not Conneted

    Can you try following the datasheets recommendations for JTAG connectivity for these pins? 

    • Pin 4 (TDIS) should be connected to GND
    • The TCK output terminal should be looped back to the RTCK input terminal of the header (to sense clock continuity by the JTAG debug probe)
    • Pin 13/14 should have pull ups to 3.3V

    Source: Section 7.10.7 Emulation/JTAG in the datasheet

    Rahul Dhakate said:
    Pin 5 - VTREF : 10K Pull-up to 3V3

    If the modifications above doesn't work, can you try using a stronger pull-up (100 Ohms) on VTREF, as recommended by the datasheet?

    Best,

    Matt