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CCS/AM3358: Error when loading code to BBB with XDS100v2

qxc
Genius 5820 points
Part Number: AM3358

Tool/software: Code Composer Studio

I try to debug some code on a BeagleBone Black out of CCs but always get this error:

CortxA8: GEL: Error while executing OnTargetConnect(): Cannot read register CPSR: data is not present
	 at (CPSR&=~(0x20)) [BeagleBlack_400Mhz_4GbDDR.gel:290]
	 at AM335xStartState() [BeagleBlack_400Mhz_4GbDDR.gel:334]
	 at OnTargetConnect()
CortxA8: Trouble Writing Memory Block at 0x80000000 on Page 0 of Length 0x7ff0: This operation is not supported by this driver
CortxA8: File Loader: Verification failed: Target failed to write 0x80000000
CortxA8: GEL: File: /home/universe/AM335X_StarterWare_02_00_01_01/binary/armv7a/cgt_ccs/am335x/beaglebone/espace/Debug/espace.out: Load failed.

The file espace.out which is mentioned in last line definitely exists and is valid. same is true for the BeagleBlack_400MHz_4GbDDR.gel-file.

Any idea what this error message means and what is wrong?

What I notices: the debugger appears as serial interface but I did not found a place where I would have to configure the port /dev/ttyUSB0 which is assigned to it...may be this is the reason?

Thanks!

  • 0
    TI__Guru**** 169834 points
    Hi,

    The error you see is related to the inability of the Debugger to properly access the device while running the initialization script (also called a GEL script). The subsequent errors are a consequence of this script not running properly.

    This issue can be caused by many factors, but the most common reason for the BeagleBone Black is the fact you may have code already running on the device, which prevents a proper initialization.

    If that seems to be your case, I would remove the SD card or try to halt the autoboot process and then connect to the device.

    The XDS100v2 Debug Probe in fact instantiates as two serial ports - no concerns here given that CCS seems to be properly communicating with the probe.

    Hope this helps,
    Rafael
  • 0 in reply to desouza
    Genius 5820 points

    Thanks for your fast answer.

    There is no SD-card inserted but there is an MLO file on the on-board eMMC - shouldn't it end when it does not find any program to start?

    On the other hand: isn't there an option to reset the SoC via the probe prior to a Debug-session?

  • 0 in reply to desouza
    Genius 5820 points

    OK, I removed the MLO-file from the eMMC so that there is no boot file and no operating system available any more. The error is the same. What else could cause this?

  • 0 in reply to qxc
    Genius 5820 points
    Some progress: there was a problem with the access rights to the serial port of the probe. After fixing this, the error message has changed:

    CortxA8: File Loader: Verification failed: Values at address 0x80000000 do not match Please verify target memory and memory map.
    CortxA8: GEL: File: /home/universe/AM335X_StarterWare_02_00_01_01/binary/armv7a/cgt_ccs/am335x/beaglebone/escpace/Debug/espace.out: a data verification error occurred, file load failed.
  • 0 in reply to qxc
    TI__Guru**** 169834 points

    Hi,

    Please apologize for the delay.

    The error you are getting is related to the inability to load code to the DDR memory. The section below talks about it:

    I see you already have the GEL script configured, thus it may be either an issue with the memory itself (the link above has some useful tips to perform this test) or somehow the script is incompatible with the board you are using. Where did you get this GEL file? CCSv6.x and newer ship with a Target Configuration for the BeagleBone Black that has been proven for many years to work with this board.

    One remark: it is interesting that access rights were somehow being blocked - thsi should have prevented you from accessing it at all (not even being able to start running the GEL itself).

    Hope this helps,

    Rafael