Search

Technical Discussion Group Forum

This forum is provided for user discussion. While Logic PD support staff and engineers participate, Logic PD does not guarantee the accuracy of all information within in the Technical Discussion Group (TDG).

The "Articles" forums provide brief Articles written by Logic PD engineers that address the most frequently asked technical questions.

To receive email notifications when updates are posted for a Logic PD product download, please subscribe to the TDG Forum of interest.

PrevPrev Go to previous topic
NextNext Go to next topic
Last Post 03 Jun 2008 02:53 PM by  addyyang
IAR JTAG Cannot Talk to NXP LH79524
 5 Replies
Sort:
You are not authorized to post a reply.
Author Messages
dwills
New Member
New Member
Posts:


--
29 May 2008 05:09 PM
    Hi,

    For some reason, my JTAG cannot connect to the ARM. The J-Trace recognizes board power but not the chip.

    The starter kit baseboard quick start guide shows n/a for the jumper settings on J6. I assume this means no jumpers, but I tried all combinations of jumpers on J6 and none work.

    Both the J-Trace and the Zoom starter kit are new out of the box, so it's unlikely either is bad.

    Anyone have any ideas of what I might try next?

    Thanks,

    Dave
    dwills
    New Member
    New Member
    Posts:


    --
    29 May 2008 06:30 PM
    Here are the JTAG messages:

    J-Link>r
    Reset delay: 50 ms
    Reset type NORMAL: Using RESET pin, halting CPU after Reset
    Info: TotalIRLen = 3, IRPrint = 0x01
    Info: Resetting target using RESET pin

    WARNING: RESET (pin 15) high, but should be low. Please check target hardware.
    Info: Halting CPU core
    Info: Resetting target using RESET pin

    WARNING: RESET (pin 15) high, but should be low. Please check target hardware.
    Info: Halting CPU core
    Info: Resetting target using BP@0.

    ****** Error: Too few devices on the JTAG bus. IRPos: 0, TotalIRLen: 3
    J-Link>
    addyyang
    New Member
    New Member
    Posts:


    --
    30 May 2008 03:09 PM
    I got the exactly same issue as yours, and it has not been solved yet.

    if I type 'hwinfo' command in J-link commander, i noticed that 'target power is disabled'.

    Also, as other threads mentioned, i typed command 'speed 8000' and 'rx 0' , but got 'arm core is not halted', I think this is the reason why jtag couldn't get control of the core.

    However, i don't know how to 'halt' the core.


    Posted By dwills on 29 May 2008 6:30 PM
    Here are the JTAG messages:

    J-Link>r
    Reset delay: 50 ms
    Reset type NORMAL: Using RESET pin, halting CPU after Reset
    Info: TotalIRLen = 3, IRPrint = 0x01
    Info: Resetting target using RESET pin

    WARNING: RESET (pin 15) high, but should be low. Please check target hardware.
    Info: Halting CPU core
    Info: Resetting target using RESET pin

    WARNING: RESET (pin 15) high, but should be low. Please check target hardware.
    Info: Halting CPU core
    Info: Resetting target using BP@0.

    ****** Error: Too few devices on the JTAG bus. IRPos: 0, TotalIRLen: 3
    J-Link>


    addyyang
    New Member
    New Member
    Posts:


    --
    30 May 2008 03:11 PM
    and i don't think the issue comes from jumper settings.

    Posted By dwills on 29 May 2008 5:9 PM
    Hi,

    For some reason, my JTAG cannot connect to the ARM. The J-Trace recognizes board power but not the chip.

    The starter kit baseboard quick start guide shows n/a for the jumper settings on J6. I assume this means no jumpers, but I tried all combinations of jumpers on J6 and none work.

    Both the J-Trace and the Zoom starter kit are new out of the box, so it''s unlikely either is bad.

    Anyone have any ideas of what I might try next?

    Thanks,

    Dave


    emenard
    New Member
    New Member
    Posts:


    --
    31 May 2008 12:19 AM
    Hi,

    I had the same problem using the J-Trace but made some progress by installing J6 jumpers 1-3 and 5-6 (contrary to the NXP documentation that says these jumpers are N/A). After doing that I got the following output from the jlink utility:

      >jlink
      SEGGER J-Link Commander V3.78a ('?' for help)
      Compiled Dec 4 2007 22:18:44
      DLL version V3.78b, compiled Dec 10 2007 17:56:48
      Firmware: J-Trace ARM Rev.1 compiled Sep 5 2007 06:57:41
      Hardware: V1.00
      S/N : 101100098
      OEM : IAR
      ETM support, Trace buffer size: 1024KB
      VTarget = 3.319V
      Info: TotalIRLen = 4, IRPrint = 0x01
      JTAG speed: 29 kHz
      Found 1 JTAG device, Total IRLen = 4:
      Id of device #0: 0x0F0F0F0F
      Found ARM with core Id 0x0F0F0F0F (ARM7)
      J-Link>testcspeed
      Testing CPU clock frequency @ address 0x00000000...
      CPU running at 73686 kHz
      J-Link>testrspeed
      Speed test: Reading 8 * 8kb from address 0x00000000 ........
      8 kByte read in 4722ms ! (1.7 kb/sec)
      J-Link>testwspeed
      Speed test: Writing 8 * 8kb into memory @ address 0x00000000 ........
      8 kByte written in 3285ms ! (2.5 kb/sec)
      J-Link>h
      PC: (R15) = 00000000, CPSR = 000000D3 (SVC mode, ARM FIQ dis. IRQ dis.)
      R0 = 00034437, R1 = 000000DF, R2 = E2800001, R3 = EAFFFFFD
      R4 = 07060504, R5 = 0B0A0908, R6 = 0F0E0D0C, R7 = 13121110
      USR: R8 =17161514, R9 =1B1A1918, R10=1F1E1D1C, R11 =EEEDECEB, R12 =F2F1F0EF
      R13=F6F5F4E3, R14=FAF9F8F7
      FIQ: R8 =DE521F66, R9 =283976B3, R10=A3959641, R11 =A0004073, R12 =89DDAA70
      R13=8683B02C, R14=504378C6, SPSR=500000D0
      SVC: R13=20043290, R14=200047D4, SPSR=60000053
      ABT: R13=6C0189D3, R14=0000CF48, SPSR=000000DF
      IRQ: R13=88091685, R14=600000D2, SPSR=60000053
      UND: R13=1C946B86, R14=00000038, SPSR=800000D7
      J-Link>exit


    It also seems to work with a J-Link (without changing the jumpers).

    I wasn't able to test it using IAR EW because my license file is messed up (new installation isn't honoring the initial time-limited license)...

    --Ed
    addyyang
    New Member
    New Member
    Posts:


    --
    03 Jun 2008 02:53 PM
    I made a MISTAKE here.
    It does matter about the jumper setting on LH79524
    should be 1-3 AND 4-6.

    Now, i am able to get the J-FLASH work.


    Posted By addyyang on 29 May 2008 5:9 PM
    and i don''t think the issue comes from jumper settings.

    Posted By dwills on 29 May 2008 5:9 PM
    Hi,

    For some reason, my JTAG cannot connect to the ARM. The J-Trace recognizes board power but not the chip.

    The starter kit baseboard quick start guide shows n/a for the jumper settings on J6. I assume this means no jumpers, but I tried all combinations of jumpers on J6 and none work.

    Both the J-Trace and the Zoom starter kit are new out of the box, so it''''s unlikely either is bad.

    Anyone have any ideas of what I might try next?

    Thanks,

    Dave




    You are not authorized to post a reply.