[SOLVED]Using J-Link OB

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  • [SOLVED]Using J-Link OB

    I have an IAR-STM32F103ZE dev board which contains a J-Link OB. I'm attempting to use that J-Link to attach to my target board which contains an STM32F101RE. When I connect the two through the dev board's JATG [sic] connector to my target board's JTAG connector, I'd expect jlink.exe to recognize the dev board's M3 and my target M3. Instead, jlink.exe only reports the dev board's M3.


    SEGGER J-Link Commander V4.08l ('?' for help)
    Compiled Sep 17 2009 09:42:18
    DLL version V4.08l, compiled Sep 17 2009 09:41:55
    Firmware: J-Link ARM-OB STM32 compiled Jun 30 2009 11:14:15
    Hardware: V7.00
    S/N : 320000246
    VTarget = 3.300V
    Info: TotalIRLen = 9, IRPrint = 0x0011
    Info: Found Cortex-M3 r1p1, Little endian.
    Info: TPIU fitted.
    Info: ETM fitted.
    Info: FPUnit: 6 code (BP) slots and 2 literal slots
    Found 2 JTAG devices, Total IRLen = 9:
    #0 Id: 0x3BA00477, IRLen: 4, IRPrint: 0x1 Cortex-M3 Core
    #1 Id: 0x06414041, IRLen: 5, IRPrint: 0x1 STM32 Boundary Scan
    Cortex-M3 identified.
    JTAG speed: 5 kHz
    J-Link>


    I get the same response whether my target is installed or not.

    So what am I doing wrong? Perhaps a jumper on the dev board? (Yes, it could be a problem on my target; I'm at a loss to start debugging that too, so suggestions are welcome.)