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No JTAG device found

Hi,
When I using ULINK2 to program LPC2478, the uVision4 showed "no JTAG device found".
It was working normal before but failed suddenly at this board. Can anyone help me on this ?

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  • I think I have got the root cause.
    My Laptop is installed with MDK V4.60, my PC was installed with MDK V4.72 (newest version).
    I think the original firmware of my ulink2 adapter was v1.42.

    OK, when I using my laptop(MDK V4.60) with the ulink2 adapter, it was good.
    Then at the next debug, I was using my PC (MDK V4.72) with the ulink2 adapter, during the debug, the updated uVision program upgraded the firmware of my ulink2 adapter from v1.42 to v2.01, then the adapter failed to detect the JTAG target at both version of uVision (MDK V4.72 & V4.60).

    I have downgrade the ulink2 firmware from v2.01 to v1.42, now it worked without any issue with uVision V4.60.

    I will not upgrade the uVision anymore...:(

    Any Keil folk can explain why ??

Reply
  • I think I have got the root cause.
    My Laptop is installed with MDK V4.60, my PC was installed with MDK V4.72 (newest version).
    I think the original firmware of my ulink2 adapter was v1.42.

    OK, when I using my laptop(MDK V4.60) with the ulink2 adapter, it was good.
    Then at the next debug, I was using my PC (MDK V4.72) with the ulink2 adapter, during the debug, the updated uVision program upgraded the firmware of my ulink2 adapter from v1.42 to v2.01, then the adapter failed to detect the JTAG target at both version of uVision (MDK V4.72 & V4.60).

    I have downgrade the ulink2 firmware from v2.01 to v1.42, now it worked without any issue with uVision V4.60.

    I will not upgrade the uVision anymore...:(

    Any Keil folk can explain why ??

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