ULink not working with uvision4

Working with ULINK2 in keil .After configuring all the settings in Debug .It is not displaying automatically the device id,no etc.JTAG Device chain is not blank .. what should be done?

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  • Hi,

    sorry, my Crystal Ball acccbuzz.files.wordpress.com/.../crystal-ball.jpg is out for repair, so I need some further information from you.

    - which MCU are you using?
    - which (if) Development Board are you using?

    If you are using a Cortex-M device, try to change the interface to SW. The SWJ Box _must_ be checked (in most cases it is always a good idea to have this box checked, it can be unchecked for special debug purposes). Or try JTAG interface with SWJ checked.

    There are some Cortex - devices that do not support JTAG anymore, only SW.

    If you have i.e. an LPC2000 MCU, you must enable the JTAG port via a jumper (and probably disable the serial bootloader interface).

    You can also try to lower the JTAG/SW speed, i.e. to 500kHz, and then try to connect.

    When the port or the speed is changed, ULINK always does a rescan on the selected interface.

    BR,
    /th.

Reply
  • Hi,

    sorry, my Crystal Ball acccbuzz.files.wordpress.com/.../crystal-ball.jpg is out for repair, so I need some further information from you.

    - which MCU are you using?
    - which (if) Development Board are you using?

    If you are using a Cortex-M device, try to change the interface to SW. The SWJ Box _must_ be checked (in most cases it is always a good idea to have this box checked, it can be unchecked for special debug purposes). Or try JTAG interface with SWJ checked.

    There are some Cortex - devices that do not support JTAG anymore, only SW.

    If you have i.e. an LPC2000 MCU, you must enable the JTAG port via a jumper (and probably disable the serial bootloader interface).

    You can also try to lower the JTAG/SW speed, i.e. to 500kHz, and then try to connect.

    When the port or the speed is changed, ULINK always does a rescan on the selected interface.

    BR,
    /th.

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