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#Target deskconnect driver
#Target deskconnect software
#Target deskconnect Pc
#Target deskconnect windows

This can have different reasons as for example the application does disable the debug interface, re-configures the debug pins, enters some kind of low-power-mode or the security of the device is activated.

Check the quality of the debug signals using an oscilloscopeĪfter programming the target device, J-Link is no longer able to establish a connection.

Disconnect on board emulators or other peripherals which may interact on the target interface lines.

Debug signals are shared with other peripherals / on board emulators.If the connection to the target still fails, there is most probably an problem with the interface signals themselves. JTAG speed = 1/8 up to 1/6 of the MCU speed (may be less then 100 kHz) Check that the correct target interface is selected (JTAG, SWD.Another problem can be that the hardware does not allow higher interface speeds. On some hardware / devices, only certain debug interfaces are connected and can be used. Measure the voltage between pin 1 (VTref) and pin 4 (GND) of the debug connector, using an multi-meter.Check the power supply of the target hardware and verify that it is powered (switches on, jumpers are set correctly, etc.).As the target reference voltage is used by the J-Link to create the levels of the debug signals, the reference voltage is mandatory. J-Link measures 0V target reference voltage. If you are using an evaluation board and the issue persists after going through the instructions, please get in touch with SEGGER directly via our support system. In case of the connection is still unsuccessful, please follow the troubleshoot instructions below. Start J-Link Commander and follow the startup configuration instructions.

Connect the target device with the J-Link.

#Target deskconnect software

Please make sure that you are using the latest software version, available for download here: Verify functionality using J-Link Commander In general, we recommend to use an evaluation board to verify the correct functionality between the J-Link and the target device before moving to a custom hardware in order to exclude issues which might be caused by an incorrect hardware design. Please send us a screenshot of the J-Link Commander while the J-Link is connected via USB to the PC.

#Target deskconnect windows

Does the Windows device manager show the J-Link in the list of USB devices?.

#Target deskconnect Pc

If you physically connect the J-Link to the PC via USB: The message should include the answers to the questions below: If you followed the steps above and J-Link Commander is still not able to connect to the J-Link, please get in touch with SEGGER directly via our support system. (WinUSB)_is_installed_but_the_driver_could_not_be_started.J-Link configured for CMSIS boot mode, check settings within J-Link Configurator:.Make sure that you are not effected by the issues below: Switch to a different PC to exclude PC related issues.

#Target deskconnect driver

Verify that the J-Link USB driver is installed.

Reboot the PC to make sure that the USB protocol itself is not in a confused state.

In order to be able to communicate with the J-Link in the native J-Link utilities, the driver needs to be switched back from the J-Link OpenOCD driver to the original J-Link USB driver. If the OpenOCD J-Link USB driver is configured, J-Link can be used with OpenOCD but not with ordinary J-Link utilities like for example J-Link Commander. If it is not, you can skip the OpenOCD paragraph and continue with Test Conenction.įor OpenOCD, a separate J-Link USB driver needs to be installed / used. If the connection is unsuccessful, first check if the J-Link is listed in the Windows Device Manager.

If the J-Link is functional, you should see that the J-Link Commander reports USB connection O.K.

3 After programming the target device, J-Link is no longer able to establish a connectionįirst, verify that the connection between the J-Link and PC is functional and J-Link Commander can communicate with the J-Link successfully:.

2.1 Verify functionality using J-Link Commander.