Sometimes a USB device (such as a dongle or JTAG) related to IAR Embedded Workbench does not respond. A typical situation when the USB system can become "shaken", is when a Microsoft Windows update has been installed.
First of all try to trouble shoot according to the documentation/Technical Notes for the USB device in use.
- Attach the USB device.
- In the Device Manager uninstall this USB device.
- Remove the USB device.
- (Sometimes needed.) Restart the computer. Possibly you also need some (4-5) minutes of power down for the computer.
- Attach the USB device and install the drivers when the Windows Wizard has started.
- Unplug all USB devices, (keep mouse and keyboard).
- Go into Control panel/system/device manager
- Change presentation at menu View to 'Devices by connection' (See picture below.)
- Attach the troublesome USB device.
- Expand the list until you find the non-respronsive USB device. (See example in picture below.)
- Uninstall at a higher level, i.e. the 'Standard universal PCI to...".´, is to be uninstalled (and later reinstalled by the Windows system).
- Plug in the USB device and the Windows Wizard asks for the driver.
- Install the driver.
- Restart PC
- Enter 'Safe Mode'
- Check for (and remove) USB devices that might exist (and only show up in 'Safe Mode') as USB devices that have not been correctly un-plugged.
Actions beyond this Technical Note
- If there are still USB problems, contact your local IAR support department, and request details on more to do.
This Technical Note has been tested with the SuperPro USB dongle and J-Link ARM. The suggestions above might (or not) work for other USB devices used in conjuction with IAR Embedded Workbench.
For example the Atmel JTAGICE-mkII (IAR Embedded Workbench for AVR) and the PE-USB-BDM-probe (IAR Embedded Workbench for HCS12) uses a driver named 'Jungo' which might need other treatment. (At time of writing this has not been tested by IAR.)
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