CCS/TMS320C6748: xds110 dont connect to CCS suddenly

Shalini,

The first point to try and debug this is to see if the Operating System recognized it. If you are using Windows, can you see if the XDS110 entry is shown in its Control Panel? If you are using Linux, can you see if two /dev/ttyACM* devices are present?

user@host:~$ls /dev/ttyACM*
/dev/ttyACM0 /dev/ttyACM1

If these show up, issue the command shown in step 2 of this reference to check if the XDS110 is in the runtime mode and not in DFU mode (this last mode is used to upgrade its internal firmware). If this device is in DFU mode, try to disconnect and reconnect the probe (or connect to a different USB port) and see if it comes back in Runtime mode. 

In case this stays in DFU mode, then perform all the steps of the reference above to try and re-program your debug probe.

Other communication issues can be caused by ground loops between the host computer and the target board, which could have caused stress on the XDS110 circuitry. I suggest measuring voltage differences between the board and the PC with a voltmeter and see if you have the presence of any type of ghost voltage or loop.

Hope this helps,

Rafael