What JTAG interface and debug tools are being used successfully with IMX6Q on SabreLite or Nitrogen6X devel boards?
I will be writing a custom U-Boot BSP and would like to have source-level debugging capability. I tried a Segger J-Link with Segger 20-pin to 9-pin adapter and the latest version of Segger's GDB Server, but GDB does not seem to connect reliably with the IMX6Q on Nitrogen6X. I also tried Segger's J-Link Commander as a test and I see the following in the GDB Server's log:
Waiting for J-Link connection...
J-Link is connected.
Firmware: J-Link ARM V8 compiled Sep 20 2012 13:27:01
Checking target voltage...
Listening on TCP/IP port 2331
Connecting to target...WARNING: At least one of the connected devices is not JTAG compliant (IEEE Std 1149.1, 7.1.1.d, IR-cells). (NumDevices = 3, NumBitsSet = 2)
WARNING: Could not power-up system power domain