we have i.mx6 custom board here we are able connect the board with JTAG(ARM JTAG 20).
These are the values we had observe in Oscilloscope.
The above for I.MX8MPLUS EVK and I.MX8MPLUS Custom boards ,here we are using Coresight 20 pin JTAG .
After connecting tried to debug in debug configuration we are unable to connect the board through JTAG(Coresight 20) .
For both boards I.MX6 and I.MX8MPLUS we are using same tools and software(Arm development studio and Dstream-ST) .
This procedure we are following for both I.MX6 Dual Lite and I.MX8MPLUS EVK and I.MX8MPLUS CUSTOM BOARD.
For I.MX6 Dual Lite we are connected successfully to the target through JTAG(DSTREAM-ST) .
but I.MX8MPLUS Unable to Connect the Target.
In debugging tab we enabled Connect only after that click on debug. We are getting failed to connect to any devices on the target. Check that the target is correctly connected to the debug probe and powered on.
Hi again
This seems to be a continuation of your previous posting
https://community.arm.com/support-forums/f/armds-forum/57412/unable-to-connect-to-target-i-mx8mplus
Have you tried the suggestions given there? In particular, the sequence:
1) Prepare a microSD card with a Linux image
2) Connect a serial terminal emulator such as PuTTY to the COM port (as shown in the guide above)
3) Power up the board
4) Hit a key to interrupt U-Boot
5) Enter bootaux and md.w commands
Stephen