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Hi Craig,
There're some settings in Intel BIOS setup menu for enabling DCI debugging:
1. Intel Advanced Menu -> PCH-IO Configuration -> DCI Enable (HDCIEN) -> Set to 'Enabled'
2. Intel Advanced Menu -> CPU Configuration -> Direct Connect Interface -> Set to value <Enabled>
3. Intel Advanced Menu -> PCH-IO Configuration -> Trace Hub Configuration Menu -> Trace Hub Enable Mode -> Set to value <Host Debugger>
However, your NUC system is the production PC. It has production CPU (debugging function is locked) and customized BIOS (no DCI option in the BIOS setup menu). It means you're unable to establish the DCI connection without a BIOS engineer's help. I'm not a BIOS guy but you can mail me (soflen.shih@intel.com) and elaborate more about your purpose of debugging with DCI. Then, I can forward your request to our NUC team.
Best regards,
Soflen
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Soflen S. (Intel) wrote:
Hi Craig,
There're some settings in Intel BIOS setup menu for enabling DCI debugging:
1. Intel Advanced Menu -> PCH-IO Configuration -> DCI Enable (HDCIEN) -> Set to 'Enabled'
2. Intel Advanced Menu -> CPU Configuration -> Direct Connect Interface -> Set to value <Enabled>
3. Intel Advanced Menu -> PCH-IO Configuration -> Trace Hub Configuration Menu -> Trace Hub Enable Mode -> Set to value <Host Debugger>
However, your NUC system is the production PC. It has production CPU (debugging function is locked) and customized BIOS (no DCI option in the BIOS setup menu). It means you're unable to establish the DCI connection without a BIOS engineer's help. I'm not a BIOS guy but you can mail me (soflen.shih@intel.com) and elaborate more about your purpose of debugging with DCI. Then, I can forward your request to our NUC team.
Best regards,
Soflen
Hi Soflen,
I am running into a similar issue. I sent you an e-mail with my details.
I appreciate any help.
Thank you.
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Soflen S. (Intel) wrote:
Hi Craig,
There're some settings in Intel BIOS setup menu for enabling DCI debugging:
1. Intel Advanced Menu -> PCH-IO Configuration -> DCI Enable (HDCIEN) -> Set to 'Enabled'
2. Intel Advanced Menu -> CPU Configuration -> Direct Connect Interface -> Set to value <Enabled>
3. Intel Advanced Menu -> PCH-IO Configuration -> Trace Hub Configuration Menu -> Trace Hub Enable Mode -> Set to value <Host Debugger>
However, your NUC system is the production PC. It has production CPU (debugging function is locked) and customized BIOS (no DCI option in the BIOS setup menu). It means you're unable to establish the DCI connection without a BIOS engineer's help. I'm not a BIOS guy but you can mail me (soflen.shih@intel.com) and elaborate more about your purpose of debugging with DCI. Then, I can forward your request to our NUC team.
Best regards,
Soflen
Hi Soflen,
I am running into a similar issue. I sent you an e-mail.
I appreciate any help.
Thanks!
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I am using Intel System Studio 2019 Gold Release_12 and I am trying to connect the DCI USB 3.x Debug Class Cable to a Up Squared (Apollo Lake) Board (https://www.aaeon.com/en/p/iot-gateway-maker-boards-up-squared) but I am getting a connection failure with the Error message:
10:05:21 [ERROR] Connection Manager: Status change: FAILED
Error: The selected target is not available
Connection: Intel Atom Processors N4200_ N3350_ x7-E3950_ x5-39xx (Apollo Lake) (1)
Target: Intel Atom Processors N4200, N3350, x7-E3950, x5-39xx (Apollo Lake)
Connection Method: Intel(R) DCI USB 3.x Debug Class
Any help is appreciated.
Thanks,
Laurie
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Intel NUC 8i7BEH
BIOS setting
Performance->Processor->Silicon Debug Feature = yes
boot linux
modprobe msr
rdmsr 0xc80
40000000
according Intel SDM vol4
MSR C80H 3200 IA32_DEBUG_INTERFACE Silicon Debug Feature Control (R/W)
bit 0 = 0 Disabled
bit 30 = 1 latch, so bit 0 can not be set to 1.
BIOS has no settings for integrated PCH to enable DCI (USB Debug ) at all.
So I'm very disappointed.

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