JTAG connection in SAMA5D3 Xplained board

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tmoSL
Posts: 3
Joined: Tue Jun 26, 2018 12:35 am

JTAG connection in SAMA5D3 Xplained board

Tue Jun 26, 2018 12:52 am

Hi,
I'm trying to connect the I-jet pod to an SAMA5D3 Xplained board using IAR ARM IDE 8.20.1. The pod connects correctly if the JP5 NAND CS jumper is closed, but fails if the JP5 NAND CS jumper is open.

The NAND flash is what's shipped with SAMA5D3 Xplained board, that is the Poky Linux, so I understand the JTAG connection works with a valid NAND image, but failed to understand why connection fails without CS jumper.

I do have the DBGU connected to Putty, and I entered return keys in an attempt to satisfy the default ROM monitor, to come out of the security boot mode, and re-enable JTAG.

The debug log is shown below. Note the one line about warning on JTAG TCK, and one error about TDO permanently at low.

Mon Jun 25, 2018 17:01:37: IAR Embedded Workbench 8.20.1 (C:\Program Files (x86)\IAR Systems\Embedded Workbench 8.0\arm\bin\armproc.dll)
Mon Jun 25, 2018 17:01:37: Loaded macro file: C:\Program Files (x86)\IAR Systems\Embedded Workbench 8.0\arm\config\debugger\Atmel\SAMA5D3.dmac
Mon Jun 25, 2018 17:01:37: Loading the I-jet/JTAGjet driver
Mon Jun 25, 2018 17:01:38: Probe: Probe SW module ver 1.60
Mon Jun 25, 2018 17:01:38: Probe: Option: trace(SWO,ETB)
Mon Jun 25, 2018 17:01:38: Probe: I-jet-Trace SW module ver 1.63
Mon Jun 25, 2018 17:01:38: Probe: Found I-jet, SN=86273
Mon Jun 25, 2018 17:01:38: Probe: Opened connection to I-jet:86273
Mon Jun 25, 2018 17:01:38: Probe: USB connection verified (4555 packets/sec)
Mon Jun 25, 2018 17:01:38: Probe: I-jet, FW ver 7.2, HW Ver:B
Mon Jun 25, 2018 17:01:38: Probe: IJET-ARM20 adapter detected
Mon Jun 25, 2018 17:01:38: Probe: Versions: JTAG=1.78 SWO=1.38 A2D=1.70 Stream=1.49 SigCom=2.44
Mon Jun 25, 2018 17:01:38: Emulation layer version 4.26
Mon Jun 25, 2018 17:01:38: Warning: JTAG clock cannot be automatically determined. Set the clock manually.
Mon Jun 25, 2018 17:01:38: A default 9.6MHz is used.
Mon Jun 25, 2018 17:01:38: Notification to core-connect hookup.
Mon Jun 25, 2018 17:01:38: CPU status FAILED
Mon Jun 25, 2018 17:01:38: MultiCore: Asynchronous core execution FORCED.
Mon Jun 25, 2018 17:01:38: MultiCore: Synchronous core execution DISABLED.
Mon Jun 25, 2018 17:01:38: LowLevelReset(software, delay 200)
Mon Jun 25, 2018 17:01:41: Fatal error: Failed to connect to CPU Session aborted!
Mon Jun 25, 2018 17:01:41: JTAG test failed - the TDO/SWDIO pin held permanently low.
Mon Jun 25, 2018 17:01:42: IAR Embedded Workbench 8.20.1 (C:\Program Files (x86)\IAR Systems\Embedded Workbench 8.0\arm\bin\armproc.dll)
Mon Jun 25, 2018 17:01:42: Loading the I-jet/JTAGjet driver

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