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TE0720 custom carrier no JTAG access

Started by bigguiness, January 03, 2023, 10:17:56 PM

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bigguiness

Hello all,

I have a TE0720 board on a custom carrier board and cannot get the JTAG interface to work from Vivado.

I can connect to the board and I get this in the Hardware dialog:

localhost (1)                                   Connected
  xilinx_tcf/Digilent/251633000548BA (1)        Open
    Unknown_Device_0 (0)                        N/A


The Unknown_Device_0 has ID code 012BA043 and an IR length: 8, if that matters.

My carrier board has a TE0790-03 XMOD FTDI JTAG Adapter on it that I am trying to use as the JTAG interface.

I also have the BOOTMODE, JTAGMODE, EN1, and NOSEQ signals from the TE0720 connected to a dip switch. These signals are currently setup as:

MODE        HI   - QSPI boot
JTAGMODE    LOW  - Zynq SoC selected
EN1         HI   - on-board supplies enabled
NOSEQ       LOW  - Power sequencing enabled


I have also tried setting MODE LOW. When it is HI I see U-Boot start then the boot stops of I don't have an SD-Card installed. If it's installed the board boots. When MODE is HI I don't see anything on the console.

Changing the JTAGMODE setting does not seem to change anything.

Any ideas?

bigguiness

Oh, one other thing.

The Hardware Manager is also saying "There are no debug cores. Refresh device".

Clicking on the Refresh device does not change anything.

Thanks

bigguiness

I finally got the JTAG to work, but I'm not sure how....

Oh well...

JH

Hi,
good to hear that it works now.

QuoteUnknown_Device_0
this is normally the Lattice CPLD, in this case  JTAGMODE was wrong.

br
John