Trouble connecting to PicoZed to program bitstream via JTAG

Question

Hello All,

Hardware used:

1. PicoZed FMC Carrier Card V2 + PicoZed 7Z030 SOM

2. Digilent JTAG HS3 cable

Software used: Vivado 2020.1

I want to program the Programmable logic with bitstream via JTAG connection through Vivado. But I am getting an error message "No devices detected on target" on either trying to "auto-connect" or "open new target with different JTAG clock frequencies" option under "open hardware manager" in Vivado. Error message is shown in the snippet below.

Following are the jumper settings:

1. JP3 is closed in position 1-2
2. JP4 is closed
3. JP5 closed in the position 1-2

4. PicoZed SOM is set in JTAG boot mode

On turning on the power of the board, PG_MODULE(D4 LED), VIN_HDR(D5 LED) and D14 LED turns on (carrier board) and D3 LED turns on (PicoZed SOM). I have previously tried to perform SD boot which was successful and PS red LEDs flashed.

Could you please help me figure out what could be the issue?

narrucmot · Accepted Answer

Hi Richa,

Can you verify that your SOM is fully seated in the connectors to the carrier card? Even though SD card boot works, the JTAG signals may not be fully connected. The SOM connectors are very stiff and sometimes difficult to mate the SOM to the carrier.

Also, are you using the Vivado tools on a Linux or Windows host? I have noticed on a Linux host that the JTAG drivers are very finicky and sometimes require a few retries to get Vivado to recognize the Zynq device.

--Tom

Trouble connecting to PicoZed to program bitstream via JTAG

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