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Altera_Forum
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10 years ago

Quartus 14.1 pollutes 13.0 project

I'm targeting an EPM3064ATC44-10N. I updated to Quartus 14.1 and it said this part is no longer supported. I opened the project with the 13.0 version that has been working. I can no longer pr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Thanks Alex!

I am running the Windows version. Pete, I think you are right.

The project recompiled after deleting all but the .qsf, .qpf, and the RTL. I still can't program the device.

I can run it all around JTAG states in the 'JTAG Chain Debugging'. (At least the the icons light up blue in the 'TAP state' pane. Clicking on 'Test JTAG Chain' still yields: Device name UNKNOWN_170640DD already exists.

I looked at all the JTAG signals with a scope. They all look reasonable - able to go up and down at the chip. The TDI signal looks a little funny. It goes low quickly and meanders high slowly. I stuck another pull-up on it temporarily and it still didn't pull up any faster.

I tried multiple target boards. They all do the same thing.

In 'Hardware Setup', it finds my USB-Blaster [USB-0].

I tried another USB-Blaster. I rebooted my computer.

Assuming it's the USB-Blaster driver update for 14.1, how can I downgrade the driver to the 13.0 version?