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Altera_Forum
Honored Contributor I
789 Views

Fan stopped on FPGA

Hi,  

 

:confused: I have downloaded a programming file into my DSP Stratix EP2S180 and the fan above the stratix stopped. 

 

Any idea ? 

 

thanks
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6 Replies
Altera_Forum
Honored Contributor I
38 Views

You are probably over-drawing the power supply. Double check that unused pins are set to tristate, not GND. There is an assignment in the GUI, or you can steal it from the QSF file for an existing project. Double check that you aren't in IO contention with an external device.  

 

I do that all the time.
Altera_Forum
Honored Contributor I
38 Views

keep us posted on this one.

Altera_Forum
Honored Contributor I
38 Views

Read manual properly. 

You have to assign all unused pins to "Tri-stated inputs" in Device and pin assignments.  

You might have forgot that.
Altera_Forum
Honored Contributor I
38 Views

How do I do this in quartus II? 

 

Thank you
Altera_Forum
Honored Contributor I
38 Views

For Quartus II v8.0 do the following. 

Go to Assignment->Device 

Click 'Device and Pin' Option Button in the dialog box. 

Click 'Unused Pin' tab in the dialog box. 

Set 'Reserve All unused pins' to 'As Input Tri stated' if not already so. 

Click OK twice. 

Its done !! 

Now if you compile fully and load the .sof into kit, the fan will keep running.....
Altera_Forum
Honored Contributor I
38 Views

I don't know if there are issues related to what I did, but since I can program the device from distance (another machine with JTAG Server), I have hardwired the fan wires to GND and VCC. 

 

The black wire is now connected to the nearest GND pin on the Dev Board, and 

the red wire is connected to the nearest 5V pin on the Dev Board. 

 

So, it doesn't matter, what I program to the Stratix II component, the fan will never stop. 

 

Gabriel, 

 

PS: I really don't know if there are related issues with this procedure, but I'm using it since 2007.