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Newbie
Newbie
9,146 Views
Registered: ‎01-29-2014

Virtex 4 FPGA GPIO I/O Issue (No Output)

Hello,

i have designed a board using VIRTEX4 (XC4VSX35-11FF668). Impact detects FPGA & PROM, i can program my FPGA.

Using Chipscope pro i can see the toggelled output signal. 

Problem is regarding the GPIO output, i can't see any output of the signals at GPIO's. i m using pin A23,B23,A24, B24.

but no output at the GPIO.

 

Plz provide some help.

THANKS

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Xilinx Employee
Xilinx Employee
9,141 Views
Registered: ‎07-11-2011

Hi,

 

What does your deisgn do ?

Outputs on GPIO depends on any inputs or you have driven them with constant pulses/logic?

 

 

 

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Historian
Historian
9,129 Views
Registered: ‎02-25-2008


@rehanbunny wrote:

Hello,

i have designed a board using VIRTEX4 (XC4VSX35-11FF668). Impact detects FPGA & PROM, i can program my FPGA.

Using Chipscope pro i can see the toggelled output signal. 

Problem is regarding the GPIO output, i can't see any output of the signals at GPIO's. i m using pin A23,B23,A24, B24.

but no output at the GPIO.


What's a GPIO?

----------------------------Yes, I do this for a living.
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Newbie
Newbie
9,120 Views
Registered: ‎01-29-2014

Constantly driven, i mean

 

IO1 = 1'b0;

IO2 = 1'b1;

IO3 = ~ IO3;

 

 

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Teacher
Teacher
9,116 Views
Registered: ‎11-14-2011

You're going to have to be a lot more informative than that if you want to get some useful help.

You state that you have designed a board (really? The whole board?) so it's a given that nobody here has any knowledge of it and its functions.

What is your FPGA design supposed to do? Can you post some code related to the failing part of the design?

Have you simulated your design?
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"That which we must learn to do, we learn by doing." - Aristotle
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