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turning on led from pmod on nexys3

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twainerm

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Hi All,
I am trying to turn on an LED via pmod. but it is not working. i am using nexys3 board.
Here is verilog code:


Code Verilog - [expand]
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module TestWheelDriver(
output ain1, ain2
);
assign ain1 = 1'b1; 
assign ain2 = 1'b0;
endmodule



Here is the part of ucf file where i change pin connection on JA.
Code:
##JA
NET "ain1" LOC = "T12" | IOSTANDARD = "LVCMOS33"; #Bank = 2, Pin name = IO_L19P, Sch name = JA1
NET "ain2" LOC = "V12" | IOSTANDARD = "LVCMOS33"; #Bank = 2, Pin name = IO_L19N, Sch name = JA2

i have two wires connected to pin 1 and pin 2 on JA.
these wires go to LED via 490 ohm resistor.

i expected led to turn on. but it is not turning on.
please can anyone help me understand why this is not working and how to make it work.
 

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