Digilent Basys2 LED issue

[becko1]

Hi,
My problem is the following: whenever i program my Basys2 Fpga board with Adept, the 8th led (LD7 - g1) is always turned on, even if the matching switch is set to 0, and if I want to use that Led with my program. It only works fine with the Adept user demo bit file (then I can turn off and on the led with the switch), with the Adept test, it doesn't work either.
Is my device malfunctioning or is there a solution to this? (Other than this, it works fine, if I dont need that led)

 

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I doubt it has anything to do with the Adept software that Digilent has to program the FPGA/config flash.

The bit file used is what determines if the LED is on/off and I looked at the schematic of the Basys2 board and there isn't any switches connected to the LED. The FPGA pin G1 is connected to a 390 ohm resistor which is connected to the LED anode and the cathode is grounded. There is no switch controlling the LED.

 

[becko1]

Well, it's odd since it works by using the switch in the user demo ( which runs as soon as i turn on the board). And even when i would need that led(7) as an output (i set it as), and it shouldn't illuminate (value 0), it still does (its a 2x4 bit comparator, which shows equality on Led0, and would show A greater than b on Led7 (just for the test). However, I have another bit file, which accomplishes a 8 bit counter (using led0-7), counts one by one, and that works fine, so it's not a hardware problem maybe.

 

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The demo probably uses the switch input on another pin to set the G1 output high, that's why it controls the LED. To shut off the LED you should drive a low level on the G1 pin, I imagine the bit files you are using have the pin driven high. I doubt the internal pullups on the Spartan are capable of allowing enough current to light up the LED.

 

[becko1]

https://www.youtube.com/watch?v=0Yfn5zd2RPQ , in this video, at 7:41, it shows the adept test mode, you can see there is no led illuminating, for me there is, the first from left. The problem is that it's like a default option for me when I program the bit files...and I wouldn't really want to shut it off, it should just work like the other ones, if I need it for an output. Plus I've used the same bit files, on a board like mine, and I'm almost sure the 7th led wasn't illuminating there. (I have that bit file which I said it works though, so I'm trying to go after it...)