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Quartus II VHDL exercise 1

Altera_Forum
Honored Contributor II
‎02-25-2011 01:42 AM
1,261 Views

So, I'm having a bit of trouble with the first VHDL exercise provided with the Altera DE2 board. We've used the code provided, done the pin assignments as instructed, and the program, in general, works. (it's a simple thing designed to familiarize with the board; assigning each toggle switch to control the red LED above it) 

 

However, LEDR[0] is constantly on. We've written another program to test the functionality of SW[0], and it's not the switch. Additionally, the red LED is only on when the board has that particular program on it. 

 

Any help would be appreciated.
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Altera_Forum
Honored Contributor II
‎02-25-2011 08:58 AM
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can you use the FPGA viewer (that shows you the exact location of the logic and the routing) to check that you're actually driving the proper pin?

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