Nexys 2 Board LED errors

[azfarhussain]

I get the following errors when I try to light all LEDS of my Digilent Nexys 2 Board.  I follow the pin out naming specs as specified on the board.

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ERROR:Pack:1107 - Unable to combine the following symbols into a single IOB
   component:
    BUF symbol "data_out_4_OBUF" (Output Signal = data_out<4>)
    PAD symbol "data_out<4>" (Pad Signal = data_out<4>)
   Each of the following constraints specifies an illegal physical site for a
   component of type IOB:
    Symbol "data_out<4>" (LOC=E17)
   Please correct the constraints accordingly.
ERROR:Pack:1107 - Unable to combine the following symbols into a single IOB
   component:
    BUF symbol "data_out_5_OBUF" (Output Signal = data_out<5>)
    PAD symbol "data_out<5>" (Pad Signal = data_out<5>)
   Each of the following constraints specifies an illegal physical site for a
   component of type IOB:
    Symbol "data_out<5>" (LOC=P15)
   Please correct the constraints accordingly.
ERROR:Pack:1107 - Unable to combine the following symbols into a single IOB
   component:
    BUF symbol "data_out_6_OBUF" (Output Signal = data_out<6>)
    PAD symbol "data_out<6>" (Pad Signal = data_out<6>)
   Each of the following constraints specifies an illegal physical site for a
   component of type IOB:
    Symbol "data_out<6>" (LOC=F4)
   Please correct the constraints accordingly.
ERROR:Pack:1107 - Unable to combine the following symbols into a single IOB
   component:
    BUF symbol "data_out_7_OBUF" (Output Signal = data_out<7>)
    PAD symbol "data_out<7>" (Pad Signal = data_out<7>)
   Each of the following constraints specifies an illegal physical site for a
   component of type IOB:
    Symbol "data_out<7>" (LOC=R4)
   Please correct the constraints accordingly.

Message Edited by azfarhussain on 12-08-2009 04:11 AM

[gszakacs · Accepted solution]

Take a look at the reference manual.  There are pinout differences on the 1200 Kgate version.

On page 5 it shows the LED's with pinouts for the 500 Kgate part with 1200 Kgate pinout in parentheses.

LD4: E17 (E16)

LD5: P15 (P16)

LD6: F4 (E4)

LD7: R4 (P4)

These are the same 4 pins you're getting error messages on.  Are you using the -1200 part?

[azfarhussain]

Thank you so very much. :)