Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

output GPIO on DE2

Hello I m trying to use the output GPIO on the DE2 board and cannot even get the clock to output. I have pin one out of a breakout board running through a 1k and then to Comm.

My code was immensely simple

GPIO_1(1) <=clock_27;

Is there something wrong? Is there a spefic string of code I need to output anything?

Thanks

12 Replies

Show More
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    I figured out my problem. Apparently certain grounds are only for certain pins. I poked around the breakout board and figured this out. .... I learned something today:-P

    Thanks for your time Dave!
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    --- Quote Start ---

    I figured out my problem. Apparently certain grounds are only for certain pins. I poked around the breakout board and figured this out. .... I learned something today:-P

    --- Quote End ---

    What!? They should not be called ground in that case!

    So I assume this problem was this on the breakout board?

    In hindsight, would you have seen this if you had been probing at the GPIO connector on the DE115?

    Cheers,

    Dave