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Altera_Forum's avatar
Altera_Forum
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9 years ago

DE2 board GPIO Pin Output Voltage

Hi,

I am using de2 board for a project, and I am using the pins from JP1(GPIO_0) as my output pins. So I have three output pins from that, and two of them having the correct voltage level which is 0~3.3V, but there is one pin is output -1.4~2V. So I am wondering what is causing this problem and how to fix it? Thank you in advance!

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    9 years ago

    Try modifying the project's pinout - re-assign one of the signals that works to the (apparently) non-working pin. If the problem moves with the signal - and the non-working pin starts working - then you have a coding (or possibly project constraints) problem. If the problem remains on the same pin then the device has probably been damaged.

    Cheers,

    Alex
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    9 years ago

    So, I have switched to use another GPIO pin as my new output, and it seems working fine now. But I will do another testing, then I will come back and update on this post again. Thanks forks!