DE2 board GPIO Pin Output Voltage

[Altera_Forum]

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!

[Altera_Forum]

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]

you could use a test project (for the 115), see this thread.  

This may make it look more complicated than it is, so I suggest using a_x_h_75's suggestion first. http://www.alteraforum.com/forum/showthread.php?t=45973

[Altera_Forum]

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!