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Altera_Forum's avatar
Altera_Forum
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8 years ago

GPIO Pin Problems

Hi all, I am attempting to interface an ultrasonic range sensor with the DE2 board through the GPIO expansion header. The device has 4 connections, 5v vcc, ground, trigger, and echo. The 5v and gr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Okay, I've got everything set with default to ground including the SW, but the problem persists. Do I need to try and ground all the unused pins as well? I don't understand where the voltage could be coming from at this point. If you can think of any other settings or ideas to try please let me know!