First post here, I’m tagging it as hardware because I honestly don’t know if that’s a software issue.
I was trying to running the simplest of the code here to toggle a GPIO on and off. this was supposed to activate a relay. We have a Keensy relay.
According to the manufacturer, this relay can be activated either at a low or high level. This selection can be done by a jumper.
We perform a few tests first by setting the proper activation mode and trying to trigger it with a jumper cable on GND (for low level) and 3.3v (3v3 pin and high level).
Both methods worked just fine. when trying on the board though, by connecting it with the GPIO’s, no success.
I tried to inspect the voltage levels on the A7/A5/A4 pins using a multimeter, and they remain constant either on 3.3v or on 0v.
I’m suspecting the GPIO’s are not working. Maybe I’m missing something on this Evaluation Board? maybe a jumper I’m supposed to connect to make the GPIO’s work properly as an output or maybe a switch I’m not aware of?
I must confess I’m a bit afraid I might have fried the GPIO’s somehow, but I don’t think that is the case here because I’ve only used the board for this specific project and the Relays are supposed to isolate the board, not allowing any voltage to fall back into the GPIO’s so I cant see how the board my get damaged as well.
Anyone has any idea/solution or point of view I’m might be missing here?
Thank you very much in advance.