GPIO on the RockPro64 - all pins high?
Hi everyone,

I'm playing around with my brand new RockPro64 and trying to blink an LED using libgpiod. I have pin 24 hooked up to an LED, and no matter what I do, the LED is (dimly) lit. That's despite the fact that `gpioinfo` shows all the pins:

Quote:gpiochip4 - 32 lines:
        line  0:      unnamed      unused  input  active-high
        line  1:      unnamed      unused  input  active-high
        line  23:      unnamed      unused  input  active-high
        line  24:      unnamed      unused  input  active-high
        line  25:      unnamed      unused  output  active-high  # I've been trying to switch this pin on and off.

What's even weirder, every GPIO pin seems to be pushing a few volts out, even the ones marked GND in the diagram (for example, pin 6). To be specific, if I connect a jumper cable from PIN 6 to an LED/resistor and then to ground, the led lights up. 

Did I break something? Is there something I'm missing? I'm wondering if it has to do with u-boot, which I've flashed to SPI in order to support booting from a generic Manjaro image.

Thanks in advance for the help!

Messages In This Thread
GPIO on the RockPro64 - all pins high? - by colinmarc - 10-30-2022, 12:30 PM

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