I am trying to use the AUDIO_MCLK pin of I2S as a GPIO to trigger a iDS camera. I have tried this with the development board and it has worked. The GPIO mapping for AUDIO_MCLK is 396. I am able to access the pins and the pins do change states. But for some reason, when ever the GPIO pin is connected to a voltmeter / a camera trigger, the pin is tuck at 1.5v and doesn’t change to 3.3v (high) or 0 (low) when connected. But if i disconnect the GPIO and leave it floating for a second and check the level, it changes to the correct level. I am not sure what is happening. I have tried pulling the pin up to 3.3v via 10K resistor, but that didn’t work either.
Any help is appreciated.