gpio_scan.sh

#!/bin/bash

if ! mount | grep debugfs > /dev/null; then
    sudo mount -t debugfs none /sys/kernel/debug
fi

old_state=$(sudo cat /sys/kernel/debug/gpio)

# Print initial states
echo "$old_state"

# Read the exclude list
exclude_list=$(cat exclude_list.txt)

while true; do
    sleep 0.1
    new_state=$(sudo cat /sys/kernel/debug/gpio)

    # Use diff to compare the old and new states
    changes=$(diff <(echo "$old_state") <(echo "$new_state"))

    if [ "$changes" != "" ]; then
        # Calculate elapsed time in seconds
        current_time=$(cat /proc/uptime | cut -d '.' -f1)
        elapsed_time=$current_time

        # Filter out changes for excluded GPIO ports
        filtered_changes=$(echo "$changes" | grep -v -E "$exclude_list")

        if [ "$filtered_changes" != "" ]; then
            # Print elapsed time and changes
            echo "${elapsed_time}s:"
            echo "$filtered_changes"
        fi

        old_state=$new_state
    fi
done