BananaPro sysfs pin numbers

justwantin · 10-03-2016, 09:06 PM

I have previously used lemakers modified wiring pi on a bananapro but have decided now that I have slackwarearm hard float up and running that I will just use sysfs pin numbers. Seemed a bit silly to compile and run a program that assigns a number to something that already has a number. I have attached a .png with the pin numbering. All sysfs pin numbers have been confirmed correct with the script that follows below. These pin numbers will not work on a bananapi but sysfs pin numbers for the bananapi could be calculated using the same method described for the mainline kernel at: http://http://linux-sunxi.org/GPIO

Code:

#!/bin/bash
##############################################################
# /usr/local/bin/test-gpio.sh RM20160728
#
# Used to test GPIO sysfs numbering on a Lemaker Banana Pro
# as per: https://linux-sunxi.org/GPIO
# This script is run as root
# Usage: /path/test-gpio.sh [pin number] [1] on [2] off
# Refer to: https://www.kernel.org/doc/Documentation/gpio/sysfs.txt
# for usage in mainline kernels
##############################################################

POWER_PIN=$1
ON_OFF=$2

echo "$POWER_PIN" > /sys/class/gpio/export 2> /dev/null

case "$2" in
    '1') # on
        echo "$POWER_PIN" > /sys/class/gpio/export 2> /dev/null
        echo "out" > /sys/class/gpio/gpio$POWER_PIN/direction
        echo "1" > /sys/class/gpio/gpio$POWER_PIN/value
    ;;

    '0') # off
        echo "0" > /sys/class/gpio/gpio$POWER_PIN/value
        echo "$POWER_PIN" > /sys/class/gpio/unexport 2> /dev/null
    ;;
esac