#!/bin/bash
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# This shell script used to control GPIO port on IGKBoard
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direction=out
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sysdir=/sys/class/gpio/
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pinbase=0
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groupin=32
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pinnum=
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pindir=
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action=
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set -u
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# RedLed: GPIO01_IO11 GreenLed: GPIO01_IO10 BlueLed: GPIO05_IO09
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function usage()
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{
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echo "Show pinmap Usage: $0 [-v]"
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echo "Output set Usage: $0 GPIO01_IO11 [1/0]"
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echo "Input read Usage: $0 [-i] GPIO01_IO11"
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echo "Unexport Usage: $0 [-u] GPIO01_IO11"
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exit;
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}
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function show_pinmap()
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{
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echo "
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+-------------+-------------+-------------+-------------+-------------+
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| GPIO | Name | Physical | Name | GPIO |
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+-------------+-------------+-----++------+-------------+-------------+
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| 3.3v | 3.3v | 1 || 2 | 5v | 5v |
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| GPIO01_IO03 | I2C1_SDA | 3 || 4 | 5v | 5v |
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| GPIO01_IO02 | I2C1_SCL | 5 || 6 | GND | GND |
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| GPIO01_IO18 | GPIO | 7 || 8 | UART2_TX | GPIO01_IO20 |
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| GND | GND | 9 || 10 | UART2_RX | GPIO01_IO21 |
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| GPIO01_IO24 | UART3_TX | 11 || 12 | UART3_RX | GPIO01_IO25 |
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| GPIO01_IO28 | UART4_TX | 13 || 14 | GND | GND |
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| GPIO01_IO29 | UART4_RX | 15 || 16 | UART7_TX | GPIO03_IO21 |
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| 3.3v | 3.3v | 17 || 18 | UART7_RX | GPIO03_IO22 |
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| GPIO03_IO27 | SPI1_MOSI | 19 || 20 | GND | GND |
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| GPIO03_IO28 | SPI1_MISO | 21 || 22 | GPIO | GPIO03_IO23 |
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| GPIO03_IO25 | SPI1_SCLK | 23 || 24 | SPI1_SS0 | GPIO03_IO26 |
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| GND | GND | 25 || 26 | GPIO | GPIO03_IO24 |
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| GPIO01_IO26 | CAN1_TX | 27 || 28 | PWM8 | GPIO01_IO15 |
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| GPIO01_IO27 | CAN1_RX | 29 || 30 | GND | GND |
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| GPIO01_IO22 | CAN2_TX | 31 || 32 | PWM7 | GPIO01_IO14 |
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| GPIO01_IO23 | CAN2_RX | 33 || 34 | GND | GND |
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| GPIO05_IO01 | GPIO | 35 || 36 | GPIO | GPIO01_IO11 |
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| GPIO05_IO08 | GPIO | 37 || 38 | GPIO | GPIO01_IO10 |
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| GND | GND | 39 || 40 | GPIO | GPIO05_IO09 |
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+-------------+-------------+-------------+-------------+-------------+
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| GPIO | Name | Physical | Name | GPIO |
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+-------------+-------------+-----++------+-------------+-------------+
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"
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exit 0;
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}
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function calc_pinum()
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{
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pinstr=$1
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group=`echo $pinstr | cut -d_ -f1 | tr -cd "[0-9]"`
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pin=`echo $pinstr | cut -d_ -f2 | tr -cd "[0-9]"`
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group=`expr $group \- 1`
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pinum=`expr $group \* $groupin + $pin + $pinbase`
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pindir=$sysdir/gpio$pinum
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#echo "INFO: GPIO $pinstr map to pinum[$pinum]"
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}
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function export_gpio()
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{
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if [ -e $pindir ] ; then
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return ;
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fi
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echo $pinum > $sysdir/export
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}
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function unexport_gpio()
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{
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if [ ! -e $pindir ] ; then
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return ;
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fi
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echo $pinum > $sysdir/unexport
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}
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function set_gpio()
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{
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echo out > $pindir/direction
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echo $1 > $pindir/value
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}
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function read_gpio()
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{
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echo in > $pindir/direction
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cat $pindir/value
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}
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if [ $# -lt 1 ] ; then
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usage;
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fi
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while getopts "iuvh" OPTNAME
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do
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case "${OPTNAME}" in
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"i")
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direction=in
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shift
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;;
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"u")
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action=unexport;
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shift
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;;
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"v")
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show_pinmap;
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shift
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;;
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"h")
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usage;
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;;
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esac
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done
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calc_pinum $1
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if [[ $action == unexport ]] ; then
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unexport_gpio
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exit;
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fi
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export_gpio
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if [ $direction == in ] ; then
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read_gpio
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else
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set_gpio $2
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fi
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