#!/bin/bash
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# This shell script used to control GPIO port on RzBoard
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direction=out
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sysdir=/sys/class/gpio/
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pinbase=120
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groupin=8
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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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set -e
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# RedLed: P8_1 GreenLed: P17_2 BlueLed: P19_1
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# UserKey: P39_0
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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 P9_1 [1/0]"
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echo "Input read Usage: $0 [-i] P9_1"
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echo "Unexport Usage: $0 [-u] P9_1"
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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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+--------------------+--RzBoard--+--------------------+
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| Name/GPIO | Physical | Name/GPIO |
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+--------------------+-----++----+--------------------+
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| 3.3v | 1 || 2 | 5v |
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| SDA2(P3_0) | 3 || 4 | 5v |
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| SCL2(P3_1) | 5 || 6 | GND |
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| GPIO(P12_0) | 7 || 8 | TXD2(P48_0) |
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| GND | 9 || 10 | RXD2(P48_1) |
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| SCL3(P48_3) | 11 || 12 | GPIO(P17_1) |
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| SDA3(P48_2) | 13 || 14 | GND |
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| GPIO(P17_0) | 15 || 16 | GPIO(P13_2) |
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| 3.3v | 17 || 18 | GPIO(P14_0) |
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| SPI1_MOSI(P44_1) | 19 || 20 | GND |
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| SPI1_MISO(P44_2) | 21 || 22 | GPIO(P39_1) |
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| SPI1_CLK(P44_0) | 23 || 24 | SPI1_SS(P44_3) |
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| GND | 25 || 26 | GPIO(P0_1) |
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| GPIO(P14_1) | 27 || 28 | GPIO(P46_3) |
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| GPIO(P42_3) | 29 || 30 | GND |
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| GPIO(P42_4) | 31 || 32 | GPIO(P15_1) |
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| GPIO(P10_0) | 33 || 34 | GND |
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| GPIO(P9_1) | 35 || 36 | RTS2(P48_4) |
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| GPIO(P13_1) | 37 || 38 | CAN0_RX(P11_0) |
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| GND | 39 || 40 | CAN0_TX(P10_1) |
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+--------------------+-----++----+--------------------+
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| Name/GPIO | Physical | Name/GPIO |
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+--------------------+--RzBoard--+--------------------+
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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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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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