# HG changeset patch # User František Kučera # Date 1478363885 -3600 # Node ID ec6e1bf8d53bfc4cc6d1e60cdd98dd9edf9853cd # Parent 4950117e9c1176fc1a1bd49cad3c2666820ee3ff rename bash → shell diff -r 4950117e9c11 -r ec6e1bf8d53b bash/gpio.sh --- a/bash/gpio.sh Sat Nov 05 17:34:34 2016 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,108 +0,0 @@ -#!/bin/bash - -# GPIO.sh -# Copyright © 2016 František Kučera (frantovo.cz) -# -# This program is free software: you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation, either version 3 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program. If not, see . - -# GPIO.sh is a set of functions for controlling GPIO pins of Raspberry Pi or similar computer - -_gpio_valid_port() { - case $1 in 0|1|4|7|8|9|10|11|14|15|17|18|21|22|23|24|25) - return 0;; - *) - return 1;; - esac -} - -# export -f _gpio_valid_port -# seq 0 30 | xargs -n1 bash -c 'printf "%4s" "$0: "; _gpio_valid_port $0 ; if [ $? -eq 0 ]; then echo "valid port number"; else echo; fi' - - -_gpio_log_error() { - # TODO: $(date --rfc-3339=seconds) or ● ? - echo -e "\e[1;31m$1\e[0m"; > /dev/stderr; -} - -_gpio_log_warning() { - echo -e "\e[2;33m$1 \e[0m"; > /dev/stderr; -} - - -# open (export) the port and set its direction -# parameters: -# port number -# direction: in/out -gpio_open() { - local port="$1"; - local direction="$2"; - if [ $# -ne 2 ] || [[ "$direction" != @("in"|"out") ]]; then _gpio_log_error "usage: ${FUNCNAME[0]} "; return 1; fi - if ! _gpio_valid_port "$port"; then _gpio_log_error "invalid port number: $port"; return 1; fi; - - if [ -d "/sys/class/gpio/gpio$port" ]; then - _gpio_log_warning "port $port is already exported → will just set direction: $direction"; - else - echo "$port" > "/sys/class/gpio/export" || return 1; - fi; - - echo "$direction" > "/sys/class/gpio/gpio$1/direction"; -} - - -# close (unexport) the port and set its direction -# parameters: -# port number -gpio_close() { - local port="$1"; - if [ $# -ne 1 ]; then _gpio_log_error "usage: ${FUNCNAME[0]} "; return 1; fi - if ! _gpio_valid_port "$port"; then _gpio_log_error "invalid port number: $port"; return 1; fi; - - if [ -d "/sys/class/gpio/gpio$port" ]; then - echo "$port" > "/sys/class/gpio/unexport"; - else - _gpio_log_error "port $port is not open"; - return 1; - fi; -} - -# reads value of given port -# parameters: -# port number -gpio_read() { - local port="$1"; - if [ $# -ne 1 ]; then _gpio_log_error "usage: ${FUNCNAME[0]} "; return 1; fi - if ! _gpio_valid_port "$port"; then _gpio_log_error "invalid port number: $port"; return 1; fi; - - if ! cat "/sys/class/gpio/gpio$port/value"; then - _gpio_log_error "unable to read value of port $port"; - return 1; - fi -} - -# writes the value to given port -# parameters: -# port number -# value: 0/1 -gpio_write() { - local port="$1"; - local value="$2"; - if [ $# -ne 2 ] || [[ "$value" != @("0"|"1") ]]; then _gpio_log_error "usage: ${FUNCNAME[0]} <0|1>"; return 1; fi - if ! _gpio_valid_port "$port"; then _gpio_log_error "invalid port number: $port"; return 1; fi; - - if ! echo "$value" > "/sys/class/gpio/gpio$port/value"; then - _gpio_log_error "unable to write value $value to port $port"; - return 1; - fi -} - diff -r 4950117e9c11 -r ec6e1bf8d53b shell/gpio.sh --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/shell/gpio.sh Sat Nov 05 17:38:05 2016 +0100 @@ -0,0 +1,108 @@ +#!/bin/bash + +# GPIO.sh +# Copyright © 2016 František Kučera (frantovo.cz) +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# GPIO.sh is a set of functions for controlling GPIO pins of Raspberry Pi or similar computer + +_gpio_valid_port() { + case $1 in 0|1|4|7|8|9|10|11|14|15|17|18|21|22|23|24|25) + return 0;; + *) + return 1;; + esac +} + +# export -f _gpio_valid_port +# seq 0 30 | xargs -n1 bash -c 'printf "%4s" "$0: "; _gpio_valid_port $0 ; if [ $? -eq 0 ]; then echo "valid port number"; else echo; fi' + + +_gpio_log_error() { + # TODO: $(date --rfc-3339=seconds) or ● ? + echo -e "\e[1;31m$1\e[0m"; > /dev/stderr; +} + +_gpio_log_warning() { + echo -e "\e[2;33m$1 \e[0m"; > /dev/stderr; +} + + +# open (export) the port and set its direction +# parameters: +# port number +# direction: in/out +gpio_open() { + local port="$1"; + local direction="$2"; + if [ $# -ne 2 ] || [[ "$direction" != @("in"|"out") ]]; then _gpio_log_error "usage: ${FUNCNAME[0]} "; return 1; fi + if ! _gpio_valid_port "$port"; then _gpio_log_error "invalid port number: $port"; return 1; fi; + + if [ -d "/sys/class/gpio/gpio$port" ]; then + _gpio_log_warning "port $port is already exported → will just set direction: $direction"; + else + echo "$port" > "/sys/class/gpio/export" || return 1; + fi; + + echo "$direction" > "/sys/class/gpio/gpio$1/direction"; +} + + +# close (unexport) the port and set its direction +# parameters: +# port number +gpio_close() { + local port="$1"; + if [ $# -ne 1 ]; then _gpio_log_error "usage: ${FUNCNAME[0]} "; return 1; fi + if ! _gpio_valid_port "$port"; then _gpio_log_error "invalid port number: $port"; return 1; fi; + + if [ -d "/sys/class/gpio/gpio$port" ]; then + echo "$port" > "/sys/class/gpio/unexport"; + else + _gpio_log_error "port $port is not open"; + return 1; + fi; +} + +# reads value of given port +# parameters: +# port number +gpio_read() { + local port="$1"; + if [ $# -ne 1 ]; then _gpio_log_error "usage: ${FUNCNAME[0]} "; return 1; fi + if ! _gpio_valid_port "$port"; then _gpio_log_error "invalid port number: $port"; return 1; fi; + + if ! cat "/sys/class/gpio/gpio$port/value"; then + _gpio_log_error "unable to read value of port $port"; + return 1; + fi +} + +# writes the value to given port +# parameters: +# port number +# value: 0/1 +gpio_write() { + local port="$1"; + local value="$2"; + if [ $# -ne 2 ] || [[ "$value" != @("0"|"1") ]]; then _gpio_log_error "usage: ${FUNCNAME[0]} <0|1>"; return 1; fi + if ! _gpio_valid_port "$port"; then _gpio_log_error "invalid port number: $port"; return 1; fi; + + if ! echo "$value" > "/sys/class/gpio/gpio$port/value"; then + _gpio_log_error "unable to write value $value to port $port"; + return 1; + fi +} +