Is this what you are referring to? http://derekmolloy.ie/beaglebone/beaglebone-gpio-programming-on-arm-embedded-linux/
https://github.com/derekmolloy/exploringBB Jon On Tue, Apr 7, 2020 at 3:20 PM Mala Dies <fun...@gmail.com> wrote: > Hello KenUnix, > > Seth here. Do you want me to still work on the C++ code or are you > satisfied w/ the shell script you are working on currently? > > Seth > > P.S. I found my book, ideas, and everything is on chapter six w/ source > already done for specific ideas. I would probably need to change some > source, too. Let a brother know. > > On Tuesday, April 7, 2020 at 11:39:56 AM UTC-5, KenUnix wrote: >> >> Robert, >> >> You were correct high level is better for now. It's been a long while >> since working >> with 'c'. Went the way of a bash script. Works well see below. Even >> supports --help. >> >> ---Code Start-- >> #!/bin/bash >> # >> # 4-7-2020 Ken >> # >> # cmd [state|label|on|off|in|out] gpio # >> # Example : cmd state 112 >> # >> if [ "$1" == "--help" ] >> then >> echo -e "\ngpio relay cape tool. 4-7-2020 KenUnix\n" >> echo "state Get state of gpio number" >> echo "label Display associated P number" >> echo "on Set relay # to on" >> echo "off Turn relay off" >> echo -e "out Set gpio to out\n" >> echo "Example: cmd status 115 Will display the state of gpio 115" >> echo -e " cmd on 20 Will turn relay 1 on for gpio 20\n" >> exit >> fi >> >> case $2 in >> 20|7|112|115) ;; >> *) echo "Invalid gpio $2" >> echo "Vaild numbers are 20, 7, 112 or 115" >> echo -e "Relay 1 20, relay 2 7, relay 3 112, relay 4 115\007" >> exit 1 ;; >> esac >> >> case $1 in >> "state") >> direction=`cat /sys/class/gpio/gpio$2/direction` >> echo -n "Direction $direction, State " >> state=`cat /sys/class/gpio/gpio$2/value` >> if [ "$state" == "0" ]; then echo "off"; fi >> if [ "$state" == "1" ]; then echo "on"; fi >> exit ;; >> "label") >> echo -n "Physical header pin number " >> cat /sys/class/gpio/gpio$2/label ; >> exit ;; >> "on") >> echo 1 >/sys/class/gpio/gpio$2/value >> exit ;; >> "off") >> echo 0 >/sys/class/gpio/gpio$2/value >> exit ;; >> "out") >> echo "out" > /sys/class/gpio/gpio$2/direction ; >> exit ;; >> "in") >> echo "in" > /sys/class/gpio/gpio$2/direction ; >> exit ;; >> *) echo -e "Invalid operation $1. Try cmd --help\007" ; exit 1 ;; >> esac >> --Code End-- >> >> Maybe someone else may find this useful. >> >> Ken >> >> > On Tuesday, April 7, 2020 at 11:39:56 AM UTC-5, KenUnix wrote: >> >> Robert, >> >> You were correct high level is better for now. It's been a long while >> since working >> with 'c'. Went the way of a bash script. Works well see below. Even >> supports --help. >> >> ---Code Start-- >> #!/bin/bash >> # >> # 4-7-2020 Ken >> # >> # cmd [state|label|on|off|in|out] gpio # >> # Example : cmd state 112 >> # >> if [ "$1" == "--help" ] >> then >> echo -e "\ngpio relay cape tool. 4-7-2020 KenUnix\n" >> echo "state Get state of gpio number" >> echo "label Display associated P number" >> echo "on Set relay # to on" >> echo "off Turn relay off" >> echo -e "out Set gpio to out\n" >> echo "Example: cmd status 115 Will display the state of gpio 115" >> echo -e " cmd on 20 Will turn relay 1 on for gpio 20\n" >> exit >> fi >> >> case $2 in >> 20|7|112|115) ;; >> *) echo "Invalid gpio $2" >> echo "Vaild numbers are 20, 7, 112 or 115" >> echo -e "Relay 1 20, relay 2 7, relay 3 112, relay 4 115\007" >> exit 1 ;; >> esac >> >> case $1 in >> "state") >> direction=`cat /sys/class/gpio/gpio$2/direction` >> echo -n "Direction $direction, State " >> state=`cat /sys/class/gpio/gpio$2/value` >> if [ "$state" == "0" ]; then echo "off"; fi >> if [ "$state" == "1" ]; then echo "on"; fi >> exit ;; >> "label") >> echo -n "Physical header pin number " >> cat /sys/class/gpio/gpio$2/label ; >> exit ;; >> "on") >> echo 1 >/sys/class/gpio/gpio$2/value >> exit ;; >> "off") >> echo 0 >/sys/class/gpio/gpio$2/value >> exit ;; >> "out") >> echo "out" > /sys/class/gpio/gpio$2/direction ; >> exit ;; >> "in") >> echo "in" > /sys/class/gpio/gpio$2/direction ; >> exit ;; >> *) echo -e "Invalid operation $1. Try cmd --help\007" ; exit 1 ;; >> esac >> --Code End-- >> >> Maybe someone else may find this useful. >> >> Ken >> >> -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/869c0859-6666-452f-9471-65627c6dc9aa%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/869c0859-6666-452f-9471-65627c6dc9aa%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. 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