Robert Nelson has answered my question. There are a number of pins already used on the BeagleBone Green Wireless that can't otherwise be used.
I've made a list of them[1]. --Mark [1] https://elinux.org/EBC_Exercise_10b_Green_Wireless_Pins_Used On Tuesday, September 11, 2018 at 9:45:16 AM UTC-4, Mark A. Yoder wrote: > > I'm trying to drive a ili9341 display via the frame buffer, but have hit a > snag. There are a number of gpio pins I want to use the are already > exported. > > bone$ cd */sys/class/gpio/* > /sys/class/gpio /sys/devices/platform/ocp > bone$ *ls* > export gpio116 gpio22 gpio35 gpio46 gpio62 gpio70 gpio78 gpio89 > gpio10 gpio117 gpio23 gpio36 gpio47 gpio63 gpio71 gpio79 gpio9 > gpio11 gpio12 gpio3 gpio37 gpio48 gpio65 gpio72 gpio8 gpiochip0 > gpio110 gpio13 gpio30 gpio38 gpio49 gpio66 gpio73 gpio80 > gpiochip32 > gpio111 gpio14 gpio31 gpio39 gpio5 gpio67 gpio74 gpio81 > gpiochip64 > gpio113 gpio15 gpio32 gpio4 gpio50 gpio68 gpio75 gpio86 > gpiochip96 > gpio114 gpio2 gpio33 gpio44 gpio51 gpio69 gpio76 gpio87 unexport > gpio115 gpio20 gpio34 gpio45 gpio60 gpio7 gpio77 gpio88 > > I can't unexport them. > > bone$ *echo 115 > unexport* > -bash: echo: write error: Invalid argument > > How do I reclaim these? > > --Mark > > bone$ *sudo /opt/scripts/tools/version.sh * > git:/opt/scripts/:[29878c8f9a13833ac69956ecc086c95b99726dde] > eeprom:[A335BNLTGW1ABBGW16052042] > model:[TI_AM335x_BeagleBone_Green_Wireless] > dogtag:[BeagleBoard.org Debian Image 2018-07-29] > bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot > 2018.03-00002-gac9cce7c6a]:[location: dd MBR] > kernel:[4.14.58-ti-r65] > nodejs:[v6.14.3] > uboot_overlay_options:[enable_uboot_overlays=1] > uboot_overlay_options:[disable_uboot_overlay_video=1] > > uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo] > uboot_overlay_options:[enable_uboot_cape_universal=1] > pkg check: to individually upgrade run: [sudo apt install --only-upgrade > <pkg>] > pkg:[bb-cape-overlays]:[4.4.20180727.0-0rcnee0~stretch+20180727] > pkg:[bb-wl18xx-firmware]:[1.20180517-0rcnee0~stretch+20180517] > pkg:[kmod]:[23-2rcnee1~stretch+20171005] > pkg:[librobotcontrol]:[1.0.0-git20180726.0-0rcnee0~stretch+20180727] > pkg:[firmware-ti-connectivity]:[20170823-1rcnee1~stretch+20180328] > groups:[debian : debian adm kmem dialout cdrom floppy audio dip video > plugdev users systemd-journal i2c bluetooth netdev cloud9ide gpio pwm eqep > admin spi tisdk weston-launch xenomai] > cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 > root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M > net.ifnames=0 quiet] > dmesg | grep pinctrl-single > [ 1.046339] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 > size 568 > dmesg | grep gpio-of-helper > [ 1.057509] gpio-of-helper ocp:cape-universal: ready > END > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/95eab087-9dee-4d00-9ab7-087ca8252a57%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
