Hello, I try to access GPIO on pin P9_12 from python script using Adafruit_GPIO package, the pin is not available for use. Python script complains about missing file:
ValueError: Set gpio mode failed, missing file or invalid permissions. config-pin does not see it either: $ sudo config-pin P9_12 gpio P9_12 pinmux file not found! bash: /sys/devices/platform/ocp/ocp*P9_12_pinmux/state: No such file or directory Cannot write pinmux file: /sys/devices/platform/ocp/ocp*P9_12_pinmux/state What works is exporting GPIO 60 through sys fs, and reading its value from /sys/class/gpio/gpio60/value With cape removed python script and config-pin work as expected. According to the documentation, the cape does not use this GPIO, so it should not be reserved. Here's output from version.sh: $ sudo /opt/scripts/tools/version.sh git:/opt/scripts/:[e307a944e0be0610ff5296e0abe4ad31a6e70daa] eeprom:[A335BNLTBWA51645BBWG0580] model:[TI_AM335x_BeagleBone_Black_Wireless] dogtag:[BeagleBoard.org Debian Image 2017-08-01] bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 2017.07-00002-g61c3ee0fb5]:[location: dd MBR] kernel:[4.14.21-bone-rt-r13] nodejs:[v4.8.7] uboot_overlay_options:[enable_uboot_overlays=1] uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-4-TI-00A0.dtbo] uboot_overlay_options:[enable_uboot_cape_universal=1] pkg:[bb-cape-overlays]:[4.4.20180223.0-0rcnee0~jessie+20180223] pkg:[bb-wl18xx-firmware]:[1.20170829-0rcnee2~jessie+20180104] pkg:[firmware-ti-connectivity]:[20170823-1rcnee0~jessie+20170830] groups:[debian : debian adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal netdev i2c bluetooth cloud9ide gpio pwm admin spi tisdk weston-launch xenomai] cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk1p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 quiet] dmesg | grep pinctrl-single [ 0.889759] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568 dmesg | grep gpio-of-helper [ 0.890749] gpio-of-helper ocp:cape-universal: ready END Regards, Jacek. -- Given a choice between two theories, take the one which is funnier -- 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/CAA2oDvbL58hGEDVft_FFTQ79haidCn3viqXzTi4%2BsXB5%2BOvUsA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
