I am unable to setup a GPIO pin as an input using the Adafruit_BBIO
library. Setting the pin as an output works. Below is a simple version of
what I want to do. I searched several chat groups (this and the adafruit
forum) and the issues list for the Adafruit_BBIO library for ideas. I
tried updating my bootloader (from U-Boot 2018.09-00002-g9d95a561c9 to
U-Boot 2019.04-00002-gbb4af0f50f), but that did not have an impact. I am
using a UART port, so the uboot_overlay is enabled. The image version used
is based on the 9/11/18 release. I would prefer not to move to a newer
release quite yet, but do plan to do so in about a month. Is there
anything I can do here to make this work with this current setup? Please
let me know what other information would be useful here.
Python 3.6.7 (default, Oct 22 2018, 11:32:17)
[GCC 8.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import Adafruit_BBIO.GPIO as GPIO
>>> GPIO.setup('P8_11', GPIO.OUT, GPIO.PUD_UP, 0, 100)
>>> GPIO.output('P8_11', 1)
>>> GPIO.input('P8_11')
1
>>> GPIO.cleanup('P8_11')
>>> GPIO.setup('P8_11', GPIO.IN)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: Set gpio mode failed, missing file or invalid permissions.
sudo /opt/scripts/tools/version.sh
git:/opt/scripts/:[24f2e3495113a63c2dcc2c0bdc0d7660b54e4e8f]
eeprom:[A335BNLT00C02016BBBK1A0B]
model:[TI_AM335x_BeagleBone_Black]
dogtag:[RIAPS console Ubuntu Image 2019-03-22]
bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot
2019.04-00002-gbb4af0f50f]:[location: dd MBR]
kernel:[4.14.79-ti-rt-r84]
uboot_overlay_options:[enable_uboot_overlays=1]
uboot_overlay_options:[uboot_overlay_addr4=/lib/firmware/BB-UART2-00A0.dtbo]
uboot_overlay_options:[uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo]
pkg check: to individually upgrade run: [sudo apt install --only-upgrade
<pkg>]
pkg:[bb-cape-overlays]:[4.4.20190320.1-0rcnee0~bionic+20190320]
pkg:[bb-wl18xx-firmware]:[1.20190227.1-0rcnee0~bionic+20190227]
pkg:[kmod]:[24-1ubuntu3.2rcnee0~bionic+20190208]
WARNING:pkg:[librobotcontrol]:[NOT_INSTALLED]
cmdline:[console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1
root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M
net.ifnames=0 quiet security=apparmor]
dmesg | grep remote
[ 1.849544] remoteproc remoteproc0: wkup_m3 is available
[ 2.096540] remoteproc remoteproc0: powering up wkup_m3
[ 2.096675] remoteproc remoteproc0: Booting fw image
am335x-pm-firmware.elf, size 217168
[ 2.099941] remoteproc remoteproc0: remote processor wkup_m3 is now up
dmesg | grep pru
uname -a
Linux bbb-ff98 4.14.79-ti-rt-r84 #1 SMP PREEMPT RT Tue Nov 13 22:30:45 UTC
2018 armv7l armv7l armv7l GNU/Linux
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