Hello,
I'm trying to follow the Adafruit_BBIO UART tutorial
(https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/installation-on-ubuntu)
When I execute
UART.setup("UART1")
I get the following error:
RuntimeError: Unable to export UART channel.
Is this an error with the pinmuxing for UART or a different issue?
This is the message I get from
dmesg | grep tty
debian@beaglebone:~/Desktop$ dmesg | grep tty
[ 0.000000] Kernel command line: console=ttyO0,115200n8
root=/dev/mmcblk1p1 ro rootfstype=ext4 rootwait coherent_pool=1M
[ 0.002638] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'
[ 1.468369] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 158,
base_baud = 3000000) is a 8250
[ 2.278660] console [ttyS0] enabled
[ 2.283219] 48022000.serial: ttyS1 at MMIO 0x48022000 (irq = 159,
base_baud = 3000000) is a 8250
[ 2.293149] 48024000.serial: ttyS2 at MMIO 0x48024000 (irq = 160,
base_baud = 3000000) is a 8250
[ 2.302915] 481a8000.serial: ttyS4 at MMIO 0x481a8000 (irq = 161,
base_baud = 3000000) is a 8250
[ 2.312698] 481aa000.serial: ttyS5 at MMIO 0x481aa000 (irq = 162,
base_baud = 3000000) is a 8250
[ 8.022515] systemd[1]: Created slice system-getty.slice.
this is what I get when I print ls -l /dev/ttyO*
debian@beaglebone:/boot$ ls -l /dev/ttyO*
lrwxrwxrwx 1 root root 5 May 19 14:41 /dev/ttyO0 -> ttyS0
lrwxrwxrwx 1 root root 5 May 19 14:41 /dev/ttyO1 -> ttyS1
lrwxrwxrwx 1 root root 5 May 19 14:41 /dev/ttyO2 -> ttyS2
lrwxrwxrwx 1 root root 5 May 19 14:41 /dev/ttyO4 -> ttyS4
lrwxrwxrwx 1 root root 5 May 19 14:41 /dev/ttyO5 -> ttyS5
This is my uEnv.txt
debian@beaglebone:/boot$ cat uEnv.txt
# this uEnv.txt created by configure_robotics_dt
uname_r=4.9.78-ti-r94
dtb=am335x-boneblack-roboticscape.dtb
cmdline=coherent_pool=1M
debian@beaglebone:/boot$
This is my dogtag
debian@beaglebone:/boot$ cat /etc/dogtag
BeagleBoard.org Debian Image 2018-01-28
Thank you.
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