Hi to all, I am working with a Beaglebone Black (A5C) on which I installed Ubuntu 16.04 and I have a hard time enabling the UART ports/pins. They seem to be disabled by default but every action I took resulted in the BBB either not caring about my modifications in the uEnv.txt file (or directly with a command) or either stalling when booting.
For example, if I try to use config-pin, it gives me this: root@arm:/home/ubuntu# config-pin -q p9.11 P9_11 pinmux file not found! cape-universal overlay not found run "config-pin overlay cape-universal" to load the cape root@arm:/home/ubuntu# config-pin overlay cape-universal Loading cape-universal overlay Segmentation fault Error loading device tree overlay file: cape-universal root@arm:/home/ubuntu# config-pin -q p9.11 P9_11 pinmux file not found! cape-universal already loaded Please verify your device tree file Or I tried to add optargs=capemgr.enable_partno=BB-UART1,BB-UART2,BB-UART4,BB-UART5 to my /boot/uEnv.txt file but in vain. Initially my goal is to control UART4 but I can use any other UART if needed. For information: ubuntu@arm:~$ uname -a Linux arm 4.14.11-ti-r22 #1 SMP Fri Jan 5 02:51:48 UTC 2018 armv7l armv7l armv7l GNU/Linux ubuntu@arm:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.3 LTS Release: 16.04 Codename: xenial ubuntu@arm:~$ ll /dev/ttyS* crw--w---- 1 root tty 4, 64 Mar 31 09:41 /dev/ttyS0 crw-rw---- 1 root dialout 4, 65 Mar 31 09:36 /dev/ttyS1 crw-rw---- 1 root dialout 4, 66 Mar 31 09:36 /dev/ttyS2 crw-rw---- 1 root dialout 4, 67 Mar 31 09:36 /dev/ttyS3 crw-rw---- 1 root dialout 4, 68 Mar 31 09:36 /dev/ttyS4 crw-rw---- 1 root dialout 4, 69 Mar 31 09:36 /dev/ttyS5 ubuntu@arm:~$ sudo cat /proc/tty/driver/serial serinfo:1.0 driver revision: 0: uart:8250 mmio:0x44E09000 irq:30 tx:66312 rx:0 RTS|CTS|DTR|DSR 1: uart:unknown port:00000000 irq:0 2: uart:unknown port:00000000 irq:0 3: uart:unknown port:00000000 irq:0 4: uart:unknown port:00000000 irq:0 5: uart:unknown port:00000000 irq:0 ubuntu@arm:~$ sudo cat /sys/devices/platform/bone_capemgr/slots [sudo] password for ubuntu: 0: PF---- -1 1: PF---- -1 2: PF---- -1 3: PF---- -1 ubuntu@arm:~$ sudo setserial -g /dev/ttyS[0-5] [sudo] password for ubuntu: /dev/ttyS0, UART: 8250, Port: 0x0000, IRQ: 30 /dev/ttyS1, UART: unknown, Port: 0x0000, IRQ: 0 /dev/ttyS2, UART: unknown, Port: 0x0000, IRQ: 0 /dev/ttyS3, UART: unknown, Port: 0x0000, IRQ: 0 /dev/ttyS4, UART: unknown, Port: 0x0000, IRQ: 0 /dev/ttyS5, UART: unknown, Port: 0x0000, IRQ: 0 ubuntu@arm:~$ dmesg | grep tty [ 0.000000] Kernel command line: console=ttyO0,115200n8 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 quiet [ 0.001222] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0' [ 0.910559] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 30, base_baud = 3000000) is a 8250 [ 0.926989] console [ttyS0] enabled ubuntu@arm:~$ sudo /opt/scripts/tools/version.sh git:/opt/scripts/:[70edebd65fe6ea7de16ea8efe3c48b2a4062034a] eeprom:[A335BNLT0A5C3313BBBK2131] model:[TI_AM335x_BeagleBone_Black] dogtag:[rcn-ee.net console Ubuntu Image 2018-01-05] bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 2018.03-00002-g254339602c]:[location: dd MBR] kernel:[4.14.11-ti-r22] pkg:[bb-cape-overlays]:[4.4.20180104.0-0rcnee1~xenial+20180104] pkg:[bb-wl18xx-firmware]:[1.20170829-0rcnee2~xenial+20180104] WARNING:pkg:[firmware-ti-connectivity]:[NOT_INSTALLED] groups:[ubuntu : ubuntu adm kmem dialout cdrom floppy audio dip video plugdev users systemd-journal netdev i2c gpio pwm eqep admin spi tisdk weston-launch xenomai bluetooth cloud9ide] cmdline:[console=ttyO0,115200n8 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 quiet] dmesg | grep pinctrl-single [ 0.902605] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568 dmesg | grep gpio-of-helper [ 0.903864] gpio-of-helper ocp:cape-universal: ready END The only thing I managed to modify successfully is doing $ echo BB-UART1 > /sys/devices/platform/bone_capemgr/slots and $ echo BB-UART4 > /sys/devices/platform/bone_capemgr/slots which stalls the terminal in which I'm doing it but by checking with another terminal, the output of $ sudo cat /sys/devices/platform/bone_capemgr/slots changes a bit: ubuntu@arm:~$ sudo cat /sys/devices/platform/bone_capemgr/slots 0: PF---- -1 1: PF---- -1 2: PF---- -1 3: PF---- -1 4: P-O--- -1 Override Board Name,00A0,Override Manuf,cape-universal 5: P-O--- -1 Override Board Name,00A0,Override Manuf,BB-UART1 6: P-O--- -1 Override Board Name,00A0,Override Manuf,BB-UART4 Does anyone having an idea of how to deal with this issue? Thanks, Marwan -- 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/aa53f626-fd71-44b0-abe7-b4f66d9ea169%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
