http://elinux.org/Beagleboard:Capes_3.8_to_3.14#Custom_dtb
The pins aren't mixed to the peripheral. Example enable this https://github.com/RobertCNelson/dtb-rebuilder/blob/3.14-ti/src/arm/am335x-boneblack.dts#L78 And run... make ; sudo make install ; sudo reboot On Nov 14, 2014 2:46 PM, <[email protected]> wrote: > I've been playing around with my BBB for about a month now and got > everything up and running. Today I spent the whole day to get UART loopback > to work on Debian. It simply doesn't work! Tried with Qt (cross-compiled > and all samples are working), QSerialPortInfo::availablePorts().count() > returns zero. At first I thought it can be a QtSerialPort issue. So I did a > loop back on UART1 and UART2 (P9.21 connected to P9.26 and P9.22 connected > to P9.24). Then opened "minicom -b 9600 -D /dev/ttyO1" and "minicom -b 9600 > -D /dev/ttyO2" in two separate terminals. I expected to see whatever I type > in each one of the terminals on the other one. But that wasn't the case. > Nothing happens! Any idea what's wrong? > > Here's some info about my setup: > > *Fresh install of > "BBB-eMMC-flasher-debian-7.7-console-armhf-2014-10-29-2gb.img.xz". Didn't > modify anything. * > > *"uname -a": * > Linux arm 3.14.22-ti-r31 #1 SMP PREEMPT Fri Oct 24 20:50:46 UTC 2014 > armv7l GNU/Linux > > *"dmesg | grep ttyO":* > [ 0.000000] Kernel command line: console=ttyO0,115200n8 > root=UUID=a52b5fd5-953d-458c-94d0-0cf2ff1c7115 ro rootfstype=ext4 rootwait > fixrtc quiet init=/lib/systemd/systemd > [ 2.799292] 44e09000.serial: ttyO0 at MMIO 0x44e09000 (irq = 88, > base_baud = 3000000) is a OMAP UART0 > [ 2.800424] console [ttyO0] enabled > [ 2.802247] 48022000.serial: ttyO1 at MMIO 0x48022000 (irq = 89, > base_baud = 3000000) is a OMAP UART1 > [ 2.803710] 48024000.serial: ttyO2 at MMIO 0x48024000 (irq = 90, > base_baud = 3000000) is a OMAP UART2 > [ 2.805198] 481a8000.serial: ttyO4 at MMIO 0x481a8000 (irq = 61, > base_baud = 3000000) is a OMAP UART4 > [ 2.806622] 481aa000.serial: ttyO5 at MMIO 0x481aa000 (irq = 62, > base_baud = 3000000) is a OMAP UART5 > > *"ls -al /dev/ttyO*":* > crw-rw---- 1 root tty 249, 0 Oct 29 19:06 /dev/ttyO0 > crw-rw---T 1 root dialout 249, 1 Nov 14 17:41 /dev/ttyO1 > crw-rw---T 1 root dialout 249, 2 Nov 14 17:41 /dev/ttyO2 > crw-rw---T 1 root dialout 249, 4 Jan 1 2000 /dev/ttyO4 > crw-rw---T 1 root dialout 249, 5 Jan 1 2000 /dev/ttyO5 > > > I appreciate anything that might help! :) > > -- > 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]. > For more options, visit https://groups.google.com/d/optout. > -- 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]. For more options, visit https://groups.google.com/d/optout.
