Hello All;
I have a script that enables the other UARTs on the BBB, when I run it after the system has booted.
The problem is I can’t get the same commands to execute automatically when UBUNTU 12.04LTS boots.
This is the bash file that works:
serials.sh
#!/bin/bash
cd /lib/firmware/
echo ttyO1_armhf.com > /sys/devices/bone_capemgr*/slots
echo ttyO2_armhf.com > /sys/devices/bone_capemgr*/slots
echo ttyO4_armhf.com > /sys/devices/bone_capemgr*/slots
echo tty01_armhf.com > /sys/devices/bone_capemgr*/slots
echo tty02_armhf.com > /sys/devices/bone_capemgr*/slots
echo tty04_armhf.com > /sys/devices/bone_capemgr*/slots
cd ~
Here is the result:
root@ubuntu-armhf:/# bash serials.sh
root@ubuntu-armhf:/# ls -l /dev/ttyO*
crw------- 1 root tty 249, 0 Jul 28 22:28 /dev/ttyO0
crw-rw---- 1 root dialout 249, 1 Jul 28 22:28 /dev/ttyO1
crw-rw---- 1 root dialout 249, 2 Jul 28 22:28 /dev/ttyO2
crw-rw---- 1 root dialout 249, 4 Jul 28 22:28 /dev/ttyO4
root@ubuntu-armhf:/#
If I put the same commands in .bash_profile this is what I get:
.bash_profile
PATH=$PATH:/home/ubuntu/local/cloud9/:/home/ubuntu/local/cloud9/bin/
export PATH
export NODE_PATH=/usr/local/bin/cloud9/node_modules
Required For Device Tree Overlays
export SLOTS=/sys/devices/bone_capemgr.9/slots
export PINS=/sys/kernel/debug/pinctrl/44e10800.pinmux/pins
Setup the other Serial Ports
echo “Setting up ttyO1 - ttyO4”
echo /lib/firmware/ttyO1_armhf.com > /sys/devices/bone_capemgr*/slots
echo /lib/firmware/ttyO2_armhf.com > /sys/devices/bone_capemgr*/slots
echo /lib/firmware/ttyO4_armhf.com > /sys/devices/bone_capemgr*/slots
ubuntu-armhf login: root
Password:
Last login: Mon Jul 28 22:25:16 UTC 2014 on ttyO0
Welcome to Ubuntu 12.04.4 LTS (GNU/Linux 3.8.13-bone20 armv7l)
- Documentation: https://help.ubuntu.com/
Setting up ttyO1 - ttyO4
[ 25.020726] bone-capemgr bone_capemgr.9: failed to load firmware ‘/lib/firmware/tt-00A0.dtbo’
-bash: echo: write error: No such file or directory
[ 25.050049] bone-capemgr bone_capemgr.9: failed to load firmware ‘/lib/firmware/tt-00A0.dtbo’
-bash: echo: write error: No such file or directory
[ 25.079348] bone-capemgr bone_capemgr.9: failed to load firmware ‘/lib/firmware/tt-00A0.dtbo’
-bash: echo: write error: No such file or directory
root@ubuntu-armhf:~# ls -l /dev/ttyO*
crw------- 1 root tty 249, 0 Jul 28 22:27 /dev/ttyO0
The .dtbo files are in /lib/firmware/ or the bash script wouldn’t work. Is there somewhere else I should put the commands ?
Thanks.
Bill
“No one could make a greater mistake than he who did nothing because he could do only a little.”
“All that is necessary for the triumph of evil is that good men do nothing” Edmond Burke (1729 - 1797)
http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book